Alnor HM680, Руководство пользователя, Страница: 18 / 40

12 HM680 Hydronic Manometer
2.
Allow the manometer to stand undisturbed until the reading is complete (time of completion is
dependent on the time constant setting).
Note:
Discrete measurements stored from the Pressure Measurement screen will not contain flow data.
Disconnecting the Manometer from the Test Points
Caution should be exercised when disconnecting the HM680 Hydronic Manometer from a pressurized
system, as water or air discharged under pressure poses the potential risk of serious personal injury. The
following provides a guideline for disconnecting the manometer from the test points once measurements
have been completed.
1.
Turn the shut-off ball valve on both the High and Low pressure hoses to the closed position.
2.
Disconnect the High pressure (red) hose from the higher line pressure test point.
3.
Disconnect the Low pressure (blue) hose from the lower line pressure test point.
Note:
If additional measurements at another location/system containing the same fluid are to be
made, it is not necessary to proceed to step 4 and drain the fluid entrained within the hoses at
this time. The fluid remaining within the hoses will help minimize the time necessary to bleed
entrained air prior to making subsequent measurements.
4.
Place the open end of the Low pressure (blue) hose in a suitable receptacle or near a drain.
5.
Turn the valve handle on the manometer to the
BYPASS
position.
6.
Turn the shut-off ball valve on the Low pressure (blue) hose to the open position to discharge the
pressurized fluid out of the open end of the Low pressure (blue) hose.
7.
Elevate the High pressure (red) hose and turn its shut-off ball valve to the open position to allow for
draining of the remaining entrained fluid.