- 4-20 mA Output
- Low Cost, 100 Ohm Pt, alpha = 0.00385
- RTD or Potentiometer
- Thermo-Head Installation
- Non-Isolated
- 0.1% Accuracy
- Class 3-C RFI Immunity
- Factory Calibrated
- Low 8.5 VDC Drop
Conversion of RTD signals is accomplished using SM812EC series signal transmitters. Surface mount technology provides a slim profile allowing the series to mount directly within mininature thermal connection heads. The series accommodates Pt 100 Ohm RTDs and provides a 4-20 mA output current proportional to the detected temperature.
SM812EC series is available in -40 to 120F and 0 to 200F precalibrated temperature ranges. The span and zero potentiometers provide span and zero adjustments of +/- 25% of the normal range.
| To Order the models below scroll to the top of the page and choose the desired model from the "Temperature Range" drop down menu, then ADD TO CART |
| PART NUMBER | DESCRIPTION |
| TX-DE-SM812EC-0011 | RTD Transmitter Temp Range -40 to 120F |
| TX-DE-SM812EC-0012 | RTD Transmitter Temp Range 0 to 200F |
SPECIFICATIONS
ACCURACY
+/- 0.1% span, includes effects of linearity, hysterisis, and repeatability referred to temperature input
NONLINEARITY
0.1% relative to a 100 Ohm Pt RTD, alpha = 0.00385 standard curve for nominal range. 4:1 minimum improvement on nonlinearity otherwise
THERMAL EFFECT
1) Zero Shift of +/- 0.02% /Span/F
2) Span Shift of +/- 0.02% /Span/F
CIRCUITRY: epoxy encapsulated, analog circuitry w/sealed potentiometers
POWER SUPPLY: working voltage of 8.5-35 VDC, supply voltage effect <+/- 0.001% /Span/Volt
LOOP CONSIDERATIONS
1) loop resistance load effect <+/-0.002% Span/300 Ohms
2) maximum loop resistance (V supply -8.5V)/20 mA
RFI IMMUNITY: rated class 3-C: 0.25% of span per SAMA PMC 33.1-1987-2abc
FREQUENCY RESPONSE: output -3dB @ 3db @ 3Hz input
TEMPERATURE RANGE: ambient -13 to 185F, storage -85 to 257F
HUMIDITY: 0 to 95% noncondensing
INPUT: 100 Ohms Pt RTD, alpha = 0.00385
OUTPUT
1) signal range: 4 to 20 mADC
2) absolute limit: 2 to 29 mA
3) open RTD indication: output > 22mA
CALIBRATION RANGE ADJUSTABILITY:
1) zero 25% of normal span
2) Span 25% of normal span