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A low battery is indicated by the battery symbol on the lower line of the LCD display;
illumination of this indicator shows that the battery should be replaced as soon as possible.
Generally the remaining battery life after low battery indication is several days however this is
not guaranteed. Replacement batteries are available from the instrument manufacturer or
they may be purchased independently by the user; for user replacement it is recommended
that a Tekcell SB-AA11 battery be used. Use of a battery which is not a 3.6V Lithium Thionyl
Chloride type will void the instrument warranty.
2.3.12 External DC Power
External DC power may be connected to the instrument in the range of 12-30V DC; this will
activate the LCD backlight, the sensor supply, and the isolated output. When external DC
power is provided the instrument will no longer draw any power from the battery – the
battery will then only be used as a backup power source. With the battery in backup mode the
life is expected to be approximately 8-10years.
2.3.13 Sensor Supply
The instrument is equipped with a regulated sensor supply (5V/20mA maximum) terminal
which is suitable for powering hall-effect sensors in Flomec flowmeters. The sensor supply is
only available when the instrument is connected to an external 12-30V DC supply, it is not
available under loop power. 20mA of sensor current is available when the external DC supply is
24V or higher; Flomec flowmeters will only require 12V DC supply to the instrument.
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General