Extech Instruments PRC70 User Manual

Multifunction process calibrator

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User Guide

Multifunction Process Calibrator

Model PRC70

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Page 1 User Guide Multifunction Process Calibrator Model PRC70...
Page 2 Thermocouple measurement/source terminals and built-in lead connector (with RJ compensation) Manual step source, auto-step, and sweeping-step source Room temperature monitoring for all operations Measurement/source temperature monitoring function Measurement/source mA% display Measurement wave-filter function Measurement manual-hold function Page 2 PRC70-EN-V2.1 12/11...
Page 3: Warranty And Support Information
Warranty EXTECH INSTRUMENTS CORPORATION (A FLIR COMPANY) warrants this instrument to be free of defects in parts and workmanship for one year from date of shipment (a six month limited warranty applies to sensors and cables). If it should become necessary to return the instrument for service during or beyond the warranty period, contact the Customer Service Department at (781) 890-7440 ext.
Page 4: Safety Information
For the correct and safe use of the instrument, be sure to follow the cautionary notes stated in this manual whenever handling the instrument. Extech Instruments shall not be held liable for any damage resulting from use of the instrument in a manner other than prescribed in the cautionary notes.
Page 5 Measurement Signal（+）：mADC 3W Terminal：measurement terminal of the 3W OHM, RTD LOOP Terminal：+24VDC Loop Power Terminal Source Signal:（+）DCmA Source Signals：（-）OHM、RTD Common (COM) return（-）terminal for source functions Source Signal（+）DCV, OHM, TC, RTD, XMT, FREQ, CYC, and SWITCH Source Signal:（-）mADC Page 5 PRC70-EN-V2.1 12/11...
Page 6 Convert sourced TC temperature and mV, and sourced RTD temperature and Ohms. LOOP Key 24v Loop circuit power: Convert the measured TC temperature and the mV, the measured RTD temperature and the Ohms. In DCmA source mode, select auto-wave; In frequency/pulse source mode, set amplitude Page 6 PRC70-EN-V2.1 12/11...
Page 7: Display Screen
Source Mode icon s. Source function ON Source function OFF u. Set -point for source v. RUN icon for auto-step and auto-sweep w. Unit of measure for setpoint of source x. Not used y. Not used Page 7 PRC70-EN-V2.1 12/11...
Page 8: Precautions For Safe Use Of The Instrument
“Specifications” section to the given accuracy rating. When using the instrument at an ambient humidity of 30% or lower, prevent electrostatic charges from being produced by using an antistatic mat or other alternative means. Page 8 PRC70-EN-V2.1 12/11...
Page 9 Step 2: Insert the plug of the optional Charger into the Charger connection jack. Notes: Switch OFF the calibrator before connecting or disconnecting the Charger from AC power. Unplug the Charger from the Charger connection jack of the calibrator when discharging. Do not charge the calibrator without batteries installed. Page 9 PRC70-EN-V2.1 12/11...
Page 10 Press the backlight key to switch ON the backlight; press again to switch it OFF. Battery life is shortened by backlight overuse. Notes: The backlight automatically switches OFF after 30 seconds. The time can be programmed or reset to the factory default condition, see the “Programming the Global Settings” section. Page 10 PRC70-EN-V2.1 12/11...
Page 11: Connecting Cables To Terminals
For DC voltage, thermocouple, frequency, pulse or contact outpuf0 -0.07(sd)4.9(e)-1 Figuare5() ) ] T JT * 0 Tc0 Tw( )TjT * 0.0002 Tc For DC(curre)5.4(nt07(n)54(ee Figua )6( 6() )] T JT* 0 Tc0 Tw( )TjT* 0.0002 Tc-0.0026 Tw(Step 1:g )Tj/TT2 1 Tf)3.0488 0 TD[ ( oin)5.5i Page 11 PRC70-EN-V2.1 12/11...
Page 12 Step 3: Pressing the (ON) key causes the indicator on the LCD to change from ‘’OFF‘’ to ‘’ON ‘’. The calibrator sources the preset DC voltage between the output terminals. Step 4: To switch OFF the output, press the (ON) key again. The OFF icon appears on the LCD. Page 12 PRC70-EN-V2.1 12/11...
Page 13 The ability to use the (START) key to start mA auto-stepping and auto-sweeping mode is only available when the source function is in the ON state. Starting the mA auto-sweeping mode switches OFF the measurement mode. The mA auto-stepping mode and the measurement function cannot run simultaneously. Page 13 PRC70-EN-V2.1 12/11...
Page 14 Page 14 PRC70-EN-V2.1 12/11 part of the4LCD) as described in the4following equation.4 100 (current measured value4mA-4mA) 7.3.34mA% display In the4mA source4mode, press the4(RANGE) key to convert the4preset source4value to mA%4mode (shown on the4lower4...
Page 15 Page 15 PRC70-EN-V2.1 12/11...
Page 16 The calibrator offers a temperature monitor function for easily observing the resistance value sourced between the output terminals. In the RTD source mode, press the (START) key and the LCD will show the resistance value sourced between the output terminals. Press (START) again and the LCD will show the preset temperature value. Page 16 PRC70-EN-V2.1 12/11...
