AGM300 / ADM800 Ammonia Gas Monitoring System Instruction 3015-4275 Installation / Operation / Maintenance Rev.
Notice: Product improvements and enhancements are continuous; therefore the specifications and information contained in this document may change without notice. Bacharach, Inc. shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this material. No part of this document may be photocopied, reproduced, or translated to another language without the prior written consent of Bacharach, Inc.
Table of Contents INTRODUCTION ..............................................................................................................................................................II SAFETY PRECAUTIONS .................................................................................................................................................III WARNING STATEMENTS ........................................................................................ERROR! BOOKMARK NOT DEFINED.
Introduction How to Use This Manual Thank you for investing in a BACHARACH Ammonia Gas Monitoring System. This manual provides important information on how to install, operate, and service the AGM300 Ammonia Gas Monitor and ADM800 Ammonia Display Module. Please Read this Manual Carefully Before Use If you have a working knowledge of gas monitors, you will find this manual useful as a reference tool.
Safety Precautions AC Power Supply Ensure the source voltage matches the voltage of the product before energizing the equipment. It is highly suggested that the AGM300 be placed on a separate circuit (with UPS or surge protection).
Safety Precautions (Cont.) Installation Category Installation Category II, Pollution Degree II, as defined by UL. Altitude Limit 2,000 meters Cleaning USE a dry cloth to clean the outside of the case. DO NOT use soap and water. Warning Statements The use of the word WARNING in this manual denotes a potential hazard associated with the use of this equipment.
Functional Overview General Description The AGM300 is designed to support compliance to federal, state and local safety codes governing ammonia gas emissions. Avoiding significant ammonia gas loss reduces equipment replacement costs, maintains equipment efficiency, promotes safety, and protects the environment. The AGM300 provides for the continuous monitoring of ammonia gas levels in up to 16 separate test zones.
AGM300 / ADM800 Refrigerant Gas Leak Monitor Mechanical Room Placement Aux. Horn/Strobe Remote Alarm Fresh air purge from area away from ammonia gas Exhaust Fan Outside Hallway Sample Inlet Pickup Point ADM800 Machine Room Ammonia Display Module outside of mechanical room AGM300 Chiller Ammonia Gas Monitor Sample Inlet Pickup Points The ADM800 should be mounted outside of the mechanical room or at least just inside of a door to the room.
AGM300 Installation Upper Mounting Bracket LED Indicators Lower Mounting Bracket Water Trap STANDARD ACCESSORIES FOR A 4 POINT SYSTEM 5 Line-End Filters (P/N 3015-3420) AGM300/ADM800 Instruction Manual (P/N 3015-4275) Instruction 3015-4275 1
AGM300 - Installation Considerations Locating the Monitor The AGM300 should be centrally located in the facility and should be easily accessible for visual monitoring and servicing. Intake sample lines can be up to 500 feet in length, but it is important to remember that sampling cycle time is proportional to the total number and length of individual sample lines. Dirt, grease, and oils can adversely affect the operation of the AGM300.
AGM300 - Mounting Instructions Screw Locations The AGM300 should be installed plumb and level and securely fastened to a rigid mounting surface. The enclosure utilizes keyhole mounting brackets designed for #12 pan head fasteners. Locate the four screws as shown in the diagram and leave the screw heads protruding approximately 3/16".
AGM300 - Connecting Air Lines Overview Individual sample lines are run from the AGM300 to each area of the facility to be monitored. Additionally, a purge line is installed to provide clean air for resetting the infrared zero baseline. An exhaust line is installed to vent residual gas away from the monitor. All sample line connections are made on the left side of the enclosure as indicated in the photograph below.
Tubing Considerations Use ¼" outside diameter (0.040" wall) flex tubing is used for all air lines (P/N 304-2742). The tubing should be clean and free of residual moisture or other contaminants. The tubing should be cut cleanly with a sharp knife and care should be taken not to distort the tubing end. IMPORTANT: Due to the reactive nature of ammonia gas, it is important to use materials that will not absorb ammonia gas as it passes though the sampling system.
