Corning 430 Instruction Manual

430 pH Meter

Instruction Manual

This manual contains complete instructions for setting up and using
the 430 pH meter. Applications information is also available.

The information contained in this manual was correct at the time of
going to print. However, we continue to improve products and reserve
the right to change specifications, equipment and maintenance
procedures at any time.

This manual is copyrighted, and all rights are reserved. No part of
this manual may be reproduced by any means or in any form without
prior consent in writing.

The power supply unit is classed as IEC Class II equipment
(equipment providing an adequate degree of protection against
electric shocks, in which additional safety precautions, for example,
double or reinforced insulation, are included). The 430 is intended for
use by persons knowledgeable in safe laboratory practices. If the 430
is not used in accordance with these instructions for use, the
protection provided by the equipment may be impaired.

The 430 is suitable for direct current only.
This equipment generates, uses and can radiate radio frequency

energy and if not installed and used in accordance with the
instruction manual, may cause interference with radio
communications. It has been tested and found to comply with the
limits for a Class A computing device pursuant to Subpart J of Part
15 of FCC Rules, which are designed to provide reasonable protection
against such interference when operated in a commercial
environment. Operation of this equipment in a residential area is
likely to cause interference in which case the user at his own expense
will be required to take whatever measures may be required to
correct the interference.

There are no user replaceable parts in the 430 or power supply unit.
Do not remove the covers.

109117-1 Rev. A, 10/96

1

Contents

1 Set Up

1.1 Unpacking and Installation ................................................ 3

1.2 Input and Output Connections........................................... 4

1.3 Display and Controls ......................................................... 4

2 Operation

2.1 Calibrating a pH Electrode ................................................ 6

2.2 Measuring Samples........................................................... 7

2.3 Meter Reset and Buffer Sets ............................................. 7

2.4 mV Measurements ............................................................ 8

2.5 Temperature Measurements ............................................. 8

2.6 Chart Recorder .................................................................. 9

3 Support Information

3.1 Basic Theory.................................................................... 10

3.2 Operating Hints................................................................ 11

3.3 Maintenance .................................................................... 12

3.3.1 Meter Maintenance.......................................................... 12

3.3.2 Electrode Maintenance.................................................... 12

3.4 Problem Solving .............................................................. 14

3.4.1 Meter Reset ..................................................................... 14

3.4.2 Meter Test ....................................................................... 14

3.4.3 Meter Error Codes ........................................................... 15

3.4.4 Electrode Problem Solving .............................................. 16

3.5 Specifications .................................................................. 18

Consumables and Accessories ............................... inside rear cover

Warranty .................................................................. inside rear cover

2

109117-1 Rev. A, 10/96

1.1 Unpacking and Installation

1. The main carton will contain the following:
Meter with a shorting (test) clip in the pH socket

Power Supply
This Instruction Manual
Memo Cards, English, French, German, Italian,
Spanish
Warranty Card
Calibration Certificate

2. If you ordered the meter with an electrode, electrode arm

and accessories, the top tray of the main carton will
contain these items. Refer to the accessories packing sheet
for a list of the additional components.

3. To attach the electrode arm to the pH meter:

a. The electrode arm can be attached to the left or right-

hand side. Using the screwdriver supplied remove the
appropriate end cap from the pH meter.

b. Slide the arm base into the recess and tighten the fixing

screw. Replace the end cap.

c. Fit the electrode arm onto the post. Adjust the tension

screw as required.

1

electrode arm

arm base

tension screw

fixing screw

4. Fill in and return the warranty card. For your own record

make a note of the serial number, date of purchase and
supplier on the inside front cover of this manual.

109117-1 Rev. A, 10/96

end cap

screwdriver

3

1.2 Input and Output Connections

1

DC - power

supply unit
socket

REC - recorder output
socket, see Section 2.6
for details

1. Disconnect the shorting clip from the pH socket and retain

it by clipping it over the socket. Connect the electrode. If
you are using an electrode incorporating ATC connect the
other lead to the ATC socket.

NOTE The 430 will not accept separate reference and pH

electrodes.

2. If you are using a separate ATC probe connect it to the

ATC socket.

3. Connect the power supply unit to the DC socket.

ATC - ATC (automatic
temperature compensation)
probe socket

pH - combination
electrode socket

1.3 Display and Controls

4

109117-1 Rev. A, 10/96

1.3 Display and Controls (cont)

mode

cal

on/off

read

430 Display

mode

slope value
displayed

pH trend
indicator

Selects pH, mV or temperature mode.

Starts a calibration sequence in pH mode.

Turns the display off, and places the meter in standby
mode. Wakes meter up.

Starts sample measurement in all modes. Press again to
freeze display at endpoint.

1

calibration buffer
indicator

automatic
temperature
compensation

Example: pH Reading, with ATC

109117-1 Rev. A, 10/96

5

2.1 Calibrating a pH Electrode

1 point calibration

Place the tip of the electrode in the calibration buffer and

2

press It does not matter which buffer you do first.

The meter will automatically endpoint when the reading is stable
and the appropriate buffer symbol will appear on the display.

Rinse the tip of the electrode with distilled or deionized water and
goto Measuring Samples (Section 2.2) or 2 point calibration.

NOTE If you are using an ATC probe (or an electrode

2 point calibration

Place the tip of the electrode in the second buffer and press

The meter will automatically endpoint when the reading is stable
and the appropriate buffer symbol will appear on the display. The
meter will also briefly display the electrode slope value.

Rinse the tip of the electrode with distilled or deionized water and
goto Measuring Samples (Section 2.2).

cal

incorporating ATC), temperature is being measured and
the buffer value is being corrected for temperature (see
Section 2.5). If you are not using an ATC in the system,
the Model 430 assumes a temperature of 25°C.

cal

NOTE For maximum accuracy, we recommend using an ATC

probe or the 3-in-1 Combination electrode which includes
an ATC probe. If you do not have an ATC probe you
should make sure that all buffers and samples are at
25°C.

6

109117-1 Rev. A, 10/96

2.2 Measuring Samples

NOTE Good laboratory practice dictates that electrodes should

be calibrated at least daily.

Place the tip of the electrode in the sample and press
to start the measurement. The decimal point will be
flashing whenever the electrode is reading.

When the reading is stable, press to freeze the display.

NOTE The display of the Model 430 will show both a digital

and an analog pH reading.

2.3 Meter Reset and Buffer Sets

This process resets the meter electronics and places the selected
buffer set in the meter memory. When calibrating you can use
any two of the three buffers in the selected set.

Buffer Set 1 (b=1): 4.00, 7.00, 10.01 pH
Buffer Set 2 (b=2): 4.01, 7.00, 9.21 pH
Buffer Set 3 (b=3): 4.01, 6.86, 9.18 pH

To reset the meter and buffer set:

Turn the meter off

on/off

read

read

2

Press and hold and turn meter on

Release key.

The display will show b=1, b=2, or b=3.

Press until display shows the buffer set you want.

Press and the meter will reset and put the selected buffer

109117-1 Rev. A, 10/96

mode

cal

read

mode

set into the meter memory.

on/off

7