Hanna Instruments HI 93510 - Manual (Page 7)

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When the battery level is below 10%, a warning
symbol will blink on the LCD to indicate a low
battery condition.
If the battery level is low enough to cause erroneous readings, the
Battery Error Prevention System (BEPS) turns the meter off.
Immediately replace the batteries with new ones.
The batteries are accessed by separating the front and the back
halves of the meter: unscrew the 4 screws on the back of the meter
and carefully replace the three batteries located in the battery
compartment, while paying attention to their polarity. Reattach the
back making sure that the gasket is in place and tighten the 4
screws to ensure a watertight seal.
Battery replacement must only take place in a non-hazardous area
using 1.5V AA (IEC LR6) alkaline batteries.
BATTERY REPLACEMENT USER CALIBRATION
The HI 93510N and HI 93522 models can be calibrated at 0°C by
using an ice bath.
• Prepare an ice bath with approximately equal volumes of distilled
water and chopped ice made from distilled water.
• Immerse the temperature probe in the center of the ice bath,
taking care not to touch the ice with the probe tip.
• Ensure that the meter is measuring a temperature within ±3°C.
• To enter the Calibration mode, press and hold the CAL button for
about 5 seconds.
• The CAL tag turns on to indicate that
the Calibration mode has been entered.
Note: If the measurement is outside the
±3°C window, the meter does not
enter Calibration mode.
• When the meter reaches the stability condition, which is detected
when the measurement remains within ±0.2°C for 5 seconds, the
calibration is accepted and the reading becomes 0°C (32°F).
• The meter then automatically returns to normal mode.
Note: To exit the Calibration mode at any time, press the CAL key.
Note: User calibration cannot be entered in relative or in T1-T2 mode.
Note: User calibration is only performed on the current channel
displayed (T1 or T2).
All Hanna thermometers have been accurately pre-calibrated at the
factory. It is generally recommended to have all thermometers recali-
brated at least once a year. For an accurate recalibration, contact your
nearest Hanna Customer Service Center.
Hanna Accuracy Test Plugs provide a quick and easy way to check the
meter's accuracy by simply connecting these Test Plugs to the probe
connector of the meter. If the reading differs by more than ±0.4°C
(±0.8°F) from the Test Plug value, the meter is due for recalibration.
Choose the right Test Plug to suit your needs:
HI 762-18C
Calibration test key, -18.0°C
HI 762000C Calibration test key, 0.0°C
HI 762070C Calibration test key, 70.0°C
HI 762-004F Calibration test key, -0.4°F
HI 762032F
Calibration test key, 32.0°F
HI 762158F Calibration test key, 158.0°F
FACTORY RECALIBRATION
Recommendations for Users
Before using these products, make sure that they are entirely suitable for the
environment in which they are used.
Operation of these instruments in residential area could cause unacceptable inter-
ferences to radio and TV equipments, requiring the operator to take all necessary
steps to correct interferences.
Any variation introduced by the user to the supplied equipment may degrade the
instruments' EMC performance.
To avoid electrical shock, do not use these instruments when voltages at the mea-
surement surface exceed 24VAC or 60 VDC.
To avoid damages or burns, do not perform any measurement in microwave ovens.
Note: To clean the meters, do not use aggressive detergents. It is
recommended to use water.