TAL 114 (L) Rev. 4 - 10090982
TEST METHOD FOR OPTIMAIR MASK-MOUNTED PAPR
TESTING THE BATTERY PACK:
The electrical function of the battery
pack can be measured by using a
multimeter and measuring voltage and
resistance across the pins of the con-
nector.
Before Testing:
1. Examine the battery pack for
cracks or other physical damage.
If any of these conditions exists,
replace the battery pack.
2. Fully charge the battery before test-
ing. If the charger failed during the
charging process follow these steps
below to determine the cause.
a. Unplug the charger from the
outlet to reset the charger’s
electronics.
b. Plug the charger back in and
connect a different battery to the
charger.
c. If the charger fails again during
charging the charger is defective
and should be replaced. If the
charger completes a successful
charge the original battery is
defective and should be replaced.
3. Align connector/battery pack like
the diagram below.
Testing the Open Circuit Voltage
across the Switch:
1. Set the multimeter to measure
voltage.
2. Turn the switch on the battery
pack to the "OFF" position.
3. Place the positive probe on pin 2
and the negative lead on to pin 3.
4. The voltage should read 0 Volts.
5. Turn the switch to "ON".
6. The voltage should now read
above 4.8 Volts minimum.
Testing the Open Circuit Voltage
across the Recharge Circuit:
1. Set the multimeter to measure
voltage.
2. The switch can be "ON" or "OFF".
3. Place the positive probe on pin 1
and the negative lead on to pin 3.
4. The voltage should read above 4.8
Volts minimum.
Testing the Thermistor for
Charger Control:
1. Set the multimeter to measure
resistance.
2. The switch can be "ON" or "OFF".
3. Place the positive probe on pin 4
and the negative lead on to pin 3.
4. The resistance should read
between 7K
Ω
and 18K
Ω
. This
measurement is temperature
dependent, so the battery pack
must be between 50˚F and 85˚F.
A battery pack failing any of the
above tests is defective and should
be replaced.
Note:
Attempting to charge a battery
pack which failed the test for "Open
Circuit Voltage Across the Recharge
Circuit" or the tests for "Thermistor
22
A
B
C
1
2
3
4
5
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