Care and Maintenance Auto-off Battery Replacement

INSTRUCTION MANUAL
To obtain the highest accuracy for measurements
From measurement mode,
it is important to follow these tips:
press and hold the ON/OFF
• Calibration is only as good as the buffer being used. The pH button. The meter will cycle
buffer values change over time once the sachets are opened. through “OFF,” “CAL,” then
Fresh buffer should be used for each calibration. current auto-off setting.

The default setting is 8

HI98100
• The probe should be rinsed with purified water each time
before placing in buffer or sample to be tested. minutes (“d08”). Press ON/
OFF button to change. “d60”
• When the meter is not in use it is important to add several is auto-off after 60 minutes,


drops of storage solution to the protective cap to keep the
probe hydrated. If storage solution is not available, pH 4 or pH 7
and “d--” disables the auto-off
feature. Press and hold the
pH Tester
buffer can be used. button to exit the menu.

• For improved accuracy it is recommended to calibrate to a

minimum of two points. It is important to use buffers that

Clear Calibration
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 and pH 10 buffers.
To change the CR2032 Li-ion battery, turn the battery
• It is important to calibrate and measure samples at the cover located on the back of the meter counterclockwise to
same temperature. A dramatic change in temperature unlock. Remove cover and replace with + side facing up.
between buffer solutions and samples to be tested will
Place meter in calibration
give inaccurate readings.
mode. Press and hold ON/OFF Note: Batteries should only be replaced in a safe area using the
until “CLr” is displayed. The battery type specified in this instruction manual. Old batteries
meter will now be at default should be disposed in accordance with local regulations.

Warranty
calibration. No tags will be
shown in measurement mode

The meter is warranted for a period of one year against defects

until calibration is performed.
Accessories
in workmanship and materials when used for their intended
purpose and maintained according to instructions. The electrode Electrode
is warranted for a period of six months. This warranty is
limited to repair or replacement free of charge. Damage due to Code Description

“Err” Message
accidents, misuse, tampering or lack of prescribed maintenance
is not covered. If service is required, contact your local Hanna HI1271 pH electrode for Checker Plus
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
In calibration mode, if the meter pH Buffer Solution
displays an “Err” message
Instruments, first obtain a Returned Goods Authorization (RGA) Code Description
when in the correct fresh
number from the Technical Service department and then send
buffer solution then the probe
it with shipping costs prepaid. When shipping any instrument, HI70004P pH 4.01 buffer solution, 20 mL sachets (25)
should be cleaned. Place
make sure it is properly packaged for complete protection.
the probe in the HI700601 HI70007P pH 7.01 buffer solution, 20 mL sachets (25)
cleaning solution for 15
minutes. Rinse with purified HI70010P pH 10.01 buffer solution, 20 mL sachets (25)

Recommendations
water and place in storage
pH 4.01 & 7.01 buffer solution, 20 mL sachets
solution for 1 hour before HI77400P
(10 pcs., 5 ea.)
calibrating. If the “Err” message
for Users persists then the HI1271
probe should be replaced. HI770710P
pH 10.01 & 7.01 buffer solution, 20 mL sachets
(10 pcs., 5 ea.)

Before using Hanna products, make sure that they are entirely

Battery Indicator
suitable for your specific application and for the environment in
which they are used. Operation of these instruments may cause Electrode Cleaning Solution
unacceptable interferences to other electronic equipment, thus
requiring the operator to take all necessary steps to correct such Code Description
interferences. Any variation introduced by the user to the supplied
equipment may degrade the instrument’s EMC performance. general purpose cleaning solution,
HI700601P
To avoid damages or burns, do not put the instrument in 20 mL sachets (25)
The Checker®Plus features a
microwave oven. For yours and the instrument safety do not low battery indicator. When
use or store the instrument in hazardous environments. the battery is running low, the
tag will blink on screen. When Electrode Storage Solution
the battery has been depleted,
All rights are reserved. Reproduction in whole or in part is “Erb” will appear on screen Code Description
prohibited without the written consent of the copyright owner, and the meter will turn off.
Hanna Instruments Inc., Woonsocket, Rhode Island, 02895, USA. HI70300L electrode storage solution, 500 mL bottle

HI70300M electrode storage solution, 230 mL bottle

ISTHI98100 1.1 07/15
 Operation Meter Calibration
Thank You
A
For one or two-point calibration
Thank you for choosing a Hanna Instruments product.
using pH 7 buffer go to procedure A
Please read this instruction manual carefully before using Press the ON/OFF button to
the instrument. turn the meter on. All tags will
be displayed.

