Operational Guide
21
edge’s pH meter operation is configured by using the SETUP key with a pH probe
connected to the meter. The parameter-specific options will be seen inserted
into the menu. If Basic mode is “On”, the pH parameter list will not be displayed.
See Basic mode for a description of this operation before choosing how to
SETUP the meter.
Option
Description
Choices Default
Basic mode
Basic Mode
When “On”, a limited set of
parameters and calibration
buffers are available for
use.
Off or
On
Off
Available
Information
Visual indication of buffers
used, Probe Condition
and Response times are
determined and displayed
when calibration uses 7 and
4 and/or 10 pH buffers.
Off or
On
On
Buffers used, probe
conditions, and
response times are
not displayed.
First Custom
Buffer
When “On”, it permits the
user to enter a custom pH
buffer value to use during
electrode calibration.
Off or
value
Off
Not Available
Second
Custom Buffer
When “On”, it permits the
user to enter a custom pH
buffer value to use during
electrode calibration.
Off or
value
Off
Not Available
First
Calibration
Point
Allows the user to choose
how the first point in
calibration will be made.
Offset
or point
Offset
Not Available
(automatically uses
Offset).
Resolution
Allows the user to select
between 0.01 and 0.001 pH
resolution.
0.01 or
0.001
pH
0.01 pH
Not Available
(automatically uses
0.01 pH resolution).
Set Out Of
Calibration
Range
When set to “On”, a
measurement that is
outside the calibrated
range (buffers used) will
trigger a warning message.
Off or
On
On
Not Available, No
Error messages
displayed.
pH Meter
Configurations
pH
Calibration
Calibration in Standard Mode
pH operation in standard mode offers full function of edge®. This includes
seven standard buffers and two custom ones. Five pH buffers may be used for
calibration.
The instrument should be recalibrated whenever:
•
High accuracy and sensor verification are required.
•
The pH electrode is replaced.
•
At least once a week.
•
After testing aggressive chemicals.
•
If ”CAL DUE” is displayed on the third LCD line.
Every time you calibrate the instrument use fresh buffers and perform electrode
maintenance as required. It is advised to choose calibration buffers that bracket
the sample pH.
www.
.com
1.800.561.8187