MEATEST, s.r.o.
M-142 Multifunction Calibrator
User Manual v54
59
Full calibration procedure
Following pages describe procedure of the full calibration.
Required instruments:
Following instruments are required for calibration:
•
81/2 digit multimeter type HP3458A or Fluke 8508A, or other type with accuracy 0.001 % on DC voltage
•
Resistance shunt 10 m
, 100 m
Burster 1280, or other type with accuracy 0.01%
•
Resistance standard 100
, 1000
Burster 1228, 1229, or other type with accuracy 0.005%
•
RLC Agilent/HP 4263A, Agilent/HP4278A, Agilent/E4981A, or other with accuracy 0.1 %
•
Counter Agilent/HP 53181A, Agilent/HP 53130, or other with accuracy 0,001 %
•
Powermeter 0.02- 0.05 %, Zimmer LG95 or better
HP8903A Distortion analyzer and scope with bandwidth min. 20 MHz are recommended for THD measuring of
AC signals.
Calibration procedure
1.
Connect the calibrator and the multimeter to the mains and let them switched on for at least three hours
in a laboratory at 23
1
o
C.
2.
Press SETUP display button to call up the setup menu and then CALIB display button to call up the
calibration menu.
3.
Enter the calibration code and press ENTER (default calibration code is “00000”).
4.
DC voltage ranges calibration
a)
Connect the voltage input terminals of the multimeter to the Hi - Lo output terminals of the
calibrator.
b)
Select VOLTAGE DC from the calibration menu and confirm by pressing SELECT button.
Switch M-142 output terminals ON.
c)
Follow the instructions provided on the calibrator’s display and the DCU table to adjust the
calibrator’s output in the calibration points.
d)
To adjust the calibrator’s output in the calibration points, press SELECT button and use
,
,
,
cursor buttons or potentiometer to adjust output voltage. Confirm correctly set value by
pressing WRITE display button. If you want to skip the calibration point whose calibration you
have already entered, press SKIP display button.
e)
Switch output terminals OFF
5.
AC voltage ranges calibration
a)
Select VOLTAGE AC from the calibration menu and confirm by pressing SELECT button.
Switch M-142 output terminals ON.
b)
Follow the instructions provided on the calibrator’s display and the ACU table to adjust the
calibrator’s output in the calibration points.
c)
To adjust the calibrator’s output in the calibration points, press SELECT button and use
,
,
,
cursor buttons or potentiometer to adjust the output voltage. Confirm correctly set value
