Galvanic Applied Sciences 943-TGS, Operation Manual

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Revision 1 108 6/27/2017
12.3.1 Analog Output Fields
Each Analog Output box allows the user to configure, calibrate and test an analog output.
12.3.1.1 Calibrating and Testing the Analog Outputs
To test or calibrate any I/O point, first click on the
Direct Peripheral Board
Control
checkbox.
To configure/calibrate/test an Analog Output:
a) Place a check mark in the
Calibrate Analog Output x
check box (the approach is the
same for all four boxes). The fields within the box will become active.
b) Enter the desired Zero and Span values for the output in the
Scaled Value/Zero
and
Span
fields. For example, if the output is to represent 0 - 2 % H2S, enter 0 in the
Zero
field and 2 in the Span field.
c) Connect a milli-ammeter to
Analog Output x
. Note that the analog outputs require
external loop power.
d) Press the
Output Zero
button. The analog output will attempt to output 4 mA, however it
may not read exactly 4.
e) Enter the reading from the meter in the Meter Reading field and press the Auto Cal
button. This will adjust the
Zero
output to exactly 4 mA.
f) Press the
Output Span
button. The analog output will attempt to output 20 mA, however
it may not read exactly 20.
g) Enter the reading from the meter in the Meter Reading field and press the
Auto Cal
button. This will adjust the Span output to exactly 20 mA. The analog output is now
calibrated.
h) Test the output by entering the desired mA output in the
Test(mA)
field and then pressing
the Output Test button. This will force the analog output to generate the entered value.
In this way the analog output loop can be tested at several readings such as 0, 25, 50, 75
and 100 % of scale (4, 8, 12, 16 and 20 mA).
i) Once the Zero value and Span values have been tested, press the Capture button to
implement the changes.
j) Press
Permanent Save
.