The Interface Solution Experts 39
SPA
2
Programmable Current/Voltage
Limit Alarm Trips
Note:
Once you have configured all parameters, download
to the unit by selecting “Download” in the Transfer
dropdown menu located in the Status Bar. Or, click
the button in the Tool Bar.
You may also use the
Quick Set feature to configure
your
Analog Output parameters and download the
settings.
Configure your parameters and click the
Quick Set
button in the window. Or, you may click the but-
ton, located in the Tool Bar. The settings you have
chosen will be applied and downloaded to your unit.
Output Current / Voltage–
Displays the value pres-
ently at your output.
Trimming–
Output Trimming increases the accuracy
of your instrument by calibrating its analog output to
the device that is receiving the output. This ensures
that the instrument is being correctly interpreted.
Refer to Figure 25 for hook-up.
1.
Click the “Lower” button to trim the Lower
Output Range.
2.
To “fine tune” trimmed values, place the value
read on the external multimeter, connected to
your instrument for trimming, in the “Measured
Loop Current / Output Voltage” text box and
click “Trim”.
3.
Click the “Upper” button and repeat Step 2 to
trim the Upper Output Range.
4.
Once you have perfomed your output trimming,
click “Unfix”.
Note:
Do not click the “Reset” button in the Trimming
menu unless you want to disregard your trimmed
values and return to the manufacturer’s trim values.
Output Test–
This test may be performed in order to
check output performance and accuracy and to trim
other instruments in your setup. Your output will be a
current value, in mA, or a voltage equal to the value
you enter into the text box. You can check the other
devices on the system and calibrate them to this
signal.
This feature is independent of the input. If you find
that the output requires adjustment, you may perform
the Trimming function.
1.
Ensure that SPA
2
monitoring is stopped. In
the “Fix current / voltage” text box, enter a
value between 0-20mA (for current) or 0-10V
(for voltage) and click the “Fix” button.
2.
Return to monitoring the SPA
2
. You will see
the “fixed” value in the “Output Current /
Voltage” display and on the external
multimeter.
3.
Once you have finished, click “Unfix”.
Note:
While performing Analog Output Trimming functions,
you may notice a message in the “SPA 2 Status”
display reading “**OUTPUT FIXED**”. Clicking the
“Unfix” button will clear this message.
