P.O. Box 1318 Gresham Or. 97030 USA
1-800-669-2113 Fax 1-503-663-1147
info@greenair.com www.greenair.com
Range
pH
0.0 to 14.0 pH
Temperature
0.0 to 60.0 °C or 32.0 to 140.0 °F
Resolution
pH
0.1 pH
Temperature
0.1 °C or 0.1 °F
Accuracy (@ 20°C/68°F)
pH
±0.1 pH
Temperature
±0.5 °C or ±1 °F
Typical EMC Deviation
pH
±0.02 pH
Temperature
±0.5 °C or ±1 °F
Calibration
1 or 2 points with 2 sets of memorized buffers:
(pH 4.01, 7.01 & 10.01 or 4.01, 8.68 & 9.18)
Temperature Compensation
Automatic
Battery Type / Life
4 x 1.5V / 350 hours
Environment
0 to 50°C (32 to 122°F); R.H. 100%
Dimensions
163 x 40 x 26 mm (6.4 x 1.6 x 1.0")
Weight
85 g (3 oz.)
Specifications:
Genesis Instruments is a trademark of Green Air Products Inc.
www.greenair.com
POCKET METER
pH-TEMP
for pH meter GI 98127
Specifications
Remove the electrode by rotating it counterclockwise and then
pull out. Insert the new electrode by following the above
instruction in reverse.
Model GI-98127
Pocket Pen
The pH electrode can be easily removed with the tool provided.
Insert the tool into the electrode cavity as shown below.
Electrode Replacement
Instruction and
Operation Manual
Genesis Instruments
Introduction
How to Operate
General Description
Familiarizing yourself with your new meter
GI-98127 is a watertight pH and temperature tester. The housing
has been designed to float. All pH readings are automatically
temperature compensated (ATC), and temperature values can
be displayed in °C or °F units. The meters can be calibrated at
one or two points with auto-buffer recognition and against five
memorized buffer values. Measurements are highly accurate
with a unique stability indicator right on the LCD. A low battery
symbol warms the user when the batteries are to be replaced.
In addition, the Battery Error Prevention System (BEPS) avoids
erroneous reading caused by low voltage level by turning the
meter off. The pH electrode, supplied with the meters, is
interchangeable and can be easily replaced by the user. The
stainless steel encapsulated temperature sensor facilitates
faster and more accurate temperature-measurement and
compensation.
A. Turning your meter “on”
To turn on your meter, press and hold the O/MODE button for
2-3 seconds. Notice that every time you turn the pen on, it will
flash all icons used on the LCD for a few seconds. This is
immediately followed by the percentage of remaining battery
life – example: % 95 BATT). After the battery life flashes, the
pen will settle into “normal measurement mode”.
B. To turn your meter “off”
Make sure the pen is in normal measurement mode, then press
and hold the O/MODE button. The LCD will read ‘OFF”.
Immediately release the O/MODE button, your meter will now
be off.
C. Freezing the display
Warranty
Genesis Instruments are warranted for one (1) 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. Damages
due to accident, misuse, tampering or lack of prescribed
maintenance are not covered. If service is required, contact
the dealer from whom you purchased the instrument. If under
warranty, report the model number, date of purchase, serial
number and the nature of the failure. If the repair is not covered
by the warranty, you will be notified of the charges incurred.
When shipping any instrument, make sure it is properly
packaged for complete protection.
Press the Set/Hold button for 2-3 seconds until the secondary
display reads ‘HOLD”. Pressing either button will return you to
normal measurement mode.
NOTE: Before taking a measurement, follow the calibration
instructions to ensure accurate readings. For accuracy it is
recommended to carry out a two point calibration. For best
results always use Genesis Instrument buffers and calibration
solutions. If measurements are taken in different samples
successively, rinse the electrode thoroughly to eliminate crosscontamination and after cleaning, rinse the electrode with some
of the sample to be measured. When not in use, rinse the
electrode with water and store in a few drops of storage solution.
Do not use distilled water. If electrode dries out soak in storage
solution for one hour. Clean monthly in cleaning solution.
Calibrating pH
A. Make sure that the meter is powered on. Now press and
hold the O/Mode button until CAL appears on the secondary
display. Immediately release the button when you see the “CAL”
icon. The LCD will now read 7.01 in the primary display and
USE in the secondary display. Notice the CAL icon will be
flashing in the lower left corner of the LCD this indicates that
your meter is currently calibrating. Fully submerge the electrode
(located at the bottom of the pen) in Genesis pH 7.01 buffer
solution. The meter will automatically recognize the buffer and
calibrate to it. After recognition of the 7.01, the meter will prompt
you to use 4.01. At this time you may opt out and use a single
point calibration of 7.01 or continue to perform a two-point
calibration. To opt out and use a single point calibration of 7.01,
simply press the O/MODE button.
B. To proceed with a two-point calibration
Rinse the electrode with pure water to avoid crosscontamination. Ten submerge electrode into pH 4.01 buffer
solution. After recognition of the 4.01, OK will flash for 1 second
on the LCD, (watch the LCD closely or you may miss the OK),
then the meter will return to normal measurement mode. At
this time, you may notice that the CAL icon (bottom left of LCD)
that was flashing before, now remains solid. This denotes that
the calibration process has been completed.
NOTE:
For hydroponics and growing applications, we recommend pH
7.01. For people who have a need for NIST 6.86 buffer, follow
instructions as follows:
With meter on and in pH measurement option, press and hold
the O/MODE button again to show current buffer set, which will
be pH 7.01, to switch to pH 6.86 use the Set/Hold button to
toggle between the two. Press the O/MODE button to return to
normal measurement mode.
For more information on this product and other Green Air
Products equipment and controls, see our web site at
www.greenair.com
Taking Measurements & Changing Temperature Units
Feature Descriptions
A. To Take a Measurement
1. Indicates Automatic Temperature Compensation (ATC)
2. Stability Indicator (meter is calculating reading)
3. Percentage of battery life display icon
4. Calibration is complete icon (flashes during calibration)
5. Low Battery Indicator (shows replacement is necessary)
6. Measurement Mode Indicator
7. Primary Reading Display
8. Temperature Scale Icon
9. Secondary Display
Submerge the electrode directly into the solution or sample to
be tested while stirring gently. For sample testing use plastic,
paper, or styrofoam to hold the solution to avoid electromagnetic
interference. Measurement is complete when the stability
indicator disappears. The measurements are automatically
temperature compensated by ATC software within the meter.
B. To Select °C or °F to Read Temperature
With meter on and in any measurement option, press and hold
O/Mode button until LCD reads TEMP then release the button.
Now use the Set/hold button to toggle between °C and °F. To
return to normal measurement mode, press the O/Mode button
twice.
Battery Replacement: The meter displays the remaining
battery percentage every time it is switched on. When the battery
level is below 5%, the battery symbol on the bottom left of the
LCD lights up to indicate a low battery condition. The batteries
must be immediately replaced. If however the battery level is
so low as to cause erroneous reading, the Battery Error
Prevention System (BEPS) will automatically turn the meter
off.
6
To change the batteries, remove the 4 screws located on the
top of the meter. Once the top has been removed, carefully
replace the 4 batteries located in the compartment while paying
attention to their polarity. Replace the top, making sure that the
gasket is properly seated in place, and tighten the screws. DO
NOT OVERTIGHTEN THE BATTERY COVER!!!
1. Battery Compartment
2. LCD Display
3. ON/Off/MODE Button
4. pH Electrode
5. Temperature Sensor
6. SET/HOLD Button
Always look for the
molecule to be assured of quality
and a genuine Green Air Product