712C RTD Calibrator Users Manual January 2014 © 2014 Fluke Corporation. All rights reserved. Specifications are subject to change without notice. All product names are trademarks of their respective companies.
LIMITED WARRANTY AND LIMITATION OF LIABILITY This Fluke product will be free from defects in material and workmanship for three years from the date of purchase. This warranty does not cover fuses, disposable batteries, or damage from accident, neglect, misuse, alteration, contamination, or abnormal conditions of operation or handling. Resellers are not authorized to extend any other warranty on Fluke’s behalf.
Table of Contents Title Page Introduction .................................................................................................................... How to Contact Fluke ..................................................................................................... Safety Information .......................................................................................................... Safe Working Practices ...............................................................................
712C Users Manual Simulate RTDs .............................................................................................................. Scale mA Channel to Temperature................................................................................ Set 0 % and 100 % Output Parameters ......................................................................... Step and Ramp Modes .................................................................................................. Select Step or Ramp Mode ...
List of Tables Table 1. 2. 3. 4. 5. 6. 7. Title Page Summary of Source and Measure Functions ........................................................................ International Electrical Symbols ............................................................................................ Input/Output Terminals and Connectors ................................................................................ Key Functions ...................................................................................
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List of Figures Figure 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. Title Page Standard Equipment .............................................................................................................. Input/Output Terminals and Connectors ................................................................................ Keys ...................................................................................................................................... Elements of a Typical Display ................
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Introduction • Canada: 1-800-36-FLUKE (1-800-363-5853) Fluke 712C RTD Calibrator (the Product) is a handheld, battery-operated instrument that measures and sources a variety of RTDs. It also has an isolated channel to measure 4-20 mA (with loop power option). See Table 1.
712C Users Manual Table 1.
RTD Calibrator Safety Information Safety Information A Warning identifies conditions and procedures that are dangerous to the user. A Caution identifies conditions and procedures that can cause damage to the Product or the equipment under test. International electrical symbols used on the Product and in this manual are explained in Table 2. • • • • Safe Working Practices Review the safety information and comply with all safe working practices.
712C Users Manual Table 2. International Electrical Symbols Conforms to relevant Australian Standards. Inspected and licensed by TÜV Product Services. CAT II MEASUREMENT CATEGORY II is applicable to test and measuring circuits connected directly to utilization points (socket outlets and similar points) of the low voltage MAINS installation.
RTD Calibrator Standard Equipment Standard Equipment The items listed below and shown in Figure 1 are included with your Product. If the Product is damaged or something is missing, contact the place of purchase immediately. To order replacement parts or spares, see the user-replaceable parts list in Table 7.
712C Users Manual AC175 Alligator Clips (2 sets) 754-8016, Alligator Clips (1 set) Fluke-75X-Stackable Test Leads (1 set) TL75 Test Leads (2 sets) hnh01.eps Figure 1.
RTD Calibrator Input and Output Terminals Input and Output Terminals Figure 2 shows the input and output terminals on the Product. Table 3 explains their use. 1 2 6 5 4 3 hnh02.eps Figure 2.
712C Users Manual Table 3. Input/Output Terminals and Connectors No. 8 Name Description , Measure, mA terminals Input terminals for measuring current, and supplying loop power. , Source/ Measure, RTD, Ω terminals Terminals for sourcing or measuring 2W resistance and RTDs. , Measure 3W, 4W Terminals for performing 3W and 4W RTD measurements.
RTD Calibrator Keys Keys The Product has keys for different purposes. Some keys have secondary functions that are available when SHIFT already shows on the display. 712C RTD CALIBRATOR 2 Figure 3 shows the Product keys. Table 4 explains their use. 3 1 4 10 SET 9 SET UNITS mA 5 LOOP PWR 3 8 6 7 hnh03.eps Figure 3.
712C Users Manual Table 4. Key Functions No. Name Toggles through the 2-, 3-, and 4-wire RTD measurement mode. Increments output by 25 % of span. Secondary function: toggles between temperature units (°C or °F.). Decreases output by 25 % of span. Secondary function: activates a 24 V loop supply. Up/down arrow increases or decreases the source level. Cycles through different options. Secondary functions: Enters Ramp or Step mode.
RTD Calibrator Display Display Figure 4 shows the elements of a typical display. Table 5 describes the elements. 3 2 4 13 5 6 1 7 12 11 14 10 9 8 hnh19.eps Figure 4.
712C Users Manual Table 5. Elements on the Display Item No. 12 Description 100 % of value span Source or Measure mode Selected digit that can be edited Excitation current from the measuring device under test is too high. Battery usage status Excitation current from your device under test exceeds the limits of the Product.
