10
SECTION 7
Battery Replacement
When only the red lamp illuminates
on the 3M
™
Wrist Strap Monitor
Model 725, it is time to change
the battery. Unplug the wrist strap
ground cord from the Wrist Strap
Monitor Model 725 jack before
proceeding. Remove the top cover
of the Wrist Strap Monitor Model
725 case by squeezing the two tabs
(grooved area located on the bottom
cover) inward while lifting the top
cover. Remove the used battery
carefully by using a pulling-twisting motion to unsnap the battery from the
connectors on the printed circuit board.
Install a new 9 volt alkaline battery by supporting the snap connectors on the
printed circuit board with your fingers, while using a pushing-twisting motion to
fully seat the terminals of the battery into the snap connectors.
Note: Use an alkaline battery for longer life.
Pass the monitor’s ground cord through one of the two exit wire slots in the
bottom half of the case. Align the rear locking tab on the top cover, to the tab
slot on the bottom cover while maintaining the ground cord in the desired wire
slot. Rotate the top cover downward onto the two side locking tabs of the bottom
cover and snap firmly into place.
SECTION 8
Verification Procedure for the 3M Wrist Strap Monitor Model 725
The Wrist Strap Monitor Model 725 cannot be recalibrated after the initial
factory calibration. However, the following steps can be used to determine if the
Wrist Strap Monitor Model 725 is operating within its specifications.
Figure 6
