MEATEST, s.r.o.
M-142 Multifunction Calibrator
User Manual v54
61
e)
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
by pressing WRITE display button.
f)
Shunt should be used on 2A, 10 A ranges.
9.
AC power ranges calibration
a)
DC power ranges calibration is performed by calibrating 20 mA, 200 mA, 2 A, 20 A AC
current ranges. There is no need to calibrate the voltage ranges.
b)
Select POWER DC from the calibration menu.
c)
Connect a standard ammeter to calibrator’s output terminals +I - -I
d)
Follow the instructions provided on the calibrator’s display and the POWER AC table to adjust
the calibrator’s output in the calibration points.
e)
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
by pressing WRITE display button..
f)
Shunt should be used in 2A, 20 A ranges.
10.
Resistance ranges calibration
Resistance ranges calibration is performed by both calibration methods, i.e. setting the checked value
and measuring this value with the standard instrument, as well as setting the nominal value of the
calibrator’s measurement range on the external multimeter by adjusting the calibrator’s output. If the
entry of measured value to the calibrator is required, VALUE METER is displayed at the respective
calibration point. The value on the calibrator’s display has the same format as the nominal value of the
respective calibration point on the display. If, on the other hand, the user is requested to adjust the
calibrator’s output to set the nominal value of the calibrator’s measurement range on the external
multimeter, VALUE is displayed at the respective calibration point. The value on the calibrator’s
display has general format.
a)
The calibrator have to be calibrated using adapter Option 70, in four-wire connection in range
below 100 k
. Connect adapter to the AUXILIARY connector. Select RESISTANCE from the
calibration menu
b)
Select four-wire resistance measurement function on the external multimeter. Adjust the zero
value of the external multimeter including the cables, if necessary.
c)
Connect all four wires of adapter Option 70 to the input terminals of external multimeter. Use
four wire technique. Connect correct terminals and wires.
d)
Measure the resistance in the recommended calibration points using the multimeter and write
the values into the calibrator. Use numeric keyboard, potentiometer or cursor buttons to enter
the value.
e)
Perform the adjustment for all calibration points as usual. Press WRITE display button to
confirm correct values.
f)
Disconnect adapter Option 70 from AUXILIARY connector.
g)
Connect standard multimeter directly to Hi - Lo output terminals. Repeat steps d) to f) for
resistance calibration points above 100 k
.
