Vaisala DM500 - Manual (Page 55)

Chapter 10 __________________________________________________________ Display Settings
VAISALA _______________________________________________________________________ 53
CHAPTER 10
DISPLAY SETTINGS
This chapter describes the display settings.
Display Backlight
The display backlight is automatically on when the device is turned
on. After 10 hours use, the backlight turns off. When pressing any
button, the light turns on again.
Selecting the Quantities and Units
The following quantities and units can be chosen to the display:
Parameter Unit
T
d/f
, T
d
ºC or ºF
2 P
w
(water vapor partial pressure) mbar
2 H
2
O (water content in ppm
v
) ppm
v
12 RH (relative humidity) %RH
12 T
w (
wet-bulb temperature) ºC or ºF
12 a (absolute humidity) g/m 3 , gr/ft 3
2 a
NTP
(absolute humidity in NTP conditions) g/m 3 , gr/ft 3
2 x (mixing ratio) g/kg, gr/lb
12 h (enthalpy) kJ/kg, Btu/lb
1 ºT (difference of T and T
d/f
) ºC or ºF
1 T (temperature) ºC or ºF
2 P (pressure) bar, hPa, psi, torr
3 Flow slpm, scfh
1 If sampling from process, parameter is relevant only if the optional
temperature sensor is used to measure real temperature of the process
gas (or if the actual T value is set manually).