B
For more information about Hanna and our products, visit
www.hannainst.com. For one-point calibration using pH 4
The meter will go into
or pH 10 buffer go to procedure B
measurement mode: current
For technical support, contact your local Hanna office or
reading and calibrated buffers
email us at tech@hannainst.com
are displayed.
Find your local Hanna office on www.hannainst.com From measurement mode, When “7.01” blinks on the display,
press and hold the ON/OFF place the tip of the probe into a
button until “CAL” is displayed. pH 4, 7, or 10 buffer solution.

Meter Overview
Preparation: A One or Two-Point Calibration with pH 7
The pH electrode is shipped dry. Before using the Checker®Plus,
remove the protective cap and condition the electrode by soaking
Liquid
the tip (bottom 4 cm (1.5”)) in pH 7.01 buffer solution for several

One-Point
Crystal
hours. Then follow the calibration procedure.
Display
• Do not be alarmed if white crystals appear around the cap.
This is normal with pH electrodes and they dissolve when
rinsed with water.

• Connect the electrode to the meter.

ON/OFF
• Turn the Checker®Plus on by pressing ON/OFF button. Button
pH 4 will then blink Press the button to exit Meter will exit to measurement
If pH 7 buffer solution is
• Remove the protective cap and immerse the tip of the on the display. and save calibration. “Sto” mode and the calibration
used as the first point the
electrode in the sample to be tested. will then be displayed. tag will be displayed.
buffer is recognized with the
• Stir gently and wait for a stable reading. blinking stability indicator.

NEVER IMMERSE THE ELECTRODE OVER THE MAXIMUM When the reading is stable,

Two-Point
IMMERSION LEVEL. THE CONNECTOR MUST ALWAYS BE the stability indicator will
CLEAN AND DRY. disappear and pH 7 will be
calibrated. If pH 7 is the only
• After use, rinse the electrode with water and store it with a calibration point, finish
few drops of HI70300 storage solution in the protective cap. Maximum one-point procedure at right.
Immersion
• Replace protective cap after each use. If using pH 4 or pH 10 as
Level
a second point, continue
DO NOT USE DISTILLED OR DEIONIZED WATER FOR two-point procedure at right. Use pH 4 or 10 to perform When the reading is stable, the Meter will exit to measurement
STORAGE PURPOSES.
a two-point calibration. stability indicator will disappear. mode and the calibration
The value is automatically “Sto” will be displayed when tags will be displayed.
recognized and displayed with the calibration is saved.
Specifications pH Probe
the blinking stability indicator.

Range

Resolution
0.00 to 14.00 pH

0.01 pH B One-Point Calibration with pH 4 or pH 10

Accuracy
±0.2 pH
(@25°C/77°F)

Calibration automatic, one or two-point

Electrode HI1271 (included)

Battery Type CR2032 Li-ion

Recommended
Battery Life approximately 1000 hours of continuous use
Immersion
Auto-off 8 minutes, 60 minutes, or can be disabled Level 4 cm (1.5”)

Environment 0 to 50°C (32 to 122°F); RH 95% max If pH 4 or 10 buffer solution When the reading is stable, the Meter will exit to measurement
is used as the first point stability indicator will disappear. mode and the calibration tag
Dimensions 50 x 174 x 21 mm (2 x 6.8 x 0.9“) the value of the buffer is “Sto” will be displayed when will be displayed.
recognized and displayed with the calibration is saved.
Weight 50 g (1.8 oz.)
the blinking stability indicator.