Application and construction
The PCE-28 pressure transmitter is applicable to the measurement of the pressure, underpressure and absolute pressure of gases, vapours and liquids. The active sensing element is a piezoresistant silicon sensor separated from the medium by a diaphragm and by specially selected type of manometric liquid. The electronics is placed in a casing with a degree of protection from IP 65 to IP 68, depending on the type of electrical connection applied.
Technical data
Any range from 0...25 mbar up to 0...1000 bar
Hysteresis, repeatability 0,05%
Response time < 120 ms
version TR: < 30 ms
Thermal compensation range -10...80°C
Operating temperature range (ambient temp.) -40...80°C
Medium temperature range -40...130°C over 130°C – measurement with use an impulse line or diaphragm seals
Output signal 4...20 mA, two wire transmission ( or 0..10V)
Material of wetted parts 316Lss, Hastelloy C 276, Au
Material of casing 304ss, 316Lss
Power supply
Output 4..20mA
10…36 V DC – special version 8…36 V DC (Ex 9...28 V DC)
version TR, version Safety: 10,5…36 V DC (Ex 12...28 V DC)
ALW and ALM version: (11…36V DC)
output 0..10V
13…30 VDC
Error due to supply voltage changes 0,005%/ V
Calibration
Potentiometers can be used to shift the zero position and the range by up to ±10%, without altering the settings (not possible with ALM and SG casing).
Installation
The transmitter is not heavy, so it can be installed directly on the installation. When the pressure of steam or other hot media is measured, a siphon or impulse line should be used. The needle valve placed upstream the transmitter simplifies installation process and enables the zero point adjustment or the transmitter replacement.
When the special process connections are required for the measurement of levels and pressures (e.g. at food and chemical industries), the transmitter is provided with an Aplisens diaphragm seal. Installing accessories and a full scope of diaphragm seals are described in detail in the further part of the catalogue.
Measurements under explosion hazard
ATEX Intrinsic safety version is available for taking measurements in zones under explosion hazard. The installation of the transmitter in a zone under explosion hazard requires the use of a Ex power supply. We recommend the use of the Aplisens ZS-30/1Ex power supply and separator.
