6 F 8 A 0 9 3 4 Electromagnetic Flowmeter CAPACITANCE TYPE MODEL LF516 / LF546 INSTRUCTION MANUAL NOTES Before using the equipment, please read this manual carefully and understand the contents, and then use the equipment correctly. • NEVER attempt to operate the equipment in any ways that are not described in this instruction manual. • After reading this manual, store it with care in a place where it can be referred to whenever needed.
6 F 8 A 0 9 3 4 NOTICE We thank you very much for your purchase of our LF516/LF546 CAPACITANCE TYPE series electromagnetic flowmeter. This instruction manual describes the notes on using an electromagnetic flowmeter , installation, configuration and maintenance. It is intended for the personnel in charge of installation, operation and maintenance. To use this product properly and safely, read this manual carefully before using this product.
6 F 8 A 0 9 3 4 SAFETY PRECAUTIONS Safety signs and labels affixed to the product and/or described in this manual give important information for using the product safely. They help prevent damage to property and obviate hazards for persons using the product. Make yourself familiar with signal words and symbols used for safety signs and labels. Then read the safety precautions that follow to prevent an accident involving personal injury, death or damage to property.
6 F 8 A 0 9 3 4 SAFETY PRECAUTIONS (continued) Safety Precautions for Hazardous Locations WARNING Do not disconnect while circuit is live unless location is known to be nonhazardous. Live part of electric circuit or a high temperature department can cause explosion. DON’T Do not modify or disassemble the enclosure. Strength degradation and defects of enclosure can cause explosion. DON’T Do not use parts of other products.
6 F 8 A 0 9 3 4 Safety Precautions for Installation and Wiring CAUTION Install a switch and fuse to isolate the LF516/LF546 from mains power. DO Use an appropriate device to carry and install the LF516/LF546. Power supply from mains power can cause electric shock or circuit break-down. If this product falls to the ground, injury, or malfunction of or damage to the product, can be caused. DO ■ Use crimped terminal lugs for the terminal board and GND terminal.
F 8 A 0 9 3 4 SAFETY PRECAUTIONS (continued) Safety Precautions for Maintenance and Inspection CAUTION Do not touch LF516/LF546 main body when high temperature fluid is being measured. The fluid raises the main body temperature and can cause burns when touched. DON’T Do not conduct wiring work when power is applied. Wiring while power is applied can cause electric shock. DON’T Do not conduct wiring work with wet hands.
6 F 8 A 0 9 3 4 Handling Precautions To obtain the optimum performance from LF516/LF546 flowmeter for years of continuous operation, observe the following precautions. (1) Do not store or install the flowmeter in : ・Where there is direct sunlight. ・Where excessive vibration or mechanical shock occurs. ・Where high temperature or high humidity conditions obtain. ・Where corrosive atmospheres exist. ・That can be places submerged under water. ・Where there is a sloped floor.
6 F 8 A 0 9 3 4 Handling Precautions (continued) (6) Observe the following precautions when you open the converter housing cover: • Do not open the cover in the open air unprotected against rain or wind. This can cause electric shock or cause damage to the flowmeter electronics. • Do not open the cover under high ambient temperature or high humidity conditions or in corrosive atmospheres. This can cause deterioration of system accuracy or cause damage to the flowmeter electronics.
6 F 8 A 0 9 3 4 Table of Contents 1. Product Inspection and Storage............................................................................................................................ 11 1.1 Product Inspection......................................................................................................................................... 11 1.2 Storage.............................................................................................................................................
6 F 8 A 0 9 3 4 8.1 8.2 8.3 9. Parameter Setting Items................................................................................................................................ 53 Check/Change of Parameters ....................................................................................................................... 54 8.2.1 Menu Configuration Selection Screen ............................................................................................. 54 8.2.2 Exciting Current Value.......
6 F 8 A 0 9 3 4 11. Communications Function .................................................................................................................................. 131 11.1 Connections with HHT Terminal .................................................................................................................. 131 11.2 Procedures for Communication with HHT ................................................................................................... 132 11.3 Notes on Communications ...
6 F 8 A 0 9 3 4 1. Product Inspection and Storage 1.1 Product Inspection LF516/LF546 electromagnetic flowmeter is shipped in a cardboard container filled with shock-absorbing materials. Open the package carefully and check as follows: Make sure the following items are included in the package. Inspect the flowmeter for indications of damage that may have occurred during shipment. Make sure the type and specifications of the flowmeter are in accordance with the ordered specifications.
6 F 8 A 0 9 3 4 2. Overview LF516/LF546 electromagnetic flowmeter can be use in the following hazardous (classified) locations. ClassⅠ, Division 2, Groups A, B, C and D, ClassⅡ, Division 2, Groups E, F and G ClassⅢ This product is electromagnetic flowmeter that measure the volumetric flow rate of conductive fluid using Faraday's law of electromagnetic induction.
6 F 8 A 0 9 3 4 3. Names of Parts IMPORTANT The cable connections are not provided in the conduit port of this apparatus. Please prepare yourself for the cable connections, which could be used in Division2 hazardous locations. 3.1 Appearance of LF516/LF546 Converter Terminal block cover Display section For power cable Control key (Control panel) For current output cable Ground terminal Raised portion Detector Figure 3.1.
6 F 8 A 0 9 3 4 3.2 Construction of the terminal blocks Terminal Block Construction of LF546 Converter When you remove the terminal block cover shown in the figure "Appearance of LF516/LF546", you can see the converter terminal block as shown below. Power supply terminal Internal grounding terminal Fuse Digital output terminal 0.
6 F 8 A 0 9 3 4 4. Installation Safety Precautions for Installation WARNING Do not activate live circuits under environment of explosive atmospheres. Live part of electric circuit or a high temperature department can cause explosion. DON’T Do not use parts of other products. Protective performance degradation for hazardous location can cause explosion. DON’T Do not activate circuits While assembly of all components is not over.
6 F 8 A 0 9 3 4 4.1 Notes on Selecting the Installation Location This product is designed for the following environment. ・Indoor and outdoor installation ・Ambient temperature:−10 to ＋50℃ ・Altitude:Up to 2000m ・Humidity range:10 to 90%(no condensation) ・Regulation of power voltage:±10% ・Pollution degree 2 ・Structure:IP67 and NEMA 4X Do not store or install the flowmeter in : 1. 2. 3. 4. 5. 6. 7. 8. 9.
6 F 8 A 0 9 3 4 4.2 Mounting Procedure 1. 2. 3. 4. 5. 6. 7. 8. 9. Avoid places within the immediate proximity of equipment producing electrical interference (such as motors, transformers, radio transmitters, electrolytic cells, or other equipment causing electromagnetic or electrostatic interference). Avoid places where excessive pipe vibration occurs. Avoid places where fluid runs in a pulsating form. Avoid places where there is direct sunlight.
6 F 8 A 0 9 3 4 (2) Preventing an Empty Pipe Condition Fix the relevant pipes installed on both sides of the detector by attach fittings, etc. to support the pipe. By supporting the pipes, not only the pipe vibration is reduced but also the damage to the pipes by the electromagnetic flowmeter's weight and the fluid mass (see Figures 4.2 and 4.3). Pipe support fittings Pipe support fittings Figure 4.2 Figure 4.
6 F 8 A 0 9 3 4 4.2.2 Installation Procedure To mount the LF516/LF546, place it between the upstream and downstream pipe flanges and tighten it with flange bolts and nuts. See Figure 4.4 and follow the procedure below: 1. Insert two lower mounting bolts through the clearance holes in the upstream (or downstream) pipe flange. 2. Install a packing next to the upstream (or downstream) flange face and the other packing next to the downstream (or upstream) pipe flange.
6 F 8 A 0 9 3 4 Table 4.1 Bolt length and Nut tightening torque Meter size ANSI class 150 ANSI class 300 Through Bolts Through Bolts Tightening Tightening torque torque Dia- Length DiaLength P.C.S P.C.
