Hanna Instruments HI 98170 User Manual

Instruction Manual

HI 98170 HI 98171

HI 98172

Calibration Check

Waterproof

pH/mV/ISE/Temperature

Meters

www.hannainst.com

1

Dear Customer,
Thank you for choosing a Hanna Instruments product.
Please read this instruction manual carefully before using the instruments.
This manual will provide you with the necessary information for correct use of

the instruments, as well as a precise idea of their versatility.
If you need additional technical information, do not hesitate to e-mail us at

[e-mail] or turn to the back cover for our worldwide contact list.
These instruments are in compliance with directives.

WARRANTY

HI 98170, HI 98171 and HI 98172 are guaranteed for two years against
defects in workmanship and materials when used for their intended purpose and
maintained according to instructions. Electrodes and probes are guaranteed for
six months. This warranty is limited to repair or replacement free of charge.

Damage due to accidents, misuse, tampering or lack of prescribed maintenance
is 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 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 Instruments, first obtain a Returned Goods Authori­zation number from the Technical Service department and then send it with
shipping costs prepaid. When shipping any instrument, make sure it is
properly packed for complete protection.

TABLE OF CONTENTS

WARRANTY .................................................................................................................... 2

PRELIMINARY EXAMINATION .......................................................................................... 3

GENERAL DESCRIPTION .................................................................................................. 3

FUNCTIONAL DESCRIPTION ............................................................................................. 5

HI 98170 AND HI 98171 SPECIFICATIONS ....................................................................... 7

HI 98172 SPECIFICATIONS ............................................................................................. 8

OPERATIONAL GUIDE ...................................................................................................... 9

pH CALIBRATION .......................................................................................................... 12

pH BUFFER TEMPERATURE DEPENDENCE ..................................................................... 17

RELATIVE mV CALIBRATION ........................................................................................... 18

ISE CALIBRATION .......................................................................................................... 19

GOOD LABORATORY PRACTICE (GLP) .............................................................................. 22

SETUP ......................................................................................................................... 25

LOGGING ...................................................................................................................... 27

AutoEnd ...................................................................................................................... 29

TEMPERATURE CALIBRATION (for technical personnel only) ........................................... 30

mV CALIBRATION (for technical personnel only) ............................................................ 31

PC INTERFACE .............................................................................................................. 32

BATTERIES RECHARGING/REPLACEMENT ........................................................................ 37

LCD MESSAGE GUIDE .................................................................................................... 39

TEMPERATURE CORRELATION FOR pH SENSITIVE GLASS ................................................ 40

ELECTRODE CONDITIONING & MAINTENANCE ................................................................ 41

TROUBLESHOOTING GUIDE ........................................................................................... 44

ACCESSORIES .............................................................................................................. 45

2

PRELIMINARY EXAMINATION

Remove the instrument from the packing material and examine it carefully to
make sure that no damage has occurred during shipping. If there is any
damage, notify your Dealer or the nearest Hanna Customer Service Center.

Each instrument is supplied with:

• HI 1230B Combination double-junction, gel pH Electrode

• HI 7662 stainless steel Temperature Probe with 1 m (3.3') Cable

• pH 4.01 & 7.01 Buffer Solutions (20 mL each)

• 100 mL Plastic Beaker

• 4 x 1.2V AA, 1300 mAh Rechargeable Batteries

• HI 710041 Inductive Recharger

• Instruction Manual

• Rugged carrying case

Note: Save all packing material until you are sure that the instrument

functions correctly. All defective items must be returned in the original
packing with the supplied accessories.

GENERAL DESCRIPTION

HI 98170, HI 98171 and HI 98172 are state-of-the-art, heavy-duty pH
meters, designed to provide laboratory results and accuracy under harsh
industrial conditions.

These instruments are provided with a series of new diagnostic features which
add an entirely new dimension to the measurement of pH, by allowing the
user to dramatically improve the reliability of the measurement:

• 7 memorized buffers (pH 1.68, 4.01, 6.86, 7.01, 9.18, 10.01 and

12.45) for calibration

• pH calibration up to five calibration points

• Custom calibration by entering up to five custom buffers

• Messages on the LCD to make the calibration easy and accurate

• Diagnostic features to alert the user when the electrode needs cleaning

• Outside Calibration Range warning

• Monitoring of the electrode aging

• User-selectable “calibration time out” to remind when a new calibration is
necessary

Hanna Instruments reserves the right to modify the design,

construction and appearance of its products without advance notice.

