user manual

Input Calibration
January 2009 UDA2182 Universal Dual Analyzer Product Manual 149
Step Action Screen
4
Press
Enter
IN 1 pH/ORP Cal
Sample Cal
Auto Buffer Cal
Buffer Group
pH Offset
pH Slope
Reset pH Offset
Reset pH Slope
Buffer Cal
IN 1 pH/ORP Cal
Sample Cal
Auto Buffer Cal
Buffer Group
pH Offset
pH Slope
Reset pH Offset
Reset pH Slope
Buffer Cal
Use
to select
Sample Cal
5
• Put the unit in “Hold”
mode
• DO NOT Remove the
electrode from the
process.
6
Press
Enter
Follow the prompts at the top
and bottom of the screen.
“Place probe in Sample”
The display will show the pH of
the process as measured by the
electrode system.
“Press Enter when stable”
7
Collect a beaker of the process sample from a point near the
electrode mounting and measure its pH value with a calibrated
portable instrument.
Special instructions for high-purity water applications
For a high purity water application, do not remove the sample
from the process for measurement. Bring the portable instrument
to the sampling site and measure a continuously flowing sample
that has not been exposed to air. This prevents lowering the
sample pH by absorption of carbon dioxide from the air.
8
Once the reading is stable,
press
Enter
Change to Sample Value”
Use
keys to change the
displayed value to match the
value on the portable meter.
“Enter to save, Exit to cancel”
9
If the calibration fails, an error
message will be displayed
across the bottom stripe of the
screen.
Make necessary adjustments
and re-calibrate
Error Messages:
See Table 12-2.