24
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When used with
testo 400/650
, the multi-function humidity probes from Testo (e.g.
0636.9740) show readings for relative humidity and the corresponding temperature after switch-
on. Once
is pressed one of the following parameters from a list can be added in the Main
menu under
INSTRUMENT
-
U
NITS
-
Humidity
:
- dew point temperature (td °C)
- absolute humidity (g/m
3
)
- absolute humidity (g/kg)
→
if dependent on pressure please set the absolute pressure under
SPECIAL
-
P
ARAMETER
for correct pressure compensation.
- enthalpie (J/g or kJ/kg)
→
this variable is also dependent on pressure
- psychrometric wet-bulb temperature (PSYC °C)
- water vapour partial pressure (mbar)
- water level (V ppm, displayed unit in display: ppm): describes volume levels of water vapour
in the complete sample gas.
→
Please adjust current pressure at
SPECIAL
-
P
ARAMETER
-
ABS
. P
RESS
.
- pressure dew point (tdat °C): to atmospheric dew point (1013mbar) of calculated dew point
under pressure.
→
Please adjust duct pressure at
SPECIAL
-
P
ARAMETER
-
ABS
. P
RESS
.
The instrument indicates
atmospheric dew point td °C.
Following activation via
an additional channel is generated in addition to %RH and ° C. This
can be deactivated via
INSTRUMENT
-
U
NITS
-
Humidity
-
Off
.
The humidity probes 0636.9740 and 0636.9715 as well as 0635.1540 can be calibrated using
the hand-held instrument (no buttons on probe). All other humidity probes are adjusted using
buttons.
Please also consult the 0973.1820 Instruction manual on the 0554.0660 control and
adjustment set.
Confirm in the main menu with
under
PROBES
-
C
ALIBRATION
. Place the humidity probe in
the respective calibration container and start the calibration at the points (11.3%RH / LiCl or
75.3%RH / NaCl) by pressing the appropriate function button.
The required value, the current reading and the remaining calibration time are shown on the
display. If the current reading is stable you can carry out the calibration ahead of time using the
middle function button. Repeat the calibration at the second calibration point.
Note!
PROBE - R
ESET
cannot reverse calibration.
Humidity measurement
Inserting calculated parameters
Calibration
Humidity measurement
Calibrating
testo hygrotest 650
with reference instrument
testo 650/400
:
Requirements:
-
testo 650
hand-held instrument or
testo 400
, V1.22 or newer
- Transmitter board from Version V 1.18 (visible on the largest
IC component)
- Calibration connection cable (0699 3556 / 10)
- Connection cable for probes (0430.0143 or 0430.0145)
- Reference humidity temperature probe (0636 9741)
Connect transmitter to probe socket 1 and a reference probe to
probe socket 2 in the instrument. The humidity and temperature
value is adjusted to the reference probe via the menu item
“Probe” - ”Probe adjustment”.
Humidity adjustment is deleted via ”Probe reset”. Temperature
adjustment is retained.
Adaptation time: min. 30 minutes, at constant temperature.
V 1.18
Micromatch
plug-in connection
Calibrating
testo 608-H2
with reference instrument
testo 650/400
:
Requirements:
-
testo 650
or
testo 400
, V2.0 or newer
- Calibration connection cable (0699 4235 / 10)
- Connection cable for probes (0430.0143 or 0430.0145)
- Reference humidity temperature probe (0636 9741)
Remove battery from
testo 608-H2
battery compartment but do
not disconnect.
Attach calibration cable to micromatch plug-in connection.
Insert correctly.
Connect calibration cable to probe socket 1 of the
testo 650/400
.
Connect reference humidity temperature probe to the right probe
socket of
testo 650/400
.
The humidity value is adjusted to the reference probe via the
“Probe” - ”Probe adjustment” menu item.
Humidity adjustment is deleted via ”Probe reset”.
Adaptation time: min. 30 minutes, at constant temperature.
