Time Electronics 1030 Voltage & Current Source - Manual (Page 13)

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1030 Technical Manual P a g e | 13
7.
C alibration
The instrument is calibrated before it leaves the factory and the calibration controls will
not normally require adjustment.
If re-adjustment is considered necessary, and the trimmer range is found to be
insufficient for recalibration, there is a fault with the instrument.
To calibrate the instrument a DVM of 0.1% accuracy is required. It should also be
capable of measuring:
10mV with 10uV resolution
100mV with 10uV resolution
1V with 100uV resolution
100mA with 100uA resolution
10mA with 10uA resolution
Calibration is carried out on the full scale and zero of the 100mV range. By correctly
calibrating this range, the other ranges are also calibrated.
7.1. Preparing for calibration
1
Turn instrument out Off.
2
Switch to 100mV range.
3
Remove cap from top of range switch knob, and loosen the screw inside.
The range switch knob should then be removed.
4
Undo the nut which attaches the output switch to the body of the 1030.
5
Carefully unscrew the rear cover.
6
The main P.C.B. can now be gently eased out of the case.
7
If the module is to be replaced, it can be unplugged now, and the new one fitted.
The 1030 will then need to be recalibrated.
8
The full scale calibration trimmer is next to the module, on the left looking down
at the P.C.B. from the component side. The zero calibration trimmer is in a
corresponding position on the right of the P.C.B. (see Fig. 2).
9
Plug the DVM into the output terminals and turn the output switch to Normal.
10 Turn the output adjustment pot. to zero. The 1030’s output will not go negative,
so the ‘ZERO’ trimmer should be set by first adjusting for a positive output, then
slowly turning back to zero. The zero for the instrument is then set up correctly