3

Moreover, they offer an extended temperature range from –20 ºC to 120 ºC
(-4 ºF to 248 ºF), using HI 7662 interchangeable probes.
These instruments can also measure with ORP electrodes, thanks to their
capability to measure mV with a resolution up to 0.1 mV.
HI 98172 can also measure with ISE electrodes on ppm scale. The ion charge
selection capability and the ISE calibration in up to five calibration standard
solutions make this instrument very useful for a large range of concentration
solutions measurements.
Other features include:

• Relative mV measurements

• Log on demand (50 samples on each range - pH, mV, ISE)

• Auto Hold feature, to freeze first stable reading on the LCD

• GLP feature, to view last calibration data for pH, Rel mV or ISE

• PC interface

4

FUNCTIONAL DESCRIPTION

1

2

3

4

15

14

HI 98171

ON / OFF

2nd

Calibration Check

pH/ORP Meter

RANGE SETUP

RCL

13

LIGHT

12

AutoEnd CLRMODECAL GLP

11

LOG CFM

5

6

7

8

109

1) BNC electrode connector.

2) Temperature probe socket.

3) RS232 serial communication connector.

4) Liquid Crystal Display (LCD).

5) RANGE key, to select pH or mV (HI 98171, HI 98172), or ISE (HI 98172).

SETUP key, to enter/exit SETUP mode.

6) ON/OFF key, to turn the instrument ON and OFF.

7) CAL key, to enter/exit calibration mode.

GLP key, to display Good Laboratory Practice information.

8) 2nd key, to select second key function.

9) key, to manually increase temperature or other parameters.

MODE key, to select measurement resolution, 0.1 pH / 0.01 pH (HI

98170), or to toggle between mV and Rel mV (HI 98171, HI 98172).

5

10) key, to manually decrease temperature or other parameters.

RCL key, to enter/exit view logged data mode.

11) LOG key, to store measured data.

CFM key, to confirm different values.

12) AutoEnd key, to freeze first stable reading on the LCD.

CLR key, to clear calibration or logged data.

13) LIGHT key, to toggle display backlighting.

14) Secondary LCD.

15) Primary LCD.

6

HI 98170 AND HI 98171

SPECIFICATIONS

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HI 98172

SPECIFICATIONS

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8

OPERATIONAL GUIDE

INITIAL PREPARATION

The instrument is supplied complete with rechargeable batteries. Remove the
back cover, unwrap the batteries and install them, while paying attention to
the correct polarity. Proceed with a complete charging process (see page 37).

To prepare the instrument for use, connect the pH electrode and the temperature
probe to the BNC and temperature sockets on the top of the instrument. The
temperature probe is used in conjunction with the pH electrode to utilize the
instrument's ATC capability, but it can also be used independently to take
temperature measurements. If the probe is disconnected, temperature can be
set manually with the ARROW keys (see page 10 for details).

Turn the instrument ON by pressing ON/OFF.

ON / OFF

At start-up the display will show all the used segments for a few seconds (or while
the button is held), followed by the percentage indication of the remaining
battery charge, then enters measurement mode.

After measurement switch the instrument off, clean the electrode and store it with
a few drops of HI 70300 storage solution in the protection cap. Place the instrument
in the battery recharger case and start the recharging process (see page 37).

The auto-off feature turns the instrument off after a set period (default 20 min)
with no button pressed to save battery life. To set another period or to disable
this feature, see SETUP menu on page 25.

The auto-off backlight feature turns the backlight off after a set period (default
1 min) with no buttons pressed. To set another period or to disable this
feature, see SETUP menu on page 25.

pH MEASUREMENTS

To take a pH measurement remove the electrode
protective cap and simply submerge the tip of the
electrode (4cm/1½”) and the temperature probe
into the sample to be tested.

If necessary, press RANGE until the display changes
to the pH mode.

Allow for the electrode to adjust and reading to
stabilize (hourglass symbol turns off).

The LCD will show the pH measurement together
with the temperature of the sample.

9

RANGE SETUP

In order to take more accurate pH measurements, make sure that the
instrument is calibrated (see page 12 for details).

