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CS431 Submersible Pressure Transducer

5.2.1.3 Example CR10X PROGRAM – High Precision Measurement for 5 PSI Sensors

The Standard and Enhanced Measurement Programming Examples (see

Section 5.2.1.1) result in a resolution of ±0.2 inches. These methods use the 25

mV Slow Range of the CR10X. This level of resolution is acceptable for many

measurement needs. However, in the 0 – 5 PSI range, greater resolution is

often needed.

Using the High Precision Measurement Programming Example (below) will

result in a resolution of ±0.03 inches. This uses the 7.5 mV Slow Range of the

CR10X.

In the example below:

Vr = differential voltage at diff channel 1

Vo = differential voltage at diff channel 2

L = pressure measurement in nominal units

P = pressure measurement in psi units using provided calibration values m

and b from calibration data sheet for the specific sensor being used

T = temperature measurement in degrees C

1: Ex-Del-Diff (P8)

1: 1 Reps

2: 3 25 mV Slow Range

3: 1 DIFF Channel

4: 1 Excite all reps w/Exchan 1

5: 1 Delay (units 0.01 sec)

6: 800 mV Excitation

7: 1 Loc [ Vr ]

8: 1.0 Mult

9: 0.0 Offset

2: Ex-Del-Diff (P8)

1: 1 Reps

2: 2 7.5 mV Slow Range

3: 2 DIFF Channel

4: 1 Excite all reps w/Exchan 1

5: 1 Delay (units 0.01 sec)

6: 800 mV Excitation

7: 2 Loc [ Vo ]

8: 1.0 Mult

9: 0.0 Offset

; Calculate L factor

L=100*(Vo/Vr)

; Measure Temperature

3: Temp (107) (P11)

1: 1 Reps

2: 5 SE Channel

3: 2 Excite all reps w/E2

4: 4 Loc [ T ]

5: 1.0 Mult

6: 0.0 Offset (cont.)

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 22

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