Isotech VENUS 4951 BASIC, Руководство по обслуживанию, Страница: 16 / 37

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11 Mode Of Operation
11.1 Metal Block Bath
The thermometers under test are placed into suitable holes in the metal insert. For
the ADVANCED and Site models a calibrated reference probe should be placed into
the insert and the actual temperature can be read from the temperature
indicator. For the Basic models an external temperature indicator should be used.
For traceable calibration the actual value of the insert temperature should be
recorded along with the values from the sensors under test.
Wait until the temperature indicated by the controller and the output of the
thermometer are both stable (see specification for typical values) record three sets
of readings over a period of about six minutes. Check that these readings are
consistent and then calculate their average values. If the device has itself been
calibrated, correct the average values accordingly.
11.2 Blackbody Source
The Blackbody Target Kit (951-06-04) can be added for simple calibration on
infrared thermometers.
Place the target into the well with the supplied thermocouple fitted. For the
ADVANCED and Site models the actual temperature from the thermocouple
can be read from the temperature indicator. For the Basic models an external
temperature indicator should be used. The test IR thermometers should be
compared to this value.
11.3 Surface Sensor Calibration
The Venus can be used with an accessory to calibrate surface sensors.
The surface sensor insert kit (part number 951-06-02), is placed into the calibration
well.
The supplied PRT is placed in the pocket of the surface sensor insert and connected
to the temperature indicator of the Site models. For the ADVANCED and Site models
the actual temperature from the thermocouple can be read from the temperature
indicator. For the Basic models an external temperature indicator should be used.
The test surface thermometers should be compared to this value.