500 Volts Ac 50hz Frequency Premeasure Electronic Instruments

Our Precimeasure electronic instruments are known for their quality in providing accuracy, and repeatability for a longer period. All the electronic instruments are electrically isolated from the input power supply and hence safe to use in computerized data acquisition systems or recorders.
this scheme consists of
1] pt-100 sensor
2] current converter unit [ccu]
3] remote indicator with a 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 the 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 the temperature
accuracy of the instrument: A 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.