It is recommended that the electrode is always kept wet and rinsed thoroughly
with the sample to be measured before use.
The pH reading is directly affected by temperature. In order for the instrument
to measure the pH accurately, temperature must be taken into consideration. If
the sample temperature is different from the temperature at which the pH
electrode was kept, allow a few minutes to reach thermal equilibrium.
To use the instrument's Automatic Temperature Compensation feature, submerge
the temperature probe into the sample as close to the electrode as possible and
wait for a few seconds.

If manual temperature compensation (MTC) is desired, the temperature
probe must be disconnected from the instrument.

The display will show the default temperature of 25 ºC,
the last measured temperature reading, or the last set
temperature, with the “ºC” (or “ºF”) tag blinking.

The “MTC” tag and up & down arrows symbols light up on the LCD to indicate
that the instrument is in MTC mode and the arrow keys can be used to enter
the desired temperature value.

Note: When in MTC the user can press and hold the ARROW keys, and the

instrument will start incrementing / decrementing the temperature value.
The instrument keeps measuring and the display is updated periodically.

ORP MEASUREMENTS (HI 98171 & HI 98172 only)

To perform ORP measurements, connect an optional ORP electrode (see Accessories
section) to the instrument and turn it ON.
If necessary, enter the mV mode by pressing RANGE
until the display changes to mV.
Submerge the ORP electrode tip (4cm/1½”) into the
sample to be tested and wait a few seconds for the
reading to stabilize.
Measurements within the ±699.9 mV range are
displayed with 0.1 mV resolution, while outside this
range the resolution automatically switches to 1 mV.
The “ATC” (or “MTC”) tag is turned off because mV
readings are not temperature compensated.
For accurate ORP measurements, the surface of the electrode must be clean
and smooth. Pretreatment solutions are available to condition the electrode
and improve its response time (see Accessories section, page 45).

RELATIVE mV MEASUREMENTS (HI 98171 & HI 98172 only)

To enter Relative mV mode, press 2nd then MODE
while in mV measurement mode. The relative mV
reading will be displayed on the primary LCD and the
current temperature value on the secondary LCD.

10

The relative mV reading is equal to the difference between the absolute mV input
value and relative mV offset established in the relative mV calibration (see page 18).

ISE MEASUREMENTS (HI 98172 only)

To perform ion concentration measurements, connect an optional ISE electrode
to the instrument and turn it ON.

If necessary, enter the ISE mode by pressing RANGE
until the display changes to ppm.

Submerge the ISE electrode tip (4cm/1½”) into the
sample to be tested and wait a few seconds for the
reading to stabilize.

The ppm reading will be displayed on the primary LCD
and the current temperature value on the secondary LCD.
The “ATC” (or “MTC”) tag is turned off because ppm
readings are not temperature compensated.
In order to take accurate ISE measurements, make sure that the appropriate ion
charge was set in SETUP menu, according to the ion type that is to be measured
and the instrument was calibrated (see ISE CALIBRATION for details, page 19).

Notes: • When the reading is out of range, the display will flash the closest

full-scale value.

• The instrument will display “----” on the primary LCD if it is not
calibrated. Perform at least a one-point calibration if the ion charge
is -1, 1, -2, 2 or a two-point calibration for the “undF” option
selected in SETUP menu in order to take ISE measurements.

• If using the pH electrode while in mV mode, the instrument will
measure the mV generated by the pH electrode.

TEMPERATURE MEASUREMENTS

Connect the HI 7662 temperature probe to the appro­priate socket. Immerse the temperature probe into the
sample and allow the reading on the secondary LCD to
stabilize.

Note: The temperature can be displayed in Celsius degrees (ºC) or in Fahrenheit

degrees (ºF) (see SETUP for details, page 25).

BACKLIGHT FEATURE

The instrument is provided with a Backlight feature,
which can be easily toggled on and off through the
keyboard by pressing LIGHT.

LIGHT

Note: The backlight automatically shuts off after a set period (see SETUP

for details, page 25) with no buttons pressed.

11

pH CALIBRATION

It is recommended to calibrate the instrument frequently, especially if high
accuracy is required.

The pH range should be recalibrated:

• Whenever the pH electrode is replaced.

• At least once a week.

• After testing aggressive chemicals.

• When calibration alarm time out is expired - “CAL DUE” tags blink (if
feature is enabled).

