INSTRUCTION MANUAL
HI98107
Pocket-sized pH Meter
Warranty
This meter is warranted for a period of one year against defects in workmanship
and materials when used for their intended purpose and maintained according to
instructions. The electrode is warranted for a period of six months. This warranty is
limited to repair or replacement free of charge. Damage due to accidents, misuse,
tampering or lack of prescribed maintenance is not covered. If service is required,
contact your local Hanna Instruments Office. If under warranty, report the model
number, date of purchase, serial number and the nature of the problem.
If the repair is not covered by the warranty, you will be notified of the charges incurred.
If the instrument is to be returned to Hanna Instruments, first obtain a Returned Goods
Authorization (RGA) number from the Technical Service department and then send it
with shipping costs prepaid. When shipping any instrument, make sure it is properly
packaged for complete protection.
IST98107N 06/18
Accessories
Electrode Storage Solution
Code
Description
HI70300M
Electrode storage solution, 230 mL bottle
Electrode Cleaning Solution
Code
Description
HI7061M
General purpose cleaning solution, 230 mL bottle
pH Buffer Solution
Code
Description
HI70004P
pH 4.01 buffer solution, 20 mL sachets (25 pcs.)
HI70007P
pH 7.01 buffer solution, 20 mL sachets (25 pcs.)
HI70010P
pH 10.01 buffer solution, 20 mL sachets (25 pcs.)
HI77400P
pH 4.01 & 7.01 buffer solution, 20 mL sachets
(10 pcs., 5 ea.)
HI770710P
pH 10.01 & 7.01 buffer solution, 20 mL sachets
(10 pcs., 5 ea.)
Care and Maintenance
To obtain the highest accuracy for measurements it is important to follow these tips:
• Calibration is only as good as the buffers being used. The pH buffers value change
over time once the sachets are opened. Fresh buffer should be used for each
calibration.
• The electrode should be rinsed with purified water each time before placing in
buffer or sample to be tested.
• When the meter is not in use it is important to add several drops of storage solution
to a sponge in the protective cap to keep the electrode hydrated. If storage
solution is not available, then pH 4.01 or pH 7.01 buffer can be used.
• For improved accuracy it is recommended to calibrate in two buffers. It is important
to use buffers that bracket the expected value of the sample to be tested. For
example, if the expected value is pH 8, the meter should be calibrated using
pH 7.01 and pH 10.01 buffers.
Battery Replacement
The meter features a low battery indicator. When the battery is running low (under
10%), the battery indicator will blink on the LCD. When the battery is discharged
“
dEAd bAtt
” will be displayed on the LCD for 2 seconds and the meter will turn off.
To change the CR2032 Li-ion battery, turn the battery cover located on the back of
the meter counterclockwise to unlock. Remove cover and replace with new battery
+ side facing up.
Note: Batteries should only be replaced in a safe area using the battery
type specified in this instruction manual. Old batteries should be disposed in
accordance with local regulations.
07
07
• Inorganic
Soak in Hanna Instruments HI7074
Inorganic Cleaning Solution for 15 minutes.
• Oil and grease
Rinse with Hanna Instruments HI7077
Oil and grease Cleaning Solution
IMPORTANT: After performing any of the cleaning procedures rinse the electrode
thoroughly with distilled water, and soak the electrode in HI70300 Storage Solution
for at least 1 hour before taking measurements.
• Removal of films, dirt or deposits on the membrane/junction:
• General
Soak in Hanna Instruments HI7061
General Cleaning Solution for approximately 1 hour.
• Protein
Soak in Hanna Instruments HI7073
Protein Cleaning Solution for 15 minutes.
• If the electrode or junction is dirty soak the tip in HI7061 cleaning solution for
30 minutes, rinse thoroughly in distilled water and then follow cleaning procedure.
Two-point calibration
Proceed with steps 1 through 3 under single-point calibration using pH 7.01 buffer
first. Then follow steps below:
• The “pH 4.01 USE“ message is then displayed.
• Place the electrode in the second calibration buffer (pH 4.01 or 10.01). When the
second buffer is accepted, the LCD will display “Stor” for 1 second and the meter
will return to the normal measurement mode.
• The “CAL“ tag will be displayed in measurement mode with the calibrated buffers.
• If the buffer is not recognized or the slope is out of accepted range “---- Err“
is displayed. Change the buffer, clean the electrode or press any key to exit
calibration.
It is always recommended to carry out a two-point calibration for better accuracy.
Clear calibration
Press CAL button. Meter enters in calibration mode.
Press ON/OFF button and CLR is displayed. The meter will now be at default calibration.
The “CAL“ tag will be cleared in measurement mode, indicating the missing calibration,
until a new calibration will be performed.
Error messages
• During user calibration, if the reading is out of the accepted range, the meter will
displayed “---- Err“.
• pH 14.0 or 0.0 blinking means the limit of the measured value is out of range.
Verify that the electrode is in solution.
• If the measured temperature is higher than 50.0 ºC or lower than 0.0 ºC, the
50.0 ºC or 0.0
°
C message is displayed blinking.
• If the buffer is not recognised “----Err“ is displayed. Check the buffer, clean the
electrode or press CAL button to exit calibration.
• In case of erroneous readings even after an accurate conditioning and calibration,
the reference junction might be contaminated or clogged. Pull out 2 mm (1/8’’) of
the cloth junction to renew the electrode reference (it is recommended to cut the
cloth leaving always at least 2 mm - (1/8’’) over the reference compartment) and
recalibrate the meter. The cloth junction can be pulled out approximately 20 times.
After that, the electrode will have to be replaced.
pHep