6 F 8 A 0 9 3 4 4.3 Piping Connections (1) Required Pipe Length If various joints are used upstream of the detector outlet, the straight pipe length as shown in Table 4.2 is required. Table 4.2 Required straight pipe length on the upstream side L=5D L=10D (5) Other valves (not fully opened) (1) 90°bent L L (2) Tee L (3) Diffuser L (4) Fully opened sluice valve L L: Required straight pipe length—straight pipe length plus half length of the detector.
6 F 8 A 0 9 3 4 (2) Pipe Orientation The detector may be installed in horizontal, vertical or sloping pipe runs as shown in Figure 4.5. However, except for horizontal installation, fluid should flow from lower to upper directions. See Figure 4.5. Flow direction (b) Detector (a) Horizontal pipe installation (b) Vertical pipe installation (c) Sloping pipe installation (c) (a) Ground surface Figure 4.
6 F 8 A 0 9 3 4 (3) Flow Direction Install the detector in accordance with the flow direction arrow on the detector. See Figure 4.7. If the actual flow runs opposite to the specified flow direction, the following display and output appears. For single range measurement, ・LCD display: Instantaneous flow rate ------------- indicates negative values, Totalized flow ------------------------ no counts added. ・Outut: Current output ------------------------ 4.
6 F 8 A 0 9 3 4 4.4 Grounding CAUTION Do not wire cables and replace parts when power is supplied. DON’T Do not work on piping and wiring with wet hands. Wiring work and replacing parts in the power-on state may cause electric shock. Wet hands may result in electric shock. DON’T Ground as shown in Figure 4.10. Make the grounding wire as short as possible. Use grounding wire material of IV wire 5.5mm2 or more. Do not share a grounding wire with other instruments where grounding current may flow.
6 F 8 A 0 9 3 4 5. Wiring Notes on wiring WARNING DO NOT DISCONNECT WHILE CIRCUIT IS LIVE UNLESS LOCATION IS KNOWN TO BE NONHAZARDOUS. Live part of electric circuit or a high temperature department can cause explosion. DON’T Do not activate circuits while assembly of all components is not over. Protective performance degradation for hazardous location can cause explosion.
6 F 8 A 0 9 3 4 CAUTION Install a switch and fuse to isolate the LF516/LF546 from mains power. Power supply from mains power can cause electric shock or circuit break-down. Turn off mains power before conducting wiring work. Wiring while power is applied can cause electric shock. Do not work on piping and wiring with wet hands. Ground the LF516/LF546 independently from power equipment.
6 F 8 A 0 9 3 4 CAUTION (1) Select the cable run location so they are away from electrical equipment (motors, transformers, or radio transmitters) which causes electromagnetic or electrostatic interference. (2) Deterioration of flowmeter circuit insulation occurs if the converter interior or cable ends get wet or humidified. This in turn causes malfunction of flowmeter or noise problems. Avoid a rainy day if the flowmeter is to be installed outdoors.
6 F 8 A 0 9 3 4 5.2 External Device Connections and Grounding The terminal board connections of LF516/LF546 Flowmeter are shown in Figure 5.1. Proceed with wiring as described in Section 5.4, “Wiring Procedure.” NOTE: • When 3-core power cabel is used, do not ground from the external grounding terminal.(Perform grouding at the receving side only). • Only when a 2-core power cable is used, perform grounding from the external grounding terminal. Power cable (CVV) * For a 2-core cable, L1 and L2 only.
6 F 8 A 0 9 3 4 5.3 Notes on Wiring Notes on Instrumentation-Converter Wiring • To avoid 2-point grounding, ground the shield of output cable basically at the receiving side. • Use a grounding wire of IV wire 5.5mm2 or more. The size of the external grounding terminal screws is M4. Do not share a grounding wire with other instruments where grounding current may flow. (An independent grounding is preferable.) • Power cable When a 3-core cable is used: Ground with the FG terminal.
6 F 8 A 0 9 3 4 5.4 Wiring IMPORTANT The cable connections are not provided in the conduit port of this apparatus. Please prepare yourself for the cable connections which could be used in Division2 hazardous locations. CAUTION Do not wire cables and replace parts when power is supplied. DON’T Do not work on piping and wiring with wet hands. Wet hands may result in electric shock. Wiring work and replacing parts in the power-on state may cause electric shock. DON’T 5.4.
6 F 8 A 0 9 3 4 5.4.2 Cable Connection Connect and install the terminal-treated cables to the terminal block by the following procedure. *Connect the cables to the terminal block securely. A loose connection may cause incorrect measurement. After connecting a cable, try to pull it to check whether it has been connected securely. Referring to Section 5.2 "External Device Connections and Grounding", connect each cable to the terminal block.
6 F 8 A 0 9 3 4 5.5 Digital I/O Connections Digital I/O terminals consist of contact output terminals (DO1 and DO2), voltage signal input terminal (DI), and signal common terminal (COM). Each terminal (DO1, DO2 and DI) is isolated from internal circuits. Terminal (COM) is the signal common for the other three terminals (DO1, DO2 and DI). Functions can be assigned for each terminal with the LCD control keys. See Chapter 10, “Digital I/O Functions.
6 F 8 A 0 9 3 4 6. Operation CAUTION Do not touch the terminal board when power is supplied. Touching the terminal board when power is supplied can cause electric shock. Do not touch the main body when high temperature fluid is being measured. The fluid raises the main body temperature and can cause burns. DON’T DON’T 6.
6 F 8 A 0 9 3 4 Note 1: If the detector pipe is not filled with the fluid to be measured, the flow rate will be indefinite and unable to be measured. Before using the flowmeter, be sure to fill the detector pipe the fluid to be measured. 6.2 Zero Adjustment To conduct zero adjustment of the flowmeter, the fluid in the detector pipe must be held still. There are three different ways to start the zero adjustment: (1) Pressing a combination of control keys for the model with LCD display See 8.2.
6 F 8 A 0 9 3 4 7. LCD Display and Controls 7.1 Name and Function of Each Part of LCD Display The LDC display and infrared switches (hereafter, called "control key") in front of the converter allows you to view or set various constants such as measured values and parameters. Control key (Control panel) LCD Display Figure 7.
6 F 8 A 0 9 3 4 ● LCD electronically rotatable display 8-line × 14-character liquid crystal display. The backlit display provides an easy-to-read indication even under poor lighting conditions. Instantaneous flow rates or totalized flow in the measurement mode or configuration parameters in the setting mode can be displayed. (Number of LCD display dots: 128 x 128 dots) ① ② ① Measured Value Display 1 Displays a measured value of the type the operator has selected.
6 F 8 A 0 9 3 4 ● Setting switch The control keys allow you to perform converter control and setting, without opening the converter housing. These three controls keys function differently depending on the current display screen. The functions of these control keys are displayed on the display screen. In this product, the display method can be changed according to the converter installation direction.
6 F 8 A 0 9 3 4 7.2 Display Format In the measurement mode, the measured data is displayed using the menu items set by the Display 1 (DSPL1) and Display 2 (DSPL2). (For display settings, see 8.2.6 "Display Setting.") 1. Flow rate / Flow velocity display Numeric value･･･7 digits maximum including a decimal point are displayed. (Up to 9999999) 4 significant digits (for the set span) Unit･･･ 7 digits maximum are displayed. Flow direction･･･In the case of reverse direction, “−”is displayed.
6 F 8 A 0 9 3 4 Note 1: Totalized flow volume and totalized difference flow volume are displayed to the least significant digit of the set count rate. (Example1) When the count rate is 0.0001 m3: When the measurement object flows through 0.0001(m3), inside counter counts 1. Because inside counter is 8 digits at the maximum, the maximum of totalized flow is 9999.999(m3). When inside counter exceeds the maximum, inside counter return to 0, and continue totalization.
6 F 8 A 0 9 3 4 5. Percent display Numeric value･･･Within the range of +125.0% to −125%, displayed to the decimal place of 0.1%. - 1 2 5 . 0 % Unit･･･ "%" fixed. * If the value goes out of the display range, an error message appears. 6. Flow rate (When custom unit is selected) - 1 0 . 0 0 * X X X / Y Y Y 7. Numeric value･･･ 7 digits maximum including a decimal point are displayed.
