Feature: VT-NB and VT-NR comprehends a family of head mount and DIN rail mount 4-20mA temperature transmitters for the most common temperature applications. One single model can be configured to accept several thermocouple types and Pt100 RTDs. Manual zero (offset) adjustment can be done by means of a wire jumper simulating a keyboard for the VT-NB or with 2 front keys in the VT-NR. Sensor failure protection: programmable burnout upscale or downscale. Cold junction compensation for thermocouples
Configuration: Configuration is achieved by means of an RS232 cable connected to a PC with the convenient software.
Specification:
Programmable input:
thermocouples type J, K, T, E, N, R, S, Pt100 RTD
and 0-50mV with programmable working range.
2-wire loop powered 4-20 mA output.
Linearized 4 to 20 mA or 20 to 4 mA output for t/c and Pt100.
Optional 0 to 10 Vdc for VT-NR only.
Digital filter can be set for best 50 or 60 Hz performance.
Power supply:
18 to 32 Vdc.
Maximum load (RL) :
RL(max.)=(Vdc-12)/0.02?O? where: Vdc= Power supply voltage
Accuracy:
Pt100 and 0 to 50 mV ± 0.2% full scale.
Thermocouples ± 0.3% max. of full scale
Temperature effect:
0.003% SPAN/°C.
Working temperature:
-40 to +85°C (-40 to 185°F).
Humidity:
0-90% RH
Resolution:
0.004mA(12 bits)
Response Time :
<100ms
Electromagnetic compatibility:
EN50081-2, EN50082-2
No isolation between the sensor and the 4-20 mA loop.
Internal protection against polarity inversion.
Housing:
ABS plastic
Input Types and Ranges :
User can easily program input type and temperature range as below:
INPUT
RANGE
MIN SPAN
Thermocouple K
0 to 1370°C / 32 to 2500°F
100°C
Thermocouple J
0 to 760°C / 32 to 1400°F
100°C
Thermocouple R
0 to 1760°C / 32 to 3200°F
400°C
Thermocouple S
0 to 1760°C / 32 to 3200°F
400°C
Thermocouple T
0 to 400°C / 32 to 752°F
100°C
Thermocouple N
0 to 1300°C / 32 to 2372°F
100°C
ThermocoupleE
0 to 720°C / 32 to 1328°F
100°C
Pt100
-200 to 650°C / -328 to 1202°F
40°C
Voltage
0 to 50mV
5mV
Configuration :
Configuration is achieved by means of an RS232 cable connected to a PC with the convenient software.
VT-NB and VT-NR comprehends a family of head mount and DIN rail mount 4-20mA temperature transmitters for the most common temperature applications. 
User can easily program input type and temperature range as below:
