OPERATIONAL GUIDE
INITIAL PREPARATION
Each meter is supplied complete with
batteries.
Remove the back cover, unwrap the
batteries and install them while pay-
ing attention to their polarity.
Connect the temperature probe to
the connector on the top of the
meter.
To switch on, press the ON/OFF key
on the front of the meter.
If the meter does not come on,
make sure that the batteries are correctly installed.
The thermometer will carry out a self diagnostic test routine,
the LCD will show all segments for a few seconds (or as long
as ON/OFF is held), followed by the
percentage indication of the remain-
ing battery life.
The thermometer then enters normal measurement mode.
If a temperature probe is plugged in, the meter displays
the measured temperature.
If no probe is plugged in, or if
reading is over-range, the display
shows flashing dashes.
If a measurement is slightly over the range of the meter
specifications, the display flashes the closest full-scale value.
To switch the thermometer OFF, press the ON/OFF key.
MEASURING SCALE (°C/°F)
Theinstrument is factoryset to the°C scale, butmeasurements
can be performed in either the Celsius or Fahrenheit scale.
Press the °C/°F button to select the
desiredscale.
HOLD MODE
The HOLD function is activated by
pressing the HOLD key.
The measured temperature is held on
the display until HOLD is pressed
again.
The "H" tag blinks on the display to
indicate the HOLD mode.
BATTERY REPLACEMENT
The instrument is powered by four 1.5 V alkaline batteries
and is provided with the Battery Error Prevention System
(BEPS), which turns the unit off when a low battery signal
is detected.
When the remaining battery level is
less than 10%, a warning symbol
blinks on the display to indicate a
low battery condition.
It is recommended to replace the batteries as soon as the
low battery condition is detected.
Battery replacement must only take place in a nonhazard-
ous area using four 1.5V alkaline batteries.
In order to replace rundown batteries, simply remove the
two screws on the rear cover of the instrument and replace
the four batteries with new ones paying attention to the
correct polarity.
Reattach the cover and tighten the two screws.
All Hanna thermometers have been accurately pre-calibrated
at the factory.
It is recommended to have all thermometers recalibrated at
least once a year. For an accurate annual recalibration,
contact your nearest Hanna Service Center.
Hanna Accuracy Test Plugs provide a quick and easy way
to test 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 Test
Plug closest to your measurement range to best suit your
needs:
HI 765-18C Calibration key, –18.0°C
HI 765000C Calibration key, 0.0°C
HI 765070C Calibration key, 70.0°C
HI 765-004F Calibration key, –0.4°F
HI 765032F Calibration key, 32.0°F
HI 765158F Calibration key, 158.0°F
FACTORY RECALIBRATION
Note: Although the display is frozen, internally the meter
continues measuring and updating Hi and Lo values.
HIGH/LOW TEMPERATURES
The maximum and minimum tem-
peratures are continuously monitored
and displayed in the lower portion of
the LCD.
Note: When reading goes over-range, the Hi and Lo values
display dashes until cleared.
CLEAR FUNCTION
Upon pressing the CLEAR key, the
current reading is assigned to the
highest and lowest temperature val-
ues. The High/Low values may be
cleared at any time during measure-
ment.
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 areas could cause unacceptable interference to radio
and TV equipment, requiring the operator to take all necessary steps to correct interference.
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 voltage at the measurement surface
exceeds 24VAC or 60VDC.
To avoid damage or burns, do not perform any measurement in microwave ovens.
TEMPERATURE PROBES & ACCESSORIES
Hanna offers a wide range of probes to meet your needs
with air, liquid, penetration and surface measurements.
All Hanna temperature probes are pre-calibrated at the
factory and ready-to-use. These interchangeable probes
make it possible to switch from one probe to another
without requiring recalibration.
Hanna probes are also available in different handle colors
to avoid cross contamination during testing.
PROBES WITH 1 m(3.3’) CABLE
HI 765A Air probe with white handle
HI 765BL General purpose liquid probe with black handle
HI 765L General purpose liquid probe with white handle
HI 765PBL General purpose penetration probe with blue
handle
HI 765PG General purpose penetration probe with green
handle
HI 765PR General purpose penetration probe with red
handle
HI 765PW General purpose penetration probe with white
handle
HI 765PWL Penetration probe with white handle
HI 765W Wire probe without handle for hard-to-reach
places
PROBES WITH 10 m(33’) CABLE
HI 765A/10 Air probe with white handle
HI 765L/10 General purpose liquid probe with white handle
HI 765PBL/10 General purpose penetration probe with
blue handle
HI 765PG/10 General purpose penetration probe with green
handle
HI 765PR/10 General purpose penetration probe with red
handle
HI 765PW/10 General purpose penetration probe with white
handle
HI 765W/10 Wire probe without handle for hard-to-reach
places
OTHER ACCESSORIES
HI 710002 Soft carrying case
HI 721317 Hard carrying case (340x230x90 mm)
HI 721308 1.5V AA size, alkaline battery (10 pcs)