6 F 8 A 0 9 3 4 8. Bar graph display Bar graph can be set only for Display 2. 0 100 Graph･･･ The measured value is displayed in bar graph. The left side of the graph is RL (Range Low limit) and the right side of the graph is RH (Range High limit). Scale marks are displayed in increments of 25% inside the graph. Range･･･ The range number currently used is displayed.
6 F 8 A 0 9 3 4 7.3 Basic operations 7.3.1 Mode Change The converter provides the setting mode and calibration mode as well as the measurement mode. To change the mode to the setting mode or to the calibration mode, push the SET switch. To return to the measurement mode, push the ESC switch from each menu. ● Measurement mode: Mode to perform flow measurement. Flow rate or volume of process fluid is displayed and outputted. The flowmeter first goes to this mode when power is turned on.
6 F 8 A 0 9 3 4 ○Flow of mode change Note: When the screen is switched, let your finger off the switch. If you keep pushing, the mode returns to the measurement mode. Measurement mode 1.000 Hold down only the center switch for 3 seconds or longer. (Note) m/s OK * (L) indicates that you can hold down the switch longer. * indicates that you must hold down the switch longer.
6 F 8 A 0 9 3 4 ○ Pulse output setting mode This mode is used to perform continuous parameter settings (automatic operation) regarding pulse outputs. When these parameters are set, pulse output is ready to send out. MENU SEL BASIC DETAILED PREVIEW ZERO ADJ PLS SET (L) ESC ▼ 0.00000 PLS OUT PLS SET m (L) ▼ PLS WID CNT RATE DO1 FUNC (L) ▲ (L) ▲ PLS MODE =MANUAL 3 000.0 MANUAL ms (L) ▲ (L) (L) PLS MODE =AUTO * (L) indicates that you can hold down the switch longer.
6 F 8 A 0 9 3 4 ○ Explanation about mode change The converter usually works continuously in the measurement mode. If you want to set parameters or perform calibration or adjustment, you have to go to the setting mode. To enter the setting mode, push the center switch for 3 seconds or more in the measurement mode. When you push the switch for 3 seconds or more, the display unlock screen appears.
6 F 8 A 0 9 3 4 ○ Operation timeout function If no operation is made for one minute or more while the converter is in the setting mode, the mode automatically returns to the measurement mode unless the parameters are displayed on the screen. A:DETECTOR 1 EXC CUR 2 SIZE 3 EXC FREQ 4 FLOW DIR 5 EXIT Menu screen When no operation is made for 1 minute, the mode automatically returns to the measurement mode. ESC EXC CUR 0.
6 F 8 A 0 9 3 4 Switch operation Display example A:DETECTOR 1 EXC CUR 2 SIZE 3 EXC FREQ 4 FLOW DIR 5 EXIT B:DISPLAY 1 DSPL1 2 DSPL2 3 CS VAL 4 CS UNIT 5 EXIT B:DISPLAY 1 DSPL1 2 DSPL2 3 CS VAL 4 CS UNIT 5 EXIT Description Pushing from the menu configuration selection screen takes you to the menu screen. The cursor is positioned at the function display ([A: DETECTOR] in this example). * This screen is an example when the DETAILED menu is selected.
6 F 8 A 0 9 3 4 Switch operation R1 Display example Description Push to select the item you want to check or change. The screen changes and the currently set item appears for you to check. Pushing ESC returns you to the menu screen. 10.0000 m/s ESC R1 When you push , the cursor appears on the setting value and the screen is ready to change the setting value. 10.0000 m/s R1 Ready to change the setting value 10.0000 Pushing increments the number in the place where the cursor is positioned.
6 F 8 A 0 9 3 4 Switch operation R1 Display example 5.00000 m/s Description Pushing when data is temporarily set causes the data to be fixed and executed. After the data is set, the cursor disappears, enabling you to check the set value. ESC ESC C:RANGE 1 R TYPE 2 R1 3 R2 4 R3 5 R4 6 R HYS 7 EXIT Pushing screen. ESC returns you to the menu ESC C:RANGE 1 R TYPE 2 R1 3 R2 4 R3 5 R4 6 R HYS 7 EXIT EXIT OK? O K N O 5.000 m/s O K 12.
6 F 8 A 0 9 3 4 7.4 Configuration Items Selection Table How to check or change each constant of the converter is shown in the table below. Details of each item are described in the setting items (A to R) of Chapter 8, "Parameter Settings." ○ Basic configuration (when menu configuration is BASIC) When you select "BASIC" in the menu configuration screen, the menu to check or change each constant is executed as follows.
6 F 8 A 0 9 3 4 ○ Detailed configuration When you select "DETAILED" in the menu configuration selection screen, the check/change menu for each constant setting is expanded as shown in the table below. Function A DETECTOR 1 2 3 Exciting frequency *3 4 Exciting Current *1 Meter size *3 Display1 Display2 Custom Value *1 Custom Unit *1 C RANGE Range type *1 Range1 *1 Range2 *1 Range3 *1 D FILTER Damping value Limit rate Limit time Returns meas.
6 F 8 A 0 9 3 4 7.5 Password input The converter provides the password function to prohibit some functions that affect the flow measurement from being set or adjusted. For the protected functions, see the menu configuration table on the previous page. * Password is a 3-digit number. If '000' is set for the password, the password input screen does not appear. If a password is set (other than '000' is set), you have to enter your correct password.
6 F 8 A 0 9 3 4 8. Parameter Settings 8.1 Parameter Setting Items To check or change each constant of the converter, first select the desired setting item described in 7.3.2 “Setting and Calibration.” Proceed as follows for settings in the setting mode. No. 8.2.2 8.2.3 8.2.4 8.2.5 8.2.6 8.2.7 8.2.8 Function item Exciting current Meter size Exciting frequency Flow direction Display1,2 Custom value Custom unit 8.2.9 Range (Span) 8.2.10 8.2.11 8.2.12 8.2.
6 F 8 A 0 9 3 4 8.2 Check/Change of Parameters 8.2.1 Menu Configuration Selection Screen Display example MENU SEL BASIC DETAILED PREVIEW ZERO ADJ PLS SET ESC You can select the kind of menu configuration. For menu items of configuration, see 7.4 "Setting and Calibration Items List." BASIC DETAILED PREVIEW ZERO ADJ PLS SET Only the basic parameters are displayed. Nothing is displayed in the field of other parameters. All parameters are displayed. Only reading of all parameters is possible.
6 F 8 A 0 9 3 4 8.2.2 Exciting Current Value The exciting current value can be checked/changed by the following procedures. Be sure to match the exciting current value with the value specified for the combined detector. Specifying any other value may cause an error. Shown below is an example of changing the exciting current value from 0.1900A to 0.2150A.
6 F 8 A 0 9 3 4 Switch operation STEP6 Display example EXC CUR 0.2150 A SET OK? ESC STEP7(=END) O K Description Pushing shows a message to confirm the setting is OK or not. If OK, push O K . If you need to redo the setting, push N O . Pushing ESC cancels the setting operation and exits the setting screen. N O EXC CUR 0.2150 When you push O K to “SET OK?” message, the set value is fixed. Then pushing ESC brings you back to the setting menu. If you push , you can A change the current value from 0.
6 F 8 A 0 9 3 4 Note 1:The meter size display loops as shown below: ① 25mm 40mm 50mm ② 1inch 1.5inch 2inch 80mm 3inch 100mm 4inch ② ① Note 2: When the meter size is changed, range unit and count rate will be forcefully changed as described below. If necessary, change these parameters again. Range unit Count rate m/s If the count rate goes out of the setting range when the meter size is changed, the count rate will be forcefully set to zero.
6 F 8 A 0 9 3 4 8.2.4 Exciting Frequency Proceed as follows to check the Exciting Frequency Switch operation Display example A:DETECTOR 1 EXC CUR 2 SIZE 3 EXC FREQ 4 FLOW DIR 5 EXIT Description Select "EXC FREQ" from the setting item selection menu. ESC EXC FREQ STEP1 200 Hz The currently set excitation frequency (200Hz in this example) appears. Then push * Pushing menu. ESC . ESC returns you to the setting 8.2.