• If “Outside Cal Range” message blinks during pH measurement (the
measurement range is not covered by current calibration).

PROCEDURE

The instrument offers a choice of 7 memorized buffers (1.68, 4.01, 6.86, 7.01,

9.18, 10.01 and 12.45 pH) and also allows the user to enter five more pH

values for calibration, “Custom 1” to “Custom 5”. The set custom buffers are
the buffer values at 25 ºC.
When a custom buffer is selected during calibration, the “Custom” tag is
displayed on the LCD and its value can be changed in a ±1.0 pH window,
around the set value, in accordance with current temperature.
For accurate pH measurements, it is recommended to perform a five-point
calibration. However, at least a two-point calibration is suggested.
The instrument will automatically skip the buffers used during calibration and
the buffers which are in a ±0.2 pH window, around one of the calibrated buffers.

• Pour small quantities of selected buffer solutions into clean beakers. For
accurate calibration use two beakers for each buffer solution, the first one for
rinsing the electrode and the second one for calibration.

• Remove the protective cap and rinse the electrode with some of the buffer
solution to be used for the first calibration point.

FIVE-POINT CALIBRATION

• Immerse the pH electrode and the temperature
probe approximately 4 cm (1½”) into a buffer
solution of your choice (pH 1.68, 4.01, 6.86,

7.01, 9.18, 10.01, 12.45 or a custom buffer)
and stir gently. The temperature probe should
be close to the pH electrode.

• Press CAL. The instrument will display the mea­sured pH on the primary LCD and “7.01” buffer
on the secondary LCD, together with “CAL” and
“Cal Point 1” tags.

• If necessary, press the ARROW keys to select a different buffer value.

12

• The “ ” tag will blink on the LCD until the reading is stable.

• When the reading is stable and close to the
selected buffer, “CFM” tag blinks.

• Press CFM to confirm calibration.

LOG CFM

• The calibrated value is then displayed on the
primary LCD and the secondary LCD will display
the second expected buffer value, together with
“CAL” and “Cal Point 2” tags.

• After the first calibration point is confirmed, immerse the pH electrode and the
temperature probe approximately 4 cm (1½”) into the second buffer solution
and stir gently. The temperature probe should be close to the pH electrode.

• If necessary, press the ARROW keys to select a different buffer value.

• The “ ” tag will blink on the LCD until the reading is stable.

• When the reading is stable and close to the selected buffer, “CFM” tag blinks.

• Press CFM to confirm calibration.

• The calibrated value is then displayed on the
primary LCD and the secondary LCD will display

LOG CFM

the third expected buffer value.

• After the second calibration point is confirmed, immerse the pH electrode
and the temperature probe approximately 4 cm (1½”) into the third
buffer solution and stir gently. The temperature probe should be close to
the pH electrode.

• If necessary, press the ARROW keys to select a different buffer value.

• The “ ” tag will blink on the LCD until the reading is stable.

• When the reading is stable and close to the selected buffer, “CFM” t ag blinks.

• Press CFM to confirm calibration.

• The calibrated value is then displayed on the
primary LCD and the secondary LCD will display

LOG CFM

the fourth expected buffer value.

• After the third calibration point is confirmed, immerse the pH electrode
and the temperature probe approximately 4 cm (1½”) into the fourth
buffer solution and stir gently. The temperature probe should be close to
the pH electrode.

• If necessary, press the ARROW keys to select a different buffer value.

• The “ ” tag will blink on the LCD until the reading is stable.

• When the reading is stable and close to the selected buffer, “CFM” t ag blinks.

• Press CFM to confirm calibration.

• The calibrated value is then displayed on the
primary LCD and the secondary LCD will display

LOG CFM

the fifth expected buffer value.

13

• After the fourth calibration point is confirmed, immerse the pH electrode and the
temperature probe approximately 4 cm (1½”) into the fifth buffer solution and
stir gently. The temperature probe should be close to the pH electrode.

• If necessary, press the ARROW keys to select a different buffer value.

• The “ ” tag will blink on the LCD until the reading is stable.

• When the reading is stable and close to the selected buffer, “CFM” t ag blinks.

• Press CFM to confirm calibration.

• The instrument stores the calibration values and
returns to normal measurement mode.

LOG CFM

FOUR, THREE or TWO-POINT CALIBRATION

• Proceed as described in “FIVE-POINT CALIBRATION” section.

