Cygnus 1 User Manual

Installing the Gauge
PROBE/KNURLED RING ASSEMBLY
Use of the Membrane
¾ The polyurethane membrane covering the Probe-face provides better contact on rough
surfaces and protects the Probe-face from damage.
¾ If making measurements manually : to avoid excessive wear of the membrane, do not
use pressure nor ‘screw’ the Probe when trying to obtain readings on rough surfaces -
a light touch is normally sufficient
¾ Check the membrane regularly and renew when it becomes worn.
Replacing the Membrane in the Knurled-ring
Ö To replace the membrane unscrew the Knurled-ring from the end of the Probe.
The membrane is held in place by a locking-ring.
Ö Unscrew the locking-ring using the locking-ring key provided
Ö Remove the old membrane and clean the locating groove in the knurled ring before
fitting a new membrane
Ö Replace the locking-ring and screw up tight, checking that the membrane is properly
located.
Refitting the membrane
U There must always be a thin film of mineral oil such as glycerine or liquid paraffin
between the membrane and the Probe-face to ensure good contact and exclude any
air.
U Do not overtighten the knurled ring assembly as this will affect the performance of
the Probe.
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Cygnus 1 Specifications

General

Brand	Cygnus
Model	1
Category	Measuring Instruments
Language	English