(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 7KΩ and 18KΩ. This measurement is temperature dependent, so the battery pack
must be between 50˚F and 85˚F.
WARNING!
A battery pack that does not pass any of the above tests is not functioning properly must be replaced.
Failure to follow these warnings can result in serious personal injury or death.
NOTE:
Attempting to charge a battery pack which failed the test for "Open Circuit Voltage Across the Recharge Circuit" or the
tests for "Thermistor Resistance" will result in an indication of charge failure status by the charger. In this case, the battery
pack is defective and should be replaced.
Indication of charge failure status when attempting to charge a battery which passes these tests is an indication of charger
failure and the charger must be replaced.
7.2
Testing the Motor Blower
The function of the motor-blower can be tested by using an MSA flowmeter and a multimeter. (MSA adapter P/N 491046 and
flow check meter P/N 487995 are required to run the flow test)
Before Testing
(1)
Examine the motor-blower for cracks or other physical damage. If any of these conditions exists, replace the battery
pack.
(2)
Using a good battery pack as determined by the previous tests, fully charge the battery until a full charge is achieved.
Testing the Flow of the Motor Blower
(1)
Assemble the motor-blower to the battery pack.
(2)
Attach the motor-blower to the flow meter per the supplied instructions.
(3)
Turn on the MM PAPR and notice the volumetric flow.
(4)
This flow must be above 115 lpm.
Testing the Resistance of the Motor
(1)
Refer to
for proper pin locations.
24
OptimAir® MM PAPR
7 Test Method for the OptimAir MM PAPR
US
