This non-isolated 2-wire in-head mount transmitter is specifically designed for RTD and thermocouple temperature applications, and has a 4-20mA current output. USB programming is hassle free – it takes just 2 minutes using our purpose-built software, and no calibration or power supply is required.
This is the market's first USB powered programmable DIN-mount transmitter from Define Instruments. Your own technicians can program these easily and effortlessly on site or at your workshops. |  |
Define Instruments's TM-2HL universal transmitter features:
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Define Instruments’s TM transmitters convert the sensor input signal to a current or voltage output, where it can then be displayed or controlled by a variety of industry standard compatible devices. They accept a wide range of standard input types without the use of jumpers and are available in DIN-rail mount or head-mount casing. A reusable USB communications kit can be added to enable PC interface, using purpose-built, windows compatible software. | |
| Common Specifications | |
| Configuration | 2-wire 420mA (loop powered) |
| Power supply | 9.5-36V DC |
| 9.5-36V DCSupply voltage sensitivity | < ±0.005%/V FSO |
| < ±0.005%/V FSOOutput load resistance | 700Ω at 24V DC (50Ω/V above 9.5V DC) |
| Maximum output current | Limited to <28mA (Emission mission & immunity) |
| EMC compliance | Emissions (EN 61326). Immunity (EN EN61326). Safety (EN 61010-1). |
| Accurate to | <±0.03% FSO typical |
| Ambient drift | <±0.003%/°C FSO typical |
| Noise immunity | 125dB CMRR average (2.0kV DC limit) |
| R.F. immunity | <1% eff ect FSO typical |
| Response time | 400msec typical (10–90% 300msec typical) |
| Operating temperature | –20–+65°C |
| Storage temperature | –20–+100°C |
| –20–+100°COperating humidity | 5–85%RH max (non-condensing) |
| Casing | Head mount - 44 x 44 x 23mm (H x W x D) |
| Thermocouple Input Specifications | |
| Thermocouple types | B, E, J, K, N, R, S, T |
| B, E, J, K, N, R, S, TUSB programmable zero | 0–±99% of the span |
| Input impedance | 1MΩ min |
| Thermocouple lead resistance | 100Ω max |
| Cold junction comp. | –20–+90°C |
| Accuracy | E, J, K, N, T: < ±2°C. B, R, S: < ±3°C. |
| Temperature drift | E, J, K, N, T: < ±0.05°C. B, R, S: < ±0.2°C. |
| Sensor break output drive | Function high upscale/low downscale |
| CJC error | < ±1°C |
| RTD Input Specifications | |
| RTD input | Pt100 or Pt1000 DIN 3-wire type (2-wire can be used with off set calibration) |
| Sensor current | 0.15mA nominal |
| 0.15mA nominalLead wire resistance | Pt100: 10Ω/wire max. Pt1000: 5Ω/wire max. 0.02% FSO off set error per Ω of lead resistance. |
| Accuracy | ≤ 0.3°C |
| USB programmable zero | 0–±99% of the span |
| USB programmable span | –200–+850°C |
| Sensor break output drive | Function high upscale/low downscale |
| Linearity (Pt100) | 0.02% FSO for span inputs ≤200°C. 0.1% FSO for span inputs ≤850°C |
| Linearity (Pt1000) | 0.02% FSO for span inputs ≤200°C. 0.2% FSO for span inputs ≤520°C |
