PX838 Series bidirectional operation using bipolar power supply (±12 Vdc) with bidirectional output (0±5 Vdc or 0±2.5 Vdc)
Connect the power supply to + for positive,
- for negative, and 0 for neutral; connect the output
Specification
Pressure range: | 4 inH2O to ±150 psid |
Pressure media: |
|
X750 diaphragm | Any fluids, compatible with stainless steel (316L), |
to signal for positive and 0 for negative signal.
Purging or
0 SIGNAL
X750 Inconel, 600 Inconel and viton. |
Beryllium copper diaphragm Any fluids, compatible with stainless steel (316L), beryllium copper, brass and soft solder and viton.
Accuracy: | ±0.25% FS BSL |
(including linearity, hysteresis and repeatability) |
|
Two 5 mm hexagonal socket bleed screws are located on the outer casing and can be loosened to bleed the two pressure connections. Make sure that these screws are tightened after this operation.
Note: It is possible to changeover the bleed screws and pressure connections enabling easier access or for installation in a difficult position.
Adjustments
The following equipment is required to carry out the adjustments:
rPower supply
rVoltmeter or
r
rPressure standard
uConnect the sensor as shown in Installation. The sensor should be put in its normal operating position (vertical or horizontal). Remove the cover to gain access to the zero and span adjustment potentiometers.
Zero adjustment
uZero adjustment is carried out with no pressure applied.
uDepending on the model, set the zero adjustment to: 0.00 V, 2.50 V, 4.00 mA or 12.00 mA
Span adjustment
uSpan adjustment is carried out with the required span pressure applied to the + pressure connector.
uDepending on the model, set the span adjustment to: 5.00 V, 10.00 V or 20.00 mA.
uRelease the pressure.
Completion
Check the output at zero pressure and if necessary, repeat the zero and span adjustments.
rRelease the pressure and disconnect the equipment.
rRefit the cover.
Long term stability: | ±0.3% over 1 year at stabilized temperature |
Weight (approximate) | 3.3 lbs |
Dimensions | see below |
Power......................................................................................................................................supply | 10 to 30V d.c. |
| |
PX838 (0 to 10V output) | 16 to 30V d.c. |
PX838 (0 to ±5V output) | ±12V d.c. |
Pressure Ports: | High |
|
|
|
|
Low | 0.68 |
| Mounting: |
| |
0.26 | G1/8 Female via |
| |||
| 2xM5 holes x 0.472 | DP | |||
|
| welded adapter | |||
|
| on 2.66 | centers |
| |
|
|
|
| ||
3.11 | Pg7 Cable |
|
|
| |
|
|
|
| ||
| Gland |
|
| Purge Ports: |
|
|
|
|
| High Pressure | |
|
|
|
| Low Pressure | |
| 2.80 |
|
|
|
|
|
| Dimensions |
|
|
|
