Hanna Instruments HI 9624 User Manual
Instruction Manual
HI9624 - HI 9625
HI 96240 - HI 96250
Portable Waterproof
GLP
pH/°C Meters
with Calibration Data Storage
This instrument is in Compliance with the CE Directives
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WWW.HANNAINST.COM
1
Dear Customer,
Thank you for choosing a Hanna Instruments
Product.
Please read this instruction manual carefully
before using the instrument.
This manual will provide you with all the
necessary information for the correct use of
the instrument, as well as a precise idea of its
versatility in a wide range of applications.
These instruments are in compliance with the
directives.
TABLE OF CONTENTS
General Description ..................................... 3
Preliminary Examination ............................. 3
LCD Display Functional Description ............ 5
Functional Description HI 9624 & HI96240 ... 6
Specifications HI 9624 & HI 96240 ............... 7
Functional Description HI 9625 & HI 96250... 8
Specifications HI 9625 & HI 96250 ............... 9
Operational Guide ..................................... 10
pH Calibration ........................................... 21
pH Values at Various Temperature ............. 27
Temperature and mV Calibration ................ 28
RS232C Output (HI96240 & HI96250) ....... 29
Electrode Conditioning and Maintenance ... 32
Battery Replacement ................................ 36
Troubleshooting Guide ............................... 38
Temperature-Resistance Correlation for
HANNA pH Sensitive Glass....................... 39
Accessories .............................................. 41
Electrode Application Reference Guide ..... 49
Warranty ................................................... 50
CE Declaration of Conformity .................... 51
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 noticeable damage is found, notify
your Dealer.
Each pH meter is supplied complete with:
• HI1230B Combination pH Electrode
• HI7669/2W Temperature Probe
• 1.5V AA size Alkaline Batteries (4 pcs)
• pH4, pH7 buffer and cleaning solutions
(20 mL each)
• 12VDC power adapter
• Rugged Carrying Case.
The kit versions HI96240 and HI96250 include
also:
• HI92000 Windows
®
compatible software
• HI920011 PC connection cable
• HI3230B platinum, gel, plastic body
ORP electrode (HI96250KIT only)
Note: Save all packing material until you are
sure that the instrument functions correctly. All defective items must be returned in the original packaging together
with the supplied accessories.
GENERAL DESCRIPTION
Microprocessor-based, HI9624, HI9625,
HI96240 and HI96250 are portable waterproof
pH/°C meters which meet
GLP GLP
GLP
(Good Labo-
GLP GLP
ratory Practice) requirements.
The last calibration data is automatically stored
in memory and you can check the date and
time of the last performed calibration, including the offset and 2 slope values, at any time
by simply pressing one button. The possibility of checking the status of your meter guarantees maximum measurement precision.
3
With HI9625 and HI96250 you can also measure ORP (Oxidation Reduction Potential) or
Ion Specific (ISE). mV measurements automatically switch from 0.1 to 1 mV resolution
when the reading reaches 400 mV.
All pH measurements are automatically compensated for temperature changes (ATC) when
used with the supplied temperature probe.
It is possible to connect the HI96240 and
HI96250 to a PC through the RS232C serial
port for monitoring data via computer.
Other features include:
• automatic pH calibration (1, 2 or 3 points)
• 5 memorized pH buffers: pH 4.01
6.86
7.01
9.18
10.01
• dual level display with graphic symbols,
including defective electrode indication
• 24 hr clock with date and time.
• 12VDC socket for external power supply
• low battery detection.
Made of tough, lightweight ABS material, the
water-resistant rugged casing are built to last.
These heavy-duty pH meters comply with the
IP67 standards: dust-tight, they are protected
against the effects of temporary immersion in
water and are designed to provide laboratory
results and accuracy under harsh industrial
conditions.
