Hanna Instruments pHep 98107 User manual

pHep is a rugged pH tester with replaceable
electrode and renewable reference junction. The
instrument can be calibrated at two points by
the user, simply acting on the offset and slope
calibration trimmers.
CONDITIONING:
• Remove the cap.
• To activate the electrode, immerse it in
HI70300 storage solution for 2 hours.
CALIBRATION:
Perform one of the following two-point calibration
procedure, according to the required application:
Acid calibration for measurements below pH 7:
• Immerse the electrode in pH
7.01 (HI7007) buffer solution.
• Allow the reading to stabilize
and with a small screwdriver
turn the pH7 Calibration Trim-
mer until the display shows
"7.0".
• Rinse the electrode with tap water and immerse
it in pH 4.01 (HI7004) buffer solution.
• Allow the reading to stabilize and with a small
screwdriver turn the pH4/pH10 Calibration Trim-
mer until the display shows "4.0".
Alkaline calibration for measurements above pH 7:
• Immerse the electrode in pH 7.01 (HI7007)
buffer solution.
• Allow the reading to stabilize and with a small
screwdriver turn the pH7 Calibration Trimmer
until the display shows "7.0".
• Rinse the electrode with tap water
and immerse it in pH 10.01 (HI7010) buffer
solution.
• Allow the reading to stabilize and with a small
screwdriver turn the pH4/pH10 Calibration Trim-
mer until the display shows "10.0".
OPERATION:
• Remove the protective cap.
• Turn the meter on with the ON/OFF
switch located on the top of the meter.
• Immerse it in the solution to be tested
without exceeding the maximum immer-
sion level.
HI 70300
• Stir gently and wait for the reading to stabilize.
• After use, rinse the electrode with tap water to
minimize contamination.
• Store the electrode with a few
drops of storage (HI70300) or
pH7 (HI7007) solution in the pro-
tective cap.
• Always replace the protective cap after use.
DO NOT USE DISTILLED OR DEIONIZED WATER
FOR STORAGE PURPOSES.
• Large differences in pH readings (±1 pH) could
be due to lack of calibration or dry electrode.
MAINTENANCE:
The sensor should be kept moist at all times. For this
purpose, always keep wet the tissue inside the
protective cap. 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 rec-
ommended to cut the cloth
leaving always at least 2
mm -1/8'' over the reference
compartment) and repeat the
calibration procedure.
The cloth junction can be pulled out approximately
20 times. After that, the electrode can be replaced
(see the Electrode Replacement section).
BATTERY REPLACEMENT:
If calibration can not be performed or the display
fades, batteries level is low and batteries must be
replaced. Slide off the battery compartment cover
and replace all four 1.5V batteries while paying
attention to their polarity.
Batteries should only be replaced in a nonhazardous
area using the battery type specified in this instruction
manual.
pHep®®
®®
®
HI 98107
Pocket-sized pH Meter
Manufacturers since 1978

Visit our Internet Home Page:
http://www.hannainst.com
SPECIFICATIONS:
RANGE 0.0 to 14.0 pH
RESOLUTION 0.1 pH
ACCURACY (@20°C/68°F) ±0.1 pH
TYPICAL EMC DEVIATION ±0.1 pH
ENVIRONMENT 0 to 50C
(32 to 122F); 95% RH
CALIBRATIONCALIBRATION
CALIBRATIONCALIBRATION
CALIBRATION Manual, at two points through
offset and slope trimmers
BATTERY TYPE 4 x 1.5V alkaline (included)
BATTERY LIFE approx. 1700 hours
of continuous use
DIMENSIONS 175 x 41 x 23 mm
(7.9 x 1.8 x 1")
WEIGHT 78 g (2.7 oz.)
ACCESSORIES:
HI 73106 Spare electrode
HI 77400P pH 4.01 & 7.01 calibration kit
(5 x 20 mL, each)
HI 77700P pH 7.01 calibration kit
(10 x 20 mL)
HI 770710P pH 7.01 & 10.01 calibration kit
(5 x 20 mL, each)
HI 7004M pH 4.01 buffer solution
(230 mL bottle)
HI 7007M pH 7.01 buffer solution
(230 mL bottle)
HI 7010M pH 10.01 buffer solution
(230 mL bottle)
HI 70300M Storage solution (230mL)
HI 7061M Electrode cleaning solution
(230mL bottle)
HI 731326 Calibration screwdriver (20 pcs)
IS98107-R3 09/01
ELECTRODE REPLACEMENT:
The electrode can be easily replaced in the following
way:
• Slide off the battery cover.
• Remove the screw on the back of the pHeppHep
pHeppHep
pHep
located below the battery compartment and slide
off the whole internal part of the tester.
• To remove the electrode proceed as follows:
Remove the fastening screw on the front (1) to
loose the electrode. The internal circuit is con-
nected to the electrode through two wires (one
for the glass sensor and one for the reference).
Remove the two small screws (2 & 3) which
fasten the two connecting wires to their sock-
ets.
• Remove the electrode and
replace it with a new
HI73106.
• Connect the new electrode
as follows:
first fasten the screw on the
front (1) to attach the elec-
trode to the circuit. Insert
the two small wires into
their sockets and fasten the
two screws (2 & 3).
• The new electrode is supplied with four new O-
rings (4). Make sure they are placed properly
(as shown on the above drawing) before
reinserting the circuit into the plastic casing.
• Reinsert the internal circuit with the new
electrode into the plastic casing.
• Fasten the screw on the back below the
battery compartment.
Internal circuit and electrode:
• Reinsert the battery compartment cover.
• Perform a new calibration before using the
pHeppHep
pHeppHep
pHep again.
pHep®®
®®
®
HI 98107
Pocket-sized pH Meter
HI73106
ONE YEAR WARRANTY & SERVICEABLE:ONE YEAR WARRANTY & SERVICEABLE:
ONE YEAR WARRANTY & SERVICEABLE:ONE YEAR WARRANTY & SERVICEABLE:
ONE YEAR WARRANTY & SERVICEABLE:
Covered by one yearone year
one yearone year
one year warranty against defects in work-
manship and materials, this tester is now completely
serviceable. Contact your dealer for further information.
The pHeppHep
pHeppHep
pHep is in compliance with the CE directives EN
50082-1, EN 50081-1 and EN 61010-1.
pHeppHep
pHeppHep
pHep®®
®®
®is a registered Trademark of "Hanna Instruments"