FUNCTIONAL TESTS Chapter 4
4 - 1
4.1 BATTERY LIFE CHECK
The pump is provided with a NiMH battery pack. The battery pack is considered
acceptable when it can operate at 80% capacity or better, following a full charge. Battery
capacity can be estimated as follows:
1. Using the standard battery charger, charge the battery (with the pump turned off) for at
least 16 hours.
2. Remove the battery pack within 15 minutes after disconnecting the charger. See
“Battery Replacement”, in chapter 7.
3. The no-load voltage must be 6.5V or greater. A reading of less than 6.5V may indicate
a defective cell.
4. Connect a 135 ohm, 1/2 watt (or greater) resistive load across the battery pack.
NOTE
Resistor leads or other pins mated with the battery connector sockets
must not exceed 0.025 inch diameter. The recommended pin is Molex
style #70021, part #16-02-0115, available from Molex, Inc. Lisle, IL
60532 (847-969-4550).
5. Continuously monitor the battery voltage and discharge time. Use of a strip-chart
recorder is recommended. The battery pack is acceptable if the battery voltage is 5V or
greater after 19 hours of discharge through a 135 ohm load.
4.1.1 Replacement Recommendation
In general, the service life of rechargeable batteries is based on many factors, including
construction, size, usage, frequency of charging and discharging, and depth of discharge
prior to recharge. To minimize the chances of experiencing a problem with rechargeable
batteries, it is advisable to replace them before their service life is expended.
Baxter® advises that pump battery replacement be made part of a regularly scheduled
maintenance program. Baxter® recommends that the pump’s rechargeable battery be
replaced every 16 months.
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