Michell Instruments WM281, Руководство пользователя

Страница: 21 / 42

WM281/291 User’s Manual
14 97463 Issue 1, July 2014
appendix a
Appendix A Technical Specifications
Performance Specifications
Measurement Range (RH) 0 to 100% RH
Measurement Range (T) -30 to +70°C (-22 to +158°F)
Accuracy at 23°C (73°F)
Humidity
<±2% RH (5–95% RH)
Accuracy at 23°C (73°F)
Temperature
±0.4°C (±0.72°F)
Stability – RH Sensor <±1% RH/year
Response Time – RH Sensor <10 sec typical (for 90% of the step change)
Electrical Output/Input Specifications
Output Signal
0–1, 0–5, 0–10 V
0–20 mA, 4–20 mA, RS485
Supply Voltage 15 - 27 V AC and 18 - 38 V DC
Load Resistance Current output: R ≤ 500 Ω
Power Consumption 1.7 W maximum
CE Conformity 2004/108/EC
Operating Specifications
Operating Temperature
Probe
Housing
Storage
-30 to +85°C (-22 to +185°F)
-20 to +70°C (-4 to +158°F)
-30 to +70°C (-22 to +158°F)
Mechanical Specifications
Ingress Protection IP65 (NEMA 4 level)
Material
Housing
Probe
Aluminum die casting
Delrin
Dimensions
Housing
Probe
120 x 120 x 49.5mm (4.72 x 4.72 x 1.94”)
L=100mm ø19mm (L=3.93” ø0.74”)
Weight 450g (15.87oz)
Electrical Connections Screw terminals via Pg11 metal glands
Display Resolution LCD, 2 lines x 16 characters
20
0 55 70 80 85 -28
40
78
50
80
100
RH%
Temp °C
Operating conditions