AGM300 - Interior Schematic Primary Filter Intake Manifold Solenoids Intake Solenoid Connectors Power Supply Board Main Board Microcontroller Board Infrared Optical Bench Gas Sample Pump Primary Filter (P/N 3015-3071) Power Supply Board 120 or 230 VAC Determined by Sales Order Intake Manifold Solenoids Main Board Intake Manifold Solenoid Connectors Microcontroller Board Infrared Optical Bench Gas Sample Pump 6 Instruction 3015-4275
AC Power / RS-485 / Relay Connector / 4-20 mAdc Current Loop 4–20 mAdc Interface Board (Optional) AC Power ON/OFF Switch Dual 4-20 mAdc Outputs AC IN Connector T1 (Signal Out Only) DO NOT APPLY POWER! Location of AC Input Line Filter RS-485 Connector (230 VAC Units Only) Relay Connector Ground Stud Alarm 1, 2, 3, Fault Auxiliary AC Out Connector T2 (Used to Supply AC power to Alarm Devices) (Overload Protected by Fuse F3) Switches / Fuses F4 AGM300 Fuses F2 (Refer to Maintenance Section for v
AGM300 - Electrical Wiring It is highly recommended that the AGM300 be connected directly to the AC power source, preferably on its own circuit. The connection should be completed with a UL rated multi-conductor wire (14-18 AWG). Locate service knockouts on exterior of enclosure and install electrical conduit in the typical manner. The AGM300 is available in either a 120 or 230 VAC configuration. The unit’s AC voltage rating is marked on the outside of the enclosure.
AGM300 AC Input Power and Ground Connections Instruction 3015-4275 9
AGM300 - Connecting Communication Devices Ammonia Display Module (ADM800) Connection The AGM300 is connected to the ADM800 using a shielded twisted pair instrument cable. The maximum distance between the farthest away AGM300 and ADM800 is 4500 feet. Use any of the remaining service knockouts to gain access to the interior of the monitor. The RS-485 communication wiring between the AGM300 and ADM800 must be connected in the following manner: Locate the RS-485 connector in the AGM300 (Page 7).
Changing Terminator Settings The terminator switch is shipped from the factory in the terminated or “IN” position. This is the correct setting if the AGM300 is connected as a single device, or it is the last device on the network chain. If the AGM300 is being installed in the middle of a network, the terminator must be moved to the “OUT” position. Locate the switch and determine its position. If it needs to be moved, slide the switch to the appropriate position.
Multiple AGM’s MULTIPLE AGM300’S WITH ADM800 TERMINATOR “IN” NOTE 1: The last AGM300 or ADM800 on either end of the network must have its terminator in the “IN” position, and all other units must have their terminators in the “OUT” position. AMD800 NOTE 2: The total length of the RS-485 cable cannot exceed 4500 feet. (Use instrument cable 20 gage multi-strand shielded and twisted pair – similar or equal to Belden cable #8762.
MULTIPLE AGM300’s CONNECTED TO A BUILDING MANAGEMENT SYSTEM DAISY CHAIN FASHION BUILDING MANAGEMENT SYSTEM RS-485 TERMINATOR “IN” AGM300 UNIT 1 NODE 1 TERMINATOR “OUT” AGM300 UNIT 2 NODE 2 AGM300 UNIT 3 NODE 3 AGM300 UNIT 4 NODE 4 TERMINATOR TERMINATOR TERMINATOR “OUT” “OUT” “IN” AGM300 - PC Software Programming the AGM300 Using PC Software NOTE 1: There are two versions of PC software. Use Version 1.0 with AGM300 units with v1.
7. Using the arrow keys go to EDIT; press ENTER – the EDIT Menu DROPS DOWN; select SYSTEM and then press ENTER – the AGM LOCATION becomes highlighted. Press ENTER to move to the AGM TAG area; use the BACKSPACE key to remove the existing tag; then enter in a new tag. Press ENTER to return to LOCATION. Use the ARROW key to select the next item to be addressed. Note that you cannot change the “SN” or “FIRMWARE” items. Press the ESC key to return to the menu bar. 8.
USB Type Laptops Some of the newer laptops have USB ports and no RS-232 9-pin ports. You will be required to purchase a PCMCIA card that provides an RS-232 output. We recommend the PCMCIA card manufactured by: SEALEVEL SYSTEMS, INC. 155 TECHNOLOGY PLACE P. O. BOX 830 LIBERTY, SC 29657 PHONE – 864-843-4343 www.sealevel.com Part number: PC- SIO-232 PCMCIA CARD A “ straight through” RS-232 cable and a DB25 to DB9 adapter will be required to connect the laptop to the AGM300.