6 F 8 A 0 9 3 4 Switch operation STEP1 Display example FLOW DIR NORMAL Description The currently set flow direction (NORMAL in this example) appears. Then push * Pushing ESC returns you to the setting menu. The switches at the bottom change. ( are shown.) At the same time, the cursor appears. (The item indicated by the cursor is highlighted.) ESC STEP2 FLOW DIR NORMAL STEP3 Then push . You can continue to change the setting item. Pushing changes the selection items.
6 F 8 A 0 9 3 4 COUNT: displays the totalized flow counts (up to 8 digits). RANGE: displays the range number being used for measurement (1 to 4). GPARH: displays the measured value (% value) in bar graph. In addition, the range number being used for measurement is also displayed. CUSTOM: displays the result obtained by multiplying m3/min by the custom coefficient. The details see 10.10 “Custom unit function”. Note 2: GRAPH display can be selected only for Display 2 screen.
6 F 8 A 0 9 3 4 /s /min /h /d For Display 2 unit setting, select DSPL2 from the setting menu. ● How to select the display digit setting When you select flow velocity or flow rate (custom unit is included), the screen automatically moves to the display digit setting screen. Using the display digit setting screen, you can change the decimal places used for the measured value in the measurement mode. Switch operation Display example DIGIT1 1.
6 F 8 A 0 9 3 4 For example, if the setting range is 10m/s and display digit setting is 1/100, the measured value will be displayed to the first decimal place. Setting range＝１０．００００ ｍ／ｓ One hundredth of maximum effective digits Maximum effective digits Likewise, when the setting range 1m/s and display digit setting is 1/100, the measured value will be displayed to the second decimal place. The numbers less than the displayed digits will be rounded.
6 F 8 A 0 9 3 4 Note: The setting item for the third unit (flow volume direction code) changes cyclically as shown below. B(bi-directional) F(forward direction fixed) D(difference flow rate) R(reverse direction fixed) For Display 2 setting, select DSPL2 from the setting menu. 8.2.7 Custom Coefficient Setting You can set the custom coefficient used when CUSTOM is selected for display setting or span setting. Custom coefficient can be set except 0.
6 F 8 A 0 9 3 4 Switch operation STEP4(=END) Display example CS VAL 2.25000 SET OK? ESC O K N O Description Pushing shows a message to confirm whether the setting is OK or not. If OK, push O K . If you need to redo the setting, push N O . Pushing ESC cancels the setting operation and exits the setting screen. Note: The custom coefficient setting precision is 5 digits.
6 F 8 A 0 9 3 4 Switch operation STEP4(=END) Description Pushing when the cursor is positioned on the 7th character shows a message to confirm whether the setting is OK or not. If OK, push O K . If you want to redo the setting, push N O . Pushing ESC cancels the setting operation and exits the setting screen.
6 F 8 A 0 9 3 4 ● Span You can set the span for actual flow rate or flow velocity. (1) Setting range The span can be set within 0.5 m/s to 10 m/s in terms of flow velocity. If you try to set the span outside of this range, either high limit or low limit error message appears: HIGH OVER SPEC (if the set value exceeds 10 m/s) LOW OVER SPEC (if the set value is less than 0.1 m/s) Try again to set the span within the range.
6 F 8 A 0 9 3 4 ● Range hysteresis The hysteresis is the dead band used when multiple ranges are switched. You can set the hysteresis within the range of 0 to 25% in increments of 0.1%. The hysteresis is set only when automatic selection of multiple ranges is used. ● Setting sequence of span (range) The following is the setting sequence for span (range).
6 F 8 A 0 9 3 4 Switch operation ESC Display example C:RANGE 1 R TYPE 2 R1 3 R2 4 R3 5 R4 6 R HYS 7 EXIT Pushing menu. Description returns you to the setting ESC ESC ● Changing the range type The range type should be set before changing the span. The following is an example to change the range type from Single range (SINGLE) to Bidirectional automatic selection of multiple ranges (2F-2R).
6 F 8 A 0 9 3 4 Switch operation STEP5(=END) Display example R TYPE 2F-2R SET OK? ESC N O O K Description When you push , a message appears to confirm whether the setting is OK or not. If OK, push O K . If you want to redo the setting, push N O . Pushing ESC cancels the setting operation and exits the setting screen. ● Changing the span You can set the span value for each range. The following is an example to change the span of Range 1 from 2.0 m/s to 100 L/min.
6 F 8 A 0 9 3 4 Switch operation STEP6 R2 Description to change the number of the Display example Push digit. Push 136.000 to move the digit. L/min STEP7(=END) R2 When you push , a message appears to confirm whether the setting is OK or not. If OK, push O K . If you want to redo the setting, push N O . 100.000 L/min SET OK? ESC O K Pushing ESC cancels the setting operation and exits the setting screen.
6 F 8 A 0 9 3 4 Switch operation STEP3 Display example R HYS 05.0 Description Push to move the cursor to the desired digit and push to change the number of the digit. % STEP4(=END) R HYS When you push , a message appears to confirm whether the setting is OK or not. If OK, push O K . If you want to redo the setting, push N O . 05.0 SET OK? ESC % O K N O Pushing ESC cancels the setting operation and exits the setting screen. Note: If you try to set a value exceeding 25.
6 F 8 A 0 9 3 4 Switch operation STEP2 Display example DAMPING 05.0 At the same time, the cursor appears. S STEP3 Description The switches at the bottom change. ( are shown.) DAMPING Push to move the cursor to the desired digit and push to change the number of the digit. 10.0 S STEP4(=END) DAMPING When you push , a message appears to confirm whether the setting is OK or not. If OK, push O K . If you want to redo the setting, push N O . 10.
6 F 8 A 0 9 3 4 ● Changing the rate-of-change limit The following is an example to change the rate-of-change limit value from 10.0% to 15.0%. Switch operation Display example D:FILTER 1 DAMPING 2 LIM RATE 3 LIM TIME 4 EXIT Description Select "LIM RATE" from the setting item selection menu. ESC STEP1 LIM RATE The currently set value (10.0% in this example) appears. 10.0 Then push % . ESC STEP2 LIM RATE The switches at the bottom change. ( are shown.) 10.
6 F 8 A 0 9 3 4 8.2.12 Low Cutoff The low cutoff is the function to set the current output to zero forcefully if the flow rate is equal to or less than the low cutoff value set near 0%. The low cutoff value can be set within the range 0 to 10% in increments of 0.1%. You can check or change the low cutoff value as described below. The following is an example to change the low cutoff value from 1.0% to 3.0%.
6 F 8 A 0 9 3 4 8.2.13 Display Low Cutoff When low cutoff is set in 8.2.12 “Low Cutoff,” this function determines whether to use the low cutoff processing for displayed values. You can select the display low cutoff setting from the items in the table below. ● Display low cutoff setting function Selection items Displayed values LINEAR Low cutoff processing is not used for displayed values. LOW CUT Displayed values are processed with low cutoff.
6 F 8 A 0 9 3 4 Switch operation STEP4(=END) Display example DSPL SET LOW CUT SET OK? ESC N O O K Description When you push , a message appears to confirm whether the setting is OK or not. If OK, push O K . If you want to redo the setting, push N O . Pushing ESC cancels the setting operation and exits the setting screen. Note: The measured value sent from the converter through communications is the value processed with display low cutoff. 8.2.
6 F 8 A 0 9 3 4 8.2.15 Manual Zero Adjustment This function is used to perform zero adjustment simply by comparing the output value of the converter with the process value of other instruments without stopping the process of measurement. If zero adjustment described in 8.2.14, “Still Water Zero Adjustment” can be performed, this manual setting is not needed.