Page 17 Increasing the digit from 9 or decreasing it from 0 causes the digit to overflow or underflow, allowing the output value to be set without interruption. Holding down the〔〕/〔〕key changes the digit quickly. The value won’t change if it is increased or decreased to the Maximum or Minimum value. Page 17 PRC70-EN-V2.1 12/11...
Page 18 During the pulse sourcing process, pressing the (START) key causes the calibrator to switch the output OFF; the “RUN” icon switches OFF also. Press the (START) key again to restart the sourcing function. Restarting the pulse output requires that the source function be in the ‘’ON ‘’state. Page 18 PRC70-EN-V2.1 12/11...
Page 19 7.10 Zero-off function For any DC voltage, DC current, Resistance (ohms), TC (thermocouple) or RTD range, pressing the (ZERO) key initializes the preset source value. In the frequency, pulse, and contact output modes, the (ZERO) key is unavailable. Page 19 PRC70-EN-V2.1 12/11...
Page 20 Figure 11 - Measuring DC voltage, ohms, frequency, continuity and switch Step 2: Connect the other end of the cables to the terminal points of the equipment under test while ensuring that the polarities are correct. Page 20 PRC70-EN-V2.1 12/11...
Page 21 Connect the red lead cable to the “VHzTcΩRTD” input terminal. Step 2: Connect the three clips of the cables to the measuring terminals of the equipment under test ensuring that the polarities are correct. Figure 14 - RTD signal with 3w method Page 21 PRC70-EN-V2.1 12/11...
Page 22: Measuring Dc Voltage
LCD). See the equation below. 100 (current measured value mA-4mA) mA %= 16 mA Press the key again to return to the measured value, shown on the upper area of the LCD. (RANGE) Page 22 PRC70-EN-V2.1 12/11...
Page 23: Measuring Resistance
LCD. Notes: The TC measurement function is unavailable if the TC/RTD source function is ON. If there has been a sudden change in the operating ambient temperature of the calibrator, wait until the built-in reference Page 23 PRC70-EN-V2.1 12/11...
Page 24: Measuring Frequency
Step 4: Using the measurement (RANGE) key, select the suitable range (500Hz, 5KHz, 50KHz).The selected function, the measured value, and the unit of measure are shown in the upper part of the LCD. Note: The frequency measurement function is unavailable if the frequency, pulse, contact or pressure source function is ON. Page 24 PRC70-EN-V2.1 12/11...
Page 25: Measuring Continuity
〔〕/〔〕key equals one 10 -minute increment or decrement. Press and hold a key to scroll quickly. Step 3: To save the setting, press and hold the SOURCE (ON) key until the LCD shows the “SAVE” symbol. Note: The default value (0) indicates that the automatic power-off function is disabled. Page 25 PRC70-EN-V2.1 12/11...
Page 26 Step 1: Use the MEASURE (ON) key to display the “FACry” parameter at the top of the LCD (if it’s not already displayed). Step 2: Press the SOURCE (ON) key to revert to the default values as shown below: AP.OFF: 10 minutes BL.OFF: 10 seconds TMP.U: FRSET: 50 Hz CMSET: PCM Page 26 PRC70-EN-V2.1 12/11...
Page 27 11 Calibration Please contact Extech Instruments Corporation for instructions on returning the unit for calibration. 12 Replacing the Batteries or Fuses: Warning To avoid possible electric shock, remove the test leads from the calibrator before open the battery door and ensure that the battery door is tightly closed before switching the calibrator ON.
Page 28: Maintenance
Product specifications subject to change without notice For the latest version of this User Guide, Software updates, and other up-to-the-minute product information, visit our website: www.extech.com Extech Instruments Corporation, 285 Bear Hill Road, Waltham, MA 02451 ISO9001 Certified Page 28...
Page 29: Specifications
0.0°C to 1300.0°C: 0.9°C 1112°F to 1472°F: 4.0°F 1472°F to 1832°F: 3.2°F 1112°F to 3308°F 1832°F to 3308°F: 2.5°F 1°F (1°C) 600°C to 1820°C 600°C to 800°C: 2.2°C 800°C to 1000°C: 1.8°C 1000°C to 1820°C: 1.4°C Page 29 PRC70-EN-V2.1 12/11...
Page 30: Resolution Accuracy
DCV: Normal Mode Rejection Ratio (NMRR) ≥60dB (at 50Hz or 60Hz); Common Mode Rejection Ratio (CMRR) ≥120 dB(at 50Hz or 60Hz) Temperature Coefficient: 0.1 times the applicable accuracy specification per degree C for 5 to 18 and 28 to 40 Page 30 PRC70-EN-V2.1 12/11...
Page 31 The range of the internal temperature compensation sensor is from -10 to 50 , compensation error≤0.5 Maximum voltage between VΩHz terminal and COM terminal: 60 Vp-p; Maximum Input current: 60mA. Protected with a 63mA, 250V fast blow fuse Page 31 PRC70-EN-V2.1 12/11...
Page 32 -418.0°F to 752.0°F 1.1°F (0.6°C) -250.0°C to 400.0°C -328.0°F to -148.0°F: 1.8°F -148.0°F to 1652.0°F: 1.3°F -328.0°F to 2372.0°F 1652.0°F to 2372.0°F: 1.4°F -200.0° to 1300.0°C -200.0°C to -100.0°C: 1.0°C -100.0°C to 900.0°C: 0.7°C 900.0°C to 1300.0°C: 0.8°C Page 32 PRC70-EN-V2.1 12/11...
Page 33 Maximum voltage between any output terminal and earth ground: 30Vpk Maximum output current: Approximately 25mA. Copyright © 2011 Extech Instruments Corporation (a FLIR company) All rights reserved including the right of reproduction in whole or in part in any form.