Remove the top cover of the 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
Install a new 9 volt alkaline battery by supporting the snap connectors on the printed circuit board with your fingers, while using a
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 Model 725 Monitor
The Model 725 Wrist Strap Monitor cannot be recalibrated after the initial factory calibration. However, the following steps can be used to determine if the Model 725 is operating within its specifications.
Equipment Needed:
•Resistance Substitution Box (RSB), 1 Ohm to 45 Megohms ± 1%.
•One two conductor cable with standard 3.5 mm (miniature) phone plug attached on one end and appropriate connectors on the other end to connect to a RSB.
•Two single conductor wires with clip style on one end and appropriate connectors on the other end to connect to a RSB.
Note:
Two conductor cables must have an isolation resistance of >1 Gigohm between conductors. Two separated wires may also be used to obtain higher isolation resistance.
Procedure:
a)Install a new 9 volt battery into the Model 725.
b)Short the dual conductor ground clip by attaching to a conductive metal object such as a coin.
c)Plug the phone jack test cord into the wrist strap jack on the front of the monitor and attach the other end of the cord to the RSB.
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