4
LCD DISPLAY FUNCTIONAL DESCRIPTION
mV pH DATE
1
CFM
WRONG
CAL
BUF
1. Primary Display
2. Secondary Display
1
2
3
°C mV pH
2
5
FUNCTIONAL DESCRIPTION OF
HI 9624 & HI 96240
11
2
pH
°C
HI 9624
MICROCOMPUTER
pH METER
CAL CFMCFM
33
2
55
66
77
88
HI 96240
MICROCOMPUTER
pH METER
ON / OFFON / OFF
ALTALT
CAL
RANGERANGE TIMETIME CAL DATACAL DATA
pH
°C
4
1212
1111
1010
99
1. BNC socket for pH Electrode
2. RCA Socket for Temperature Probe
3. Socket for External Power Supply
4. Socket for RS232C connection cable (for
HI 96240 only)
5. Liquid Crystal Display
6. ON/OFF key, to turn the meter on or off
7. ALT, alternate function key
8. RANGE key, to select pH measurement
mode
9. CAL DATA key, to display last calibration data: date and time, offset and 2
slope values
10. TIME key, to display date and time
11. CFMÐ key, to confirm the calibration reading and DOWN arrow key to scroll down
12. CALÏ key, to enter or exit calibration
mode and UP arrow key to scroll up
6
SPECIFICATIONS OF HI 9624 & HI 96240
HI 9624 HI 96240
Range pH 0.00 to 14.00
Resolution pH 0.01
Accuracy pH +0.01
(@20°C/68°F) °C +0.5
Typical EMC pH +0.01
Deviation °C +0.5
Calibration Automatic 1, 2 or 3 points
Offset Calibration +1 pH
Slope Calibration from 80 to 110%
Temperature Automatic or manual
Compensation from 0 to 100°C
Electrode HI1230B combination pH
Temp. Probe HI7669/2W with 1 m
Input Impedance 1012 Ohm
Power Supply 4x1.5V AA size batteries
RS232C Not Isolated
Operating from 0 to 50°C
Conditions (32 to 122°F)
Dimensions 196 x 80 x 60 mm
Weight 500 g (18 oz.) meter alone
°C 0.0 to 100.0
°C 0.1
with pH 4.01, 6.86, 7.01,
9.18 and 10 .01
buffers memorized
(32 to 212°F)
gel electrode (included)
(3.3') cable (included)
150 hours of con-
tinuous use; power
socket for 12VDC adapter
Available
95% RH max
(7.7 x 3.1 x 2.4")
7
FUNCTIONAL DESCRIPTION OF
HI 9625 & HI 96250
11
2
pH
°C
HI 9625
MICROCOMPUTER
pH METER
CAL CFMCFM
33
2
55
66
77
88
HI 96250
MICROCOMPUTER
pH METER
ON / OFFON / OFF
ALTALT
CAL
RANGERANGE TIMETIME CAL DATACAL DATA
pH
°C
4
1212
1111
1010
99
1. BNC socket for pH or ORP or ISE Electrode
2. RCA Socket for Temperature Probe
3. Socket for External Power Supply
4. Socket for RS232C connection cable (for
HI 96250 only)
5. Liquid Crystal Display
6. ON/OFF key, to turn the meter on or off
7. ALT, alternate function key
8. RANGE key, to select pH or mV measurement mode
9. CAL DATA key, to display last calibration data: date and time, offset and 2
slope values
10. TIME key, to display date and time
11. CFMÐ key, to confirm the calibration reading and DOWN arrow key to scroll down
12. CALÏ key, to enter or exit calibration
mode and UP arrow key to scroll up
8
SPECIFICATIONS OF HI 9625 & HI 96250
HI 9625 HI 96250
Range pH 0.00 to 14.00
Resolution pH 0.01
Accuracy pH +0.01
(@20°C/68°F) ISE (mV) ±0.2
Typical EMC pH +0.01
Deviation mV ±1
Calibration Automatic 1, 2 or 3 points
Offset Calibration +1 pH
Slope Calibration from 80 to 110%
Temperature Automatic or manual
Compensation from 0 to 100°C
Electrode HI1230B combination pH
Temp. Probe HI7669/2W with 1 m
Input Impedance 1012 Ohm
Power Supply 4x1.5V AA size batteries
RS232C Not Isolated
Operating from 0 to 50°C
Conditions (32 to 122°F)
Dimensions 196 x 80 x 60 mm
Weight 500 g (18 oz.) meter alone
ISE (mV) ±399.9
ORP (mV) ±1999
°C 0.0 to 100.0
ISE (mV) 0.1
ORP (mV) 1
°C 0.1
ORP (mV) ±1
°C +0.5
°C +0.5
with pH 4.01, 6.86, 7.01,
9.18 and 10 .01
buffers memorized
(32 to 212°F)
gel electrode (included)
(3.3') cable (included)
150 hours of con-
tinuous use; power
socket for 12VDC adapter
Available
95% RH max
(7.7 x 3.1 x 2.4")
9
OPERATIONAL GUIDE
INITIAL PREPARATION
Each meter is supplied complete with batteries.
