Parks 915-BL, Operating & Service Manual

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9
915-BL Dual Frequency Doppler
Operating Instructions
Turn the volume up to near maximum to search for deep arteries, small or obstructed arteries, and 4.
veins.
The ▪ Doppler sounds associated with low-velocity blood fl ow have a very low pitch.
The higher volume setting will also increase the transient background noise. ▪
Avoid unnecessary movement of the probe on the skin to minimize transient background noise. 5.
Using the Cautery Suppressor
To Minimize Cautery Interference:
1. Keep probe wires as far away from the cautery wires as possible.
2. Make sure that the patient is well grounded with the cautery machine’s grounding plate.
3. Do not hang the Doppler by its handle on an IV pole; hang it with nonconductive material.
Setting the Cautery Suppressor Level
Position the probe to obtain the best fl ow sound from the patient. 1.
After the patient is anesthetized and before the cautery is used, gradually turn up the cautery 2.
suppressor level until the patient’s blood fl ow sounds start cutting out on peak sounds.
Turn the control down (counterclockwise) until the sounds are again normal. 3.
If the patient’s fl ow varies, you may need to make this adjustment again. 4.
Shutting Down the Instrument
Turn the instrument off. 1.
Wipe the gel off of the probe with a soft tissue. 2.
Disconnect the probe from the Doppler only if necessary for cleaning; probe jacks wear out with ▪
repeated connecting/disconnecting of the probes.
Connect the instrument to the 3. battery charger.
Charging the Battery
The 915-BL comes with a 24VDC 0.63 A battery charger. The instrument should be connected to the
battery charger after the last usage of each day.
Plug the connector of the battery charger into the battery charger jack on the front of the instrument. 1.
Plug the charger into an AC outlet (use appropriate plug adapter for outlets other than 120 V). 2.
The charger indicator lamp will light up to show that the Doppler battery is being charged.
The 915-BL has two battery-charging safety features:
The Doppler cannot be operated while the battery is being charged. The battery is disconnected 1.
from the unit while it is being charged; only the charging circuit is active.
The battery cannot be overcharged.
2.
A blinking battery indicator lamp warns that the battery needs to be charged. The unit will continue to
operate for a few hours if necessary after the light begins to
fl ash, but should be recharged as soon as
possible. Allow 12 hours to completely recharge the battery. Letting the battery completely discharge
shortens the life of the battery.
Charging Doppler in the Optional Carrying Case
If your Doppler came in a carrying case, Parks recommends that you keep the unit on charge with the
carrying case lid off. The carrying case has slip hinges that allow for easy removal of the lid.
If you do not remove the lid during charging, be sure the charger cord is in the small rubber grommeted
half-moon cutout before closing the lid of the carrying case. This will prevent damage to the charger cord
which might lead to electrical shock.