6 F 8 A 0 9 3 4 Switch operation STEP3 Display example MANUAL -002.5 Description Push to move the cursor to the desired digit and push to change the symbol or number of the digit. % STEP4(=END) MANUAL Pushing shows a message to confirm whether the setting is OK or not. If OK, push O K . If you need to redo the setting, push N O . -002.5 % SET OK? ESC O K N O Pushing ESC cancels the setting operation and exits the setting screen.
6 F 8 A 0 9 3 4 Switch operation STEP1 Display example ALM 4-20 UNDER 3mA Description The currently set value (UNDER 3.0mA in this example) appears. Then push * Pushing menu. ESC ALM 4-20 STEP2 4mA ALM 4-20 4mA SET OK? ESC O K returns you to the setting Then push . You can continue to change the setting item. Push to change the selection items. : Selected item is scrolled up. : Selected item is scrolled down. When the desired item is selected, push to set the item temporarily.
6 F 8 A 0 9 3 4 You can check or change the output low limit as described below. The following is an example to change the output low limit value from 4.0mA to 2.4mA. Switch operation Description Display example G:4-20mA Select "LOW LIM" from the setting item 1 ALM 4-20 selection menu. 2 LOW LIM 3 EXIT ESC STEP1 LOW LIM The currently set value (4.0mA in this example) appears. 4.0mA Then push *Pushing menu. ESC STEP2 LOW LIM LOW LIM 2.4mA SET OK? ESC O K returns you to the setting Then push .
6 F 8 A 0 9 3 4 ●Digital output functions Selection items Digital output functions NO USE Not used H ALM High alarm output L ALM Low alarm output HH ALM High-High alarm output LL ALM Low-Low alarm output RNG SIG1 Range output No. 1 RNG SIG2 Range output No.
6 F 8 A 0 9 3 4 Switch operation STEP2 Display example DO1 FUNC H ALM Then push . You can continue to change the setting item. Push to change the selection items. : Selected item is scrolled up. : Selected item is scrolled down. When the desired item is selected, push to set the item temporarily. When you push , a message appears to confirm whether the setting is OK or not. If OK, push O K . If you want to redo the setting, push N O .
6 F 8 A 0 9 3 4 ●Digital input control signal You can select the detective level of the digital input, as shown below, to control the totalizer and pulse output.
6 F 8 A 0 9 3 4 Switch operation STEP4(=END) Display example DI FUNC CNT ST/SP SET OK? ESC O K N O Description When you push , a message appears to confirm whether the setting is OK or not. If OK, push O K . If you want to redo the setting, push N O . Pushing ESC cancels the setting operation and exits the setting screen. 8.2.
6 F 8 A 0 9 3 4 ● For pulse width setting mode, you can select either AUTO or MANUAL. Depending on this setting, the pulse width setting varies as shown in the table below: Selection item Pulse width value to be set After the count rate is set, the pulse width is automatically set AUTO to 40% of the period of pulse frequency at 100% output. Even after the count rate is set, the pulse width is not changed.
6 F 8 A 0 9 3 4 You can check or change the count rate and pulse width as described below. The following is an example to change the count rate from 0.01m3 to 0.9 L. Switch operation Description Display example CNT RATE The currently set count rate (0.01m3 in this STEP1 example) appears. 0.01000 Then push m3 . ESC STEP2 CNT RATE The switches at the bottom change. ( are shown.) At the same time, the cursor appears. 0.
6 F 8 A 0 9 3 4 Note 1: The units of count rate change cyclically as shown below: m³ L mL bbl gal pt qt Note 2: After the count rate is set, related parameters are automatically set under the following conditions: (1) Pulse width When the pulse width setting mode is AUTO: Pulse width will be automatically set according to the count rate.
6 F 8 A 0 9 3 4 You can check or change the preset count as described below. The following is an example to change the preset count value from 500 (count) to 1000 (count). Switch operation Description Display example K:PRESET C Select "PRST VAL" from the setting item 1 PRST VAL selection menu. 2 OUT MODE 3 EXIT ESC STEP1 PRST VAL The currently set value (500 in this example) appears. 00000500 Then push . ESC STEP2 PRST VAL The switches at the bottom change. ( are shown.
6 F 8 A 0 9 3 4 8.2.22 Preset Mode The preset mode determines the function when the totalizer reaches the preset count. The present mode can be set from the items shown below. ●Preset mode Selection items Preset mode HOLD Holds the output value. 50ms PLS Outputs a one shot pulse of 50ms width. 500ms PLS Outputs a one shot pulse of 500ms width. Note: If you set the preset mode to "50ms PLS" or "500ms PLS", you need to set the preset count to 1, 2, 5, 25, 125 ×10n.
6 F 8 A 0 9 3 4 Switch operation STEP2 Display example OUT MODE HOLD STEP3 Then push . You can continue to change the setting item. Push to change the selection items. : Selected item is scrolled up. : Selected item is scrolled down. When the desired item is selected, push to set the item temporarily. When you push , a message appears to confirm whether the setting is OK or not. If OK, push O K . If you want to redo the setting, push N O .
6 F 8 A 0 9 3 4 Switch operation STEP2 Display example H SET OFF STEP3 Then push . You can continue to change the setting item. Push to change the selection items. : Selected item is scrolled up. : Selected item is scrolled down. When the desired item is selected, push to set the item temporarily. When you push , a message appears to confirm whether the setting is OK or not. If OK, push O K . If you want to redo the setting, push N O .
6 F 8 A 0 9 3 4 Switch operation STEP3 Display example H VAL +103.0 Description Push to move the cursor to the digit you want to change and push to change the number of the digit. % STEP4(=END) H VAL When you push , a message appears to confirm whether the setting is OK or not. If OK, push O K . If you want to redo the setting, push N O . +103.0 SET OK? ESC O K N O Pushing ESC cancels the setting operation and exits the setting screen.
6 F 8 A 0 9 3 4 ●Changing the Mag-Prover’s self-diagnosis function setting The following is an example to change the Mag-Prover’s self-diagnosis setting from OFF to ON. Switch operation Description Display example N:SELF CHK Select "SELF CHK" from the setting item 1 EMPTY selection menu. 2 SELF CHK 3 CONV ALM 4 EXIT ESC STEP1 SELF CHK The current setting (OFF in this example) appears. OFF Then push * Pushing ESC returns you to the menu screen. The switches at the bottom change. ( are shown.
6 F 8 A 0 9 3 4 Operation when fixed output is set to ON Current output Output is the fixed current output value. Pulse output Output is the fixed pulse rate pulse signal. Digital output other than Status in hold pulse output Display Display 2 screen: Used to indicate the fixed output (Note) Display example: * 3 0 0 0 P P S * * 2 0 .
6 F 8 A 0 9 3 4 Switch operation STEP4 Display example FIX SET ON SET OK? ESC N O O K CUR VAL STEP5 mA CUR VAL STEP6 Pushing ESC cancels the setting operation and exits the setting screen. The screen automatically changes to the fixed current value setting screen. The currently set value (4.0mA in this example) appears. 04.0 O K Description When you push , a message appears to confirm whether the setting is OK or not. If OK, push O K . If you want to redo the setting, push N O .
6 F 8 A 0 9 3 4 Note 1: If you try to set a value outside of the range, 2.4mA or 24mA (in the case of fixed current output) or 3000pps (in the case of fixed pulse output) will be forcibly set. Note 2: The pulse width set in Section 8.2.20 is used for fixed pulse output. The pulse width must not be greater than 40% of the period of the fixed output set frequency. However, if the setting exceeds 1000pps, the pulse width automatically will be set to 40% of the period of the fixed output set frequency.
6 F 8 A 0 9 3 4 * However, if a wrong password is entered when the mode is changed from the measuring mode to the setting mode, *** appears and the password cannot be checked. Switch operation Description Display example PASSWORD The currently set password is displayed as *** and the password cannot be checked. *** ESC ●Changing the password The following is an example to change the password from 123 to 453.
