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| [Transmitters/Controllers] HART® Smart Isolated 2-Wire Transmitter |
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| 글쓴이 : 다일IBC
날짜 : 09-03-21 22:57
조회 : 14311
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Conax Model: HST
The Conax Model HST HART® Smart Isolated 2-Wire Transmitter features universal input capability in 3 variations to accept most of today’s process parameters: Thermocouples, RTDs, DcmV, Potentiometers, Resistance Sensors, DcmA, DCV, AC Amps, Frequency and Pulse. Model HST is fully software driven and all input parameters are programmable. An external hand-held programmer, an integral transmitter mounted programmer, or HART protocol hand-held enables on site calibration, and indication of process parameters. Other features of the Model HST include high precision linearization for thermocouple and RTD sensor inputs, inverse output capability, variable input signal damping, sensor breakdown indication, full display scaling capability, auto-zero input, and more. Heavy duty metal case construction and carefully designed input and output circuitry ensures a high degree of protection from adverse environmental conditions to maximize RFI/EMI immunity. Optional features include LCD display with integral programmer, hand-held programmer, and explosion-proof: enclosure:
- CL I, GRPS B, C, D
- CL II, GRPS E, F, & G
- CL III Type 4X
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General Specifications
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| Inputs |
TC - Types E, J, K, T, R, S, N, B, C.
RTD - 2, 3, and 4-wire Pt-100, (DIN & NIST curves) Pt-200,
Ni-100, Cu-10 and other RTDs.
DC mV ±120.00mV input SPAN.
Potentiometers - 100Ω to 20KΩ
Resistance - 2, 3, and 4-wire 0 to 600Ω
Optional: DCmA, DCV.
Optional: AC-Volts, AC-Amps, Frequency/Pulse. |
| Minimum Range |
None. Limited only by signal quality. |
| Digital Resolution |
>17 bits |
| Outputs |
4-20mA isolated analog current loop, or Digital communication, HART® protocol. |
| Supply |
12-45 VDC (@ no load). Reverse polarity protected. |
| Display (optional) |
8x1 Character LCD indicator for programming and display of input and output parameters and status. |
| Operating Conditions |
-20ºC to +70ºC. 0-95% RH, non-condensing |
| Storage Temperature |
-55ºC to +125ºC |
| Turn-On Time |
Within 4 seconds to rated response |
| Response Time |
0.5 seconds to 99% of reading (2 updates per second). |
| Damping Factor |
Programmable 0.0 to 32.0 seconds |
| Long Term Stability |
Better than ±0.1% of SPAN for 6 months |
| Isolation |
800 VDC or peak AC |
| RFI/EMI Immunity |
Tested per SAMA PMC 33.1C from 20 to 1000 MHz and for field strength up to 30 V/m. |
| C.M.R.R. |
>120db DC to 60 Hz |
| Enclosure |
Extruded, anodized aluminum |
| Dimensions |
3.00" x 2.44" x 2.46"
3.00" x 2.44" x 3.00" (with programmer/display)
(Hockey-puck housing. Suitable for mounting inside
3.5" diameter explosion-proof enclosures. |
| Performance Specifications |
| Analog Output Resolution |
0.025% of SPAN (±4µA) |
| Analog Output (D/A) Linearity |
±0.025% of SPAN |
| Digital Sensor Linearization |
<±0.02ºC for Pt-100 RTD
<±0.1ºC for thermocouples |
| Cold Junction Compensation |
Automatically corrected to within <±0.3ºC for all T/C types |
| Temperature Stability |
Zero: <±0.003%/ºC of SPAN
Span: <±0.005%/ºC of SPAN |
| Supply Voltage Effect: |
<±0.001% per volt |
| Calibration |
Automatic. Unit includes all of the calibration parameters. It performs periodic “ZERO”, “SPAN”, self-test, and auto calibration. No field calibration is required. | |
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