Adjustment: Dc Current Accuracy - Tektronix DM2510 Service Procedure

4 .
Adjustment:
a.
b.
C.
d .
e.
f.
g .
h.
i .
j .
k .
1 .
m.
n.
.
q.
DC Current Accuracy
Set the DMM in the DCA , 200 μA range .
Use the DMM with open jacks .
Press the DOWN and UP of Autoranging keys simultaneously. The
DMM will then calibrate the positive and negative offset.
DM2510/ DM2510G
Page 14 of 17
After writing the new settings in EEPROM the readout will show :
" doNE "
A few seconds later , the readout returns to 0.00 µA . The offset
calibration of the 200 µA range is now completed (see table 6 ).
Repeat the steps a through e for the remaining DCA ranges .
Connect the DC Current calibrator to the LOW and mA jacks.
Set the DMM in the DCA , 200 μA range.
Set the calibrator to +190.000 μA .
Press the DOWN and UP of Autoranging keys simultaneously . The
DMM will then calibrate the positive gain .
After completion of the calibration the readout will show : " doNE " ,
and the positive gain is now successfully written in EEPROM .
As a result , the DMM display should now read +190.00 µA ± 1
count.
Apply -190.000 μA to the DMM .
Press the DOWN and UP of
Autoranging keys simultaneously .
The DMM will then calibrate the negative gain .
After completion of the calibration the readout will show : "doNE " ,
meaning that also the negative gain is now successfully stored .
Repeat steps h through p for 2 , 20 , 200 , 2000mA and 10A DC
ranges according to the settings in Table 6 .
For 10A , make sure that the DC current calibrator is connected to
the LOW and A input jacks and the DMM is set to A mode .
Adjustment Procedure
May 6 , 1994
Revision A
1