M-142 Multifunction Calibrator
MEATEST, s.r.o.
64
User Manual v54
•
Make short on calibrator output terminals +I - -I.
•
Press SELECT display button to select the first calibration point, 0 mA.
•
After the value stabilizes, press WRITE display button to write new calibration zero value.
•
Disconnect short on +I - -I terminals. Connect L input wire of adapter Option 40 to the -I
output on the calibrator, H input wire of adapter to the minus current input on standard
multimeter and +I output terminal of the calibrator to the positive current input of standard
multimeter. Calibrator current output, input of the internal multimeter and current input of
standard multimeter are connected in series. If necessary, adjust the zero point of the external
multimeter before calibrating current range.
•
Press SELECT display button to select calibration point, 19 mA. Red LED is lit above
OUTPUT button.
Note:
It can occur, that calibrator beeps and display error message. In this case push the
button OUTPUT ON to switch calibrator output manually.
•
Adjust the calibrator’s output current so that the external multimeter shows 19.0000 mA. After
the value stabilizes, press WRITE display button to write new calibration value. Terminals of
multimeter will switch OFF.
•
Disconnect both the external and built-in multimeter. Disconnect cable adapter Option 40 from
the AUXILIARY connector.
c)
Resistance range calibration
Calibration of both ranges 100 and 1000
consists of following steps:
•
0
calibration
•
resistance range of multimeter calibration
For calibration of resistance ranges external standard 100
and 1000
are required.
Connect to the AUXILIARY connector cable adapter Option 60.
0
calibration
•
Make short of all four Option 60 input wires.
•
Press SELECT display button to select the first calibration point, 0
.
•
After the value stabilizes, press WRITE display button to write new calibration value.
100
calibration
•
Connect resistance standard 100
to the input terminals. Use four-wire technique.
•
Press SELECT display button to select the second calibration point, 100
.
•
After the value stabilizes, write calibration value of resistance standard to the lower line and
confirm by pressing WRITE.
d)
1000
resistance range calibration
•
Make short of all four Option 60 input wires.
•
Press SELECT display button to select the first calibration point, 0
.
•
After the value stabilizes, press WRITE display button to write new calibration value.
1000
calibration
•
Connect resistance standard 1000
to the input terminals. Use four-wire technique.
•
Press SELECT display button to select the second calibration point, 1000
.
•
After the value stabilizes, write calibration value of resistance standard to the lower line and
confirm by pressing WRITE.
