Fisher Scientific accumet BASIC AB 15 User manual

1

TABLE OF CONTENTS
1INTRODUCTION 1
2GETTING STARTED 2
2.1 Connectors 2
3USING THE METER 4
3.1 Electrodes 4
3.2 Display/ Keys 6
3.3 Screen Display 8
4pH OPERATION 9
4.1 Using Setup 9
4.1.1 View pH Electrode Slope 12
4.1.2 Clear pH Standardization 13
4.1.3 pH Buffer Group 14
4.1.4 Temperature Unit 15
4.1.5 Set pH Resolution 16
4.1.6 Stability Indicator (Only available in AB15+) 17
4.1.7 Baud Rate (Only available in AB15+) 19
4.1.8 Parity Bit (Only availble in AB15+) 21
4.1.9 Stop Bit (Only available in AB15+) 23
4.1.10 Print Current & Stored Data/ Clear Stored Data (Only available in AB15+) 25
4.1.11 Clear Stored Data (Only available in AB15+) 27
5STANDARDIZATION 29
5.1 Standardization Procedure 29
5.2 pH Electrode Diagnosis Indicator 33
5.3 Standardizing with buffers from different buffer sets 34
6MEASUREMENT 36
6.1 Measurement Procedure 36
7mV OR RELATIVE mV OPERATION 38
7.1 Absolute mV 38
7.2 Relative mV 39
7.3 Temperature Calibration (Only available in AB15+) 40
8MEMORY (Only available in AB15+) 41
8.1 Store Value Into Memory 41
8.2 Recall Value From Memory 42
9PRINT DATA (Only available in AB15+) 44
9.1 Printing Data 44
10 pH THEORY 45
10.1 Measuring pH 46
11 CLEANING 47
12 TROUBLE-SHOOTING 47
13 METER SPECIFICATIONS 48
14 WARRANTY 49
15 NOTICE OF COMPLIANCE 50
16 REPLACEMENT PARTS 51
16.1 Replacement parts 51
16.2 Accessories 51
16.3 pH Buffers and Solutions 52

1 INTRODUCTION
Thank you for selecting the Accumet AB 15/ 15+ bench-top meter.
This instruction manual describes the operation of the meter. The
state-of-art meter that you have purchased is easy to operate and will
guide you through the various functions by displaying easy to
understand prompts.
This instruction manual is designed to provide all the information
necessary to guide you through the process of measuring pH or mV
with a series of prompts on the screen.
)
You will find this symbol appearing in this manual; it indicates useful
tips that ease your meter operation.
The Accumet AB 15/ 15+ meter provides microprocessor precision in
a compact benchtop design that is easy to use. This meter allows you:
Measure pH, absolute mV , relative mV or temperature
Select one of three sets of standard buffer groups
Standardize with up to five/ six buffers
It all adds up to rapid, completely automatic, intuitive operation.
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2 GETTING STARTED
2.1 Connectors
1. Review the layout and arrangement of the rear connector panel.
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2. Connect the electrode arm to the base.
3. Connect the power cable to the connector cable to the rear
connector panel power jack and to a power source.
3

