Alnor HM680, Owner'S Manual, Page: 19 / 40

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Chapter 4. Main Menu
The Main Menu is accessed by pressing the ENTER key from either the Pressure or Flow Measurement
screens.
Figure 5: Main Menu
Zero Gauge Pressure
This Main Menu option allows for zeroing the manometer’s gauge pressure sensor.
Select Cv/Kv Factor
This Main Menu option allows for selecting any of the 100 user-programmed valve flow coefficients (
Cv
or Kv ) stored within the instrument. The most recent selected Cv (Kv) factor will be the default when
entering the Flow Measurement screen.
Select Fluid
This Main Menu option allows for setting the fluid type ( Water or Other ) of the system being measured.
Defining the fluid type is necessary in order for the manometer to account for the fluid’s specific gravity
when calculating flow.
Water
In selecting Water , the instrument will automatically determine the specific gravity based upon the
measured temperature of the fluid ( Tprobe ).
Note:
If the accessory temperature probe is not connected, the user will have the option of manually
entering the fluid temperature (
T-entered
).
Other
In selecting Other , the manometer will prompt the user to enter the fluid’s specific gravity.
Note:
When
Other
is selected as the fluid type, the entered value for specific gravity will not be
compensated with changes in temperature.