Adjustment Instructions; Step-By-Step Instructions - GE TONOPORT V Service Manual

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Revision H

Adjustment Instructions

Only the pressure amplifier needs to be calibrated. This is done by switching on

the TONOPORT V and waiting until the time is displayed on the LCD.

Measure the direct voltages at TP2 and TP3. This is done by turning the

trimming potentiometer R59 with a screwdriver until the voltages at TP2 is 1.8

±0.1 V and at TP3, 2.0 ±0.1 V.

Press "INFO" four times, LCD indicates "H 4".

Press "START" once, a 2-digit figure is displayed on the LCD.

Use a screw driver to turn the trimming potentiometer R53 until the LCD

indicates a value of approx. 50.

Connect a reference pressure gauge, a rubber bulb and air container (1 l) to the

TONOPORT pressure connector and press "START".

Using the rubber bulb generate a pressure of 100 mmHg in the tubing system

and watch the LCD.

Using a screwdriver, turn the trimming potentiometer R40 until the LCD

indicates a value of 100.

Also check the values indicated on the LCD at pressures of 50 mmHg, 150

mmHg and 200 mmHg. Max. permitted deviation: ±3 mm Hg.

Switch the TONOPORT off.

TONOPORT V

2001589-023

10-1

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