PCE Instruments PCE-P18, User Manual, Page: 39 / 44

6. teChniCAl dAtA
Basic parameters:
- range of relative humidity
measurement (RH) 0...100%, without condensation
1)
- basic error of humidity
conversioni ± 2% of the range for RH = 10...90%
± 3% for the remaining range
- hysteresis of the humidity
measurement ± 1% RH
- basic range of temperature
measurement (T) -20...60°C
2)
- basic error of temperature
conversion ± 0.5% of the range*
* for the versions with analog outputs P18(D)-1, P18(D)-2, P18(D)-4 or P18(D)-5,
a basic error of temperature conversion may increase by 0.2°C
- calculated values absolute humidity (a) [g/m
3
]
dew-point temperature (Td) [
o
C]
- additional errors:
- temperature influence ± 25% of the basic error /10°C
rs-485 digital output:
- transmission protocol MODBUS
- baud rate 4800, 9600,19200,38400,
57600 bit/s
- mode RTU: 8N2, 8E1, 8O1, 8N1
- max. response time 300 ms
Analog outputs:
- current 4...20 mA
- voltage 0...10 V
- max. load resistance
of the current output 100
W
- min. load resistance
of the voltage output 1 k
W