Parks 915-BL, Operating & Service Manual

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915-BL Dual Frequency Doppler
Maintenance and Service
Cleaning the Instrument
Clean the outside of the instrument as needed. First turn off the power and unplug the battery charger.
Remove dust with a soft cloth or small paint brush. Wash with a soft cloth dampened in a mild solution
of detergent and water. Never use abrasive cleaners. To disinfect surface, use a soft cloth dampened
with liquid disinfectant or use a surface germicidal cloth. After cleaning/germicidal agent dries, remove
any residue with a soft cloth dampened with water. Never let the inside of the instrument get wet.
Cleaning the Probes
1. Remove the gel with a soft tissue after each probe use.
2. Wash any dried gel off the probe with running water. DO NOT scrape off dried gel to avoid
damaging the coating over the crystals.
3. User may opt to wipe probe with alcohol, surface germicidal cloth, or liquid disinfectant; rinse probe
with warm water to remove any residue after cleaning/germicidal agent dries. Do not use bleach.
Do Not Autoclave the Probes
Temperatures above 57.2 degrees Celsius (135 degrees Fahrenheit) destroy the crystal activity and
cause the covering over the individual cables and the outer sheath to shrink and crack. With a raised
temperature, a severe loss of sensitivity will occur. Autoclaving will void the probe warranty.
Tuning
The Doppler unit is tuned by the manufacturer to match the frequency of the probe, and the tuning of
the circuit is very stable. If sensitivity problems are suspected, do not attempt to adjust the instrument;
contact your sales representative or Parks Medical Electronics, Inc.
Routine Maintenance
The Doppler unit does not require regularly scheduled maintenance. The battery may need to be
replaced every two or three years. The probe jacks can wear out with extended use.
To Check the Battery:
1. Determine how long, at most, the Doppler is kept on continuously.
2. Recharge the battery for at least 8 hours.
3. Connect a dry probe to the unit, turn the unit on, and turn the volume 2/3 of the way up.
4. After one hour or twice the longest period of continuous use, whichever is greater, check the
battery indicator lamp. If the lamp is blinking, replace the battery.
To Check the Probe Jacks:
1. Bend back the four sections of the ground fl ange of the plug of a
defunct probe.
2. Insert the center pin of the plug into each probe jack.
3. If there is no friction or resistance, replace the probe jack.
4. If you do not have a defunct probe, contact technical support.