Entering Specific Zero And Gain Values - HP 5890 SERIES II Service Manual

6. After a short time, GAIN A (or GAIN B) is again displayed, followed by the observed flow rate
and a new GAIN calibration value based upon the measured flow rate.
The displayed flow rate value should now be quite close to the measured flow rate
value. If not, drift may have occurred. If drift occurs, the process should be repeated.
7. This completes EFS calibration. Remove the flow- measuring adapter, connect the channel
OUT fittings (use two wrenches in opposition to avoid twisting tubes), replace the left side pan-
el, and restore the instrument to service.

Entering Specific ZERO and GAIN Values

Calibration values for ZERO and GAIN should be recorded when a particular channel is calibrated.
They can then be reentered through the keyboard if necessary, without repeating the entire calibration
procedure.
To enter specific ZERO and GAIN calibration values:
1. Select CALIB AND TEST mode, function 2:
.
2
CLEAR
GAIN A (or GAIN B) is displayed, followed by two values (the observed flow rate through the channel
and the current GAIN calibration value for the channel).
Note that Channel A is assumed by default. If Channel B is to be calibrated instead,
press .
B
2. Enter the desired GAIN calibration value, preceded by
is necessary to signify entry of a GAIN calibration value, rather than a measured flow rate.
-
3. Press : FLOW A ZERO is displayed, followed by a value (the current ZERO calibration
ZERO
value for EFS Channel A).
Note that Channel A is assumed by default. If Channel B is to be calibrated instead, press
4. Enter the desired ZERO calibration value:
Note that alternately pressing
the GAIN calibration value for the given channel (A or B).
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NOTE
ENTER
NOTE
or
ZERO FLOW
SVC 3- 24
:
-
{ }
- ENTER
(#)
{ }
ENTER
(#)
displays either the ZERO calibration value or
.
B