Weight Calibration; Temperature Calibration - OHAUS MB27 Instruction Manual

MB27
5. MAINTENANCE

Weight Calibration

Weight calibration is rarely required. Moisture analyzers use relative weight values to determine the results, so a minor
offset from the absolute weight has little effect on accuracy. OHAUS moisture analyzers have rugged, high quality
temperature stabilized weighing modules that retain their calibration over long periods of time.
(1) Remove any load on the Pan Support including the sample pan.
(2) Press and hold Cal while in the Weigh mode. "CAL" will appear followed by "50.00g".
(3) Place a 50g calibration mass on the Pan Support. The display will show "-----".
(4) Remove the mass when "--0--" is shown on the display. The display will show "-----".
(5) The Analyzer will return to Weigh mode when calibration is complete.
Note: Pressing START will cancel the calibration without saving the changes.

Temperature Calibration

Temperature calibration is rarely required under normal use. If the heating elements become dirty, the usual setting may
no longer produce the same results. A temperature calibration can correct for these changes.
Use only the OHAUS Temperature Calibration Kit (accessory) to perform temperature calibration.
Damage to the Analyzer can occur if using other methods.
(1) Remove the Pan Support for the temperature calibration to start.
(2) Place the OHAUS Temperature Calibration Kit into the temperature chamber (see Kit Instructions). Close Cover.
(3) Press and hold Cal until "Cal" is displayed. When Cal is released "TC100" will appear and the heater turns on.
(4) After 15 minutes, the unit will beep and blink "100" on the display.
(5) Read the thermometer on the Temperature Calibration Kit and press Set to change and match the displayed
value to the thermometer reading.
(6) Press Tare to enter the value. The display will show "TC160" as the heater turns on again.
(7) After 15 minutes, the unit will beep and blink "160" on the display.
(8) Read the thermometer on the Temperature Calibration Kit and press Set to change and match the displayed
value to the thermometer reading.
(9) Press Tare to enter the value. The Analyzer returns to Weigh mode.
(10) Temperature calibration is now complete.
Note: If Tare is not pressed within 10 minutes the calibration will be aborted.
Cleaning
 Disconnect the Analyzer from the power supply before cleaning the Analyzer.
 Make sure that no liquid enters the interior of the Analyzer.
 Make sure the Analyzer is cooled down before cleaning.
Protective glass
Temperature sensor
 Clean the Analyzer at regular intervals.
 Housing surfaces and the temperature sensor may be
cleaned with a lint-free cloth slightly dampened with water
or a mild cleaning agent.
 Glass surfaces may be cleaned with a commercial glass
cleaner.
 Do not use solvents, harsh chemicals, ammonia or
abrasive cleaning agents.
EN-7