Analog Output Settings-Zero, Range, And Attenuation; Analog Zero; Procedure: Zeroing Signal Output - Agilent Technologies 6890 Series Operating Manual

Signal Handling
Analog output settings—zero, range, and attenuation
Analog output settings—zero, range, and attenuation
If you use an analog recorder, you may need to adjust the signal to make it more
usable. Zero, Range, and Attn in the Signal control table do this.
Press [Signal 1] or [Signal 2].

Analog zero

This is used to correct baseline elevation or offsets. A common application is to
correct a baseline shift that occurs as the result of a valve operation. After
zeroing, the analog output signal is equal to the Value line of the control table
minus the Zero setpoint.
Zero can be programmed as a run time event. For details, see chapter 7.

Procedure: Zeroing signal output

1. Verify that the detector is on and in a ready state.
2. Press [Signal 1] or [Signal 2] to access the signal control table.
3. Scroll to Zero.
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Subtrracts value entered from baseline
(press [On] to set to current
or [Off] to cancel)
Scales data coming from the detector
(Valid setpoints are 0 to 13, depending
on detector type)
Scales presentation of output to
strip chart recorders
(Valid setpoints are 0 to 10)
Press [On] to set the
current signal (15 in
this case) or enter a number.
Value