Comark C9551 - Manual (Page 13)

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4 .5 Battery Replacement
Unscrew the two screws at the base of the instrument
and slide off the battery cover. Replace the battery with
a 9V PP3 type battery. Replace the battery cover taking
care not to over tighten the two screws.
4 .6 Use with Pressure Test Kit
The C9500 series instruments can be used together
with the optional TK2 pressure test kit as a low cost
calibration system for checking or calibrating other
pressure instruments.
To use TK2 as a calibrator, connect a calibrated C9500
series instrument, suitable for the maximum pressure
to be used, to one of the ports on the hand-pump.
Connect the instrument to be checked or calibrated to
the other port. Read the instructions supplied with the
TK2 kit for details of the pump operation. Ensure the
C9500 meter is zeroed with the pressure relief valve
open before measurements or adjustments are made.
Note: With the C9551 meter it is possible to over-
range the instrument with just one squeeze of the
pump handle. If this should occur unscrew the pressure
release valve slowly until the display again shows a
pressure reading then tighten. The volume adjustment
on the pump may now be used for fine control of the
applied pressure.
4.7 Silicone Version
Although C9500 instruments are generally used for gas/
air measurement, special versions are available with
silicone protection to allow liquid pressure measurement
without sensor corrosion.