4210 Flow Meter
Section 3 Installation
3-4
mation, on these batteries, refer to the Power Products Guide.
Read the Guide if you intend to use lead-acid batteries on your
flow meter.
CAUTION
Do not test either battery for its charge condition by “sparking”
the output (shorting the terminals together with a screwdriver
or other tool), as serious damage to the batter can occur.
3.2.5 AC Power Supplies Isco also offers two different AC power supplies: the High
Capacity Power Pack and the Battery-Backed Power Pack to
power the flow meter. These power supplies are designed for
operation from 120 VAC, 50/60 Hz commercial power sources.
Alternate versions, designed for operation from 240 VAC, 50/60
Hz, are also available and are intended primarily for export.
Both are supplied with a line cord for convenient attachment to
the AC power source, and are capable of operating the flow
meter. The Battery-Backed Power Pack provides 12 VDC at 5
Amps, and is backed up by a 1.2 Ampere-hour nickel-cadmium
battery. This is built in a package the same size as the standard
power supply, and is intended for use where short-term power
interruptions are frequent but unacceptable for flow meter oper-
ation.
Mount the power supply on top of the flow meter cabinet the
same as described for the battery. Secure the power supply with
the two rubber draw catches pulled over the brackets on the ends
of the case. Attach the short cable with the smaller connector to
the top connector on the right side of the flow meter case.
Connect the longer cord with the plug on it to an AC outlet. Refer
to the Power Products Guide for details concerning charging the
batteries with the power pack.
3.2.6 External 12 Volt Direct
Current Source
You can also power the flow meter from an external 12 VDC
source, such as an automotive, motorcycle, or marine battery.
Many people have found that a deep-cycle marine/RV battery is
particularly well-suited to this application. However, you will
have to mount batteries of this type separately, as they are too
large to fit on top of the flow meter. Isco offers a special optional
connect cable to power the flow meter from a separate battery.
Mount the battery securely in an upright position, so it will not
tip over, or have its cable easily pulled off. As advised previously
for the nickel-cadmium battery, do not check the charge condition
of lead-acid batteries by “sparking” the output cables (momen-
tarily shorting the wires together).
CAUTION
Be sure of proper polarity before attaching clips to the battery.
Never connect the flow meter to a source of unknown polarity
or voltage. If in doubt, check with a reliable DC voltmeter.
Never connect the flow meter directly to an AC power source
of any voltage under any circumstances. Charge the battery in
accordance with the manufacturer's instructions.
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