FEATURES
Input for E, J, K, N, S, R, B e T thermocouple type
Two wire 4÷20 mA voltage linear output
Zero and span programmable by DIP SWITCH
Good accuracy and performance stability
Programmable for both°C & °F scales
One model covers both K & J TC type.
Conform to EMC standards - CE mark
Suitable for mounting on DIN B connection heads
Low profile
Low cost
APPLICATIONS
Temperature monitoring and controlling in:
- Process controls
- Automation systems
- Energy sources management
GENERAL INFORMATION
The two wire DAT1112 transmitter has been designed to give an output current signal of 4÷20 mA; this signal is perfectly linear and
proportional to the voltage generated by the thermocouple sensor connected to its input. The output current signal is supplied on the
same two wires used to power the device.
The user can program the full scale easily and quickly by means of four way DIP switch. The "zero" value can be varied between
-50°C to +50°C or -100 to +100 °F and the span value can be programmed following TC limits only.Moreover the same model is suitable
for K and J thermocouple, so as another model is suitable for R and S thermocouple. The maximum accuracy and reliability are ensured
for all the functions (conditioning, cold junction compensation and current transmission) thanks to the employement of high precision
and high-quality components and to the use of the SMD technology. The device, conform to the 89/336/EEC directives on
electromagnetic compatibility, is housed in a rugged self-extinguishing plastic case suitable for direct mounting on the connection head.
TECHNICAL SPECIFICATIONS (Typical @ 25°C and in the nominal conditions)
Input
Type of sensor
TC type K, J, S, N, E, T, B and R according to SIPT68
Zero
Programmable in the -50°C to +50°C range or -100°F to 100°F range.
Span
Programmable according to the "version table".
Influence of line resistance
0,2 µV /
Output
Sensor interruption signaling
Positive out of scale (< 3.5 mA on request)
Measuring current
4÷20 mA, two wires
Current limitation
about 35 mA
Protection against polarity reversal
60 V reverse max
Response time ( 10 to 90% of full scale)
0.3 s.
Warm-up time
3 minutes
Performances
Calibration inaccuracy
± 0.1% of f.s. or ± 0.2°C
Linearity error (inclusive of hysteresis and supply
± 0.1% of full scale
voltage variations)
Electromagnetic Compatibility (EMC)
According to EN50081-2 and EN50082-2
Thermal drift
0.02% of full scale/°C ( for span >= 300 °C / 500 °F )
Power supply voltage
12 ÷ 32 V
Operating temperature
- 20 ÷ 70 °C
Storage temperature
- 40 ÷ 100 °C
Relative humidity (non-condensing)
0 ÷ 90 %
Weight
25 grams
DAT 1112
Programmable range transmitter
for thermocouple
