User Guide

Checker Checker Checker Checker
®®®®
OPERATION:
• Do not be alarmed if white crys-
tals 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.
• Switch the
Checker
®
on.
• Remove the protective cap and
immerse the tip of the elec-
trode (bottom 4cm/1½") into
your sample.
• Stir gently and wait until the
display stabilizes.
• For best results, recalibrate pe-
riodically.
• NEVER IMMERSE THE ELEC-
TRODE UP TO THE CONNEC-
TOR. ALWAYS KEEP THE CON-
NECTOR CLEAN AND DRY.
• After use, rinse the electrode
with water to minimize contam-
ination.
• Store the electrode
with a few drops of
HI 70300 Storage
Solution in the protec-
tive cap.
• DO NOT USE DISTILLED OR
DEIONIZED WATER FOR
STORAGE PURPOSES.
• Always replace the protective
cap after use.
Calibration Manual two points
Electrode: combination stick pH
electrode
Checker
®
1: HI 1270 (included)
Checker
®
2: HI 1207 (included)
Checker
®
3: HI 1208 (included)
Environment 0 to 50ºC (32 to 122ºF);
95% RH max.
Battery Type 2 x 1.4V alkaline
Life approx. 3,000 hours
of continuous use
Dimensions 66 x 50 x 25 mm
(2.6 x 2 x 1")
Weight (meter) 70 g (2.5 oz.)
INITIAL PREPARATION:
The pH electrode is shipped dry.
Prior to using the Checker
®
, re-
move the protective cap and con-
dition 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.
SPECIFICATIONS:
Range 0.00 to 14.00 pH
Resolution 0.01 pH
Accuracy ±0.2 pH
(@20°C/68°F)
Typical EMC ±0.1 pH
Deviation
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
pH
HI 70300