Hanna Instruments HI 98103 User Manual
®®®®
Checker Checker Checker Checker
Checker® 1: with HI 1270 screw-type pH
electrode
Checker® 2: with HI 1207 screw-type pH
electrode
Checker® 3: with HI 1208 BNC-type elec-
trode
SPECIFICATIONS:
Range
Resolution
Accuracy
(@20°C/68°F)
Typical EMC
Deviation
0.00 to 14.00 pH
0.01 pH
±0.2 pH
±0.1 pH
Calibration
Electrode:
Checker® 1: HI 1270 (included)
Checker® 2: HI 1207 (included)
Checker® 3: HI 1208 (included)
Environment
Battery Type
Life
Dimensions
Weight (meter)
Manual two points
combination stick pH
electrode
0 to 50ºC (32 to 122ºF);
95% RH max.
2 x 1.4V alkaline
approx. 3,000 hours
of continuous use
66 x 50 x 25 mm
(2.6 x 2 x 1")
70 g (2.5 oz.)
INITIAL PREPARATION:
The pH electrode is shipped dry.
Prior to using the Checker®, remove the protective cap and condition the electrode by soaking
the tip (bottom 4 cm/1½") in
pH 7.01 buffer solution for a
couple of hours. Then follow the
calibration procedure below.
OPERATION:
• Do not be alarmed if white crystals appear around the cap. This
is normal with pH electrodes
and they dissolve when rinsed
with water.
• If the electrode is dry, soak it in
tap water for a few minutes,
prior to use.
• Connect the electrode to the
meter.
pH
• Switch the
Checker
®
on.
• Remove the protective cap and
immerse the tip of the electrode (bottom 4cm/1½") into
your sample.
• Stir gently and wait until the
display stabilizes.
• For best results, recalibrate periodically.
• NEVER IMMERSE THE ELECTRODE UP TO THE CONNECTOR. ALWAYS KEEP THE CONNECTOR CLEAN AND DRY.
• After use, rinse the electrode
with water to minimize contamination.
• Store the electrode
with a few drops of
HI70300 Storage
Solution
in the protec-
tive cap.
• DO NOT USE DISTILLED OR
DEIONIZED WATER FOR
STORAGE PURPOSES.
• Always replace the protective
cap after use.
HI 70300
®®®®
Checker Checker Checker Checker
CALIBRATION:
• Dip the tip of the electrode (bottom 4cm/1½")
in a sample of pH 7.01
buffer at room temperature. Allow the reading to stabilize.
• Use a small screwdriver to adjust the pH 7
trimmer until the display reads "7.01".
• Rinse the electrode
with water and dip it in
a sample of pH 4.01
(or 10.01) buffer solution. Allow the reading
to stabilize.
• With a small screwdriver adjust the pH 4/10
trimmer until the display reads the chosen
buffer value.
HI 7007
HI 7004
• Calibration is now complete.
ALWAYS USE FRESH
BUFFERS FOR CALIBRATION
BATTERY REPLACEMENT:
Replace the batteries when the
display fades, or Checker
®
cannot
be switched on.
Remove the battery
cover on the back
of the meter. Insert
2 new 1.4V batteries while paying attention to their polarity.
Batteries should only be replaced
in a safe area using the battery
type specified in this instruction
manual.
ACCESSORIES:
HI 1207 Combination pH
electrode 12 mm diameter with screwtype connector
HI 1208 Combination pH
electrode 12 mm diameter with BNC
connector
HI 1270 Combination pH
electrode, 9 mm diameter with screwtype connector
HI 70300M Storage solution
(230 mL)
HI 76504/P2 2x1.4V alkaline batter-
ies
Choose from the following
20 mL sachet solutions:
HI 70000P Electrode cleaning/
rinse solution (25 pcs.)
HI 70004P pH 4 buffer solution
(25 pcs.)
HI 70007P pH 7 buffer solution
(25 pcs.)
HI 70010P pH 10 buffer solution
(25 pcs)
SUGGESTIONS FOR USERS:
Before using this product, make sure that it is entirely
suitable for the environment in which it is used.
Operation of this instrument in residential areas could
cause interference to radio and TV equipment. The
glass bulb at the end of the pH electrode is sensitive
to electrostatic discharges. Avoid touching this glass
bulb at all times. During operation of instrument, ESD
wrist straps should be worn to avoid possible damage
to the pH electrode by electrostatic discharges. Any
variation introduced by the user to the supplied
equipment may degrade the instrument's EMC
performance. To avoid electrical shocks, do not use
this instrument when voltage at the measurement
surface exceeds 24 VAC or 60 VDC. To avoid damage
or burns, do not perform any measurement in
microwave ovens.
®
Checker
is a registered Trademark of "Hanna Instruments"
Visit our Internet Home Page:
http://www.hannainst.com
ISTRCHKR 02/97
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