3 USING THE METER
3.1 Electrodes
This meter allows you to use two types of pH electrodes: the
conventional glass pH electrode and the field effect transistor (FET)
electrode. If both types of electrodes are connected, the meter will
read the FET electrode.
1. Carefully remove the protective
cover from the end of the electrode.
Before first using your glass pH
electrode, soak it 2-4 hours in an
electrode storage solution, pH 4
buffer, or KCI solution.
2. Remove the shorting cap on BNC connector. Connect the
combination pH electrode in to the BNC input connector.
If a combination electrode isn’t used, connect the indicating pH
electrode into the BNC input connector. Plug the reference
electrode into the reference pin jack. Also, install the ATC probe
into the ATC jack.
Note: be sure to connect all probes to the appropriate channel
connectors (for example: Input 1, Ref 1 and ATC1).
Option: Connect the optional FET electrode by plugging it into
the FET jack on the back meter panel. Allow the FET electrode to
warm up five minutes before use.
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3. Rinse and blot-dry (don’t wipe)
electrodes between each
measurement. Rinse electrodes
with distilled or deionized water,
or a portion of the next solution
to be measured.
4. Between measurements, store
conventional pH electrodes
storage solution, pH 4 buffer, or
KCI solution. Always leave the
filling hole of liquid filled
combination electrodes open.
Refill when the level of
solution gets below the
manufacturer’s recommended
level.
)
Proper electrode care is fundamental to obtaining reliable pH
measurements. Improper care of the electrode may cause the
meter reading to drift, respond slowly, or produce erroneous
readings. For this reason, the electrode should always be
conditioned and used in accordance with manufacturer’s
instructions.
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3.2 Display/ Keys
Overview of the meter screen display and function key layout.
Press std key to initiate
standardization from measure
mode. Or press std key at the
Standardize mode to confirm
the standardization and return
to Measure mode.
Press mode to select pH, mV
and Relative mV.
Press setup key to access
setup for configuration of meter
setting.
Press print key to print stored
data from memory or current
reading to a PC or printer
(depending on meter setup).
Press enter key to confirm
selection or change being
made.
Press save/ ▲key to
increment value or scroll up
selection.
Press view/ ▼key to
decrement value or scroll down
selection.
Press save/ ▲key to store
displayed data into memory
Press view/ ▼key to recall
and select memory location of
stored data
Press stdby key to start up or
put the meter in standby mode.
Meter Display: AB15+
)
save/ ▲and view/ ▼keys perform different functions whilst in
different modes. These keys are only available in Accumet AB15+.
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Meter Display: AB15
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3.3 Screen Display
Familiarize yourself with the layout of the digital screen display.
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4 pH OPERATION
4.1 Using Setup
The setup button is in essence a scroll key which allows you to
change several operating parameters. While in the setup mode you
may:
mode
setup
print
enter
Press the mode key to return to the Measure
screen without making a change or selection in
the setup mode.
Press the setup key to scroll through the
remaining selection options available.
Press the enter key to accept a change or
selection in the displayed parameter.
The meter will then return to the measurement
mode.
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pH
View
% SLOPE
BUFFER
select
pH
sel ect
STA BLE
Print
Print
Print
Print
View pH electrode slope
- View the pH electrode slope in
% after 2-point standardization
is successfully done.
pH buffer group
- Select from 3 different buffer
groups, each containing 5-6
buffers, for auto buffer
recognition.
pH resolution
- Select various pH resolution
either 88.888, 88.88 or 88.8.
(0.001/ 0.01/ 0.1)
Temperature Unit
- Select unit of measure for
Temperature either in °C or °F.
Stability Indicator
-Set the stability indicator to be
displayed on the screen. Select
On or OFF.
Baud Rate
- To set the baud rate
(bits of second) of the
communication protocol
interface. Select from 4800,
9600, 19200 or 38200.
Parity Bit
- Set the parity bit of the
communication protocol
interface. Select 0(none),
1(odd) or 2(even).
Stop Bit
- Set the stop bit of the
communication protocol
interface. Select 1 or 2.
Print Data
- To print current displayed
data or data stored in the
meter’s memory to a
computer or printer via
Rs232.
Clear Stored Data
- To clear all stored data sets
for new data to be stored.
2 4 7 10 12
°C
4 7 10
clear
BUFFER
Clear pH standardization
- To clear pH standardized
buffers.
clear
Overview of Setup Menus in AB15+
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11
pH
View
% SLOPE
BUFFER
select
pH
sel e ct
V
iew pH electrode slope
- View the pH electrode slope in
% after 2-point standardization
is successfully done.
pH buffer group
- Select from 3 different buffer
groups, each containing 5-6
buffers, for auto buffer
recognition.
pH resolution
- Select pH resolution either
88.88 or 88.8.
(0.01/ 0.1)
Temperature Unit
- Select unit of measure for
Temperature either in °C or °F.
2 4 7 10 12
°C
4 7 10
clear
BUFFER
Clear pH standardization
- To clear pH standardized
buffers.
Overview of Setup Menus in AB15

