Hanna Instruments HI 9321 User Manual

Instruction Manual

HI 9321 HI 931400 HI 931401

Microprocessor-based

Bench pH/mV/°C Meters

ins

rum

lib

tio

CAL

Start calibration

Select buffer1 value

CFM

Confirm when ready

Select buffer2 value

CFM

Confirm when ready

I 9

COM

For RS232 configuration

RANGE

Select pH or ORP measurement

tio

For storing display result

Recall previous stored data

www.hannainst.com

These Instruments are in

Compliance with the CE Directives

Dear Customer, Thank you for choosing a Hanna Product. It is recommended that you

read this instruction manual carefully before using the instrument. This manual will provide you with the necessary information for the correct use of the instrument, as well as a precise idea of its versatility. If you need more technical information, do not hesitate to e-mail us at tech@hannainst.com.

This instrument is in compliance with the CSA, UL and Directives.

TABLE OF CONTENTS

PRELIMINARY EXAM. & GENERAL DESCRIPTION ............................. 3

FUNCTIONAL DESCRIPTION ..........................................................4

SPECIFICATIONS...........................................................................6

FUNCTIONAL DESCRIPTION OF LCD .............................................. 8

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

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

pH VALUES AT VARIOUS TEMPERATURES................................... 16

TAKING REDOX MEASUREMENTS................................................. 16

TEMPERATURE AND mV CALIBRATION ......................................... 17

INTERFACE WITH PC ...................................................................17

TROUBLESHOOTING GUIDE ........................................................18

ELECTRODE CONDITIONING & MAINTENANCE...............................19

TEMPERATURE CORRELATION FOR pH......................................... 22

ADDITIONAL CALIBRATION PROCEDURES AND INFORMATION ...... 24

ACCESSORIES ............................................................................. 27

WARRANTY ................................................................................ 34

CE DECLARATION OF CONFORMITY.............................................. 35

PRELIMINARY EXAMINATION

Remove the instrument from the packing material and examine it 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 meter comes supplied complete with:

• HI 1131B glass-body combination pH Electrode with 1 m (3.3') cable

• HI 7669/2W Temperature Probe

• HI 76405 Electrode Holder

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

• HI 7071 Electrolyte Solution

• 12VDC Transformer (HI 710005 or HI 710006)

• Dust cover

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

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

GENERAL DESCRIPTION

The Hanna Instruments HI 9321, HI 931400 and HI 931401 are microprocessor-based bench meters for pH, mV (ORP and ISE) and temperature measurements.

pH measurements are compensated for the temperature effect manually or automatically with the HI 7669/2W temperature probe.

The meter comes equipped with a large LCD which shows the pH (or mV) and temperature simultaneously together with graphic symbols.

Through the RS 232C serial port you can transfer sample measurements to a PC (HI 931400 and HI 931401).

FUNCTIONAL DESCRIPTION HI 9321

pH calibration procedure

°C1

CAL Start calibration

/ Select buffer1 value

CFM Confirm when ready

/ Select buffer2 value

CFM Confirm when ready

HI 9321 MICROPROCESSOR pH METER

CAL

CFM

ins rum n

MEM

CAL

NOT READY

CON WRONG

BUF

23 4 56 7 8

1. Liquid Crystal Display

2. CAL enters and exits calibration mode

3. CFM confirms calibration values

↑↑

↑°C and

↑↑

↓↓

↓°C manually set temperature and select pH

↓↓

buffer values

5. MR recalls the stored value

6. MEM stores a value in memory

7. RANGE selects measurement range

8. ON/OFF turns meter on and off

Function

RANGE

Select pH or ORP measurement

MEM

For storing display result

Recall previous stored data

MEM

°C

ON/OFF

RANGE

I. BNC Socket

II. Reference Electrode Socket III. Reference Electrode Socket IV. Temperature Probe Socket

V. Reset Button

VI. VDC Power Socket (for HI 710005 or HI 710006)

FUNCTIONAL DESCRIPTION

HI 931400 & HI 931401

°C1

pH calibration procedure

HI 931401 MICROPROCESSOR pH METER

ins rum n

MEM

CAL

NOT READY CFM WRONG

BUF

2345 678

1. Liquid Crystal Display

2. MEM stores a value in memory

3. MR recalls the stored value

4. CAL enters or exits calibration mode

5. CFM confirms calibration values

6. RANGE selects measurement range

7. COMM sets baud rate

↑↑

↓↓

↑°C and

↓°C manually set temperature and select pH

↑↑

↓↓

buffer values

9. ON turns meter on

10. OFF turns meter off

CAL Start calibration

/ Select buffer1 value

CFM Confirm when ready

/ Select buffer2 value

CFM Confirm when ready

°CMEM

°C

CAL

COMM

RANGE

CFM

Function

MEM For storing display result

MR Recall previous stored data

COMM For RS232 configuration

RANGE Select pH or ORP measurement

OFF

I. BNC Socket

II. Reference Electrode Socket

III. Reference Electrode Socket

IV. Temperature Probe Socket

V. Reset Button

VI. VDC Power Socket (for HI 710005 or HI 710006)

VII. RS 232C Socket

SPECIFICATIONS HI 9321

& HI 931400

Range pH 0.00 to 14.00

Resolution pH 0.01

Accuracy pH ±0.01

(@20°C/68°F) ISE ±0.2 mV

Typical EMC pH ±0.02

Deviation ISE ±0.5 mV

pH Calibration Automatic 1 or 2 points with 5 memorized buffers

Temperature Automatic or manual

Compensation from 0 to 100°C (32 to 212°F)

Electrode HI 1131B glass-body combination

Temperature probe HI 7669/2W (included)

Input impedance 1012 Ω

Computer Interface opto-isolated RS 232C (HI 931400 only)

Power supply 12 VDC (CSA, UL & CE approved) (included)

Environment 0 to 50°C (32 to 122°F)

Dimensions 230x170x70 mm (9.1x6.7x2.7")

Weight 1.3 kg (2.9 lb.); kit with holder: 3.2 kg (7 lb.)