AGM300 - Current Loop Interfaces Optional 4–20 mAdc Outputs Upon installation of the optional 4–20 mAdc Interface Board (Page 7) (P/N 3015-3133), the AGM300 has the capability of providing dual 4-20 mAdc scrolling current loop outputs for connection to external monitoring devices. The interfaces are set up as follows: Loop 1 indicates zone area Loop 2 indicates PPM Connection The external devices are connected to the AGM300 using a shielded dual twisted pair cable.
AGM300 - Connecting External Alarms Overview The AGM300 includes 4 Form C SPDT alarm contacts for the connection of external alarm devices. The relays are factory assigned to the following conditions: Relay #1 Leak Relay #2 Spill Relay #3 Evacuate Relay #4 Fault Connection Use the AC conduit or any of the remaining service knockouts to gain cable access to the interior of the monitor. Locate the relay connector (Page 7) and remove it from the circuit board.
Typical AGM300 Relay 1 and Relay 2 Wiring LEAK SPILL EVACUATE FAULT Horn Aux. Power Neutral Line Neutral Line RS-485 Main AC Input Jumper the ‘Neutral’ of the auxiliary power connector to the ‘Common’ on the relay block. Connect one end of strobe or horn to the ‘NO’ of whichever level of alarm is appropriate for application. The other end of strobe or horn is connected to the ‘Line’ of the auxiliary power connector (5 A max.).
ADM800 Installation ADM800 Oblique Photo Upper & Lower Mounting Brackets Upper Mounting Bracket Lower Mounting Bracket Instruction 3015-4275 19
ADM800 - Installation Considerations Overview Up to four AGM300 monitors may be connected to a single ADM800 display module. The ADM800 can be located anywhere up to 4500 feet from the furthest AGM300. The display module should be installed out of direct sunlight in a clean area that is not subject to temperature or humidity extremes. Warnings and Cautions WARNING - Drilling holes in the AGM300 and ADM800 enclosure will void the warranty. Please use knockouts provided for electrical connections.
ADM800 - Mounting Instructions Screw Locations The ADM800 should be installed plumb and level and securely fastened to a rigid mounting surface. The enclosure utilizes keyhole mounting brackets designed for #12 pan head fasteners. Locate the four screws as shown in the diagram and leave the screw heads protruding approximately 3/16".
ADM800 - Interior Schematic Microcontroller Board CPU Reset Switch Main Board Ground Stud AC Power Microcontroller Board CPU Reset Switch Power Supply Board 120–230 VAC Input Main Board AC IN Connector T3 Front Panel 22 Chassis Instruction 3015-4275
AC Power RS-485 Connectors Terminator Switches Relay Connector Fuses 1 Amp 250 VAC P/N 3015-4011 Terminator Switches F2 F1 Instruction 3015-4275 TO MONITORS TO HOST RS-485 to HGM300 Monitors RS-485 to Building Management System Relay Connector AC IN Connector T3 23
ADM800 - Electrical Wiring It is highly recommended that the ADM800 be connected directly to the AC power source, preferably on its own circuit. The connection should be completed with a UL rated multi-conductor wire (14-18 AWG). Locate service knockouts on exterior of enclosure and install electrical conduit in the typical manner. The ADM800 is available in either a 120 or 230 VAC configuration. The unit’s AC voltage rating is marked on the outside of the enclosure.
ADM800 AC Input Power and Ground Connections Instruction 3015-4275 25
ADM800 - Communication Connections AGM300 Network The ADM800 Ammonia Display Module is connected to the AGM300 network using a shielded twisted pair cable. The maximum distance between the ADM800 and the farthest AGM300 is 4500 feet. Use any of the remaining service knockouts to gain access to the interior of the ADM800. The RS-485 communication wiring between the ADM800 and AGM300 must be connected in the following manner: Locate the RS-485 connector marked “TO MONITORS” in the ADM800 (Page 23).
Changing Terminator Switch Settings The terminator switch for the RS-485 “TO MONITORS” connector is shipped from the factory in the terminated or “IN” position. This is the correct setting if the ADM800 is connected to only one AGM300, or if it is the last device on a network chain. If the ADM800 is being installed in the middle of a network, the terminator must be moved to the “OUT” position. Refer to Multiple AGM's on Page 12.