6 F 8 A 0 9 3 4 8.2.27 LCD Adjustment This section describes how to set the LCD density adjustment value for the converter display. The LCD density can be set in 5 levels. LCD density adjustment level LCD density 1 2 3 Light 4 5 Dark The LCD density adjustment value is set to "3" when shipped from the factory. The display of the LCD gradually becomes thinner over time. If the display is getting difficult to read, you need to adjust the density level using this parameter.
6 F 8 A 0 9 3 4 8.2.28 Switch Position Setting The switch position of the converter display can be set. The position setting of the switch enables the display remains the same in orientation, regardless of which direction relative to the piping the converter is installed. You can set the switch position by selecting one from four positions described below. (1) Switch position: TOP The infrared switches are located at the top with the front facing you.
6 F 8 A 0 9 3 4 The following is an example to change the switch position setting from BOTTOM to TOP. Switch operation Description Display example P:OTHERS Select "SW POSN" from the setting item 1 PASSWORD selection menu. 2 LCD ADJ 3 SW POSN 4 EXIT ESC STEP1 SW POSN The current setting (BOTTOM in this example) appears. BOTTOM Then push * Pushing ESC returns you to the menu screen. The switches at the bottom change. ( are shown.) At the same time, the cursor appears.
6 F 8 A 0 9 3 4 8.3 Parameter initial settings list Unless otherwise specified, the default values for each parameter shown below are set when shipped from the factory: Parameter names Default value Excitation frequency (*1) Flow direction NORMAL Display 1 gal/min Display 2 COUNT B Display digit setting 1/1000 (for Display 1 and Display 2) Custom coefficient 1.0 Custom unit “ CUSTOM”(Head of character string is blank ) Range type Single Range 1 300 gal/min Ranges 2 to 4 0 gal/min Hysteresis 3.
6 F 8 A 0 9 3 4 Setting values for each meter size Range 1 (SI unit) Meter Size Ex. Freq (mm/inch) (Hz) (m3/h) (m/s) 25 / 1 40 / 1.5 50 / 2 80 / 3 100 / 4 400 200 200 200 100 6 15 25 60 100 3.395 3.316 3.537 3.316 3.537 Range 1 (English unit) (gal/min) (ft/s) Count rate (gal) 75 175 300 650 1000 31.625 28.826 31.625 26.766 26.
6 F 8 A 0 9 3 4 9. Mag-Prover-Calibration 9.1 Calibration Items When you check or calibrate the converter or check the excitation current, you have to change the mode to the calibration mode. You can check or change the zero and span of the converter and the excitation current value as described below. However, calibration is already performed when shipped from the factory. Do not perform change calibration unless it is specificity required. Items 9.2.1 9.2.2 9.2.3 9.2.
6 F 8 A 0 9 3 4 9.2 Calibration Using Mag-Prover’s Built-In Signal Source 9.2.1 0 % Flow Rate Calibration (Zero Calibration) Using Mag-Prover’s internal calibration circuit, 0% flow rate calibration (hereafter called zero calibration) can be performed. ●Zero point check / calibration Switch operation Display example R:CAL 1 CAL 0% 2 CAL 50% 3 CAL 100% 4 EXC DSPL 5 EXIT Description Select "CAL 0" from the setting item selection menu.
6 F 8 A 0 9 3 4 9.2.2 50 % Flow Rate Calibration Using Mag-Prover’s internal calibration circuit, 50% flow rate calibration can be performed. For calibration procedure, see the calibration procedure for 0% flow rate. (For 50% flow rate calibration, select "CAL 50" from the setting menu.) 9.2.3 100 % Flow Rate Calibration (Span Calibration) Using Mag-Prover’s internal calibration circuit, 100% flow rate calibration can be performed.
6 F 8 A 0 9 3 4 10. Functional Description The LF516/LF546 Electromagnetic Flowmeter is equipped with two contact output terminals (digital output terminals (DO1, DO2)) and one external input terminal (digital input (DI), optional), enabling you to use various functions, such as pulse output and alarm output. The following functions are provided using the digital I/O functions are described below.
6 F 8 A 0 9 3 4 10.
6 F 8 A 0 9 3 4 10.2 Totalizer and Pulse Output To use the totalizer and pulse output for external use, proceed as follows. Count rate and Pulse Width Setting Set the flow volume per count (pulse) (count rate) and the pulse width. See 8.2.20, “Count rate, Pulse Width Setting Mode and Pulse Width.” * The count rate can be set within the range below in reference to the setting range: 3.6 (pulse/s) to 10800000 pulse/h (1/1000 pulse/s to 3000 pulse/s) (Note 1) * The pulse width can be set within the range 0.
6 F 8 A 0 9 3 4 Note 1: Example of count rate setting range: The count rate can be set within the range from the minimum value (36000000 pulse/h) to the maximum value (3.6 pulse/h). (Example) In the case of range 108m3/h (0.03m3/s), Minimum value (for 10800000 pulse/h): 108 (m3/h) / 10800000 (pulses/h) = 0.00001m3 = 0.01 L (liter) Maximum value (for 3.6 pulse/h): 108 (m3/h) / 3.6 (pulses/h) = 30m3 Note 2: Example of pulse width setting range The pulse width can be set within the range 0.
6 F 8 A 0 9 3 4 Totalizer Operation ●Operation using the operation switches You can start, stop or clear the totalizer as described below. Switch operation Display example Description PUSH SW Mode change screen CNT: CNT CTRL SET: SET MODE ESC SET CNT CNT CTRL When you push CNT in the measurement mode, the screen moves to the totalizer 12345678 control screen. CNT Totalized flow count (both directions) FRD ■ appears automatically on this screen. In addition, the switches CLR ESC ( CLR are shown.
6 F 8 A 0 9 3 4 Note 1:Since the flow volume direction code is B (Bidirectional forward/reverse automatic selection), •When you select forward/reverse multi-range, forward direction totalized value (count value) is displayed for operation in the forward direction range, and reverse direction totalized value (count value) is displayed for operation in reverse direction range. Note 2:If you reset the totalizer, flow counts for both directions will be cleared to zero at the same time.
6 F 8 A 0 9 3 4 10.3 Multi-range Function Four types of multiple ranges shown below can be selected by setting the range type: (1) Unidirectional flow, automatic selection of multiple ranges (2) Bidirectional flows, automatic selection of multiple ranges (3) Unidirectional flow, multiple ranges selected by external signal (4) Bidirectional flows, multiple ranges selected by external signal Proceed as follows to use the multi-range function. Range setting Refer to 8.2.
6 F 8 A 0 9 3 4 Output performance of multi-range functions 14. Automatic selection of unidirectional flow multi-range with an internal signal Output (%) 125 Range 1 100 Hysteresis (0~25%) Range 4 Range 3 20mA Range 2 0 4mA Reverse Range output No.1 Range output No.2 0 Forward direction ON OFF ON Flow rate direction ON OFF OFF ・ Current output when fluid flows in the reverse direction is the value set for the output low limit (any one of 2.4/3.2/4.0mA).
6 F 8 A 0 9 3 4 (2) Automatic selection of bidirectional flows multi-range with an internal signal output (%) 125 100 Range 3 Range 1 20mA Range 2 Range 4 Hysteresis Hysteresis 0 4mA Reverse direction Range output No.1 Range output No.2 0 OFF Forward direction ON ON OFF ON OFF Reverse to Forward direction change ■ Forward to Reverse direction change Output Output ←Low cutoff x 1.25 ←Low cutoff x 1.25 Low cutoff x 1.25→ Low cutoff x 1.25→ 4mA 0 0 -(Low cutoff x 1.
6 F 8 A 0 9 3 4 (3) Remote selection of unidirectional flows multi-range with an external signal Output (%) 125 100 Range 2 Range 1 0 Reverse direction External signal Range output No.1 4mA 0 Forward direction H level input ON Flow rate L level input OFF • Current output when fluid flows in reverse direction is the output low limit setting (any one of 2.4 / 3.2 / 4.0mA).
