Alnor HM680, Руководство пользователя, Страница: 31 / 40

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Chapter 7. Maintenance and Troubleshooting
The HM680 Hydronic Manometer has been designed to provide long-term field use with minimum
required maintenance. As with any precision electronic device, proper care, maintenance, and handling
will ensure its accurate and reliable operation.
Routine Maintenance
The following guidelines should be followed whenever storing the HM680 Hydronic Manometer:
Draining the Hoses
Fluid within the High (red) and Low (blue) pressure hoses should be properly drained whenever the
instrument is being stored after use.
1.
Disconnect the manometer hoses from the test points ( Reference Chapter 3 ).
2.
Disconnect the High (red) and Low (blue) pressure hoses from the manometer.
3.
Turn the shut-off ball valve on both the High and Low pressure hoses to the open position.
4.
Using a suitable high pressure air source, blow the entrained liquid from both hoses.
Draining the Manometer Valve
Fluid within the manometer valve should be properly drained whenever the instrument is being stored
after use.
1.
Disconnect the High (red) and Low (blue) pressure hoses from the manometer.
2.
Turn the valve handle on the manometer to the BYPASS position.
3.
Hold the manometer with the pressure ports directed downward to allow liquid to drain from the unit.
4.
Turn the valve handle on the manometer to the MEASURE position.
5.
Hold the manometer with the pressure ports directed downward to allow liquid to drain from the unit.
Note:
The HM680 Hydronic Manometer should be stored with the valve handle in the
MEASURE
position.
Cleaning the In-line Hose Filters
Figure 14: Inline Filter Assembly
Shut-Off Valve
Filter Screen
Silicon Rubber O-Ring
Short Hose Section