Teledyne 4220 installation and operation guide Attaching the Isco, Lead-Acid Battery

4220 Flow Meter

Section 3 Installation

3.2.5Isco Lead-Acid Battery Teledyne Isco also offers a 6.5 ampere-hour 12-volt rechargeable lead-acid battery to power the flow meter. This battery is similar in size to the nickel-cadmium battery, except somewhat larger, reflecting its 50% greater capacity. For those familiar with nickel-cadmium batteries, operation and maintenance of these batteries differs somewhat.

•Fewer charge-discharge cycles are possible, and a single deep discharge can ruin a battery, if you allow it to run down all the way to the point of cell-reversal.

•There is a linear voltage decrease as the battery discharges, while nickel-cadmium batteries show essen- tially the same voltage throughout discharge.

•Failure to recharge promptly and low temperature operation can also ruin the battery. Proper operation and maintenance is necessary for normal service life.

	For detailed information on these batteries, refer to the Power
	Products Guide. Please read that manual if you intend to use
	lead- acid batteries on your flow meter.
3.2.6 Attaching the Isco	The lead - acid battery installs the same way as the
Lead-Acid Battery	nickel-cadmium battery. Place the battery on top of the case and
	secure it with the rubber draw catches. Attach the connector to
	the flow meter. If your flow meter is permanently installed, you
	may need to allow extra clearance above the flow meter for the
	slightly greater height of this battery.

CAUTION

Do not test either type of battery for the condition of its charge by “sparking” the output (shorting the terminals together with a screwdriver or other tool).

3.2.7 AC Power Supplies Teledyne 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 packs are designed for operation from 120 Volts AC, 50/60 Hz commercial power sources. Alternate versions, designed for operation from 240 Volts AC, 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.

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