25/08/2004 ©
Söring
Service-Manual Arco- and RF-units
1
not valid for A-3000/ -2000
2
not valid for Arco-2000
-87-
3
not valid for MBC600
4
not valid for Arco-1000
14.3.7. Measurement of gas-flow
1
For these measurements a gas-flow meter is required (e.g. gas-flow meter from Brooks)
or an electronic gas flow meter calibrated for Argon at normal pressure.
- Connect gas-nozzle of gas handpieces and probes to the flow-meter.
- Select Argon-step 1 - 5 (for values see table "Technical gas data") and check gas-
flow for each step.
Generally the gas-flow is correct if it does not deviate more than ± 25% from the nominal
value.
14.3.8 Test of gas flow check
For gas delivery the equipment checks whether a handpiece delivers gas. For this
purpose the flow is measured and regulated. Furthermore a check of gas pressure at the
input of the equipment is done. If the pressure at the input is too low (empty gas bottle,
pressure below 4.5 bar) the gas shortage indication lights up and a warning signal
sounds. If gas flow is impossible due to a clogged handpiece hose a warning is also
given. In both cases the argon coagulation is inhibited. Checking is done with a
connected Argon handpiece.
- Select Argon step 3 and start equipment. Close gas valve at the gas bottle. After
pressure drops, alarm sounds, gas shortage is indicated and equipment switches
off.
- Open gas valve again and start equipment, then kink the hose of the Argon
handpiece (interrupt gas flow). Equipment must switch off, alarm tone and
indication "gasflow interrupted" must appear.
14.3.9. Check of handpiece allocation-relay
In case the equipment has several handpiece sockets both monopolar handpieces are
connected. With activation of one of the handpieces it has to be checked whether the non
activated handpiece delivers power. In case power is delivered, one of the handpiece
allocation-relays is defective.
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