OPERATION
External Feedback
1. Turn zero check on.
2. Press the SHIFT button and than the VOLTS button. The VOLTS
and AMPS indicator lights will turn on.
3. Connect the external feedback element from the PREAMP OUT bind-
ing post to input HI as shown.
4. Apply the signal to the triax input connector.
5. Turn zero check off.
“SUPPLIED INPUT CABLE
MODEL 617
Fig 3. External Feedback
NOTES
1. The negative of the voltage drop across the feedback element will be
displayed.
2. To exit the external feedback mode, turn zero check on, remove the
feedback element and prass any FUNCTION button.
TYPICAL USE
External feedback can be used if non-decade or logarithmic current gain
is required, or added coulombs capability is necessary.
30
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