Hach-Lange PHC10115 User Manual - Manual (Page 7)

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: 2.00 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 PHC101 Settings.
3. Select Modify Current Settings.
4. Select Calibration Options and update the settings:
Option Description
Buffer Set Sets the temperature compensated buffer set used for calibration—
• Color Coded—4.01, 7.00, 10.01 (default)
• IUPAC—4.01, 7.00, 10.01, 12.45
• DIN—4.65, 9.23
• IUPAC—4.01, 6.86, 10.01, 12.45
• IUPAC—4.01, 6.86, 9.18, 12.45
• IUPAC—4.01, 7.00, 9.18, 12.45
• Custom Buffer Set (refer to Table 2 )
Custom buffer sets are characterized at 25 °C (77 °F).
Buffer set values are shown on the Calibration Options screen.
Note: Only the minimum calibration points must be measured for DONE to
be shown on the calibration screen.
Buffer Set
Values If the Buffer Set is set to Customer Buffer Set, sets the custom buffer set
(refer to
Table 2 ).
Minimum Cal
Points Sets the minimum number of calibration points necessary before a
calibration can be completed—1 (default), 2 or 3.
Slope Limit Sets the slope limit—1% to 10% (acceptable slope criteria, default = 5%).
The slope must fall within set limits for successful calibration.
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