6 F 8 A 0 9 3 4 (4) Remote selection of bidirectional flows multi-range with an external signal Output (%) 125 Range 3 Range 1 100 Range 2 ↓ Range 4 ↓ 0 Reverse direction External signal Range output No.1 Range output No.2 4mA 0 L level OFF H level ON Forward direction H level ON ON L level OFF OFF Reverse to Forward direction change ■ Forward to Reverse direction change Output Output ←Low cutoff x 1.25 ←Low cutoff x 1.25 Low cutoff x 1.25→ Low cutoff x 1.
6 F 8 A 0 9 3 4 10.4 Flow Rate High/Low, High-High/Low-Low Alarm Output To use the flow rate high/low alarm or high-high/low-low alarm output, follow the procedure below. High / Low alarm setting Refer to 8.2.23, “Flow Rate High/Low Alarm and High-High/Low-Low Alarm” and set the high alarm and/or low alarm to ON and set the limit value for high and/or low alarm. For alarms not used, set its setting to OFF. High-High / Low-Low alarm setting Refer to 8.2.
6 F 8 A 0 9 3 4 High and Low Limit Alarm Output Performance (Same as for High High/Low Low limit Alarm Output) • Single range performance Output (%) High limit value Hysteresis 2.5% Hysteresis 2.5% Low limit value Alarm output Alarm output Alarm output Time • Multi-range performance In an example shown below, a low limit alarm is set for the Range 2 and a high limit alarm is set for the Range 1. Output (%) Range 1 High limit value Hysteresis 2.5% Hysteresis 2.
6 F 8 A 0 9 3 4 10.5 Preset Count Function When the totalizer count reaches the preset count value, the converter outputs a contact signal. Proceed as follows to use the preset count function. Totalizer setting Refer to 10.2 “Totalizer and Pulse Output” to set necessary settings for totalizer. Preset count, Preset count function setting • Refer to 8.2.21, “Preset Count” to set the desired preset count. • Refer to 8.2.22, “Preset Mode” to select the desired preset output function.
6 F 8 A 0 9 3 4 Preset count output performance (1) The following is an example for totalizer flow counts output in which the totalizer is reset with an external signal (when preset output status level hold mode is set (contact ON)). H level input Counter Reset/Start signal (DI detective level is H).
6 F 8 A 0 9 3 4 (2) The following is an example for totalizer flow counts output in which the totalizer is reset with an external signal (when one-shot pulse output mode is set). Counter Reset/Start signal (DI detective level is L). H level input L level input Totalizer flow counts Preset point 0 Counter reset Counter reset Counter start Preset point output For the totalizer is reset to zero, the preset output goes OFF.
6 F 8 A 0 9 3 4 (3) The following is an example for one-shot pulse output. Setting preset count:100 200 100 Totalizer flow counts 0 ON Preset point output OFF For it takes the time set pulse width from the output goes OFF Input/Output signal time chart * Preset output goes ON when the count value exceeds the preset value of 100 and the preset output goes OFF when its width reaches the set pulse width.
6 F 8 A 0 9 3 4 Note: When the one-shot pulse output function is selected, if its pulse width is large compared with the update period of the preset value. The output stays ON. To make sure to output as one-shot pulse, set the preset value reach interval to be 2 signals or more of the pulse width setting value. Preset Pulse Width The Interval of that Totalizer reaches the Preset Point Example) Count rate:0.
6 F 8 A 0 9 3 4 10.6 Remote Zero Adjustment On-stream zero adjustment in a zero flow rate condition can be started with an external signal. To do this, set DI as a zero adjustment start signal. See 8.2.19, “Digital I/O” [Signal Input Timing] H level Zero adjustment start signal 10 seconds ▲ Zero adjustment start L level 20 seconds * The start signal must be set to H level first, then it must go to L level after the passage of more than 10 seconds but not more than 20 seconds, as shown above.
6 F 8 A 0 9 3 4 10.8 Converter Failure Alarm If any one of the following errors occurs in a self-diagnosis sequence, the converter issues an alarm using a contact output.
6 F 8 A 0 9 3 4 10.9 Multiple range high/low limit alarm function (option) The procedure to use multiple range high/low limit alarm is shown below. Range setting ・Set the range in accordance with 8.2.9 Span (range) in the following order. 1. Set the range type to “unidirectional flow, multiple ranges selected by external signal”. 2. Set Range 1 and Range 2 respectively.
6 F 8 A 0 9 3 4 Multiple range high/low limit alarm output Flow rate High limit Low limit High-high limit Low-low limit Time Multiple range DO1 High limit alarm output DO2 Multiple range Low limit alarm output DI range select signal Alarm output ON Alarm output ON Alarm output ON Alarm output ON Alarm output ON Large range (Range 1) Small range (Range 2) Note 1: Range changes to Small range when range select signal is H level, and to Large range in L level.
6 F 8 A 0 9 3 4 10.10 Custom unit function (1) Display of flow rate The procedure to display flow rate by the custom unit is shown below. Example : In the case of custom unit [dL(deciliter)/min]. Custom coefficient setting ・Set the custom coefficient in accordance with 8.2.7 “Custom Coefficient Setting”. Set the conversion coefficient from m3/min unit to the custom coefficient. In the case of dL/min, set 10000 that is the conversion coefficient of dL from m3.
6 F 8 A 0 9 3 4 (2) Span setting Setting of 8.2.7 “Custom Coefficient Setting” and 8.2.8 “Custom Unit Setting” is applied to the custom coefficient and unit same as (1)Display of flow rate. Example : In the case of custom unit [dL(deciliter)/min]. Custom coefficient setting ・Set the custom coefficient in accordance with 8.2.7 “Custom Coefficient Setting”. Set the conversion coefficient from m3/min unit to the custom coefficient.
6 F 8 A 0 9 3 4 Note1 : Even if the custom unit is selected, the current output does not change unless the span value is changed. R1 Display example Description In the case of span value = 2.00000 m3/min 2.00000 m3/min R1 20000.0 *dL/min R1 10000.0 *dL/min When custom unit dL/min is selected, the span value is displayed 20000 automatically based on the custom coefficient. Identification character “*” showing the custom unit is displayed at the head of custom unit.
6 F 8 A 0 9 3 4 11.Communications Function LF546 Electromagnetic Flowmeter converter uses the HART*1 protocol to transmit digital signals over the 4-20mA output line. The AF900 hand-held terminal is used to communicate with the LF546 using the HART protocol. Through remote operation, you can check or change the various parameters, calibrate the flowmeter or monitor the measurement value.
6 F 8 A 0 9 3 4 HHT connection cable and clips Converter terminal block HHT Figure 11.2 Connections to the Converter Unit 11.2 Procedure for Communications with HHT This section describes the HHT basic operation procedure for communications between the flowmeter and HHT. For details, refer to the HHT instruction manual. * The following procedure makes a commercially available PDA (OS: Windows Mobile) serve as a HHT.
6 F 8 A 0 9 3 4 11.3 Notes on Communications ● Current output load (1) Load resistance: 240 to 750 Ω (including the communications line resistance) (2) Load capacitance: 0.25μF maximum (including the communications line capacitance) (3) Load inductance:4mH maximum (including the communications line inductance) (The maximum cable length is approx. 2 km when CVV-S 1.25 mm2 cable is used under standard installation conditions.) ● Connection method Use a shielded cable (such as CVV-S) for wiring.
6 F 8 A 0 9 3 4 12. Self-Diagnosis and Alarms 12.1 Self-Diagnosis The converter has a self-diagnosis function to detect errors, such as setting error, I/O error or converter hardware failure, and shows the resulting error or alarm messages on Display 2 of the screen or on the hand-held terminal (HHT) through communications. The diagnosis messages and their corrective actions are described below.
6 F 8 A 0 9 3 4 ● High/low alarm, high-high/low-low alarm, empty pipe alarm One of the following messages appears if the flow rate reading goes out of the set range or an empty alarm is generated. If the high or low limit alarm ON/OFF status is set to OFF, its alarm function (high or low) is disabled. See 8.2, “Check/Change of Parameters.” LCD display Description Corrective action HIGH ALARM If high alarm is set, the flow rate reading has Take necessary actions for the exceeded the set value.
