CORNING 440 pH Meter User Manual

1
109118-1 Rev. A,10/96
Instruction Manual
This manual contains complete instructions for setting up and using
the 440 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 440 is intended for
use by persons knowledgeable in safe laboratory practices. If the 440
is not used in accordance with these instructions for use, the
protection provided by the equipment may be impaired.
The 440 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 440 or power supply unit.
Do not remove the covers.
440 pH Meter

CORNING 440 pH Meter Specifications

General

pH Range	0.00 to 14.00 pH
Resolution	0.01 pH
Accuracy	±0.01 pH
mV Range	±1999 mV
Display	LCD
Temperature Compensation	Automatic or manual, 0 to 100 °C
Calibration	Up to 3 points
Electrode	Combination electrode
Power Supply	AC Adapter

Summary

Set Up

Unpacking and Installation

Instructions for unpacking the meter and its accessories, including the electrode arm attachment.

Input and Output Connections

Details on connecting electrodes, ATC probes, and the power supply unit to the meter.

Display and Controls

Overview of the meter's display elements, indicators, and physical controls.

Operation

Calibrating a pH Electrode

Step-by-step guide for performing 1-point and 2-point pH electrode calibration.

Measuring Samples

Procedure for taking pH measurements using the electrode and sample.

Automatic Endpoint (Auto Read)

Explanation and activation of the auto endpoint feature for stable readings.

Changing the Calibration Buffer Settings

How to configure the meter for different calibration buffer values.

mV Measurements

How to perform millivolt measurements for electrode slope determination.

Temperature Measurements

How to measure temperature using an ATC probe for compensation.

Changing the Resolution

Adjusting the decimal place resolution for pH readings.

Chart Recorder

Details on using the REC socket for chart recorder output.

Interfacing via the RS232 Output

Connecting the meter to computers via RS232 for data transmission.

Support Information

Basic Theory

Explains the principles of pH measurement and the Nernst equation.

Operating Hints

Provides tips and best practices for accurate pH measurements.

Meter Maintenance

Instructions for cleaning and maintaining the pH meter unit.

Electrode Maintenance

Guidelines for cleaning, storing, and reconditioning the pH electrode.

Problem Solving

General overview of troubleshooting common issues with the meter and electrode.

Meter Test and Reset

Procedure to test and reset the meter's internal memory.

Meter Error Codes

Explains error codes displayed by the meter and their meanings.

Electrode Problem Solving

Troubleshooting steps for issues related to electrode performance.

Specifications

Lists technical specifications, operating conditions, and dimensions.