Teledyne Max-5 - Combustion efficiency analyzer - Manual (Page 23)

case, and lift the hood off the unit.
BATTERY RECHARGING
The rechargeable Nickel-Cadmium batteries need to be recharged after about 8 hours of use.
To Recharge the Batteries:
1.
Turn the back panel power switch off.
2.
Plug the power cord (connector end) into the back panel AC power receptacle and
plug the other end into the correct voltage outlet.
3.
Allow the batteries to recharge for the required line power:
100VAC, 50/60 Hz - 24-30 hrs.
115VAC, 50/60 Hz - 14-16 hrs.
230VAC, 50/60 Hz - 14-16 hrs.
BATTERY REPLACEMENT
Rechargeable Nickel-Cadmium batteries last for many years; however, you may need to replace
them after a period of time. Before you replace the batteries, perform the following tests (make
sure the MAX 5 is unplugged from the wall):
To Test the Power Supply (charging circuit):
1.
Open the MAX 5 as instructed in Steps 1 and 2 under the “To Replace Batteries” section
below.
2.
Locate R39 resistor.
3.
Put test meter leads across R39 resistor. The reading should be 40 mVDC +2 mVDC
when you plug the AC power cord into the wall.
4.
If you get the correct reading in step 3, this indicates that the charging circuit is okay.
To Test the Batteries:
1.
Unplug the MAX 5 from the wall.
2.
Put the red lead from the test meter to J2 pin 1 (red) and the black lead to J2 pin 2
(green). The reading should be approximately 7.5 VDC. Move red lead to J2 pin 3
(black). The reading should be approximately -5 VDC. If your readings do not equal
these, replace the batteries (see “To Replace Batteries” section below).