RTD Calibrator Auto Power-Off Auto Power-Off Auto Backlight-Off The product provides an auto power-off function to save power. When the auto power-off mode is enabled, the Product automatically powers off after 15 minutes of inactivity. The Product provides an auto backlight-off function to save power. When the auto backlight-off mode is enabled, the backlight automatically turns off after 2 minutes of inactivity. To enable the auto power-off mode: To enable the auto backlight-off mode: 1. Push .
712C Users Manual Contrast Adjustment The Product allows you to adjust the display contrast, as shown in Figure 5. To adjust the contrast: 1. Push until Measure shows on the display. 2. Push to darken contrast, or to lighten contrast. hnh18.eps Figure 5.
RTD Calibrator Magnet Mounting and Hanging Strap Magnet Mounting and Hanging Strap The Product has a magnet on the rear of the unit. It is removable. This magnet enables users to mount the Product on metal environment and free their hands. In addition, this Product has a hanging strap on the magnet. Besides its hanging purpose, the strap connects the magnet and the Product to avoid losing the magnet. This strap is also removable. Figure 6 shows the magnet mounting of the Product with the hanging strap.
712C Users Manual Measure mA Current and Activate Loop Power Supply 712C RTD CALIBRATOR 1 (Shift) 2 The Product lets you measure mA current. It also has a loop power function that activates a 24 V supply in series with the current measuring circuit. This allows you to test a transmitter when it is disconnected from plant wiring. Red TEST DC PWR – ++ – + Caution To prevent impact to the measurement function, do not use the Product to measure current near strong magnetic fields.
RTD Calibrator Measure Temperature Measure Temperature Use Resistance-Temperature Detectors (RTDs) The Product accepts RTD types shown in Table 6. RTDs are characterized by their resistance at 0 °C (32 °F), which is called the “ice point” or R0. The most common R0 is 100 Ω. The Product accepts RTD measurement inputs in 2-, 3-, or 4-wire connections, with the 3-wire connection the most common.
712C Users Manual Table 6. RTD Types Accepted RTD Type Ice Point (R0) Material α Range (°C) Pt100 (3926) 100 Ω Platinum 0.003926 Ω/°C -200 to 630 Pt100 (385)[1] 100 Ω Platinum 0.00385 Ω/°C -200 to 800 Ni120 (672) 120 Ω Nickel 0.00672 Ω/°C -80 to 260 Pt200 (385) 200 Ω Platinum 0.00385 Ω/°C -200 to 630 Pt500 (385) 500 Ω Platinum 0.00385 Ω/°C -200 to 630 Pt1000 (385) 1000 Ω Platinum 0.00385 Ω/°C -200 to 630 Pt100 (3916) 100 Ω Platinum 0.
RTD Calibrator Measure Temperature 2W RTD Sensor 3W RTD Sensor 4W RTD Sensor hnh15.eps Figure 8.
712C Users Manual Source Temperature Signals The Product allows you to source temperature signals via sensor. See Figure 9. 1. Push to switch to Source mode on temperature channel. 2. Use the arrow keys to define the simulated temperature value. The display shows the temperature channel with a set temperature value. Meanwhile, it shows the actual RTD Ohm value below with smaller font size. SOURCE 1 2 3 4 Common hnh09.eps Figure 9.
RTD Calibrator Simulate RTDs Simulate RTDs Connect the Product to the instrument under test as shown in Figure 10. Proceed as follows to simulate an RTD: 1. If necessary, push for Source mode. 2. Push for the RTD display. 3. Note Use the 2W, 3W, and 4W terminals for measurement only, not for simulation. The Product simulates a 2-wire RTD at its front panel. To connect to a 3-wire or 4-wire transmitter, use the stacking cables to provide the extra wires. See Figure 10.
712C Users Manual SOURCE 712C RTD CALIBRATOR Sensor Terminal 1 1 2 4 2 3 3 4 hnh11.eps Figure 10.
RTD Calibrator Scale mA Channel to Temperature Scale mA Channel to Temperature Set 0 % and 100 % Output Parameters The Product provides a function to convert mA current channel reading to temperature reading. You must set the 0 % and 100 % points before you can use the step and ramp functions. Proceed as follows: To scale mA channel to temperature: 1. If necessary, push for Source mode. 1. Push . 2. Push and use the arrow keys to enter the value. 2. Push . 3.
712C Users Manual Step and Ramp Modes Set Step and Ramp Range Select Step or Ramp Mode In Source mode, push , and then use and to set the value of Step and Ramp. The Product allows you to set Step and Ramp modes for easier check of points within the linear range in output mode. To set the Step or Ramp mode: 1. Push . 2. Use and to select Step mode and Ramp mode. The or icon shows on the Product display accordingly. Note This function is only available when Source mode is selected.
