Automatic Zero Compensation (Items 1.5, 1.6, 1.7)
Automatic compensation is initiated by depressing the compensation switch (Item 1.5), i.e. a countervoltage is added to the input voltage automatically until the value 0 is reached at the receiver output. Pilot lamp 1 (Item 1.6) lights for as long as compensation is operative. During this period, the input voltage must not be changed, i.e. the connected probe and the test object must not be moved or moved relatively to each other respectively. Automatic compensation is also initiated when switching over to filter mode TP (low-pass) (please also refer to Section 2.8).
The incorporated drift tracking facility is activated by setting the compensation switch to the upper position.
Tracking of the output voltage to 0 is essentially slower than is the case with compensation. The tracking speed is set at the factory to the highest speed yet can be varied internally in 7 stages by a total of 2! = 128,
During tracking, pilot lamp 1 lights continuously and pilot lamp 2 (Item 1.7) lights following the tracking rhythm which becomes increasingly slower as the 0 point is approached.
When switching over to drift tracking, automatic compensation (as above) is initiated initially.
If pilot lamp 2 lights continuoulsy, the tracking facility has reached its limit. The deviation is excessive.