page 11 of 17
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check
carefully the validity of this document with respect to his product. manual-no.: 999039 / 16/12/2009
Cleaning the gauge head
The gauge itself is maintenance-free.
➨
➨
➨
➨
➨
Only VSP 5
: Using small screw driver or pencil tip, release locking ring in gauge head connection and
remove protective filter with shim, keep locking ring.
➨
➨
➨
➨
➨
Fill the gauge head chamber with a solvent (e. g. benzene) and allow sufficient cleaning time. Observe
all regulations concerning usage and disposal of solvents!
➨
➨
➨
➨
➨
Drain the solvent and dispose of in accordance with regulations, repeat cleaning if necessary.
➨
➨
➨
➨
➨
Rinse the gauge head chamber several times with alcohol in order to remove all solvent residues.
➨
➨
➨
➨
➨
Allow the pressure transducer to dry.
➨
➨
➨
➨
➨
Only VSP 5:
Assemble protective filter and locking ring, replace protective filter if necessary.
➨
➨
➨
➨
➨
Readjust gauge head if necessary.
Note:
The gauge head
VSP 5
can be used without protective filter, if only the protective filter is not compatible
with the pumped media (see “Technical data“).
If the vacuum system is contaminated (oil, particles etc.):
☞
Replace the protective filter (cat. no.: 63 87 29) in the gauge head VSP 5 if necessary.
➨
➨
➨
➨
➨
Using small screw driver or pencil tip, release locking ring in gauge head connection and remove
protective filter with shim, keep locking ring.
Readjustment
Readjusting the gauge head VSP 5
Readjustment at atmospheric pressure can be performed easily. Readjustment “vacuum“ at a pressure
< 5 x 10
-4
mbar should only be performed, if that vacuum range can be reached with a vacuum pump
available. Readjustment under vacuum is only necessary when, due to aging or contamination of the
filament, incorrect readings are observed. Clean a contaminated gauge head prior to readjustment.
Adjustment at atmospheric pressure:
➨
➨
➨
➨
➨
Vent vacuum system or gauge head, make sure, that gauge head is exposed to atmospheric pressure.
➨
➨
➨
➨
➨
Push key-button at the side of the housing with a pencil tip or a small screw driver. Status indication
adjustment (”Set”) is displayed.
➨
➨
➨
➨
➨
Push key-button again in order to adjust pressure reading to atmospheric pressure. Status indication
adjustment vanishes.
Instructions for repair with directions for repair and spare parts list is available on
request.
☞
The instructions are for trained service people.