RTD Calibrator Replace the Batteries Replace the Batteries Warning To prevent false readings, which could lead to possible electric shock or personal injury, replace the batteries as soon as the low battery indicator appears. Figure 11 shows you how to replace the batteries. hnh38.eps Figure 11.
712C Users Manual Service Center Calibration or Repair Maintenance Clean the Product Warning To prevent personal injury or damage to the Product, use only the specified replacement parts and do not allow water into the case. Caution To prevent damage to the plastic lens and case, do not use solvents or abrasive cleansers. Clean the Product with a soft cloth dampened with water or water and mild soap.
RTD Calibrator Maintenance Replacement Parts Case bottom assembly 4307079 Screw, M3, 13.
712C Users Manual 11 1 12 10 2 13 14 6 3 19 15 7 4 16 17 5 18 8 9 hnh46.eps Figure 12.
RTD Calibrator Specifications Specifications Specifications are based on a one year calibration cycle and apply from +18 °C to +28 °C unless stated otherwise. All specifications assume a 5 minute warmup period. DC mA Measurement Range 0-24 mA Resolution 0.001 mA Accuracy (% of Reading + Floor) 1 year 2 year 0.01 % + 2 μA 0.02 % + 4 μA Note: Temperature coefficient: ±(0.002 % of reading + 0.
712C Users Manual Ohms Source Accuracy Ohms Range Excitation Current from Measurement Device (% of Output + Floor) 1 year 2 year 1.0 Ω to 400.0 Ω 0.1 mA to 0.5 mA 0.015 % + 0.1 Ω 0.03 % + 0.2 Ω 1.00 Ω to 400.00 Ω 0.5 mA to 3 mA 0.015 % + 0.05 Ω 0.03 % + 0.08 Ω 400.0 Ω to 1500.0 Ω 0.05 mA to 0.8 mA 0.015 % + 0.5 Ω 0.03 % + 0.8 Ω 1500.0 Ω to 4000.0 Ω 0.05 mA to 0.4 mA 0.015 % + 0.5 Ω 0.03 % + 0.8 Ω Resolution 1.00 Ω to 400.00 Ω 0.01 Ω 400.0 Ω to 4000.0 Ω 0.
RTD Calibrator Specifications RTD Input and Output Measure (°C) RTD Type (α) Range (°C) 1 year 2 year Source (°C) Source Current 1 year 2 year -200 to 100 1.5 3 1 mA 1.5 3 100 to 800 1.8 3.6 1 mA 1.8 3.6 -200 to 100 0.4 0.7 1 mA 0.4 0.7 100 to 800 0.5 0.8 1 mA 0.5 0.8 -200 to 100 0.2 °C 0.4 °C 0.2 °C 0.4 °C 100 to 800 0.015 %+0.18 °C 0.03 %+0.36 °C 0.015 %+0.18 °C 0.03 %+0.36 °C -200 to 100 0.2 °C 0.4 °C 0.2 °C 0.4 °C 100 to 630 0.015 %+0.18 °C 0.03 %+0.
712C Users Manual -200 to 100 0.2 °C 0.4 °C 100 to 630 0.015 %+0.18 °C 0.03 %+0.36 °C -200 to 100 0.2 °C 0.4 °C 100 to 630 0.015 %+0.18 °C 0.03 %+0.36 °C -200 to 100 0.2 °C 0.4 °C 100 to 630 0.015 %+0.18 °C 0.03 %+0.36 °C 10 Ω Cu(427) -100 to 260 1.5 3 120 Ω Ni(672) -80 to 260 0.15 50 Ω Cu50 -180 to 200 100 Ω Cu100 YSI400 1000 Ω Pt(385) 100 Ω Pt(3916) 100 Ω Pt(3926) 0.2 °C 0.4 °C 0.015 %+0.18 °C 0.03 %+0.36 °C 0.2 °C 0.4 °C 0.015 %+0.18 °C 0.03 %+0.36 °C 0.2 °C 0.
RTD Calibrator Specifications Loop Power Supply Open circuit voltage: 24 V ±10 % Loaded circuit voltage: 18 V minimum at 20 mA current Short circuit protected General Specifications Maximum voltage applied between any terminal and earth ground or between any two terminals: Operating temperature Storage temperature Operating altitude Storage altitude Relative Humidity (% RH operating without condensation) Vibration Requirements Drop Test Requirements IP Rating Electromagnetic Environment Safety Power Suppl
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