ACR Electronics SmartReader Plus Manuel d'utilisateur télécharger pdf (Page 35)

SmartReader Data Logger

as (A). The reading should be close to zero if you are using a gauge sensor, or close to

ambient pressure (AP) if you are using an absolute sensor.

5. Enter a Low calibration value using:

· For absolute sensor: -(A-AP)*100/FS

· For gage sensor: -(A*100/FS)

Where:

A = The Realtime reading (in PSI) observed in previous step.

AP = Ambient pressure.

FS = Full scale rating of the logger.

NOTE: Make sure you enter the Low calibration value before going to the next

step.

7. Connect the input port of the logger to the calibrator, ensuring all connections are

completely airtight.

8. Adjust the calibrator to produce a test pressure equal to the full scale (FS) range of the

logger. Record the pressure reading you see as (B).

9. Enter a Mid calibration value using:

· (FS/B-1)*100

Where:

FS = Full scale range of the logger.

B = The real-time reading

10. Save the calibration changes to the logger.

1.6.4 Specifications

The following specifications apply to the pressure sensors used in the SmartReader 4:

Type: Silicon piezoresistive strain gauge

Max. Pressure: 4 x FS

Media: Noncorrosive gases and dry air

Temp. Range:

Operating: -40 to 70°C (-40 to 158°F)

Compensated: 0 to 70°C (32 to 158°F)

Accuracy: 0.5% FS @ 25°C (77°F)

Thermal: over Compensated Range

5 PSI ±1.5% FS

30 PSI ±0.5% FS

100 PSI ±0.5% FS

Linearity: best fit straight line

5 PSI ±0.25% FS

30 PSI ±0.1% FS

100 PSI ±0.1% FS

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ACR Electronics SmartReader Plus Manuel d'utilisateur Page 35