4.1.1 View pH Electrode Slope
This setup menu allows you to view the pH electrode slope in % after
2-point standardization is successfully done.
1 Press setup to view the pH electrode slope in %.
pH


press to select options
press to accept
setup
enter
ELECTRO DE
% SLOPE
2 If the unit has not been standardized, a series of dashes will
appear on the display rather than a number.
% SLOPE
pH
3 Press enter or mode to return to measurement
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4.1.2 Clear pH Standardization
The setup option allows you to clear the previous pH standardization.
To clear pH Standardization
1. Access the Clear pH Standardization menu from the pH Measure
screen by pressing the setup key.
2. Press setup again to display the clear BUFFER icon is displayed
along with the previously entered buffers.
clear
BUFFER
4 7 10


press to select options
press to accept
setup
enter
3. Press enter to clear all existing buffers.
4 Press enter key to confirm selection OR press mode key to exit
to measurement OR press setup key to access other setup
options.
NOTE: If no buffers have been entered, the meter will skip this
screen.
)
You can escape setup mode at any time by pressing mode.
Pressing enter will always return the display to the Measure
screen after accepting the setup option.
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4.1.3 pH Buffer Group
This setup option allows you to select from 3 different buffer groups,
for auto buffer recognition.
The 3 buffer groups are:
USA buffers: 2, 4, 7, 10 and 12
European buffers: 1, 3, 6, 8, 10 and 13
NIST buffers: 1.68, 4.01, 6.86, 9.18 and 12.46
To Select pH Buffer Group
1 Access the pH Buffer Group menu from the pH Measure screen
by pressing the setup key and the screen will display the
BUFFER select icon.
BUFFER
select
2 4 7 10 12


press to select options
press to accept
setup
enter
2 Press enter to accept the group and return to the Measure
screen, or
3 Continue to press setup until the desired buffer group is
displayed.
1 3 6 8 10 13
BUFFER
select
1.68 4.01 6.86 9.18 12.46
BUFFER
select
4 Press enter to accept the desired buffer group and return to the
Measure screen.
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4.1.4 Temperature Unit
This setup option allows you to select unit of measure for
Temperature either in °C or °F.
To Select Temperature Unit
1 Access the Select Temperature Unit menu from the pH Measure
screen by pressing the setup key.
2 Press setup to scroll until screen displays as follows. Press
setup to display the select TEMP UNIT icon.
sel ect
3 Press enter to accept the °C temperature unit and return to the
Measure screen, or
4 Press setup again to display the °F unit.
sel ect
5 Press enter to accept the °F unit and return to the Measure
screen.
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4.1.5 Set pH Resolution
This setup option allows you to select various pH resolution either
0.1, 0.01 or 0.001 (only available in AB15+).
To Select pH Resolution
1 Access the Select pH Resolution menu from the pH Measure
screen by pressing the setup key.
2 Press setup to scroll until screen displays as follows. Press
setup to view the three decimal point resolution selection.
(Three decimal resolution only available in Accumet AB15+)
pH


press to select options
press to accept
setup
enter
3 Press enter to accept this resolution and return to the Measure
screen,
OR
4 Press setup again to display two/ one resolution setup options.
pH
pH
5 Press enter to accept this resolution and return to the measure
screen.
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6 Press enter key to confirm selection OR press mode key to exit
to measurement OR press setup key to access other setup
options.
4.1.6 Stability Indicator (Only available in AB15+)
This setup option allows you to set the stability indicator to be
displayed on the screen whenever reading has stabilized, thus
minimizes guesswork.
To Set Stability Indicator
1. Access the Set Stability Indicator menu from any Measure screen
by pressing the setup key.
2. Use the setup key to scroll until the screen displays the stable
icon is shown.
STABLE


press to select options
press to accept
setup
enter
3. Press enter to enable the “STABLE” OR press setup again to
select to disable the STABLE option.
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