Amphenol PROTIMETER HygroMaster-L BLD7750L, Instruction Manual, Page: 6 / 12

6 | INS7751 Rev. A
Note: The battery status is indicated by an icon on the
display. When the low battery message appears, replace
the battery.
To switch ON, Press the power button momentarily.
Note: The HygroMaster-L switches OFF automatically
after a set time (can be set till 6 min) if no activity is
observed. (see instruction for setting the Auto OFF time)
To switch the instrument OFF immediately, press and
hold for at least 3 seconds and release.
Whenever the battery voltage falls below the threshold value,
the battery symbol starts blinking. If the battery voltage falls
below the operating level, the instrument prompts with the
message “low battery - Switching off the device” and turns
OFF automatically.
There are three values displayed on the measurement
screen. First display value is the primary value which is the
relative humidity. Second display is Ambient temperature
and the third can be switched between dew point and mixing
ratio. Third measurement can be changed according to the
need of the customer using
or key.
The representations in the measurement mode is as in the
picture on the page 7.
5. “ HygroMaster-L” modes
The Protimeter HygroMaster-L primarily measures air
temperature and relative humidity.
5.1 Measurement mode:
The default mode while the device is turned ON is
measurement mode. The device will turn ON with the
measurement screen as below.