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(B) ACV Calibration (Adjust VR2: Model 61-481 and 61-482)
1. Set multimeter to “AC” “V” function.
The [Blue] key toggles between AC and DC
function
2. Set output of AC calibration for 30Vrms 50Hz and connect to
V
•
Hz
and
COM
input terminals on meter.
3. Using a small flat-tipped screwdriver adjust the potentiometer VR2 until the
display reads 30.00
±
1 digit.
Model 61-482 Only:
4. Set the output of AC calibration for 300Vrms 1KHz and connect to V
•
Hz and COM
input terminals on meter.
5. Using a small flat-tipped screwdriver adjust the potentiometer VC1 until the
display reads 300.0
±
1 digit.
6. Disconnect the AC calibrator from the meter.
(C) °C Calibration (Adjust VR3: Model 61-482 only)
1. Set multimeter to “°C” position.
2. Set the output of the thermocouple Calibrator for 0°C K Type and connect to the meter.
3. Using a small flat-tipped screwdriver adjust the potentiometer VR3 until the
display reads 00.0 or –00.0
(D) °F Calibration (Adjust VR4 and VR5: Model 61-482 only)
1. Set the circuit rotary switch to the °F position.
2. Set the output of the thermocouple calibrator for 0°F K Type and connect to the meter.
3. Using a small flat-tipped screwdriver adjust potentiometer VR5 until the
display reads 00.0 or –00.0
4. Set the output of the thermocouple calibrator for 932°F K Type.
5. Using a small flat-tipped screwdriver adjust potentiometer VR4 until the
display reads 932
±
1 digit.
6. Disconnect the thermocouple calibrator from the meter.
Calibration is Complete:
1. Set the case top rotary switch in the OFF position.
2. Replace the case top, make sure that all the gaskets are properly seated and battery leads do not
become pinched between the case halves, and the snap on the case top are engaged.
2. Reinstall the three screws.
Form number TM61480-1-2
Rev 5 July 2002