c. Intensity Selection. Turning the control dial clockwise (from 0 - 100) turns on
the unit and increases the power available at all outlets when you depress the foot switch
or switching handle. Unless you have sufficient experience to be familiar with the proper
setting for each technique, it is recommended that you make the initial selection at a lower
setting. Then, gradually increase the power until you reach the desired level.
The dial settings on the Model 733 hyfrecator are for reference only and do NOT
represent actual output. The actual output with respect to a dial setting will vary
and will be different from that of older models.
The output of the hyfrecator can exceed 7,000 volts (v). As you can receive severe
burns, you must follow all safety precautions.
a. If you do not remove fuse F1, turn down the power to a safe level. If F1 is
removed, the unit does not energize.
b. Put the foot switch in an area where it cannot be accidentally stepped on.
c. If you are not using the hand piece, disconnect it from the front of the unit.
d. Keep your work area clean, orderly, and uncluttered.
e. Do not place books and diagrams on top of the hand piece. The weight could
easily depress the hand switch.
f. Turn off the power to connect or disconnect the foot switch cables.
g. Do not exceed the limits of the system. According to Birtcher, the Model 733
Electrosurgical Unit has a 25 percent duty cycle at 30 watts (w) with 500 ohm load (10
seconds on, 30 seconds off).
h. Calibrate the unit after repair using an accurate and calibrated electrical test set.
i. Read the Model 733 Operating and Service Manual before operating or
performing maintenance on this unit.
QUARTERLY PREVENTIVE MAINTENANCE
Preventive Maintenance Checks and Services is performed on a quarterly basis.
It consists of cleaning, a visual inspection, and an operational checkout.
a. Cleaning. The case is made of a durable cycolac plastic. However, do not use
harsh chemicals. Use soap and water and a cloth or sponge to clean the case.