29
In order for the hand pump to be operated, it is vital that its connections with the refe-
rence gauge and the test item are pressure-resistant.
Furthermore, for the best measurement procedure possible, sufficient and correct
purging of the measurement device is required. Only then can you reduce the pres-
sure fluctuation (
➝
paragraph 3.1) to a minimum.
CAUTION!
Material damage!
The test sample, the adapter and the seal must be free from impurities to prevent
damage to the hand pump or hydraulic lines.
Maximum torque of the pressure connections:
Reference: 15 Nm
Test item: 15 Nm
Carry out the following steps* for the purging air from the hydraulic lines of the hand
pump. For this, note also the warnings in section paragraph 5.1 “Generating pressure”.
â
Fill the storage container to approximately two-thirds capacity with the required
hydraulic fluid.
â
Open the pressure relief valve by turning counter clockwise.
â
Turn the reference manometer with matching seal in the hand pump’s connection
(G1/4).
IMPORTANT! Do not tighten the reference yet!
â
Carefully pump until the hydraulic liquid escapes at the connection and the piston
system has been ventilated.
â
Only then should you tighten the reference.
â
Pump 5…10 times to prime the hydraulic lines.
â
Turn the pressure relief valve counter clockwise until it is firmly closedt.
â
Connect the pressure hose to the hand pump’s Minimess
®
connection, and
tighten the connection.
â
Tightly screw the Minimess
®
adapter on the pressure hose.
â
Select the suitable adapters and seals for the test item’s connection.
â
Screw the adapter for the test sample onto the Minimess
®
adapter.
â
Turn the test sample with seal in the adapter.
IMPORTANT! Do not yet tighten the test item!
â
Now pump until the hydraulic liquid escapes at the test sample’s connection. The
pressure hose and the test sample connection are now ventilated.
4 Purging hydraulic lines
Содержание HTP1
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