Pressure Temperature Transmitter STT700 SmartLine Digital accuracy
up to 0.15 Deg C for Pt100 4-20 mA DC
Introduction
Part of the SmartLine® family of products, the SmartLine STT700 is
a high performance temperature transmitter offering high accuracy
and stability over a wide range of process and ambient
temperatures. SmartLine easily meets the most demanding needs for
temperature measurement applications.
Best in Class Features:
The STT700 is single or a dual input temperature transmitter that
supports millivolt, thermocouple and RTD sensors. It is available
with either HART or DE protocol output.
High performance
o Digital accuracy up to 0.15 Deg C for Pt100
o Stability up to ±0.05% of URL per year for ten years
o 500 mSec update time (single input)
o 1 Sec update time (dual input)
Reliable measurement
o Built in galvanic isolation
o Sensor break detection
o Comprehensive on-board diagnostic capabilities
o Full compliance to SIL 2/3 requirements.
o Available with 4 year warranty o Supports Namur 89 Wire break
o Direct entry of Callendar-van Dusen coefficients R0, α, δ and β
for calibrated RTD sensors.
Lower Cost of Ownership
o Universal input
o Dual sensor option
o External zero, span, & configuration capability
o Polarity insensitive loop wiring
Communications/Output Options:
o 4-20 mA DC
o HART ® (version 7.0)
o Honeywell Digitally Enhanced (DE)
All transmitters are available with the above listed output and
communications protocol option.
Mounting Options:
o Direct sensor head mounting in DIN Form A aluminum housing.
o Other mounting options available include wall, pipe, DIN Rail or
single compartment field housing.
Instructions:
Make selections from all Tables Key through XIII using column below
the proper arrow. Asterisk indicates availability. Letter (a) refer
to restrictions highlighted in the restrictions table. Tables
delimited w ith dashes.
Differential Temperature Measurement
SmartLine STT700 Temperature supports differential temperature
measurements for dual input transmitters. When the loop current
mode is set to "Differential" then the input range is from A to B
for sensor 1 & 2 where
A = Sensor 1 Minimum - Sensor 2 Maximum
B = Sensor 1 Maximum - Sensor 2 Minimum
Digital Accuracy for differential temperature measurement
If both input types are the same, then the digital accuracy
equals 1.5 times the worst case accuracy for that input type.
If the input types are different, then the digital accuracy
equals the sum of the worst case sensor 1 and sensor 2 accuracies.
For example, assume that input 1 is a J T/C and input 2 is an R
T/C. Assume that the desired operating range is between 0 and +400
°C. The digital accuracy for a J T/C in this range is 0.30 °C and
the digital accuracy for an R T/C in this range is 1.00 °C.
Therefore, the worst case digital accuracy would be 1.30 °C.
Performance under Rated Conditions – All models
| Stray Rejection | Common Mode AC (50 or 60 Hz): 120 dB (with maximum source impedance of 100
ohms) or ± 1 LSB (least significant bit) whichever is greater with
line voltage applied. DC: 120 dB (with maximum source impedance of 50 ohms) or a ±1 LSB
whichever is greater with 120 VDC applied. DC (to 1 KHz): 50 dB (with maximum source of impedance of 50 ohms)
or ±1 LSB whichever is greater with 50 VAC applied. Normal Mode AC (50 or 60 Hz): 60 dB (with 100% span peak-to-peak maximum) |
| EMC Compliance | EN 61326-1 and EN 61326-3-1 (SIL) |
| Lightning Protection Option | Leakage Current: 10 uA max @ 42.4 VDC 85 °C Impulse rating: 8/20 uS 5000 A (>10 strikes) 10000 A (1 strike min.) 10/1000 uS 200 A (> 300 strikes) |
Materials Specifications - All models
| Parameter | Description |
| Terminal Block and Module Housing | Lexan 500R (Polycarbonate, Glass Fiber Reinforced 10%) |
| Connection Screws | M3 Nickel Plated Brass |
| Weight | 0.075 kg (0.2 lbs) |
