Power Products Guide
Section 3 Batteries for Flow Loggers
3-2
Figure 3-2 Flow Logger Alkaline Battery
Put the batteries into the flow logger case with the contact
springs pointing towards the bottom of the battery compartment.
Positioning is not critical, because the contact strips in the
bottom of the compartment are laid out for universal acceptance.
These batteries are available from Teledyne Isco or from any
local hardware, sporting goods, or electronics wholesaler.
Note that this type of battery is not rechargeable, despite occa-
sional claims to the contrary. Attempting to recharge alkaline
batteries is reputed to be hazardous in some instances. Never
dispose of alkaline batteries in a fire. Always dispose of dis-
charged alkaline batteries in conformance with state and local
environmental regulations.
3.4 Flow Loggers -
External Power
Sources
If you want to use an external power source with the flow loggers,
almost any of the Isco batteries and power supplies are suitable.
The flow loggers have an external power connector on the case
and there is a two-foot cable available to connect to an external
power source.
Note that if you suspend a flow logger from the rungs of a man-
hole, use of an external power source is not practical, as you must
secure both the flow logger and the battery. It is generally not
possible to use an AC-powered unit in a manhole due to the lack
of availability of an AC power connection. The following devices
are suitable as external power sources for the flow loggers:
Batteries
• Isco Model 946 Lead-Acid Battery
• Isco Model 948 Lead-Acid Battery
• 12-Volt R-V Deep-Cycle or Marine Battery
You can use the Isco Model 934 Nickel-Cadmium Battery with
the flow loggers, but Teledyne Isco does not recommend it.
This battery is not ideal for use with the flow loggers because
of its self-discharge characteristic. Because the flow loggers
need to operate over the long-term, the nickel-cadmium bat-
tery is more likely to run down from self-discharge than it is to
run down from the flow logger power demands on it.
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