ISE ±399.9 mV

ORP ±1999 mV

°C 0.0 to 100.0

ISE 0.1 mV

ORP 1 mV

°C 0.1

ORP ±1mV

°C ±0.5

ORP ±1 mV

°C ±2

(4.01, 6.86, 7.01, 9.18, 10.01)

refillable pH electrode (included)

max. 95% RH non-condensing

SPECIFICATIONS HI 931401

Range pH 0.00 to 14.00 / 0.000 to 14.000

Resolution pH 0.01 / 0.001

Accuracy pH ±0.002 & ±0.01

(@20°C/68°F) mV ±0.05% F.S.

Typical EMC pH ±0.01

Deviation mV ±0.6

pH Calibration Automatic 1 or 2 points with 5 memorized buffers

Temperature From 0 to 100°C (32 to 212°F) manual or

Compensation automatic with HI 7669/2W probe (included)

Electrode HI 1131B glass-body combination

Temperature probe HI 7669/2W (included)

Input impedance 1012 Ω

Computer Interface Opto-isolated RS 232C (included)

Power supply 12 VDC (CSA, UL & CE approved) (included)

Environment 0 to 50°C (32 to 122°F)

Dimensions 230x170x70 mm (9.1x6.7x2.7")

Weight 1.3 kg (2.9 lb.); kit with holder: 3.2 kg (7 lb.)

mV ±999.9 (ISE & ORP)

°C 0.0 to 100.0

mV 0.1

°C 0.1

°C ±0.5

(4.01, 6.86, 7.01, 9.18, 10.01)

refillable pH electrode (included)

max. 95% RH non-condensing

Primary Display

FUNCTIONAL DESCRIPTION OF

HI 9231 & HI 931400 LCD

MEM

CAL

NOT READY

CON WRONG LOW BAT

Secondary Display

FUNCTIONAL DESCRIPTION OF

HI 931401 LCD

BUF

°C1

OPERATIONAL GUIDE

ELECTRODE AND PROBE CONNECTIONS

For combination pH or ORP electrodes (with internal reference) plug the electrode's BNC to the socket on the back of the meter (pages 45, # I).

For electrodes with a separate reference, connect the measuring electrode's BNC to the BNC socket (pages 4-5, # I) and the reference electrode plug to the other socket (pages 4-5, # II or III).

For temperature measurements and automatic temperature compensation connect the temperature probe to the appropriate socket (pages 4-5, # IV).

POWER CONNECTION

Plug the 12VDC transformer (HI 710005 or HI 710006) into the DC socket (pages 4-5, # VI). Plug the transformer to the mains.

Note: Make sure the main line is protected by a fuse. HI 931400 and HI 931401 use an EEPROM to retain the pH, mV

and temperature calibrations as well as the serial communication setting. The instrument will retain the data after a calibration or serial communication setting, even when it is unplugged.

pH MEASUREMENTS

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

Turn the instrument on. The meter automatically defaults to the pH

measurement mode. Allow a couple of minutes for the electrode to

stabilize. pH is displayed on the primary display and

temperature on the secondary one.

(1½

4 cm

°C

In order to take accurate pH measurements, make sure that the instrument has been calibrated before use (see page 12).

For more accurate results, it is recommended that the electrode is rinsed thoroughly with a liberal amount of the sample to be measured.

The pH reading is directly affected by temperature. In order for the meter to measure the pH accurately, temperature must be taken into consideration. A perfect equilibrium between the pH electrode and the sample can take up to 15 minutes.

To use the Automatic Temperature Compensation feature, sub- merge the HI 7669/2W temperature probe into the sample as close to the electrode as possible and wait for a couple of minutes.

If the temperature of the sample is known or tests are always performed at the same temperature you can simply manually compensate for it. For this purpose the temperature probe must be disconnected.

The display will then show the default temperature of 25°C or the last recorded temperature reading with the "°C" symbol

blinking.

Note the temperature of the sample using a ChecktempC or an accurate reference thermometer.

°C

The temperature can now be adjusted with

↑↑

↑°C and

↑↑

↓↓

↓°C keys.

↓↓

the

°C

If the temperature probe is connected to the meter, the secondary LCD will display the measured temperature and the "°C" indicator will not blink. In this case, pressing

↓↓

↓°C will not alter the temperature reading.

↓↓

↑↑

↑°C or

↑↑

If measurements are taken in different samples successively, it is recommended that the electrode (and the temperature probe) be rinsed thoroughly with deionized, distilled or in the absence of both, tap water and then blot dry between each measurement.

°C

ORP MEASUREMENTS

Press RANGE.

Submerge the ORP or ISE electrode tip (4cm/ 1½") into the sample.

(1½ ")

4 cm

Allow a few minutes for the reading to stabilize.

If readings are out of range "---" will appear on the LCD.

See also "Taking REDOX Measurements" on page 16.

TEMPERATURE MEASUREMENTS

Taking a temperature measurement is very easy. Connect the HI 7669/2W temperature probe and turn the instrument ON.

Dip the liquid/general purpose HI 7669/2W probe into the sample and allow the reading on the secondary display to stabilize.

HOLD FUNCTION

Press and hold MEM. The last reading will be frozen on the display until MEM is released. During this operation, the MEM indicator is also shown on the LCD.

MEM

°C

ºC

°C

Press MR and the previously memorized reading will be displayed with the MEM indicator on the LCD.

MEM

°C

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