Pressure Transmitter- Series 638
Stainless Steel, Intrinsically Safe, Accuracy ±0.50%, 4 - 20 mA Signal
Series 638 Pressure Transmitters employ a polysilicon sensor for superior long-term stability and repeatability with +/- 0.5% accuracy. They are FM approved intrinsically safe. Stainless steel NEMA 4X enclosure is ideal for corrosive media in hazardous environments. Output is 4 - 20 mA with 10 - 30 VDC power supply. NIST traceability with calibration certification are standard.
| Service : | Liquid, Gas or Vapor. |
|---|---|
| Output : | 4 - 20 mA DC, max. 30 mA DC (2 wire). |
| Power Supply : | 10 to 30 VDC. |
| Loop Resistance : | Vmin = 10V + (.022A x RL). |
| Zero and Span Adjust : | +/- 2.8% each. |
| Temperature Limits : | Operating : -20°F to 180°F (-29°C to 82°C), Compensated : -20°F to 160°F (-29°C to 71°C), Storage : -65°F to 250°F (65°C to 121°C). |
| Accuracy : | +/- 0.50% F.S. |
| Response Time : | Less than 1 ms. |
| Stability : | Less than 1% F.S./yr. |
| Hysteresis : | +/- 0.15% F.S. |
| Thermal Effects : | Zero : 0.028% F.S./°F, Span : 0.029% F.S./°F |
| Wetted Parts : | 17-4 PH stainless steel |
| Process Connection : | ¼" NPT(M) |
| Cable : | 36 inches (92 cm), 24 AWG |
| Body : | 300 Stainless steel. |
| Weight : | 2 oz. (56 grams) approximate without cable. |
| Model Number | Operating Range, PSI | Operating Range, Bar |
|---|---|---|
| 638-10-FM 638-11-FM 638-12-FM 638-13-FM 638-14-FM 638-9-FM |
0-750 0-1000 0-2000 0-3000 0-5000 0-7500 |
0-50 0-69 0-138 0-207 0-345 0-517 |
SUGGESTED SPECIFICATIONS :- Pressure Transmitter shall have an accuracy of ±0.08% FS BSL with non-interacting adjustable zero and span potentiometers. Transmitter shall have RFI, EMI, reverse polarity, and over voltage protection. Unit shall be UL approved intrinsically safe for Class I, II & III, Division 1 & 2, Groups C, D, E, F & G. Pressure transmitter shall be Dwyer Model No. 639____.