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Verfügbare Sprachen
Verfügbare Sprachen
• PTR02250 * and PTR02251 *
The gauge housing is grounded via the measurement
cable at the control unit.
R1: Measurement wire
R2: Temp. compensator
R1
R2
NTC
1
2
3
4
8
Measurement Cable
Measurement cables for standard types are available in
different lengths (→ Pfeiffer Vacuum Catalog).
Operation
After connection the gauge is ready for operation.
NOTE
Measurement cables influence the accuracy of measure-
ment. If cables with lengths over 20 m are used, we strong-
ly recommend adjusting the gauge together with the cable.
For details refer to the operating manual of the correspond-
ing controller.
Alignment
The Pirani gauge is factory calibrated. For most applications,
it needs to be realigned. This allows to correct measurement
errors caused by spread between units, temperature and the
influence of the cable length. The gauge is aligned according
to the operating manual of the measurement unit used.
Gas Type Dependence
The measurement value is gas dependent. The reading ap-
plies to dry air, N
, O
, and CO. For other gases, it has to be
2
2
converted. In the pressure range below 1 mbar, this can be
done by entering the corresponding calibration factor on the
Pfeiffer Vacuum controller.
Maintenance
Realignment at the measurement unit can become necessary
in the following events:
• Aging
• Contamination
• After cleaning
Periodic replacement of the filter B41612003G is advisable if
contaminated gases are measured (→ Disassembly).
Cleaning
DANGER
Before starting work, inform yourself about any possible
contamination of the vacuum units and their components.
Make sure to adhere to the relevant regulations and safety
measures for contaminated products.
When using cleaning agents make sure to adhere to the
applicable handling and disposal regulations and safety
measures.
Procedure
1. Disassemble the gauge (→ Disassembly)
2. Clean or replace the filter
3. Fill the measurement chamber with a solvent (e.g. ben-
zene) and allow it to work for some time. Repeat this pro-
cedure is necessary.
4. Pour the solvent out
5. Rinse the vacuum chamber and the filter with alcohol for
several times in order to remove all solvent residues
6. Dry at ≈70°C
7. Insert the filter
8. Install the gauge (→Installation)
Troubleshooting
Fault
Pressure
readings sup-
plied by gauge
too high
8
1
7
2
6
3
No useful
4
indication
Disassembly
Before starting work, inform yourself about any possible
contamination of the vacuum units and their components.
Make sure to adhere to the relevant regulations and safety
measures for contaminated products.
Make sure to adhere to the special regulations concerning
cleanliness and damage prevention when working with va-
cuum components.
Procedure
1. Turn the gauge off.
2. Disconnect the cable.
3. Remove the gauge from the vacuum system.
Only for cleaning and replacing the filter:
4. Remove the filter
Returning the Product
When returning a contaminated product for maintenance:
• seal all openings of the product hermetically
• put the product in an appropriate, tight, solid packing
• enclose a completed declaration of contamination
Spare Parts
When ordering spare parts, always mention:
• all information on the nameplate
• description and ordering number
Description
Filter
Disposal
For professional disposal of the product, please contact your
nearest Pfeiffer Vacuum service office.
Possible cause
Remedy
Gauge contaminated
Minor deviations
can be compen-
sated by realign-
ment at the meas-
urement unit.
Clean the gauge
Filter contaminated
Clean or replace it
Filament broken
(an unbroken filament
has a resistance of
Replace the Pirani
100 Ω)
gauge
Gauge cable defec-
tive, interrupted, or
Repair or replace
short-circuited
the cable
DANGER
NOTE
Filter B41612003G
Part number
B41612003G
Berliner Strasse 43
D–35614 Asslar
Deutschland
Tel +49 (0) 6441 802-0
Fax +49 (0) 6441 802-202
info@pfeiffer-vacuum.de
www.pfeiffer-vacuum.de
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