ADM800 - Connecting External Alarms Overview Two SPDT alarm contacts are available for the connection of external alarm devices. These alarms are useful for alerting the user to global conditions anywhere on the network. Each relay can be programmed to respond to alarm, fault, or monitor ON conditions (refer to Setting Relay Parameters on Page 36). Connection Use the AC conduit or any of the remaining service knockouts to gain access to the interior of the ADM800.
ADM800 Operation ADM800 Exterior Schematic Display Screen Navigation Buttons Cursor Pad LED Indicators Navigation Buttons LED Indicators Instruction 3015-4275 Display Screen Cursor Pad 29
ADM800 - Overview The ADM800 displays comprehensive information about the AGM300 network status and enables complete programming control of all system operations. The prominent features of the display module are discussed below. Display Screen The display screen is a back-lit LCD. Control Keys The 4 keys on each side of the display window are used to navigate between screen displays. A graphic box that is open to the edge of the window indicates that the adjacent control key is active.
ADM800 - Screen Displays When first powered up a splash screen appears indicating the serial number and firmware revision number. After a brief moment the System Screen is displayed. Please refer to the Appendix for a logic diagram of all the screen displays. There is a 15-minute warm-up period after power is first applied. Under “AGMS”, "WARM UP" is displayed. The green indicator on the AGM will blink during the warm-up period. IMPORTANT: DO NOT plug the gas-sample hose or inlet port of any zone.
ADM800 - System Programming Setup Parameters Before working with the AGM300 network, several global parameters must be defined. Most of these are entered in the ADM Setup Screens or via the PC software. Parameters must also be defined for each AGM300 monitor connected to the network. These settings serve to identify each monitor and define how they operate. These are entered in the AGM Setup Screens. Finally, parameters must be defined for each individual monitoring zone.
ADM800 - Setup Programming Setting the Clock From the top level System Screen press the key adjacent to the date/time field to go to the Clock Setup Screen. Clock Setup Screen Use the LEFT/RIGHT cursor keys to move the cursor across the field to the value you wish to edit. Use the UP/DOWN cursor keys to modify the field value and press the ENTER key to accept your entries.
Navigating to the 1st ADM Setup Screen From the top level System Screen press the ADM SETUP key to go to ADM Setup Screen #1. ADM Setup Screen #1 Contrast This value sets the screen brightness. 1. Press the CONTRAST key to adjust its setting. 2. Use the UP/DOWN cursor keys to modify the setting. 3. Press ENTER to accept the new entry or QUIT to revert to the previous setting. Number of AGM Units This is the number of AGM300 monitors from 1–4 connected to the ADM800. 1.
Audible Alarm This parameter selects the function of the ADM800’s internal audible alarm. 1. Press the AUDIBLE ALARM key to adjust the setting. 2. Use the UP/DOWN cursor keys to select unused, monitor on, evacuate, spill, leak, fault, or alarm. 3. Press ENTER to accept the new entry or QUIT to revert to the previous setting. Enabling Building Management System Connection This enables or disables the connection to a Building Management System. 1. Press the BMS key to adjust the setting. 2.
Navigating to the 2nd ADM Setup Screen From ADM Setup Screen #1 press the MORE key to go to ADM Setup Screen #2. Press the BACK key to return to ADM Setup Screen #1. ADM Setup Screen #2 Setting Relay Parameters This setting determines the function of relays 1 and 2 mounted inside the ADM unit. 1. Press the key adjacent to the relay parameter you want to adjust. 2. Use the UP/DOWN cursor keys to select unused, monitor on, evacuate, spill, leak, fault, or alarm. 3.
AGM300 - Setup Programming Navigating to the 1st and then 2nd AGM Setup Screen From the System Screen, press the key adjacent to the target AGM300 to go to that unit's AGM Setup Screen #1. AGM Setup Screen #1 From AGM Setup Screen #1 press the SETUP key to go to AGM Setup Screen #2. Press the QUIT key to return to the System Screen.
Location This is the name you assign to the AGM300 to identify its location. It may have up to 12 alphanumeric characters. 1. Press the LOCATION key to modify the setting. 2. Use the LEFT/RIGHT cursor keys to move across the entry field and the UP/DOWN cursor keys to modify the individual characters. 3. Press ENTER to accept the new entry or QUIT to revert to the previous setting. Number of Zones Installed IMPORTANT: Do not change the number of zones to deactivate excess zones.
