FOR CURRENT OUTPUT:
•
•
Connect a digital milliampmeter or equivalent, across the current output terminals.
On the PCA-121 select the “Coarse Range Adj” that corresponds to the maximum input
frequency. Refer to Table - 1 for selection options.
•
•
•
Adjust “4mA ADJ” control for desired “Zero” current (i.e. 4mA).
Inject the full-scale test frequency while adjusting “20mA ADJ” for current equal to SET (SPAN).
Iterate above steps until no change is observed.
FOR VOLTAGE OUTPUT:
NOTE: For proper adjustment of the voltage-output, First
Perform calibration of the current output.
•
•
Connect a digital voltmeter across the voltage output terminals.
On the PCA-121 select the “Coarse Range Adj” that corresponds to the maximum input
frequency. Refer to Table -1 for selection options.
•
•
•
Adjust “VO ADJ” for 0.00 volts).
Inject the test frequency while adjusting “VFS ADJ” for voltage equal to SET (SPAN).
Iterate above steps until no change is observed.
Control and Adjustment Detail for the PCA-121
PA1001A – 7/02
Page 10 of 11
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