UNI-T UT805

49
Model UT805: OPERATING MANUAL
A. DC Voltage (Calibrate both positive and negative
polarity)
CALIBRATION PROCEDURE
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The calibration must be done in manual ranging
mode.
Power-up the Meter and allow it to stabilize for one
hour.
The accuracy of the original source must be 1/3 better
than the calibrated range
Short circuit the test lead, press REL to
display “0”, input 1000V, then press CAL
button.
The Meter displays: (--CAL--) (-HI-END)
(1000.00V), calibration finished
1000V :
Short circuit the test lead, press REL to
display “0”, input 190mV, then press CAL
button.
The Meter displays: (--CAL--) (-HI-END)
(190.000mV), calibration finished.
Short circuit the test lead, press REL to
display “0”, input 1.9V, then press CAL
button.
The Meter displays: (--CAL--) (-HI-END)
(1.90000V), calibration finished.
200mV:
2V :
Short circuit the test lead, press REL to
display “0”, input 19V, then press CAL
button.
The Meter displays: (--CAL--) (-HI-END)
(19.0000V), calibration finished.
Short circuit the test lead, press REL to
display “0”, input 190V, then press CAL
button.
The Meter displays: (--CAL--) (-HI-END)
(190.000V), calibration finished
20V :
200V :