Loop 2 Factor This sets the PPM scale factor for current loop number 2. To calculate the current output, multiply the scale factor by the PPM and add 4. For example, at the default scale factor of 0.016, a measurement of 100 PPM would generate a current of 5.6 mA. In no case can current output exceed the 20 mA capacity of the interface. 1. Press the LOOP2 FACTOR key to adjust the setting. 2.
Navigating to the 3rd AGM Setup Screen From AGM Setup Screen #2, press the MORE key to go to AGM Setup Screen #3. Press the BACK key to return to AGM Setup Screen #2. AGM Setup #3 Screen Service Timeout Sets the length of time the Service Mode is in effect. Stops the monitor for up to 240 minutes (4 hrs) to allow for servicing the unit. See Service Mode on Page 61. 1. Press the SERV TIMEOUT key to adjust the setting. 2.
ADM800 - Zone Setup Programming Navigating to the 1st Zone Setup Screen There are two ways to display Zone Setup Screen #1: • From the System Screen (Page 31) press the key adjacent to the AGM300 unit associated with the zone you wish to work with. Next, press the ZONES key; and then press the key adjacent to the desired zone. • From the top level Zone Screen (Page 44) press the key adjacent to the zone you wish to work with.
Average Temperature This temperature reading may be changed to the exact temperature at the sample point for greater accuracy. The adjustment range is from –50 to +70 degrees C. 1. Press the AVG TEMP key to adjust the temperature value. 2. Use the LEFT/RIGHT cursor keys to move across the entry field and the UP/DOWN cursor keys to modify the setting. 3. Press ENTER to accept the new entry or QUIT to revert to the previous setting.
Spill Level This is the concentration level in PPM that will activate a spill alarm condition. 1. Press the SPILL LEVEL key to adjust the value. 2. Use the UP/DOWN cursor keys to modify the setting. 3. Press ENTER to accept the new entry or QUIT to revert to the previous setting. NOTE: This value must be less than the evacuate level and greater than the leak level. Evacuation Level This is the concentration level in PPM that will activate an evacuate alarm condition. 1.
General Operation Functional Overview Normally each AGM300 will sequentially perform measurements on its active zones without user input. The total time it takes an AGM300 to complete a measurement cycle is directly proportional to the number of active zones and the physical length of the sample-gas lines. Monitors linked together on a network operate independently of each other and consequently complete their respective measurement cycles at different rates.
Zone Hold Mode A zone can be placed on hold and continuously monitored for a length of time determined by the Zone Hold Time value (Page 38). To place a zone on hold, press and hold down the key adjacent to that zone until you hear a beep. The word "HOLDING" appears to identify which zone is being held. Zone Screen (Hold Mode) Zone on Hold Once in the hold mode you can further investigate the status of the zone by pressing the adjacent key and going to the Zone Setup #1 Screen (Page 41).
If the current Zone Screen appears normal, scroll through the displays using the NEXT/BACK keys or the UP/DOWN cursor keys until you locate the affected zone. You can further investigate the status of the affected zone by pressing the adjacent key and going to the Zone Setup #1 Screen (Page 41). You may also press the ALARM key to go directly to the Alarm Summary Screen (Page 50). See Working with Alarms on Page 50 to learn more about responding to alarms.
Working with the System Screen The System Screen provides a summary view of the entire AGM300 network. The boxes on the left side of the screen indicate the status of each AGM300 monitor including the name, the current zone, and whether fault or alarm conditions are present on the network. System Screen Alarm Conditions When an alarm condition is detected anywhere on the network the red ALARM LED will glow.
Alarm Log From the System Screen press the key adjacent to the AGM300 unit that you wish to view. AGM Setup #1 Screen Press the ALARM EVENT LOG key to display Alarm Log Screen. Alarm Log Screen Use the LEFT/RIGHT and UP/DOWN cursor keys to move through the log. The Alarm log shows the last 20 alarm events. An alarm event is the occurrence of any alarm, any change in alarm level, or the clearing of any alarm. The alarm level is indicated by an L (leak), S (spill), or E (evacuate).
Fault Conditions If a system malfunction occurs, the yellow FAULT LED will glow. Additionally, an external alarm device may activate and an audible alarm may sound if those features have been enabled (Pages 28 & 35). The FAULT box on the right of the screen will blink and then counts the number of AGM units on the system with a fault. To investigate a fault, press the FAULTS key to go to the Fault Screen (Page 54). See Working with System Faults on Page 54 to learn more about responding to system faults.
