27/04/04 ©
Söring
Users manual RF-units
1
not valid for MBC600
-36-
9.3.3. Check of RF generators and safety devices
Function test of RF generators, RF relays and leakage current detector.
The following equipment is needed:
-Measuring device for RF surgery equipment for measurement of output power and RF
leakage current, e.g. BIO-TEK RF-302
-Handpieces
-Connecting cable patient electrode (original
Söring
)
-cables, connecting clamps
Preparation
-Connect RF measuring device to Arco respectively MBC in accordance with instruction
manual. According to type approval the unit based on class CF (PE not capacitively
grounded). Current leakage measurements have to be carried out according to this class.
Based on the type approval the unit is in the CF class. The measuring of the current leakage
has to be done with regard to this type of approval class!
9.3.4. Power measurement
(Use RF measuring device in position “power measurement” and with the listed (table) resistor. Tolerance should be
within 20% of the value in the table)
Values for power output see table in chapter 8.
In general the function is correct if the measured RF power does not deviate more than ±20%
from the nominal value.
9.3.5. Current Leakage test
Measurement is performed with a load resistance of 200
Ω
, a monopolar RF handpiece and the
genuine Söring connecting cable. During this measurement the cable must not be rolled up.
Measuring equipment is to be operated for PE current and active electrode current
measurement. (perform both modes)
-Check all modes and power steps. Current leakage must be less than 150mA.
9.3.6. Test of handpiece allocation relay
If the equipment provides several handpiece sockets and both monopolar handpieces are
connected it has to be checked if every channel refers to the correct outlet. When one
handpiece is activated it has to be tested whether the not activated handpiece delivers power.
In that case one of the handpiece allocation relays is defective.
9.3.7. Test of patient electrode recognition
-Connect handpiece and patient electrode to equipment
-If a divided patient electrode is used:
-Connect patient electrode according to instructions and switch on equipment
> Patient electrode alarm and operational inhibition must then be activated
> Patient electrode alarm must disappear and reappear
-If a non-divided patient electrode is used:
-Alarm must sound when patient electrode is removed from connector socket.
