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...4 CONFIGURATION
4.7 I/O Module Configuration
Note. The instrument detects the type of module fitted in each position automatically.
4.7.1 Analog Inputs
80
Fig. 4.19 I/O Module Configuration
Set the mains rejection frequency used to filter electrical
noise induced on the signal lines by power supply cables.
Input Adjustment
Manually fine-tune inputs to remove process offset errors or
system scale errors.
Notes.
• Input adjustment frames appear only if recording is
• Changes to the Analog Input Type (Section 4.6.2) must be
Actual value / Desired value
1) Adjust the process or simulated input signal to a known
2) If 'Actual value' (in engineering units) is different from
3) Repeat steps 1 and 2 for a value above 50% of the
4) Repeat steps 1 to 3 for each input.
Reset adjustment
Select to reset 'Offset adjust' and 'Span adjust' (see next
page) to zero and to 1 respectively.
enabled during configuration, i.e. the 'Disable recording in
configuration' check box is
Configuration level – see Fig. 4.1, page 39.
saved to the current configuration before commencing
input adjustment.
value below 50% of the engineering range.
expected, set 'Desired value' to the correct value ('Offset
adjust' and 'Span adjust' values are calculated
automatically).
engineering range.
ticked on entry to the
not
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