Precimeasure electronic instruments are known for their quality in providing accuracy, repeatability for longer period. All the electronic instruments are electrically isolated from input power supply and hence safe to use in computerized data acquisition system or recorder.
This scheme consists of
1] pt-100 sensor
2] current converter unit [ccu]
3] remote indicator with power supply unit
4] thermometer pocket [optional]
Specifications:
Pt-100 sensor assembly:
Element resistance as per : din iec 751: 1985 [din 43760 super seeded]
Tolerance : class `b`
H.V. Test : all terminals to body, 500 v ac, 50hz for 1 minute.
I.R. Test : 100 meg. Ohms when checked by 500 v dc megger.
Current converter unit:
Power supply from indicator to ccu : 30v dc [maximum]
Ccu signal input : pt-100 rtd, simplex 3 wire
Ccu signal output : 4-20ma dc corresponding to temperature
Accuracy of the instrument : ± 1% of f.S.D
Thermal replica heater coil resistance: 0.22 ohms.
Ct secondary current temperature rise: 5a [maximum]
Degree of protection of enclosure : ip55 of iec 529, is: 12063
High voltage test : signal lines to body, 500v ac 50 hz. For 1 minute.
Power lines to body, 2 kv ac 50 hz. For 1 minute.
Insulation resistance test : 20 meg. Ohms when checked by 500v dc megger.
Remote indicator:
Display type : 3 ½ digits, 7 segment led display.
Auxiliary supply : 90 - 260 v ac/dc
Signal output : 4-20ma dc corresponding to temperature rise
Burden on signal output : 600 ohms maximum, including loop resistance
Temperature indicator range : 0 - 150°c [other ranges on request]
Resolution : 0.1 °c
Accuracy of the system : ± 1% of full scale range.
Protective class : ip 40.
Warm up time after switching `on` : 15 minutes [minimum]
H.V. Test : signal terminals to body, 500 v ac 50 hz. For 1 minute.
Power terminals to body, 2 kv ac 50 hz for 1 minute.
I.R. Test : 20 meg. Ohms when checked by 500 v dc megger.
Ordering information:
System : rtd scheme for rwti or roti
Model no. : 2201
Temperature range : 0 - 150°c [other ranges on request]
Gradient : ct secondary current & temperature rise to be specified [in case of rwti]
