input

sensor type

302A/B1: Pt100,Pt1000,Cu50,Cu100

302A/B2: S,R,B,K,N,E,J,T,WRe3-25

302A/B3: Pt100,Pt1000,Cu50,Cu100，S,R,B,K,N,E,J,T,WRe3-25

Accept user specifications

Connection method

302A/B1: A two, three, or four wire heating resistance sensor

302A/B2: One thermocouple sensor and one thermistor sensor (three wire) are used for cold junction compensation, or a fixed cold junction temperature can be set for compensation without the thermistor sensor. Alternatively, the built-in thermistor sensor of the transmitter can be used for cold junction compensation (compensation accuracy and final measurement accuracy)

302A/B3: Adopt 302A/B1 or 302A/B2 connection method according to requirements

measuring range

See Appendix 1: List of Input Sensor Types and Accuracy

response time

≤ 250ms with sensor for short circuit and open circuit monitoring

output

Two wire system 4-20mA

Load resistance Ra

Ra ≤ (Us-14.7V)/0.024A, Us is the loop voltage

sensor fault

Short circuit: Accept user specified (3.5～3.75mA)

Open circuit: Accept user specified (21)～23mA)

system failure

Can be set to 3.2mA or 24mA

measurement accuracy

Accuracy (digital measurement accuracy)

See Appendix 1: List of Input Sensor Types and Accuracy

Analog output accuracy

0.025% full scale

Long-term Drift

The first year is less than 0.2% of full scale

Temperature influence

See Appendix 2: Effects of Environmental Temperature

Power supply impact

<0.001% full scale/V

Influence of load impedance

<0.025% full scale/100 Ω

rated operation conditions

ambient temperature

-40～85℃ -20～60 ℃ (explosion-proof type)

condensation

allow

electromagnetic compatibility