Remove the back cover, unwrap
the batteries and install them
while paying attention to the polarity.
PROBES CONNECTION
To prepare the instrument for use connect
the pH electrode to the BNC socket on the
top of the instrument.
Connect the temperature probe to the RCA
socket.
COMBINATION
pH ELECTRODE
WITH BNC
CONNECTOR
HI 7669/2W
TEMPERATURE
PROBE
The temperature probe can be used independently to take temperature measurements, or
it can be used in conjunction with the pH
electrode to utilize the meter's ATC capability. If the probe is disconnected, temperature
can also be set manually with the UP and
DOWN arrow keys.
CAL
CFM
10
To switch the instruments
on, press and hold the
ON/OFF key.
The meter has a built-in pro-
ON/OFF
tection against electromagnetic interference and the delayed response
of the keys assures that the commands are
not mistaken for stray signals.
Before proceeding with pH measurements follow the calibration procedure (see page 19).
SETTING DATE AND TIME
Press the ALT and the TIME keys simultaneously. The display will show the date setting. At the bottom of the display the year will
be blinking.
ALT
TIME
DATE
Use the UP or the DOWN arrow keys to
select the year.
CAL
CFM
When the correct year is selected, press the
TIME key once. The month will start blinking.
DATE
TIME
11
Select the month by using the UP or the
DOWN arrow keys.
CAL
CFM
Press the TIME key. The day will start blinking.
DATE
TIME
Use the UP or the DOWN arrow key to
select the correct day.
CAL
CFM
Press the ALT and the TIME keys simultaneously. The display will now show the clock
time and the hour will start blinking.
ALT
TIME
To select the hour, press the UP or the
DOWN arrow keys (24 hour clock).
CAL
CFM
12
Press the TIME key once and the minutes
will start blinking.
TIME
Use the UP or the DOWN arrow keys to
select the minutes.
CAL
CFM
Press the ALT and the TIME keys simultaneously to leave this mode.
ALT
TIME
The date and time are now set and stored in
the memory even when the meter is switched
off.
13
VIEWING DATE / TIME / pH / mV** /
TEMPERATURE
Press the RANGE key to display the pH
measurement mode: the pH reading is on the
primary display, and the temperature is on
the secondary one.
pH
°C
RANGE
Press the RANGE key again (for HI 9625 and
HI 96250 only) to display mV measurements
together with the temperature (by pressing
the same key you can switch from pH and
mV measurement mode and vice-versa).
mV
°C
RANGE
To view the time press the TIME key and the
display will show hour and minutes.
TIME
To view the date, press the TIME key again.
The display will show month and day on the
primary display and year on the secondary
one.
DATE
TIME
**mV for HI9625 and HI96250 only
14
TO VIEW pH CALIBRATION DATA
Press the CAL DATA key and the meter will
display the last calibration data, in the following sequence:
- CAL indicator with month, day and year
DATE
CAL
CAL DATA
Press the CAL DATA key again and the
meter will display the last calibration time as:
- CAL indicator with hour and minutes.
CAL
CAL DATA
Press the CAL DATA key again, the display
will show the offset calibration factor as:
- CAL indicator with pH offset value
- pH offset calibration buffer value (BUF1)
pH
CAL
CAL DATA
pH
1
BUF
Note: The offset pH value should be between
±0.50pH.
For values higher than +0.50 pH or
lower than -0.50 pH the electrode is no
longer reliable and should be replaced.
15
Press the CAL DATA key again, the display
will show the first slope calibration factor as:
- CAL indicator with pH slope 1st value
- pH slope 1
st
calibration buffer value (BUF2)
CAL
pH
BUF
2
CAL DATA
Press the CAL DATA key again to display
the second slope calibration factor as:
- CAL indicator with pH slope 2nd value
- pH slope 2
nd
CAL DATA
calibration buffer value (BUF3).
CAL
pH
BUF
3
Press the CAL DATA key again to resume to
normal operation.
pH
°C
CAL DATA
Note: The slope characteristic of the pH elec-
trode is directly displayed in percentage of the theoretical value of 58.17mV
per pH unit at 20°C.
16
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