SMART-280防爆智能溫度變送器

SMART-280
INPUT	:	T/C RTD POTENTIOMETER
DISPLAY	:	LCD
OUTPUT	:	4-20mA + HART
MOUNTING	:	2" PIPE MOUNTING
SENSOR	:	REMOTE OR INTEGRAL

PERFORMANCE
Input types :
thermocoules J,K,R,S,T,E
RTD type Pt100, Ni100
Potentiometer min. 65 max 1000 Ohm
Input Reference Current: 1.5 mA Max.
Outputs: 4~20mA( 2-Wire )
Output Limits : 3.4 ~ 30mA typical
Power supply : 12.6V ~ 36V DC ( Loop-powered)
Accuracy :± 0.2% of full scale
Isolation: none
Operating temperature : -25 ~ +85℃
Operating temperature affect
Less then ± 0.1% of output span per ℃
Wide Range Adjustment
Zero : 20% of span
Span : 20% of span
Load Resistance
4 to 20mA : Road(max) = 600ohm
1 to 5 V : Road(min) = 150kohm
Case Mat'l : ABS
Mounting : 2" Pipe Mounting or Direct Mounting
Display : LCD
■ FUNCTION
The SMART-280 converters RTD and T/C sensor input
to proportional process current output signals.
The output and power supply the same pair of wires.
These loop-powered transmitters deliver high
performance at a low cost.
Rugged construction makes them suitable for
mounting in the field.
■ FEATURES AND BENEFITS
Excellent accuracy and stability :
ensure reliable measurements in harsh industrial
environments
Wide range and span adjustment:
enable precise calibration.
RTD and T/C signal linearization
Improves accuracy and reduces drift
Sensor compensation
The sensor generates a signal corresponding to the
actual temperature and is complete with a PTC thermistor
which also electronic system (coldjunction).
General
Specifications M o d el SMART-280
Explosion-Proof Temperature Transmitter
GT-221
12 - 99
REF SENSOR TYPE NOMINAL RANGE
MINIMUM
SPAN
0 Pt100 Resistance -200.0 / +600.0 50
1 Ni100 Resistance -50.0 / +160.0 15
2 Potentiometer 0.0 / 1000.0 Ohm 65 Ohm
3 T/C E Thermocopuple -190.0 / +800.0 65
4 T/C J Thermocopuple -180.0 / +1050.0 80
5 T/C K Thermocopuple -200.0 / +1320.0 95
6 T/C R Thermocopuple 0.0 / +1680.0 105
7 T/C S Thermocopuple 0.0 / +1660.0 105
8 T/C T Thermocopuple -240.0 / +380.0 40