Dear Customer,
Thank you for choosing a Hanna Instruments product.
Please read this instruction manual carefully before using
the tester. For more information about Hanna Instruments
and our products, visit www.hannainst.com or e-mail us at
[email protected].
For technical support, contact your local Hanna Instruments Office
or e-mail us at [email protected].
Preliminary Examination
Remove the tester and accessories from the packing material and
examine it carefully. If you require any further information, please contact
Hanna Instruments technical support team at [email protected].
Each
HI98121
is delivered in a cardboard box and is supplied with:
•
HI70004
pH 4.01 buffer solution, 20 mL sachet (1 pc.)
•
HI70007
pH 7.01 buffer solution, 20 mL sachet (1 pc.)
•
HI70300N
Storage solution for pH & ORP electrodes, 20 mL sachet (1 pc.)
•
HI70022
470 mV ORP test solution, 20 mL sachet (2 pcs.)
•
HI700601
pH & ORP electrode cleaning solution, 20 mL sachet (1 pc.)
•
HI73127
pH electrode
•
HI73128
Electrode removal tool
• 1.5V batteries (4 pcs.)
• Instrument quality certificate
• Instruction manual
Note:
Save all packing material until you are sure that the tester
works correctly. Any damaged or defective item must be returned
in its original packing material with the supplied accessories.
General Description & Intended Use
HI98121
is a compact pH, ORP and temperature tester. It features a two-
buttons operation system and is easy to use. The compact and waterproof
casing is designed to float if accidentally dropped in water. The tester
measures temperature in both °C and in °F. All pH measurements are
temperature compensated automatically (ATC). The tester displays a
stability ( ) tag that will disappear once the reading has stabilized.
Battery level and low-battery indicator are clearly displayed on
the LCD to alert the user in the event that low battery power could
adversely affect readings.
BEPS (Battery Error Prevention System) Tester will automatically shut
off if there is not enough power to get an accurate measurement.
pH Probe:
HI98121
is supplied together with
HI73127
pH replaceable
electrode with a stainless steel round connector and extendable cloth
junction. This design has no pins to line up or that can break.
Temperature Sensor:
The built-in, stainless steel temperature
sensor facilitates faster and more accurate temperature measurement.
Specifications
Range
-2.00 to 16.00 pH
±1000 mV
-5.0 to 60.0 °C / 23.0 to 140.0 °F
Resolution
0.01 pH
1 mV
0.1 °C (0.1 °F)
Accuracy
(@25 °C /77 °F)
±0.05 pH
±2 mV
±0.5 °C (±1.0 °F)
Temperature
compensation
Automatic for pH readings
Calibration
pH: automatic, one or two-point with two
sets of standard buffers (pH 4.01 / 7.01 /
10.01 or pH 4.01 / 6.86 / 9.18)
ORP: factory calibrated
Electrode
HI73127
pH electrode (included)
Environment
-5 to 50 °C (23 to 122 °F); RH 100%
Battery type
1.5V (4 pcs.)
Battery life
Approx. 250 hours
Auto-off
After 8 minutes of non-use
Dimensions
171 x 41 x 26 mm (6.7 x 1.6 x 1.0”)
Weight
83 g (2.9 oz)
Functional Description
Liquid Crystal
Display
SET/HOLD
button
Battery
compartment
/MODE
button
ORP electrode
Temperature
sensor
HI73127
pH electrode
LCD Display
1
2
3
4
6
7
5
1. Automatic Temperature Compensation (ATC) indicator
2. Stability tag
3. Battery life percentage indicator
4. Low battery indicator
5. Measurement unit
6. First LCD line
7. Second LCD line
Operational Guide
Turning the Tester ON / OFF
Press and hold /MODE. All LCD segments will be displayed for a
few seconds followed by battery life percentage indicator. To turn
the tester off, from measurement mode, press /MODE. “OFF”
will be displayed on the second LCD line and then the tester will
turn off.
HOLD Mode
From measurement mode, press and hold SET/HOLD until “HOLD” is
displayed. pH or ORP readings will be frozen on the LCD. Press either
buttons to resume measurement mode.
Setup
Setup mode allows the selection of temperature unit and pH buffer
set. To enter the setup mode, select pH mode and press /MODE
until “TEMP” and the current temperature unit are displayed (e.g.
“TEMP °C”). Then:
• Press SET/HOLD to select temperature unit. After the temperature
unit has been selected, press /MODE to select the pH buffer set.
To return to measurement mode, press /MODE twice.
• After setting the temperature unit, the tester will display the
current buffer set: “pH7.01 BUFF” (for pH 4.01/7.01/10.01)
or “pH6.86 BUFF” (for NIST pH 4.01/6.86/9.18). Press SET/
HOLD to change the buffer set and press /MODE to resume
measurement mode.
Calibration & Measurement
It is recommended to calibrate the tester frequently, especially if high
accuracy is required. More frequent calibrations may be required
depending on the type of sample being tested. The tester should be
recalibrated:
• whenever the pH electrode is replaced
• at least once a month
• after testing aggressive samples
pH Calibration Procedure
From measurement mode, press and hold /MODE until “CAL” is
displayed. The tester enters calibration mode and displays “pH 7.01
USE” or “pH 6.86 USE”, if NIST buffer was selected. Buffer value
will be displayed on the first LCD line and “REC” message will be
displayed on the second line. If used buffer was not valid, “USE”
message will be displayed for 12 seconds and replaced by “WRNG”,
indicating measured sample is not valid.
• For one-point calibration using pH 4.01, 10.01 or 9.18 buffer
solution, once the reading has stabilized, the tester automatically
accepts the calibration point. Accepted buffer point and “OK 1”
message are displayed, and then the tester returns to measurement
mode.
• For one-point calibration using pH 7.01 (or 6.86) buffer solution,
press /MODE after calibration point has been accepted. The
tester will display “pH 7.01” (or “pH 6.86”) and “OK 1”, and
then return to measurement mode.
• For a two-point calibration using pH 7.01 (or pH 6.86) buffer
solution, after the first calibration point has been accepted, “pH
4.01 USE” will be displayed for 12 seconds (unless a valid buffer
is recognized).
• If valid buffer solution is recognized (pH 4.01, 10.01 or 9.18),
the calibration point is accepted and the accepted value and “OK
2” are displayed. The tester then returns to measurement mode.
• If no valid buffer solution is recognized, “WRNG” message is
displayed.
Note:
When the calibration procedure is completed, the “CAL”
tag is turned on.
Exiting Calibration
• When in calibration mode, it is possible to exit calibration
procedure by pressing /MODE, before first-point calibration
has been accepted. The tester displays “ESC” and returns to
measurement mode and last calibrated data.
• When in calibration mode, it is possible to clear a previous
calibration and return to default values by pressing SET/HOLD,
before the first calibration point has been accepted. The tester
displays “CLR” on the second LCD line, “CAL” tag dissappears and
tester returns to default calibration.
