Description
The ME series of Gefran, are pressure transmitters for using in High temperature environment.
The main characteristic of this series is the capability to read temperature of the media up to 400°C.
The constructive principle is based on the hydraulic tra- smission of the pressure.
The fluid-filled system assures the temperature stability. The phisical measure is transformed in a electrical mea- sure by means the strain-gauge technology.
TECHNICAL DATA OF ME
| Accuracy (1) | H <±0.25%FSO (100…2000 bar) M <±0.5%FSO (35…2000 bar) |
| Resolution | Infinite |
| Measurement range | 0..35 to 0..2000bar 0..500 to 0..30000psi |
| Maximum overpressure (without degrading performances) | 2 x FS 1.5 x FS above 1000bar/15000psi |
| Measurement principle | Extensimetric |
| Power supply | 10…30Vdc |
| Maximum current absorption | 32mA |
| Insulation resistance (at 50Vdc) | >1000 MOhm |
| Output signal Full Scale (FSO) | 20mA |
| Zero balance (tollerance ± 0.25% FSO) | 4mA |
| Zero signals adjustment (tollerance ± 0.25% FSO) | “Autozero” function |
| Span adjustment within ± 5% FSO | See Manual |
| Maximum allowed load | See diagram |
| Response time (10…90% FSO) | ~ 1ms |
| Output noise (RMS 10-400Hz) | < 0.025% FSO |
| Calibration signal | 80% FSO |
| Output short circuit ingress and reverse polarity protection | YES |
| Compensed temperature range | 0…+85°C |
| Operating temperature range | -30…+105°C |
| Storage temperature range | -40…+125°C |
| Thermal drift in compesated range: Zero / Calibration / Sensibility | < 0.02% FSO/°C |
| Diaphragm maximum temperature | 400°C / 750°F |
| Zero drift due to change in process temperature (zero) | < 0.02 bar/°C |
| Zero drift temperature for Autocompensated version (SP) within the temperature range 20°C-400°C inclusive the drift temperature of the housing | < 0.003 bar/°C 100 ≤ p < 500 bar 0.0014 %FS/°C p ≥ 500 bar |
| Standard material in contact with process medium | Diaphragm: • 15-5 PH with GTP+ coating • 17-7 PH corrugated diaphragm with GTP+ coating for ranges <100 bar (1500psi) Stem: • 17-4 PH |
| Thermocouple (model ME2) | STD: type “J” (isolated junction) |
| Protection degree (with 6-pole female connector) | IP65 |
FSO = Full scale output : (1) BFSL method (Best Fit Straight Line): includes combined effects of Non-Linearity, Hysteresis and Repeatability.