Working with Alarms Functional Overview If the PPM level for any zone exceed its designated spill, leak, or evacuate thresholds, an alarm condition will be created. Once the AGM300 completes a measurement cycle in the affected zone the alarm condition will be indicated. At that time the red ALARM LED on the AGM300 will glow. Additionally, an external alarm device may activate and an audible alarm may sound if those features have been enabled (Pages 17 & 38).
Alarm Detail Screen To further investigate an alarm, press the adjacent key to go to the Alarm Detail Screen. Alarm Detail Screen The Alarm Detail Screen displays more comprehensive information about the nature of the alarm including: • Complete location information • Current PPM • Peak PPM and peak time • Type of alarm, alarm time, and date This screen includes three active navigation keys at the bottom of the display.
Acknowledging Alarms Each pending alarm may require, depending upon selected alarm mode, acknowledgment before the system returns to normal operation (refer to Alarm Ack Mode on Page 38). To acknowledge an alarm, navigate to the Alarm Detail Screen and press the ACK key as previously described. You will then be returned to the Alarm Summary Screen and the box associated with that alarm will no longer be blinking, indicating that the alarm has been acknowledged.
Working with the Trend Screen Overview - Log Interval The AGM300 retains a data log of 100 measurements for each zone. The log interval is the number of minutes from 1 to 1440 between each log point. This parameter can be changed from the Zone Setup #1 Screen (Page 41). The default setting for this parameter is 1440 minutes (24 hours). If the log interval time is set to 0, then a measurement is recorded in the trend log after every measurement cycle.
Working with System Faults Functional Overview If a system malfunction occurs, the AGM300 will detect the problem and cause its yellow FAULT LED to glow. Additionally, an external alarm device may activate and an audible alarm may sound if those features have been enabled (Pages 17 & 38). The next time the ADM800 polls the affected monitor its yellow FAULT LED will also glow.
CRITICAL FAULTS • NO FLOW ON ZONE – Go to the System Screen (Page 47) and press the ZONES key. The Zone Screen (Page 44) will display a “NO FLOW” message in each individual zone affected. Check for a blockage in the air sample line or at the line end filter. Once the blockage has been cleared, the AGM300 will return to normal operation after the zone has been sampled. NOTE: This can take some several minutes since it is dependent upon how many zones there are and their lengths.
Clearing System Faults If the fault condition is associated with an AGM300, the monitor will return to normal operation soon after the problem is corrected. At that time the YELLOW LED will turn off and any external alarms connected to the monitor’s alarm relays will also turn off. The ADM800 will return to normal operation the next time it polls the affected AGM300 monitor. Once the system malfunction has been corrected it may take some time for the fault condition to clear completely.
Working with the Calibration Screen Overview The Calibration Screen is used to adjust the IR sensor’s calibration factor. IMPORTANT: Changing information on CAL FACTORS will VOID the factory calibration. Typically, the unit will remain within the factory-calibrated accuracy indefinitely and no calibration is required. Complex software algorithms adjust for temperature drift, IR source aging, and pressure changes in order to keep the unit within factory accuracy specifications.
Calibration Procedure The CAL FACTOR is determined by sampling a known dilution of ammonia gas. The sample must be prepared to less than half the desired accuracy, and the concentration must be corrected for ambient temperature and pressure at the time of measurement. Calibration is best performed at or near full scale (10,000 PPM). It can, however, be done at any concentration, and ideally in the range where maximum accuracy is desired down to, but not below, 100 PPM.
Working with the Diagnostic Screen Overview The Diagnostic Screen displays reference values for use by repair technicians for troubleshooting purposes. Navigating to the Diagnostic Screen Display the System Screen (Page 31); press the key adjacent to the target AGM300 unit to go to that monitor’s AGM Setup Screen #1 (Page 37); and then press the DIAG key to go to the selected monitor’s Diagnostic Screen.
LINE 7: PPM – Parts Per Million is the volume concentration referenced to standard temperature and pressure and is computed from lines 5, 8 and 13. There are two figures given. The first (annotated by a B) is the actual PPM at the IR bench. The second is a PPM reading normalized to standard temperature and pressure. LINE 8: Zero Temperature – This line contains the sensor and enclosure temperature measured and stored during the last purge cycle in degrees C.
Service Mode When activated, the Service Mode will disable a specific AGM300 unit for a specified length of time. The default is 60 minutes. This time interval can be changed per Section Service Timeout on Page 40. IMPORTANT: Note that while in the Service Mode no measurements are made, nor are any alarms activated. From the System Screen (Page 31), select the key adjacent to the AGM unit you wish to place into its Service Mode.
