I/O Module Configuration; Analog Inputs - ABB SM2000 User Manual

Advanced Videographic Recorder
SM2000

4.7 I/O Module Configuration

Fig. 4.16 I/O Module Configuration
Note. The instrument detects the type of module fitted in each position automatically.

4.7.1 Analog Inputs

94
I/O
Modules
Set the mains rejection frequency used to 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.
Note.
Input adjustment frames appear only if recording is
enabled during configuration, i.e. the 'Disable recording in
configuration' check box is
Configuration level – see Fig. 4.1, page 46.
Changes to the Analog Input Type (see Section 4.6.2,
page 80) must be saved to the current configuration
before commencing input adjustment.
Actual value / Desired value
1. Adjust the process or simulated input signal to a known
value below 50% of the engineering range.
2. If 'Actual value' (in engineering units) is different from
expected, set 'Desired value' to the correct value ('Offset
adjust' and
automatically).
3. Repeat steps 1 and 2 for a value above 50% of the
engineering range.
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.
4 CONFIGURATION
ticked on entry to the
not
'Span adjust' values are
IM/SM2000
calculated
Issue 11