TESTO 0636.9835, 0636.9836 Application Information
Pressure Dew Point Probe
0636.9835 / 0636.9836
Application Information en
99 Washington Street
Melrose, MA 02176
Phone 781-665-1400
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com
Contents
Probe description.......................................................................3
User instructions ........................................................................4
Safety instructions......................................................................5
Operating instructions................................................................6
The pressure dew point probe ................................................6
Measuring ...................................................................................7
Maintenance ...............................................................................8
Control and calibration options .................................................9
Technical data ...........................................................................12
Warranty................................................................................12
Ordering data.............................................................................13
Appendix A ................................................................................14
Necessary pressure dew point values t
pd
................................14
Appendix B ................................................................................15
Dew point graph for compressed air......................................15
Measuring instrument conforms with EN 50 081-1 + EN 50 082-1
Probe description
3
PTFE sintered cap
Humidity sensor
Temperature sensor
Standard plug-in nipple
Humidity/temperature
probe
Internal thread
Measuring chamber
Protective sleeve
valve
User instructions
The two pressure dew point probes guarantee quick
and accurate dew point measurement.
The probe was developed in cooperation with a world
market leader in the compressed air engineering
sector.
The standard probe 0636.9835 is sufficient for most
measurements in compressed-air piping (e.g.
refrigeration dryers in the range from 0 to 2 °C t
pd
).
The precision probe 0636.9836 is the ideal probe for
highly accurate measurements in the remaining
humidity range (e.g. in adsorption dryers to
-50 °C t
pd
).
The pressure dew point tpdis the temperature at which
compressed air reaches the saturation state (100%
RH). This value is an important criteria for the perfect
running of the compressed air plant.
The probe is connected to the compressed air system
via a standard plug-in connector (G1/4” internal thread
to ISO 228-1) or via a screw-on adapter for
measurements at test points. If required other
standard plug-in connectors with thread G 1/4” can be
screwed into measuring chamber.
The sensor is positioned in the flow of compressed air
being measured, for the duration of the measurement.
The probes can be used, without a measuring
chamber, in accordance with the Instruction Manual
for the testo x35 instruments.
By connecting the probe to testo x35 the user has a
portable, mains independent measuring system. The
large display enables the
display of the relative humidity or the dew point with
the temperature.
4
Safety instructions
Read
before using the instrument
Please read the Instruction Manual belonging to the measuring instrument.
Do not exceed the permissible pressure range.
Observe the measuring range of the sensor.
Overheating can destroy the probe.
Observe the permissible storage and transport temperature
as well as the permissible operating temperature
(e.g. protect the measuring instrument from direct sunlight).
If the instrument is opened, improperly handled of if force is applied,
the warranty will no longer be valid.
5
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