Figure 22. Null/Span Configuration screen
To Measure:
Analog Voltage Output: Connect the voltmeter between terminals 10 or 16 (+) and 17 (–).
Analog Current Output: Connect the ammeter between terminals 10 or 16 (–) and 1 (+).
Analog Output Type
Null
Span
Minimum
Maximum
Minimum
Maximum
Voltage
10 mV
2.3 V
4.8 V
10.1 V
Current
3.9 mA
7.8 mA
11.9 mA
20.2 mA
Adjust the Null and Span ranges as follows:
1. To read the new values on the meter, click Null or Span Update.
2. Click OK to save the new settings and return the program to the PSF Configuration screen. Clicking Cancel returns
the program to the previously saved null and span settings.
Note: Null and Span are factory set to specified values and usually require no changes.
Scan # provides a way to smooth output response and avoid unstable analog output conditions. The menu allows selection
of 1 to 9 scans. For analog outputs, if scan # is set at more than 1, the scan analysis value is averaged for all of the selected
number of consecutive scans, preventing dips and spikes in the outputs.
For total beam values (TBB and TBM analysis modes), programming of blanked beams will affect the proportional analog
outputs. Blanked beams are ignored both in the number of blocked or made beams and the total number of beams. For
example, if a 64-beam array has 20 blanked beams and 22 of the remaining 44 beams are blocked, the output values will be
at mid-range.
4.3.6 Zero Value
Zero value is used to specify the analog output when the measurement mode value is zero. Select an analog output of Last,
Null, or Span.
Last: Output holds the last non-zero value before the light screen became clear.
Null: Provides the minimum value.
Span: Provides the maximum value.
4.3.7 Discrete Output Configuration (Analysis Mode Assignment)
Discrete outputs #1 and #2 (Alarm) may each be individually assigned to one of the Scan Analysis Modes programmed in
(p. 22).
A-GAGE
®
High-Resolution MINI-ARRAY
®
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