6 F 8 A 0 9 3 4 ● Converter diagnosis error The converter checks the internal system when power is turned on and generates an error if abnormality is found. If multiple errors are found, their messages will be displayed cyclically. Diagnosis items concerning the excitation circuit are detected using the internal ADC circuit. Thus, if the ADC error of No.6 occurs, No. 4 excitation cable and No. 5 excitation circuit errors cannot be detected correctly.
6 F 8 A 0 9 3 4 12.2 Output Status for Errors and Alarms Error indication ROM ERROR (Note 1) RAM ERROR Measured value Current output Totalization indication (4-20mA) pulse output − (Note 3) Stopped − (Note 3) Zero (Note 3) Stopped Zero (Note 3) Stopped Zero (Note 3) Stopped Zero (Note 3) Remarks After power-up, no measurement starts. Stopped After power-up, no measurement starts.
6 F 8 A 0 9 3 4 13. Maintenance and Troubleshooting WARNING Do not disconnect while circuit is live unless location is known to be nonhazardous. Live part of electric circuit or a high temperature department can cause explosion. DON’T Do not modify or disassemble the enclosure. Strength degradation and defects of enclosure can cause explosion. DON’T Do not use parts of other products. Protective performance degradation for hazardous location can cause explosion.
6 F 8 A 0 9 3 4 13.1 Maintenance Calibration The converter for electromagnetic flowmeter: LF61*F has a built-in internal calibration circuit that can be used to check the zero and span of the converter for the purpose of instrumentation maintenance, periodic inspection or re-verification of instrument calibration parameters. See Chapter 9, “Mag-Prover’s built-in Signal Source” Fuse The fuse can be taken out by unscrewing the cap of the fuse holder. Check that the fuse is not damaged.
6 F 8 A 0 9 3 4 13.2 Troubleshooting If a problem occurs while using the flowmeter, you may find the cause of the problem by a simple check. Please follow the flowmeter before you contact a serviceperson. 13.2.1 Flow rate is not indicated. START Are power supplies correct for each device? NO Use the correct power supply for each device. YES Are power and I/O cables installed correctly? NO Install the cables correctly. Refer to Chapter 5, “Wiring.
6 F 8 A 0 9 3 4 13.2.2 Flow rate indication is not correct. START Is the flow range correctly set? Set correctly. Refer to Chapter 8, “Configuration Parameter Setting.” NO YES Perform the zero adjustment. NO Is zero point correctly set? Refer to 6, “Operation” YES Is the excitation current value as stated on the flow direction tag? Set correctly. Refer to 8, “Configuration parameter setting” NO YES Is the inside wall of detector pipe contaminated? YES Clean the inside wall of the detector pipe.
6 F 8 A 0 9 3 4 13.2.3 Flow rate indication is not stable. START Is power supply voltage within the specified range? NO Use a power supply within the specified range. NO Connect each cable securely to the terminal board. YES Are cables connected? securely YES Is the flowmeter grounded with 100 Ω or less ground resistance? Ground the flowmeter with a copper braid or wire(5.5 mm² minimum) to a good earth ground (100Ω or less ground resistance).
6 F 8 A 0 9 3 4 13.2.4 When switch operation is unable START Does intense light shine on the control panel such as direct sunlight or reflected sunlight by window glass or metal sheet? YES Place a cover to block the light from surroundings, or cover the control panel by hand to block the light. YES Place a cover to block the light from surroundings, or cover the control panel by hand to block the light.
6 F 8 A 0 9 3 4 14. Principle of Operation The operating principle of the electromagnetic flowmeter is based on Faraday's Law of electromagnetic induction and it is designed to measure the volumetric flow rate of fluid. An insulated pipe of diameter D is placed vertically to the direction of a magnetic field with flux density B (see Figure 14.1).
6 F 8 A 0 9 3 4 15. Specifications 15.1 Flowmeter Specifications Overall Specifications Measurement range in terms of flow velocity: 0–0.5 m/s to 0–10 m/s System accuracy: when fluid conductivity is 0.1μS/cm or more Accuracy Flow rate as a percentage of range Span 0.5 to less than 1m/s Span 1.0 to 10 m/s 0 to less than 50% ±0.25%FS ± 0.5%FS 50 to 100% ±0.5% of rate Note: The accuracy above is measured under standard operating conditions at Toshiba's calibration facility.
6 F 8 A 0 9 3 4 ■LF516 Detector Specifications Meter size: 25, 40, 50, 80, 100mm Fluid pressure: -0.1 ~ 2MPa Connection flange standard: See Table 15.2 Type Specification Code Heat shock resistance – for ceramic tube detector Cooling: ΔT ≦ 100℃/0.5s Heating: ΔT ≦ 150℃/0.5s Note: Meaning that the ceramic tube detector withstands the shock of sudden cooling (temperature difference 100℃ or less per 0.5 seconds) at the cooling side. or sudden heating (temperature difference 150℃ or less per 0.
6 F 8 A 0 9 3 4 LF546 Converter Specifications Input Input signal: ・Flow rate proportional signal from the detector ・Digital input signal Signal type: 20 to 30Vdc voltage signal Input resistance: About 2.7kΩ Number of input points: 1 Digital input function: Select either of the following.
6 F 8 A 0 9 3 4 Digital output function: Select one of the following: ・ Totalization pulse output: Pulse rate Max. 3kHz(3000pps) ･･･ DO1 Max. 100Hz( 100pps) ･･･ DO2 (option) Pulse width Can be set within a range of 0.3 to 500ms. However, must be 40% or less of the full-scale cycle. If the full scale 1000pps is exceeded, automatically set to 40% of the full-scale cycle. ・ Multi-range switching output: In the case of fourfold range or forward/reverse double range, you need to add digital output optionally.
6 F 8 A 0 9 3 4 15.
6 F 8 A 0 9 3 4 Model LF546 Detector Type Specification Code Model number 1 2 3 4 5 L F 5 4 6 Specification code 7 8 9 10 11 12 13 14 6 A A B 2 1 2 Contents Capacitance Type electromagnetic flowmeter converter Area of use cFMus, Division 2 approved Usage General purpose Mounting Structure Detector / Converter Combined type Display LCD display provided Output Current output 4-20 mA + Status I/O (One pulse/status output, one status output and one input) Communication function HART protocol PROFIBUS PA (
6 F 8 A 0 9 3 4 16. Outline Drawing Meter size (mm) L1(mm) L2(mm) φD1(mm) Mass (kg) 25 80 241 66 Approx. 4 kg 40 100 264 85 Approx. 6kg 50 110 280 102 Approx. 7 kg 80 110 306 127 Approx. 8 kg 100 180 338 159 Approx.
6 F 8 A 0 9 3 4 Appendix 1 Factory default standard value table Parameter names Excitation frequency Flow direction Display 1 Display 2 Display digit setting (for Display 1 and Display 2) Custom coefficient Custom unit Range type Range 1 Ranges 2 to 4 Hysteresis Damping constant Rate-of-change limit Control limit time Low cutoff Display low cutoff Manual zero 4−20mADC alarm output Output low limit setting Digital output 1 Digital output 2 DO1/DO2 active status Digital input DI detective level Count rate P
6 F 8 A 0 9 3 4 When parameter value was appointed in order, parameter value may be different from list. Setting value in each size Range 1 (SI unit) Range 1 (English unit) Meter Size (mm/inch) Ex. Freq (Hz) (m3/h) (m/s) (gal/min) (ft/s) Count rate (gal) 25 / 1 40 / 1.5 50 / 2 80 / 3 100 / 4 400 200 200 200 100 6 15 25 60 100 3.395 3.316 3.537 3.316 3.537 75 175 300 650 1000 31.625 28.826 31.625 26.766 26.
6 F 8 A 0 9 3 4 Appendix 2 System block diagram for LF516/LF546 − 154 −
6 F 8 A 0 9 3 4 Write down the address and phone number of the distributor from which you purchased this product, the product code, SER.NO. and so on. Distributor Address Name Phone number （ ） − Product code LF SER.NO.
FCF50017