Notes: 62 Instruction 3015-4275
Appendix Instruction 3015-4275 63
AGM300 / ADM800 Maintenance Warnings and Cautions WARNING - Always remove AC input power to the monitor before working on the interior of the instrument. CAUTION - When working inside the instrument be very careful not to dislodge any electrical wiring or pneumatic tubing. The AGM300 contains sensitive electronic components that can be easily damaged. Be careful not to touch or disturb any of these components.
Optional Accessories Intake Manifolds Up to three additional intake manifolds (P/N 3015-3419 & P/N 3015-3411) can be installed in the AGM300 to increase the total capacity to 16 zones. Each manifold requires a sample line-end filter for each of the 4 zones. Please follow the instructions provided to install the manifolds. Then follow the instructions earlier in this manual to install the air lines and complete the zone programming steps. The AGM300 setup must also be updated to recognize the new zones.
ADM800 - Logic Diagram 66 Instruction 3015-4275
RS-485 Communication Protocol Overview The following instructions are intended as a guide for integrating the AGM300 network into a Building Management System. If you are unfamiliar with complex systems of this type, it is recommended that you contact Bacharach for technical assistance. MODBUS RTU Protocol The AGM300 monitor communicates with master devices (such as the ADM800 or a Building Management System) over the RS-485 serial interface.
AGM300 MODBUS RTU Operation Overview The AGM300 and ADM800 are equipped to communicate with other equipment using the MODBUS RTU protocol. Using this communication channel a MODBUS master device may communicate with up to 15 AGM300s on a communications network, exchanging measurement information, alarm data, fault data, history (logs and trends) and setup information. Additionally, the MODBUS master can control the operating state of an AGM300, placing the AGM300 in any of its different operating modes.
Notes on Network Topologies AGM300s may be connected directly to the MODBUS network or they may be connected to the network through an ADM800. In either case, each AGM300 must have a unique node ID. Up to 15 AGM300s can be connected directly to the MODBUS network. If AGM300s are accessed via an ADM800 connected to a MODBUS network, the ADM800 “BMS enabled” parameter must be set equal to “1” via the “ADM SETUP” screen on the ADM800.
Summary of Registers Register Name Number Type Description System Data 0x0010h R/W AGM System Setup Data Status 0x0011h R/W Operating summary of faults, alarms and status Zone Data 0x12xxh R/W Setup data for up to 16 zones (xx CAL Data 0x0014h R/W Cal Factors for all gases Date/Time 0x0015h R/W Set AGM300 date & time Sensor Data 0x0016h R Raw measurement of sensors Rel.
System Data Register Register 0x0010h R/W 54 bytes Variable Type Length Description Type UI 2 bytes Indicates EEPPROM has been initialized if value = 300 DO NOT MODIFY REV Float 4 bytes Firmware Rev Level DO NOT MODIFY SN UI 2 bytes Firmware Serial Number DO NOT MODIFY Node UC 1 byte Network Slave Node # (valid values are 1-15). The default is that indicated by the Node DIP Switch on main board.
Status Register Register 0x0011h R/W 10 bytes Variable Type Length Description Mode UC 1 byte Defines Operating Mode of AGM300. 0 = normal Mode; 1 = Zone_Hold Mode; 2 = Diagnostic Mode; 3 = Service mode. DO NOT MODIFY (use zone hold register or service mode register to change this parameter) State UC 1 byte Defines AGM300 Current State.
Zone Data Register 0x12xxh R/W 78 bytes Each zone for an AGM300 has a separate Zone data structure that is 78 bytes long. The zone number is the low order byte in the register address (i.e., Zone 1 data register = 0x1201h) Variable Type Length Description Location C 13 bytes 13 byte array, Alpha Numeric Description or Name of Zone Flow OK UC 1 byte Status of Flow check. Value of 1 indicates flow check is good. DO NOT MODIFY Refrig.
Notes on Alarms and Alarm Acknowledge The AGM300 can be operated in two different alarm acknowledge modes, Auto and Manual (set via the alarm_ack_mode variable in the system data register). For purposes of this discussion, the term “Alarm” refers to an AGM300 state where the alarm light is on and the appropriate alarm relay is activated. The term “Alarm condition” refers to the external condition (i.e., refrigerant leak) that initially causes the AGM300 to go into an alarm.