• Press CAL after the appropriate accepted calibration
point. The instruments will return to measurement
mode and will memorize the calibration data.

CAL GLP

ONE-POINT CALIBRATION

Two SETUP selectable options are available for one-point calibration: “Pnt”
and “OFFS”.

If the “Pnt” option is selected, the adjacent slopes will be reevaluated.
If the “OFFS” option is selected, an electrode offset correction is performed

keeping unchanged the existing slopes.

• Proceed as described in “FIVE-POINT CALIBRATION” section.

• Press CAL after the first calibration point was
confirmed. The instruments will memorize the
one-point calibration data and will return to

CAL GLP

measurement mode.

Notes: • Press 2nd then MODE to toggle between pH buffer and temperature

reading during calibration.

• If the value measured by the instrument is not close to the selected
buffer, “WRONG” “ ” and “WRONG” “ ” tags will blink alter­nately. In this case check if the correct buffer has been used, or
regenerate the electrode by following the Cleaning Procedure (see
page 43). If necessary, change the buffer or the electrode.

• If the buffer temperature or the manual temperature exceeds
the temperature limits of the buffer, “WRONG” “ ” tags and
temperature reading will blink.

• If “WRONG” tag and “OLd” message on the secondary LCD are
displayed blinking, an inconsistency between new and previous (old)
calibration is detected. Clear old calibration parameters and proceed
with calibration from the current calibration point. The instrument will
keep all confirmed values during current calibration.

14

• With one-point calibration there is no “Condition” and only the
frame is shown. Calibration time out is active.

• Each time a buffer is confirmed, the new calibration parameters
replace the old calibration parameters of the corresponding buffer.

If current confirmed buffer has no correspondence in the existing
stored calibration and this is not full, the current buffer is added to
the existing stored calibration.

If the existing stored calibration is full (five
calibration points), and after confirming
the calibration point, the instrument will
ask which buffer will be replaced by current
buffer.

Press the ARROW keys to select another buffer to be replaced.
Press CFM to confirm the buffer that will be replaced.
Press CAL to leave replace mode. In this case, the buffer will not
be memorized.

Note: The replaced buffer is not removed from calibration list and it can be

selected for the next calibration points.

WORKING WITH CUSTOM BUFFERS

If at least one custom buffer was set in SETUP menu, it can be selected for
calibration by pressing the ARROW keys. The “CUSTOM” tag will be displayed
blinking on the LCD.

Press 2nd then SETUP if you want to adjust the buffer
value in accordance with current temperature. The
buffer value, displayed on the secondary LCD, will
start blinking.

Use the ARROW keys to change the buffer value.
After about 5 seconds you performed the last change, the buffer value is

updated. Press 2nd then SETUP if you want to change it again.
Notes: • Custom buffer value can be adjusted in a ±1.00 pH window,

around the set value.

• If you want to return to the set custom buffer value, simply press the
ARROW keys (UP then DOWN) to select again the custom buffer.

CLEAR CALIBRATION

Press 2nd then CLR in any moment during calibration.
The “CLr ALL” message will be displayed on the LCD
along with “OLD” tag.

AutoEnd CLR

All old calibrations, starting with current selected buffer are cleared and the
instrument continues calibration.

Note: If CLR is pressed during the first calibration point, the instrument

returns to measurement mode.

15

CONDITION

The display is provided with a 5-dot bargraph (unless the feature is disabled)
which gives an indication of the electrode status after calibration as follows:

Bargraph indication Condition value

All 5 dots steady 81 to 100% of life

4 dots steady 61 to 80%

3 dots steady 41 to 60%

2 dots steady 21 to 40%

1 dot steady 1 to 20%

1 dot blinking 0%

Only frame is ON No info available

The “condition” bargraph remains active until the end of the calibration day.
Note: The electrode condition is evaluated only if current calibration includes

at least two.

CLEAN ELECTRODE

Each time pH calibration is performed, the instrument internally compares the
new calibration with the one previously stored.

When this comparison indicates a significant difference, the “CLEAN” “ ” tags
blink on the LCD to advise the user that the pH electrode may need to be cleaned
(see ELECTRODE CONDITIONING & MAINTENANCE section for details, page 41).

After cleaning, perform a new calibration.
Note: If the calibration data are cleared, the comparison is done with the

default values.

16