- Fully Isolated
- 0.1% Accuracy
- Thermocouple Input Type J/K/T/E/R/S
- Dip Switch Calibration
- Thermo-Head Installation
- Field Rangeable Via Dip Switch (No Soldering)
SM815 isolated two wire TC transmitter receives signals from thermocouples and provides a proportional 4 to 20 mA output signal which is completely isolated from the input. Because the SM815 is a two wire device, a single pair of twisted copper wires are all that is required to provide power to the unit as well as to carry the output current.
The SM815 is field calibratable, accepting inputs from type J, K, E, R, S & T thermocouples, with millivolt spans ranging from 4 to 64 millivolts. Thermocouple types and ranges are selected using a 6 position DIP switch and final calibration is accomplished by means of multiturn zero and span potentiometers. The zero pot provides an offset adjustment of ± 25% of the span. The SM815 is provided with upscale thermocouple break indication.
| To Order the model below scroll to the top of the page then click on ADD TO CART button |
| PART NUMBER | DESCRIPTION |
| TX-DE-SM815 | 2 Wire T/C Transmitter, Selectable Ranges, ISOLATED |
| Downloads |
SPECIFICATIONS
POWER REQUIREMENT: 8.5 to 35 VDC at terminal block
ACCURACY: 0.1 % of millivolt span
WORKING TEMPERATURE: - 25 ºC To 85 ºC
STORAGE TEMPERATURE: - 65 ºC To 125 ºC
THERMAL ZERO SHIFT: 0.01 % /ºC ( span > 10 mV ) 0.02 %/ºC ( span < 10 mV )
ISOLATION: 500 VRMS
COMMON MODE REJECTION: 115 dB at 60 Hz
3 dB FRQUENCY: 3 Hz
WEIGHT: 2.5 oz.
INPUT
Sensor Input: Thermocouples J, K, T, E, R & S
Input Break Indication: upscale
Input Offset Adjustment: ± 25 % of mV span
Input Source Current: 4 nA typical
Input Resistance: > 73 X 107 Ohms
OUTPUT
Output Range: 4 to 20 milliamps
Output Limits: 3 to 28 mA, Typical
Max. Load Resistance: = (supply voltage - 8.5V) / 20 mA
Load Effect: <.01% of Span / 300 Ω Change
Power Supply Effect: <.002% of Span per Volt