THM420 Adjustment Procedures
Handheld and Benchtop Instruments Basic Service
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11. Turn the rotary switch to mA
.
12. Press the METER/SCOPE button to select SCOPE mode.
13. Set the AC/DC button to DC.
14. Set the vertical offset (POS) to 0 mA.
15. Set the vertical SCALE to 2 mA.
16. Adjust R86 to align the trace to the display center.
R80
R86
R84
Figure 4: Adjustment Locations