Hach-Lange HQD - Luminescent Dissolved Oxygen Probe LDO - Manual (Page 9)

DOC272.53.80021 9
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 will display to name the method after 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 repeatedly adjusting 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.
There are three default methods provided for the LDO101 probe:
• Factory Cal (Calibration with default LDO calibration)
• User Calibration—100% (allows user calibration)
• Default
1. Make sure a probe is connected to the meter.
2. Push the METER OPTIONS key and select (Probe Model) Settings.
3. Select Modify Current Settings.
4. Select Units to change the units to mg/L (default) or to %.
5. Select Measurement Options.
6. Update the settings:
Calibration options
• Calibration
• User 100%
• User 100% with 0
• User mg/L
• User mg/L with 0
• Factory
• Calibration reminder
• Reminder repeat: Off, 8 h, 12 h, 1 d,
2 d, 5 d, 7 d
• Calibration expires: Immediately,
• Reminder + 30 m, Reminder + 1 h,
Reminder + 2 h, Continue Reading
Table 1Parameter-specific settings
Setting Options Description
Table 2 Measurement options settings
Setting Options Description
Resolution
0.1—Fast (0.35 mg/L)/min
0.01—Fast (0.35 mg/L)/min
0.01—Medium (0.15 mg/L)/min
(default)
0.01—Slow (0.05 mg/L)/min
The resolution affects the number of decimal places and
the stabilization time. Higher resolution measurements take
more time to stabilize.
Measurement
limits
Lower limit (default: 0.0 mg/L; 0%)
Upper limit (default: 20.0 mg/L;
200%)
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
will show an "Out of limits" message. This message is an alert to a
potential problem with process conditions.