STT700 Honeywell Temperature Transmitter

STT700 Honeywell Temperature Transmitter

The STT700 Honeywell Temperature Transmitter is available in a variety of models for measuring thermocoupl es, RTD and millivolts and ohm sensor types.

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Features

  • SmartLine platform features including SmartLine Connection Advantage when used with Experian
  • Single input supporting up to 4-wire RTD sensor connection
  • Dual input option supporting up to two (2) 3-wire RTD sensor connections
  • Digital accuracy up to 0.15°C for RTD
  • Callendar-Van Dusen sensor constants input
  • HART7 communications
  • DE communications
  • Field housing, head mount, panel mount and DIN rail mounting options
  • Transmitter and sensor diagnostics
  • FM / CSA / ATEX / IEC Ex approvals
  • Full compliance with SIL 2 / 3 requirement
  • Up to a 4-year warranty

 

 

Applications

  • Detection, conversion and transmission of temperature in industrial automation control
  • In the field of environmental monitoring, the measurement and transmission of atmospheric temperature, water temperature, ground temperature and other parameters are realized
  • Used in weather stations, hydrological stations, geological exploration and other fields
  • In the field of medical equipment, it realizes the monitoring and transmission of patient body temperature.
  • Applied to the cold chain logistics industry to monitor and record the ambient temperature of logistics vehicles and cold storage

 

Specification

Parameter Description
Input Span Adjustment Range No limits to adjustments within the maximum range except minimum span limit of 1

engineering unit
Analog Output

Digital Communications:

 Two-wire, 4 to 20 mA HART 7 protocol compliant

Honeywell Digitally Enhanced (DE) protocol compliant
Output Failure Modes Honeywell Standard:                                          NAMUR NE 43 Compliance:

Normal Limits:             3.8 – 20.8 mA                          3.8 – 20.5 mA

Failure Mode:       ≤ 3.6 mA and ≥ 21.5 mA         ≤ 3.6 mA and ≥ 21.5 mA
Output Accuracy ±0.025 % span
Supply Voltage Effect 0.005 % span per volt.
Transmitter Turn on Time (includes power up & test

algorithms)

 HART or DE: 6 sec.
Analog Input Stability: 0.05% of URL per year for 10 years

Maximum Lead Wire Resistance: Thermocouples and millivolts: 25 ohms/leg RTD and ohms: 25 ohms/leg
Response Time

(delay + time constant)

 Analog Output

500 mSec to reach 96% of final value with 0 seconds damping
Update time 500 mSec for Single Input Units 1 Sec for Dual Input Units
Damping Time Constant HART: Adjustable from 0 to 102 seconds in 0.1 increments. Default: 0.50 seconds

DE: Discrete values 0.0, 0.3, 0.7, 1.5, 3.1, 6.3, 12.7, 25.5, 51.1, 102.3 seconds.

Default: 0.3 seconds
Ambient Temperature Effect Digital Accuracy

For all RTD (except Pt200) and 500 ohm Input Types: 0.017 ohms/°C For RTD Pt200 and 2000 ohm Input Types: 0.034 ohms/C.

Output D/A: 0.0045 % of span/°C
Cold Junction Accuracy ±0.5 °C
Total Reference Accuracy Digital Mode

Digital Accuracy + C/J Accuracy (T/C input types only)

Analog Mode (HART only)

Digital Accuracy + Output D/A Accuracy + C/J Accuracy (T/C input types only) Example: Transmitter in Analog Mode with Pt100 sensor and 0 to 200°C range Total Reference Accuracy = 0.15 °C + (200 °C / 100%) * 0.025% = 0.20 °C
Sensor Burnout Burnout detection is user selectable. Upscale or down scale with critical status.
Vibration Effect Per IEC60770-1 field or pipeline, high vibration level (10-2000Hz: 0.21 displacement/3g max acceleration)
Electromagnetic Compatibility IEC 61326-3-1
Isolation 2000 VDC (1400Vrms) Galvanic isolation between inputs and output.

 

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