USER'S GUIDE____________________________________________________________________
18 __________________________________________________________________ M210704EN-F
Table 3
Optional Quantities and Their Abbreviations
Quantity Abbreviation Metric
Unit
Non-Metric
Unit
Relative humidity RH
RH
%RH
%RH
Temperature T
T
ºC
ºF
Dewpoint/frost point in the
atmospheric pressure (T
d/f
)
TDFA
ºC atm
ºF atm
Absolute humidity (a)
A
g/m
3
gr/ft
3
Absolute humidity in standard
pressure and temperature (NTP)
ANTP g/m
3
gr/ft
3
Wet bulb temperature (T
w
) TW
ºC
ºF
Water vapor pressure (P
w
) PW
hPa lb/in
2
Water vapor saturation pressure
(P
ws
)
PWS hPa lb/in
2
Enthalpy (h)
H
kJ/kg
Btu/lb
Difference of T and T
d/f
(
∆
T) DT
ºC
ºF
Dewpoint temperature (T
d
)* TD
ºC
ºF
Dewpoint in the atmospheric
pressure (T
d
)*
TDA
ºC atm
ºF atm
*
Use these parameters only if you need dewpoint over water below 0 ºC/32ºF and not
over ice (industry standard)
Basic Features and Options
- Dewpoint measurement with AutoCal and sensor purge features
- Sensor warming in high humidities
- Two analog outputs and a serial interface
- Several probes for different applications
- User friendly multilingual display option
- Calculated output quantities available
- Different probe mounting kits, sensor protection options and probe
cable lengts 2 m, 5 m or 10 m
- Support for MODBUS serial communications protocol
- USB connectivity for service connections via the optional
USB-RJ45 cable
- Optional
modules:
- Galvanic isolation for outputs
- AC mains power supply
- RS-422/485-module
- LAN and WLAN interfaces
- Data logger module with real time clock
- Additional analog output module
- Alarm relay module
