CALIBRATION (cont.)
B.
Set the Coarse Zero and Span controls to the marked label position (<, Min>).
C.
Position the front panel switches to the desired settings for the application. Refer
to Fig. 2 for details. Connect readout device (i.e. voltmeter) to ANO & A Common.
D.
With the transducer unloaded, adjust the Coarse Zero and the Fine Zero control until
the desired analog output is achieved. If greater zero authority is desired, place the
front panel Switch 7 - "Zero Adj" to the extended range. This will allow the user to obtain
100% zero offset control. The Normal postion of switch 7 allows for approx.
25% Zero authority.
E.
Apply a known dead weight value which is greater than one half of full scale
in the positive direction or activate the "SHP" terminal (shunt positive) by connecting
"SHP" to "Power Common" as described in Fig. 3. Adjust Coarse Span to obtain your
nominal full scale analog output. Use Fine Span control to adjust the signal to the
precise value required (or for an analog value that correspondes with the
appropriate Shunt Calibration value). Unload the transducer and check "Zero"
and adjust as necessary. Repeat Span load and verify values. If the transducer is to be
also used in the negative realm, load the transducer in the negative direction with the
the same dead weight value or activate the "SHN" (shunt negative) and adjust the
Symmetry control until you obtain the proper negative output reading.
F.
Repeat step (e) as needed to obtain analog output precision. Note that
any Span (gain) adjustments will effect the Zero (balance) value.
Note: When appling the SHUNT resistor value for calibration, the sensor should be in an
"unloaded" condition.
When completed, replace the plastic front cover to its original position and ensure connections and
proper shielding to the module, and to the DIN rail to which the AP5103 is attached, are correct.
Fig. 3 Shunt Connections
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