Introduction To Dm70 - Vaisala DRYCAP DM70 Kurzanleitung

1 Introduction to DM70
Vaisala DRYCAPâ Handheld Dew Point Meter DM70 measures dew point temperature
accurately in measurement range −60 °C ... +60 °C (−76 ... +140 °F), depending on the probe
model. DM70 consists of 2 main units: the MI70 indicator and DMP74 probe, models A, B, or C.
DM70 can be used with an optional sampling cell to measure process dew point. It can also be
used as a tool for reading the output of fixed Vaisala dew point transmitters, such as DMT242,
DMT132, DMT143, DMT152, and DMT340.
DM70 measures the following parameters:
Table 1 Display parameters
Parameter
Relative humidity
Temperature
Dew point/frost point
1)
temperature
Dew point temperature
Dew point in the atmospheric
pressure
Dew point/frost point in the
atmospheric pressure
Absolute humidity
Mixing ratio
Water concentration /
Water mass fraction
1) T shows dew point temperature above the freezing point (0 °C/32 °F) and frost point
d/f
temperature T
f
industry standard.
2) T shows dew point over water throughout the entire measurement range.
d
This Quick Guide introduces the features of the MI70 indicator and the basic measurement
procedure with the DM70 meter.
For the full DM70 operating instructions, specifications, and more information on sampling
cells, download DM70 User Guide (M010091EN) from www.vaisala.com/dm70.
6
Abbreviation
RH
T
T
d/f
T
2)
d
T
d
T
d/f
a
x
H O
2
(dew point over ice) below the freezing point. This is considered as the
Metric unit
%RH
°C
°C
°C
°C atm
°C atm
3
g/m
g/kg
ppm / ppm
v w
M212551EN-B
Non-metric unit
%RH
°F
°F
°F
°F atm
°F atm
3
gr/ft
gr/lb
ppm / ppm
v w