Topcon CT-60/CT-80

Readings in ( ) or blank
If the instrument is firing correctly but the readings are in brackets or blank, the unit requires a service. Firstly check and clean the front glass around the puff tube. Clean the glass with a soft lens cloth and do not use any alcohol. The CT-80 front glass is held in with glue and will fall out if cleaned with alcohol. This also applies to the 2 small opaque lenses either side of the puff tube.

If the front glass is clean and the instrument still does not work correctly, call for a service visit. We can usually make good improvements to the operation of the unit.

Instrument not firing
If the instrument tries to fire but the air puff is very weak, it is usually caused by 1 of 2 problems. The piston may be stuck in the cylinder and if this is so, we can perform a small modification and service the assembly. Sometimes, the piston breaks from it's connecting rod and in this case, it will require a new piston/cylinder assembly. To test the unit, switch the instrument on and press the "test" button. If the piston is not working for whatever reason, it will display the message "NG-". If this happens, call us for a service visit.

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