A. Pt100 platinum resistor is a thermo-resistor with better linearity in the range
of -30.0℃~240.0℃ and meets the requirements for Grade B set forth in
GB/T8622-97-- Technical Specification and Reference Table for Industrial
Platinum Resistance.
B. Overall dimension: Ф4mm×40mm
(2) Sensor
A. Electrical parameters
Operating temperature range：0.0℃~70.0℃
Operating humidity range：0.0%RH~100.0%RH (Condensable)
Detection range: 0.0%RH~99.9%RH
Storage temperature range：Below 95.0%RH (Condensable)
Detection accuracy: ±5%RH
(3) Humidity module (optional function)
07
A. Explanation of PTC
PTC is an abbreviation for positive temperature coefficient thermistor, which is
a semiconductor resistor having a typical temperature sensitivity. When the
temperature exceeds a certain value (Fixed temperature point not be adjust-
able), its resistance value will increase impulsively with increasing temperature,
i.e., resistance mutation.
B. Logical relation of interlock control of Pt100 and PTC
a. Interlock control of Pt100 and PTC on over-temp alarm
• When the temperature measured by Pt100 exceeds over-temp alarm
value, in addition, PTC reaches the point of over-temp alarm and the resis-
tance has mutated. Over-temp alarm signal will output.
b. Interlock control of Pt100 and PTC on over-temp trip
• When the temperature measured by Pt100 exceeds over-temp trip value,
in addition, PTC reaches the point of over-temp trip and the resistance has
mutated. Over-temp trip signal will output.
(4) Interlock control of Pt100 and PTC on over-temp alarm and over-temp trip
signal (optional function)
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