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> Fieldpiece ARH4 digital psychometer accessory head
Fieldpiece ARH4 digital psychometer accessory head
Fieldpiece ARH4 Digital Psychometer Accessory Head
The ARH4 accessory head enables most digital multimeters to measure humidity and temperature of air. In addition, the ARH4 contains the lookup tables to calculate wet bulb and dew point temperatures. Use wet bulb for getting target superheat from manufacturer charts.
Works with Fieldpiece "stick" meter, DL3 data logger, EHDL1 electronic handle, and digital multimeters with mVDC ranges
No lookup charts needed for wet bulb or dew point
Analog electronics (sensing function) separated from digital electronics (DMM function) for better overall dependability
Works like all other Fieldpiece accessory heads
Operating environment: 32-120 Deg F, under 95%RH
Output: 1mV/RH%, 1mV/Deg F, or 1mV/Deg C, depending on function selected
Temperature sensor: Thermistor temperature sensor
Temperature range: -4 - 140 Deg F
Temperature resolution: 0.1 Deg F
Temperature accuracy @ 73 Deg F +/- 10 Deg F, under 95%RH: 32-113 Deg F = +/- 1 Deg F, -4 - 32 Deg F = +/-2 Deg F, 113-140 Deg F = +/-2 Deg F
Relative humidity sensor: Capacitive humidity sensor
RH accuracy @ 73 Deg F +/- 10 Deg F, under 95%RH: +/-2.5%RH@77 Deg F, 10-90%RH, +/-5%RH@77 Deg F, less than 10%RH, more than 90%RH
Sensor response time (for 90% of total range): 60 seconds typical
Sensor hysteresis (excursion of 10-90-10%RH): +/-1%RH
Units of measure: %RH, Deg F, Deg C
Auto-off to save battery life
