Hach-Lange PHC28103 - Manual (Page 7)

Change measurement options
Methods are groups of default or user-defined settings relevant to specific applications. If
the meter is set to the default method and the Modify Current Settings option is chosen, a
prompt for a new name is shown after the changes are entered. The settings are saved
with this name to distinguish them from the default method settings, which cannot be
changed. A saved method can be used instead of multiple adjustments to the individual
settings. Changes made to a user-defined method are automatically saved with the
existing name. Multiple methods can be saved for the same probe on each meter.
1. Make sure a probe is connected to the meter.
2. Push and select PHC281 Settings.
3. Select Modify Current Settings.
4. Select Units. Select pH (default) or mV.
Note: The mV option can be used to find the probe offset in a pH 7 buffer or to measure the
slope. Both units are shown when the detail display mode is selected.
5. Select Measurement Options and update the settings:
Option Description
Resolution Sets the resolution:
• 0.1pH—Fast
• 0.01pH—Fast (default)
• 0.01pH—Medium
• 0.01pH—Slow, or
• 0.001pH—Slow
The resolution affects the number of decimal places and the stabilization
time. Higher resolution measurements take more time to stabilize. Slower
stabilization times provide higher accuracy measurements.
Measurement
Limits Set the measurement limits—Lower limit (default: 0.00 pH) or Upper limit
(default: 14.00 pH).
The measurement limits can be set to match the acceptable values for the
sample. When the measurement is above the upper limit setting or below
the lower limit setting, the meter shows an "Out of limits" message. This
message is an alert to a potential problem with the process conditions.
6. If prompted, enter a name for the new method settings. Additional changes made to
the settings of an existing method are automatically saved with the same method
name.
7. Push EXIT until the meter returns to the measurement mode.
Change calibration options
1. Make sure a probe is connected to the meter.
2. Push and select PHC281 Settings.
3. Select Modify Current Settings.
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