100/180 mm PAPERLESS GRAPHIC RECORDER: USER GUIDE
HA028910
Issue 13 Sep 16
User Guide
Page 222
4.6.4 Input adjust
Notes
1. Input adjust cannot be applied to input channels with input type of ‘Digital’, ‘Test’ or ‘comms’.
2. Input adjustments can be carried out only by users with ‘Adjust I/O’ permission (
see section 4.4.1
).
3. The instrument must be powered for a suffi cient time (e.g. 30 mins) for it to reach thermal equi-
librium before an input adjust is performed.
This facility allows the user to compensate for tolerance errors etc. The technique used is to select those
channels to which adjust is to be applied, then for each channel to:
a
apply a known low level signal (at or close to the low input range value) to the relevant input. When
the recorder reading is steady, press ‘Apply’.
b. apply a known high level signal (at, or close to, the high input range value) to the relevant input.
When the recorder reading is steady, press ‘Apply’.
Figure 4.6.4a shows the initial display which appears when ‘Input adjust’ is fi rst selected from the SYSTEM
menu. Channels 1 to 6 are selected by default.
Figure 4.6.4a Input adjust status page
First channel
Allows the user to select the lowest channel number of all the channels to be adjust-
ed.
Last channel
Allows the user to select the highest channel number of all the channels to be ad-
justed.
Select Channels
Presents a list of all the channels from the First channel to the Last channel inclusive,
each of which can be removed from the adjustment list by ‘unticking’ its check box.
The channels displayed in the status page refl ect this selection.
Adjust channels
Initiates the adjustment procedure to all the channels from the First channel to the
Last channel inclusive, unless the effectivity is modifi ed using the Select Channels
key.
Remove Adjust
Returns the selected channels to factory calibration
Fast Settle
Switches off the input fi lter for 1 second,to allow quicker response. Adjust Channels’
values displayed as ‘RANGING’ for the 1 second duration.
1) Channel 1 etc.
A list of channels required to be susceptible to the adjustment procedure, together
with their current values and their adjustment status (i.e. Unadjusted or, the time/date
of the previous adjustment (if any)).
1) Channel 1
2) Channel 2
3) Channel 3
4) Channel 4
5) Channel 5
6) Channel 6
Channels to be included
First Channel
1
Select first channel for adjust
Last Channel
6
Select final channel for adjust
Initiate adjust-
ment procedure
1) Channel 1
2) Channel 2
3) Channel 3
4) Channel 4
Remove previ-
ous adjustments
6) Channel 6
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29/07/08 12:11:55
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29/07/08 12:11:55
Unadjusted
Add/Remove
individual
channels from
adjustment list
5.0001
5.0001
5.0001
5.0001
4.998
Adjust Channels
Remove Adjust
Select Channels
Fast Settle
