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T E C A L 4 2 5 H O P E R A T O R ’ S M A N U A L
TECHNICAL INFORMATION
Brief fault finding notes and lists of replacement parts, accessories and
inserts for the Tecal units are given in this section.
NOTE THAT THIS EQUIPMENT SHOULD ONLY BE DISMANTLED BY
PROPERLY TRAINED PERSONNEL.
REMOVING THE OUTER COVERS
OR BASE EXPOSES POTENTIALLY LETHAL MAINS VOLTAGES.
THERE ARE NO OPERATOR SERVICEABLE PARTS WITHIN THE
EQUIPMENT.
General advice
In the unlikely event that you experience any problems with your Tecal which
cannot be easily remedied, you should contact your supplier and return the
unit if necessary. Please include any details of the fault observed and
remember to return the unit in its original packing. The insert must be
removed from the unit and packed separately within the case. Techne accept
no responsibility for damage to units which are not properly packed for
shipping: if in doubt, contact your supplier.
General fault finding
Over temperature cutout
Your Tecal unit is fitted with two independent circuits to protect it from
overheating. The unit constantly checks that the block temperature does not
exceed its maximum. If for some reason this temperature is exceeded, all
power to the block is cut.
Allow the unit to cool to a safe temperature (less than 100
°
C) before
switching off and check for any obvious causes of overheating before
switching it back on. Switching off the mains power resets the over-
temperature cutout.
Repeated cutouts indicate a serious fault and you should return the unit to
your supplier for repair.
Cleaning your Tecal unit
Before cleaning your unit, disconnect from the power supply and allow to cool
to ambient temperature.
You can clean the case of theTecal with a cloth dipped in water or ethanol
(methanol can also be used). No part of the case or cover should be
immersed in the solvents.
Do not use acetone or abrasive cleaners.
HELP display
If HELP is displayed there is a problem with the internal sensing device. The
calibrator should be returned to your supplier for repair.
