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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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

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.

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.

LCD DISPLAY FUNCTIONAL DESCRIPTION

mV pH DATE

CFM WRONG CAL

BUF

1. Primary Display

2. Secondary Display

1 2 3

°C mV pH

FUNCTIONAL DESCRIPTION OF

HI 9624 & HI 96240

°C

HI 9624 MICROCOMPUTER pH METER

CAL CFMCFM

HI 96240 MICROCOMPUTER pH METER

ON / OFFON / OFF

ALTALT

CAL

RANGERANGE TIMETIME CAL DATACAL DATA

°C

1212 1111 1010

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

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")

FUNCTIONAL DESCRIPTION OF

HI 9625 & HI 96250

°C

HI 9625 MICROCOMPUTER pH METER

CAL CFMCFM

HI 96250 MICROCOMPUTER pH METER

ON / OFFON / OFF

ALTALT

CAL

RANGERANGE TIMETIME CAL DATACAL DATA

°C

1212 1111 1010

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

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

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")

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

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

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

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.

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.

°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).

°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

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)

CAL

CAL DATA

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.

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

calibration buffer value (BUF2)

CAL

BUF

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

CAL DATA

calibration buffer value (BUF3).

CAL

BUF

Press the CAL DATA key again to resume to normal operation.

°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.

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