Erbe T175 ESU User manual

Title: Erbe T175 ESU Date: 12-25-2012
By: Erbe
File = Erbe T175.doc

1. General
Applies to model T175. Comment from a website:
“exclusively designed for being used in the field of veterinary
medicine or for export purposes”.

2. Reference Documents
Erbotom T175 Operating Instructions.
Erbotom T175 Service Manual”

3. Tools / Fixtures / Accessories

 Electrosurgical Analyzer: ex: Dempsey 443 or better.
 Patient Plate Cable, Bipolar Cable/Forceps.
 Hand Control Pencil/Cable, Footswitch.
 Safety Tester

DISCLAIMER: THIS PROCEDURE PROVIDED "AS IS" AND
WITH POSSIBLE FAULTS. USER MUST VERIFY BEFORE USE.
NEITHER PROVIDER NOR WEBSITE ASSUMES ANY
RESPONSIBILITY FOR ITS USE.

T175 ESU

4. Performance Verifications

4.1. Inspection

Check unit for any damage; i.e. connectors, knobs, the
power cord and the footswitch with its cable.

4.2. With no accessories plugged in, turn on unit. Verify

that the red pilot lamp illuminates.

4.3. Setup

Connect analyzer to ESU using a handcontrol pencil-­wire the pencil chuck to the analyzer active (this will
simultaneously check handcontrol sense circuits.)
Connect a patient plate cable between the generator’s
patient plate jack over to the same on the analyzer. Set
analyzer load to 300 ohms if available. Set the
generator’s hemostasis dial to minimum.

Note: This generator’s output power maximizes for 300 ohm load
resistance. The analyzer suggested has load settings of only 500 and 125
ohms. Refer to load curves in Appendix for corrections.

4.4. Cut Mode

With cut and coag intensity/power dials (Pussance) at
zero, key the unit in Cut mode, using either the cut
pedal (use the mono/bipolar selector buttons to direct
the footswitch to activate monopolar) or the cut-rocker
switch on the hand pencil. The Cut indicator lamp and
a continuous (adjustable) tone occur. Gradually turn
power to max dial and note power into analyzer. Do not
let generator run continuously at this level. Refer to
table in Appendix for acceptable results which depend on load..

T175 FOOTSWITCH

MONOPOLAR PENCIL WITH CORD

PATIENT PLATE CABLE

DEMPSEY 443 ANALYZER

Note: If both pedals are depressed, no output should occur.

4.5. Coag Mode

With cut and coag power/intensity dials at zero, key the unit in Coag mode, using either the
coag pedal or coag rocker switch on the hand pencil. The Coag indicator lamp and a distinct
continuous (adjustable) tone occur. Gradually turn coag power to max dial and note power into
analyzer. At max levels, run generator only long enough to get a reading. Refer to the table in
Appendix for acceptable results which depend on load.

4.6. Patient Plate Monitor Circuit.

With generator at idle, remove the patient plate plug from its panel connector. A loud non­adjustable tone will activate, and the red patient plate lamp will light.

4.7. Blend Mode

Not addressed.

Note: Bipolar can be activated with either the footswitch or by the load sensing of the bipolar forceps.

4.8. Bipolar Mode

Using the bipolar forceps cable, connect the analyzer to the generator’s bipolar output
connector. Set analyzer load to 125 ohms or lower (75 ohms if possible). With the Bipolar dial
at zero, use the footswitch to key the unit and note the distinct audible tone. Gradually turn
power to max dial and note power into analyzer. Refer to charts in appendix for acceptable
results, which depend on load.

Activate the bipolar mode by touching the bipolar output (via forceps for example) to a load.
After a couple of seconds (internally adjustable) the unit will activate in bipolar. The activation
can also be used to measure power as above.

4.9. Bipolar Mode (or other mode)

Verify volume adjust on front of unit.

4.10. Other Safety Checks

Using the safety tester, check that line leakage with ground open is less than 50 uA.
Using the safety tester, check that ground lead resistance is less than 0.15 ohms.
Resistance between active and patient plate > 2megohms (yearly)
Measure low frequency leakage currents yearly.

4.11. RF Leakage -- ESU analyzers read RMS current, and when appropriately connected, can

display RF leakage. Limits are below. RF leakage is an infrequent field check but should not
be overlooked for older equipment.

The standard IEC 60601-2-2, particular requirements for the safety of high frequency surgical
equipment, limits this parameter to a maximum of 4.5 W measured on a 200 Ω non-inductive
resistor for monopolar applications (150mA in this case).

APPENDIX

Note: Pussance = power

Specifications:
Monopolar cutting 175 watt, Monopolar coagulation 100 watt, Bipolar 50 watt.
Monopolar Frequency 450 Khz