Cal Data Register Register 0x0014h R/W 174 bytes Variable Type Length Description Factor Float 132 bytes 33 element array containing cal factors for each of the 33 gases. Order of Cal Factor is defined in Note 1 under Zone Data Curve UC 3 bytes Existing Master Curve to use for user defined “NEW GAS” New Gas Name C 39 bytes 3 x 13 array that contains the names for each of 3 new gases NOTE: “Future” Gases are gases that will be added to the library at a later date.
Sensor Data Register Register 0x0016h R 82 bytes Variable Type Length Description Pressure Float 4 Manifold Pressure is PSIA P_Volts Float 4 Pressure sensor output Voltage Vacuum_P Float 4 Pressure with all value closed and pump on in PSIA Ambient_P Float 4 Absolute Ambient Pressure in PSIA Box_T Float 4 Enclosure Temperature in Degrees C Box_T_Volts Float 4 Box temp sensor output voltage Bench_T Float 4 Optical bench temperature in Degrees C Bench_T_Volts Float 4 Benc
Release Zone Hold Register Variable Type Rel_Hold * Register 0x0017h Length Variable Zone_Hold See description of STATUS REGISTER Register 0x0018h Type * Length 10 bytes Description * Hold Zone Register W W 10 bytes Description * See description of STATUS REGISTER Notes Concerning the AGM300 Hold Mode The AGM300 can be made to hold or “dwell” on a particular zone if necessary. The length of the hold time is defined by the HOLD TIME parameter in the System Data Register.
Fault Log Register Register 0x1900, 0x1901h R 302 bytes These registers contain the 20 most recent fault events, the time they occurred, and a pointer to the most recent event. The data is split into 2 registers. The first register contains 200 bytes and the second register contains 102 bytes. The results of these two register reads should be recombined into the Fault Log Data Structure after both have been received Variable Type Length Description Fault UI 40 bytes 20 most recent fault events.
Service Mode Register Variable Rel_Svc_Mode Register 0x001Bh Type Length * Variable Ent Svc_Mode Type * See description of STATUS REGISTER Register 0x001Ch Length 10 bytes Description * Release Service Mode Register W W 10 bytes Description * See description of STATUS REGISTER Notes Concerning the AGM300 Service Mode The AGM300 can be placed into service mode if necessary. During service mode the unit will take no measurements, any and all alarms are silenced, and all relays are opened.
PPM Register Register 0x001Eh R 32 bytes Variable Type Length Description PPM UI 32 bytes 16 Unsigned Integers that represent the PPM values for each AGM300 zone NOTE: 16 values are returned independent of the number of actual zones installed in the unit. The master device is required to know how many zones are installed in the unit (available in the System Register) in order to properly interpret the data.
WARRANTY and SERVICE Warranty Subject to the terms herein, Seller warrants the original equipment cataloged or manufactured by the Seller and furnished hereunder is free from defects in material and workmanship, and will be of the kind and quality designated or described on the quotation.
Return Procedure To return equipment to the factory for repair a Return Authorization (RA) number should be requested from the factory. Equipment will not be received without an RA number. Returned equipment should be sent to the factory at the following address: Bacharach, Inc. 621 Hunt Valley Circle New Kensington, PA 15068 Attn.
AGM300 - Specifications Product Type: Ammonia gas, multiple area infrared monitoring system for low level continuous monitoring of ammonia refrigerant gas used in most commercial refrigeration systems. System design supports compliance to the refrigerant monitoring requirements of ANS/BSR ASHRE 15-1994.
ADM800 - Specifications Product Description: The ADM800 Ammonia Display Module provides remote programming, interrogation and display functionality to support the AGM300 Ammonia Gas Monitor. The system design supports compliance to the refrigerant monitoring requirements of ANS/BSR ASHRE 15-1994. Inputs: The ADM800 accepts inputs from up to four AGM300 monitors. It offers a wide variety of displays and can fully program any associated monitor.
Notes: Instruction 3015-4256 85
Headquarters: 621 Hunt Valley Circle, New Kensington, PA 15068 Ph: 724-334-5000 • Fax: 724-334-5001 • Toll Free: 1-800-736-4666 Website: www.bacharach-inc.com • E-mail: help@bacharach-inc.com Printed in U.S.A. ® Registered Trademark of Bacharach Inc.
