USER GUIDE Thermocouple Calibrator Model PRC20
Introduction Thank you for selecting the Extech Model PRC20. This device is shipped fully tested and calibrated and, with proper use, will provide years of reliable service. Please visit the Extech Instruments website (www.extech.com) to check for the latest version of this User Guide. Extech Instruments is an ISO-9001 certified company. Safety International Safety Symbols This symbol, adjacent to another symbol or terminal, indicates the user must refer to the manual for further information.
Meter Description 1. AC adaptor input jack 2. Display 3. Power ON/OFF 4. Source output adjustment arrow buttons 5. Set and exit the adjustment mode button 6. Unit button (thermocouple type, °F or °C) 7. I/O button 8. MEM (memory STEP button) 9. Backlight/ZERO button 10. Thermocouple mini-connector Display Layout 1. SOURCE mode icon 2. ZERO function status icon 3. Thermocouple type 4. MEASURE mode icon 5. Auto Power OFF active icon 6. Battery status icon 7.
PRC20-EU-EN-V1.
Keypad Descriptions and Operation POWER BUTTON and AUTO POWER OFF FEATURE 1. Use the POWER button to turn the unit ON or OFF. When the unit is powered up, a short self-test will ensue after which the display will stabilize. 2. When the battery symbol flashes on the display, replace the battery as soon as possible. Low battery power may cause inaccurate readings and erratic meter operation. 3. This instrument is equipped with Auto Power OFF which turns the meter off after 10 minutes of inactivity.
► ◄ ▼ and ▲ BUTTONS The arrow buttons are used to set the output value in the SOURCE mode. 1. Select the SOURCE mode 2. Press the ► or ◄ button select a digit for adjustment. The blinking underline curser identifies the digit selected. 3. Press the ▼or ▲button to adjust the value of the digit. Press and Hold the ▼or ▲ button to rapidly adjust the value. SET BUTTON The SET button is used to manually step through the 5 stored output values. 1. Select the SOURCE mode 2.
STORING VALUES INTO MEMORY There are 5 memory locations for each thermocouple type and for mV. The default values stored in the these locations are: Memory Location Type J, K, C, R, S, N M1 0.0 C o o (32.0 F) M2 o 100.0 C (32.0 F) o 200.0 C o (392.0 F) o 300.0 C o o 500.0 C (932.0 F) o 750.0 C o (1382.0 F) o 400.0 C (752.0 F) 25.00mV o o (572.0 F), 10.00mV o o o (1832.0 F) 0mV o (32.0 F) (212.0 F) (392.0 F) o o 0.0 C 100.0 C 200.0 C 1000.0 C mV o o 750.
Modes of Operation MEASURE (Input) Mode of Operation 1. Turn the meter ON. 2. “MEASURE” will appear in the display. 3. Momentarily press the UNIT button to select °F or °C. 4. Press and Hold the UNIT button for 1 second to change the thermocouple type (or mV). 5. Connect the thermocouple to the meter. 6. Read the measurement on the display. Note: See the keypad description section to turn CJC on/off.
Tilt Stand / Hanger The rear stand is provides two methods for convenience in viewing. 1. Pull the bottom portion of the stand out to place the unit on a flat surface for viewing. 2. Pull the bottom and top portions of the stand out, and then rotate the stand to allow the unit to be hung. Battery Replacement When the battery icon appears on the display, the six AA batteries must be replaced. The battery compartment is located on the rear of the meter. 1.
Specifications General Specifications Display Cold junction compensation Thermocouple Standard and Scale Meter Power Auto Power OFF Operating Temperature Storage Temperature Operating Humidity Storage Humidity Operating Altitude Dimensions Weight Dot matrix LCD 0.02°F per °F (0.
