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| Add Time： | 2016-08-21 16:47:42 |
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Characteristic
This exquisite appearance structure, strong encapsulation, good service performance.
This unified standard for signal transmission, can be equipped with either a digital meter, pressure pick range extension.
This module built-in CPU, 24 bit A/D, temperature sensor, pressure sensor to finish continuous correction, linear, zero temperature drift, ensure accurate and reliable output signal.
Long term stability. The module (Shi Piao), the host is amended, to ensure the accuracy of the instrument for a long time.
Module selection method
* first, the customer should be clearly identified, the maximum pressure range Pmax, check the pressure gauge in the minimum pressure range Pmin, the detected meter accuracy test, delta pressure module accuracy Delta module;
* according to the standard table accuracy is tested 1/4 scale accuracy values to calculate the relationship, to choose the pressure module range covers the detected meter range ratio n; n= Delta (delta × / test module; 4);
This module follows pressure range selection:
The first module pressure range P1 required Pmax, namely, P1=Pmax. The first pressure module P1 can cover the range of the check table is P1/n;
Second pressure module range P2, should be less than P1/n of the next check table range; second pressure module P2 can cover the range of the check table is P2/n;
Third pressure module range P3, should be less than P2/n of the next check table range; third pressure module P3 can cover the range of the check table is P3/n;
Fourth pressure module range P4, should be less than P3/n of the next check table range; fourth pressure module P4 can cover the range of the check table is P4/n;
… … … …
Until the coverage of the minimum range Pmin.
For example:
There is a power plant, the plant has the following range of pressure transmitter -100kPa, 5kPa, 10kPa, 25kPa, 60kPa, 100kPa, 160kPa, 1MPa, 2MPa, 6MPa, 10MPa, 25MPa, 30MPa, 60MPa, the highest accuracy is 0.5% meters. First of all, we design the accuracy of the 1/4 with the accuracy of the meter, and then consider it from the highest range. We choose the following pressure module:
The first step in the calculation of the first, 2, =0.5% were known: Delta, delta module =0.05%, so that the pressure module range covers the detected meter range ratio n; n= Delta (delta / test module × =0.5%/; 4) (0.05%× 4) =2.5;
The second step according to the above calculation method of the third, the pressure module range is as follows:
The first module pressure range P1 60MPa required pressure module, namely, P1=60MPa. The first pressure module P1 can cover the range of the check table is P1/n=60MPa/2.5=24MPa;
Second pressure module range P2, should be less than 24MPa (P1/n=60MPa/2.5=24MPa) of the next check table range, that is, P2=10MPa; second pressure module P2 can cover the scope of the check table is P2/n=10MPa/2.5=4MPa;
Third pressure module range P3, should be less than 4MPa (P2/n=10MPa/2.5=4MPa) of the next check table range, that is, P3=2MPa; third pressure module P3 can cover the scope of the check table is P3/n=2MPa/2.5=0.8MPa;
The fourth module pressure range P4, should choose less than 0.8MPa (P3/n=2MPa/2.5=0.8MPa) of a detected meter range, i.e., P3=160kPa; range fourth P4 pressure module to cover the seized table is P4/n=160kPa/2.5=64kPa;
Fifth pressure module range P5, should be less than 64kPa (P4/n=160kPa/2.5=64kPa) of the next check table range, that is, P5=60kPa; fifth pressure module P5 can cover the scope of the check table is P5/n=60kPa/2.5=24kPa;
Sixth pressure module range P6, should be less than 24kPa (P5/n=60kPa/2.5=24kPa) of the next check table range, that is, P6=10kPa; Sixth pressure module P6 can cover the scope of the check table is P6/n=10kPa/2.5=2.4kPa;
Seventh pressure module range P7, the final choice of -100kPa, P7=-100kPa.
Refer to the above module selection method from high to low to choose the appropriate module, and then according to the needs and habits, supporting the CPC2000 series pressure calibrator.
