Comark KM820 User Manual

Calibration Procedure - KM820/V

Verifying Infra-Red Non contact thermometers

• Insert the reference thermometer probe (e.g.

KM20Ref) fully into one of the holes in the Validator.

• Allow the instruments to stabilise to environment

conditions.

• Switch on both instruments after stabilisation

period.

• Point the Infra-Red thermometer at the base of the

Validator while ensuring the nozzle is as far inside
the Validator cup as is possible. Note the variation.
(acceptable error 2.5°C)

Verifying Contact Thermometers

• Insert the reference thermometer probe (e.g.

KM20Ref) fully into one of the holes in the Validator.

• Insert the probe of the Instrument being veried

fully into the other hole in the Validator.

• Allow the instruments to stabilise to environment

conditions.

• Switch on both instruments after stabilisation

period.

• Note the variation. The acceptance error will be

dependent on the specication of the unit being
veried.

Note: The time for the instruments to stabilise will be dependent on
the validator reaching its environment temperature, which at freezer
temperatures could be up to 2 hours.

Care must be exercised when handling the validator after
exposure to low temperatures.

Comark Instruments,

Norwich, Norfolk NR6 6JB England

Telephone: 01603 ([phone]

Fax: 01603 ([phone]

Stock No. 17064 Issue 5

52 Hurricane Way,

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