Differential Pressure Transmitter
PascalDat 20 Differential Pressure Transmitter. Measurement range: +/- 20 Pa.
PascalDat 100 Differential Pressure Transmitter. Measurement range: +/-100 Pa.
The PascalDat is a high precision instrument for measuring and controlling pressure differences in the
low range, for example in cleanroom systems.
The measurement method is based on the principle of mass flow measurement.
This method requires no moving parts (e.g. diaphragm)
and so enables very high accuracy, reproducibility, reliability and long-term stability.
The instrument is very small and designed for cleanroom compatibility.
Differential Pressure Transmitter
| Model | Description |
|---|---|
| PascalDat 20 | Differential Pressure Transmitter. Range: 0 - 20 Pa |
| PascalDat 100 | Differential Pressure Transmitter. Range: 0 - 100 Pa |
The gauge is available in two versions.
PascalDat 20 is for applications in a measurement range of -20 to +20 Pa (-0.08 to +0.08inH2O) and
PascalDat 100 in a range of -100 to +100 Pa (-0.4 to +0.4 inH2O).
A digital interface (RS 232) and an analog output (0 ... 10 V, 2 ... 10 V, 0 ... 20 mA or 4 ... 20 mA) indicate the pressure difference.
The analog output can be configured and calibrated, so that the measurement range can be adjusted
to match the signal range (e.g. 5...10 Pa = 4...20 mA) as well as to a following connected device.
in the measurement cell.
Very low accuracy error < ±0.25% FS (full scale)
or < ±1.5%m.V.(measured value) whichever is larger.
Very low offset drift <0.1Pa/year.
No hysteresis.
Insensitive to vibrations.
Not damaged by high differential pressures
up to 2 bar.
Clean room compatible designed
Analog output signal can be configured and
calibrated.
Ease of calibration (Zero and Gain) Clean room
compatible designed
Customer specific configuration is possible.
Quick and simple programming with
PascalTool-Palm or Palm Emulator on PC.
Easy compensation of hose length by configuration
software
| Type | PascalDat 20 | PascalDat 100 |
| Measurement range | -20 ... +20 Pa | -100 ... +100 Pa |
| Max. resolution | 0.016 Pa | 0.07 Pa |
| Measurement interval | 150 ms ... 1350 ms | 150 ms ... 1350 ms |
| Time constant | 10 ms | 10 ms |
|
Measurement accuracy (at 20°C/50%RH) (m.V. = of measured value) |
< 4 Pa = ± 0.05 Pa >/= 4 Pa = ± 1,5% m.V. |
< 17 Pa = ± 0.25 Pa >/= 17 Pa = ± 1.5% m.V. |
| Temperature effect | < 0.05% m.V./°C | < 0.05% m.V./°C |
| Atmospheric pressure effect (at 1013.25 hPa) | 0.1% m.V./hPa | 0.1% m.V./hPa |
| Hysteresis | 0.00% | 0.00% |
| Offset drift (at constant Temp. 20°C) | < 0.1 Pa/year | < 0.1 Pa/year |
| Max. permissible differential pressure | ± 2 bar | ± 2 bar |
| Max. permissible overpressure | 2 bar | 2 bar |
| Max. mass flow through the sensor | 120 sccm (0.12 liter/min) | 370 sccm (0.37 liter/min) |
| Operating temperature range | 0 ... 50°C | 0 ... 50°C |
| Analog output (configurable and calibratable) | 0 ... 10 V, 2
... 10 V (load to ground >10 kOhm) 0 ... 20 mA, 4 ... 20 mA (load <500 Ohm) |
|
| Digital interface | RS 232 (ASCII-string or complex protocol) | |
| Power supply | 10 ... 35 VDC | 10 ... 35 VDC |
| Power consumption | max. 3 W | max. 3 W |
| Protection | IP 54 / EMC | IP 54 / EMC |