MEATEST
M-140 Multifunction Calibrator
Operation manual v46
83
10.
Perform AC/DC high current test on range 20 A according to the table VIII. Deviation should not exceed
specified limit.
11.
Connect standard powermeter to the appropriate output and current terminals of the calibrator.
12.
Perform AC/DC power test according to the table IX. Deviations should not exceed specified limits.
13.
Connect voltage terminals of the calibrator to the Hi/Lo and Sense H/L terminals respectively of the standard
multimeter. Set resistance mode on multimeter and calibrator as well. Use four-wire technique for connection
of multimeter for testing on nominal values below 10 kOhm. Use autozero function of standard multimeter to
eliminate thermoelectric voltages and residual resistances of multimeter and cables before measuring.
14.
Connect adapter Option 70 to the AUXILIARY connector. Perform resistance test according to the table X.
Deviations should not exceed specified limits.
15.
Connect voltage terminals of the calibrator to the RCL meter. Switch GND U and GND I OFF in SETUP
MENU (In common RCL meters measuring circuit must not be grounded). Connect source terminal of RCL
meter to the Lo output terminal of the calibrator.
16.
Perform capacitance test according to the table XI. Deviations should not exceed specified limits.
17.
Connect output voltage terminals of the calibrator to the counter. Set output voltage 1 VAC, frequency 1 kHz.
18.
Perform frequency test according to the table XII. Deviation should not exceed specified limit.
19.
Connect Option 40 cable adapter to the auxiliary connector on the front panel. Connect Lo banana of the
adapter to the Lo output terminal on the calibrator. Connect Hi banana of the adapter to the Hi output terminal
on the calibrator. Set appropriate value of frequency and DC voltage range 20V on the calibrator (frequency
and 10 V DC range on build in meter) according to the table XIII.
20.
Perform multimeter test in points FREQUENCY 1000Hz and 10 VDCV. Deviations should not exceed limits
in the tables below.
Note :
Because accuracy of calibrator output is not accurate enough in all points, use external standard
counter (frequency) or multimeter (DC voltage) connected in parallel to the output terminals to
obtain exact value on the output.
21.
Connect Option 40 cable adapter to the +I, -I output terminals of the calibrator. Set appropriate value of output
DC current.
22.
Perform multimeter test on range 25 mA DC, i.e. point 19 mA DC (see table of limits) according to the table
XIII. Deviation should not exceed specified limit.
23.
Connect Option 60 cable adapter to the auxiliary connector on the front panel. Set in SETUP MENU of built-
in meter function DC voltage, range 2V. Connect together Hu and Lu terminals (banana) of the adapter to
make short and use ZERO function of the meter to reset zero point of the meter.
24.
Connect terminal Hu of the adapter with output terminal Hi on calibrator. Connect terminal Lu of the adapter
with output terminal Li on the calibrator.
25.
Set appropriate values of DC voltage on the calibrator according to the table XIII and perform test of meter
DC voltage ranges 20mV, 200mV and 2V. Deviation should not exceed specified limit.
Note :
Because accuracy of calibrator output is not accurate enough in all points, use external standard
multimeter connected in parallel to the output terminals to obtain exact value of DC voltage on
the output terminals.
26.
Disconnect Option 60 from output terminals Hi, Li. Set resistance function in SETUP MENU of build-in
meter. Make four-wire short on the Option 60 banana terminals. Use ZERO function of the build-in meter to
exclude parameters of the adapter. Connect standard resistor 100 Ohm to the adapter. Use four-terminal
technique.
27.
Perform multimeter test on resistance range 200 Ohm according to the table XIII. Deviation should not exceed
specified limit.
28.
Use the same procedure to test resistance range 2000 Ohm.