Hach-Lange SENSION+ pH31 - Manual (Page 10)

View the calibration data
Data from the most recent calibration can be shown.
1. From the main menu use the or to select DATA LOGGER.
Confirm.
2. Select Display data.
3. Select Calibration data and confirm with . The last calibration data
is shown.
• pH-the slope and offset values are shown alternating with the
deviation (in %) and calibration temperature.
• ORP-the measured mV value and calibration temperature are
shown.
• Conductivity-the cell constant and calibration temperature for each
standard are shown.
Set the calibration reminder
The calibration reminder can be set between 0 to 23 hours or 1-7 days
(default 1 day). The display shows the remaining time to the new
calibration.
Note: When 0 days is selected, the calibration reminder is turned off.
1. From the main menu use the or to select CALIBRATION.
Confirm.
2. Use the to enter the calibration menu.
3. Use the or to select Cal. frequency and confirm.
4. Use the and to advance to the next step and use the or to
change a value. Confirm.
Push to start the calibration.
Sample measurements
Each probe has specific preparation steps and procedures for taking
sample measurements.
1. From the main menu use the or and and to select
MEASURE. Confirm.
2. Use the to change the following settings. Confirm every entry.
Option Description
Resolution Select the resolution: 1, 0.1, 0.01 (default) or 0.001
Measure Stability—select By stability Criterion: Fast (variation <
0.02 pH in 6 s), Standard (variation < 0.01 pH in 6 s) or Strict
(variation < 0.002 pH in 6 s). In continuous—enter the time
interval for the In continuous Acquis. interval (data storage or
printing data). By time—enter the time interval for data storage
or printing data.
Display mV Display mV—select YES or NO to show mV.
Limits Limits—select YES or NO. YES: Enter the upper and lower
limits. An acoustic warning appears when the measurement is
out of limit. The report output shows an A next to the
measured value when the measurement was out of limit.
Isopotential Isopotential—change the Isopotential pH value in Data
introduction. Select Calculate to calibrate the probe again.
3. Push to start the measurement.
Note: If the measurement is not stabilizing after 120 seconds, the meter turns
automatically into the continuous measurement mode.
Advanced operation
Use a sample ID
The sample ID tag is used to associate readings with a particular sample
location. If assigned, stored data will include this ID.
1. From the main menu use the or to select SYSTEM. Confirm.
2. Use the or to select Sample ID and confirm.
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