21
WIKA operating instruction, model CPP120-X
EN
08/2020 EN/DE
6. Commissioning, operation
The connection for the pressure or vacuum supply line is situated at the rear of the
comparison test pump.
■
The inlet manifold
8
has only one connection for the vacuum and pressure supply.
■
It can connected either a pressure supply or a vacuum supply.
■
The inlet manifold
8
is tapped G ¼ thread, with a spotface machined in it for sealing
purposes.
■
Use a suitable seal (Item no. 38 in sealing and maintenance set).
Optionaly, an inlet manifold
8
adapter is supplied which when fitted with the
above suitable seal will give an alternative input connection of ¼ NPT.
6.4.3 Post-assembly test
CAUTION!
Damage to the hand test pump due to contamination
Contaminants of any kind (oil, grease, water ...) that adhere to the test item
will find their way into the pump and damage it.
▶
Ensure that the mating faces are absolutely clean.
▶
Clean the connections if necessary.
▶
Clean the test item and reference instrument before mounting.
1. Carry out a test calibration of a known pressure gauge (see chapter 6.5 "Procedure
(positive pressure and vacuum operation)") to ensure that the unit is working correctly.
⇒
Select a pressure gauge which covers the maximum working pressure of the
CPP120-X.
2. Apply maximum working pressure of 120 bar [1,740 psi] to system.
⇒
Close the outlet valve
4
by turning clockwise.
⇒
Open the inlet valve
3
carefully by turning anti-clockwise.
3. Release pressure and remove test gauges.
⇒
Close the inlet valve
3
by turning clockwise.
⇒
Open the outlet valve
4
carefully by turning anti-clockwise.
4. The comparison test pump CPP120-X is now ready to use.
6.5 Procedure (positive pressure and vacuum operation)
1. Fit instrument to be tested to a test connection
1
.
⇒
Use a suitable adapter if needed (see chapter 11 "Accessories").
2. Connect the reference measuring instrument to the other test connection
1
.
⇒
Use a suitable adapter if needed (see chapter 11 "Accessories").
