3M 725 User Manual - Page 11

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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

Figure 6

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

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.