Scaling Without Known Loads; Natural Gain; Input Resolution Multiplier - Omega DP25B-E User Manual

4.3.2 Scaling Without Known Loads

To scale without known inputs, calculate input values based on the transducer
specifications and manually enter them on the front-panel pushbuttons. The following
example assumes a pressure transducer with these specifications:
Pressure Range:
Output Span: 1 to 5 Vdc
Determine the correct values for IN1 and IN!2 based on the transducer
1.
specifications. In most cases, RD1 & RD!2 are equal to the minimum and
maximum of the transducer output span. The example assumes RD1 & RD!2 are
equal to the pressure range of the transducer (RD1 = 0000 and RD!2 = 2000).
Calculate IN1 and IN!2 using the transducer output span and the following
equation:
IN = (Sensor Output) x (Natural Gain) x (Multiplier).
Input Range
0 to 100 mV
±50 mV
0 to 10 V
0 to 20 mA
Determine the multiplier by the Input Resolution setting (R.2 in the RD.CF menu)
2.
and the input range selected. Typically R.2=4 is suitable for most applications.
Input Range
0 to 100 mV
0 to 10 V
0 to 20 mA
± 50 mV
± 5 V
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0 to 2000 PSI
Table 4-3. Natural Gain
Span Units
Millivolts
Millivolts
Volts
± 5 V Volts
Milliamps
Table 4-4. Input Resolution Multiplier
R.2=4 R.2=3
1.000 2.000
1.000 2.000
1.000 2.000
1.000 1.000
1.000 1.000
Configuring The Meter

Natural Gain

100 cts/mV
40 cts/mV
1000 cts/V
400 cts/V
500 cts/mA
R.2=2 R.2=1
3.333 5.000
3.333 5.000
3.333 5.000
1.667 2.500
1.667 2.500
4
R.2=0
10.00
10.00
10.00
5.000
5.000
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