PortaSens
III
Portable Gas Leak Detector, Model D16
Operation and Maintenance Manual
Rev-A Feb 2018
- 55 -
Power
NiMH Battery
The NiMH (nickel metal-hydride) battery shipped with the unit will
provide 10-12 hours of continuous operation when fully charged. When
depleted, as indicated on the Main Display, it should be removed and charged
in an external charger.
If the supplied NiMH battery is not available, an alkaline battery may be
used. A high quality alkaline battery is likely to provide 6 or more hours of
operation.
Two features are available to help extend battery life, “Display Sleep”,
and “Auto-shutdown”. The “Display Sleep” (mode) allows you to turn off the
display and continue to monitor gas levels and log data. The display is
restored when a gas or trouble alarm is detected, or when the “Wakeup”
switch is pressed. The “Display Sleep” mode is selected from the “Display
Menu” (see Sleep Mode on page 20). The “Auto-shutdown” feature
automatically turns off the D16 when the display has not been touched for a
prescribed period of time. This feature is disabled by default, but may be
enabled through the configuration settings. See Auto-shutdown on page 47
to enable this feature.
USB Power
The D16 is powered from the USB connection during data transfers, and
is even capable of normal operation. Power may be supplied from a USB host,
or a USB charger with at least a 200mA rating. Connecting USB power
restarts the D16, even during normal operation. The battery is effectively
disconnected when operating from USB power, and may be removed. Exiting
USB mode switches the D16 into normal operation. The USB logo replaces the
battery indicator on the “Main Display”, and if the battery is removed, “NO
BATTERY” appears in the upper right corner.
Shutdown
Touching the “Off” button on the “Main Display” or “Trouble Display”
page shuts down the D16, as does holding down the “Wakeup” switch for one
second. The D16 will shut down automatically if the sensor is removed for 5
minutes, or if the battery voltage drops below 1 volt.
When shut down, the D16 display is turned off and the CPU is stopped.
However, power is still applied to the sensor to maintain cell bias. Holding
down the “Wakeup” switch for one second restores normal operation, as
does installing a battery, or connecting a USB charger. Connecting to a USB
host causes the D16 to enter USB mode, which may be exited for normal
operation.
