HACH LANGE sensION Série Manuel D'utilisation page 11

Note: To calibrate with only 1 or 2 standards when additional standards are
supplied, push after the first or second standard is measured.
View the calibration data
Data from the most recent calibration can be shown for pH, ORP and
conductivity.
1. Push .
2. Use the arrow keys to change the parameter, if necessary, and push
.
3. Push and at the same time. The 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.
Restore the factory calibration
The user calibration can be erased and the factory calibration restored
for pH, ORP and conductivity.
1. Push . The parameter flashes.
2. Use the arrow keys to change the parameter, if necessary.
3. Push and hold until OFF is shown.
The factory calibration for the selected parameter is restored.
Adjust the calibration
The instrument can be adjusted to read a specified solution value for pH,
ORP and conductivity.
1. Rinse the probe. Put the probe in the solution.
2. Push to read the value of the solution.
3. Push . The parameter flashes.
4. Use the arrow keys to select the parameter, if necessary.
5. Push and hold and then push .
The measured value flashes.
6. Use the arrow keys to change the value.
7. Push . The display shows OK.
Adjust the temperature
The temperature measurement can be adjusted at 25 °C (77 °F) and/or
85 °C (185 °F) to increase accuracy for pH, ORP and conductivity.
Note: Refer to the probe documentation to find the temperature limits for the probe
that is used.
1. Put the probe and a reference thermometer in a container of water at
approximately 25 °C and allow the temperature to stabilize.
2. Compare the temperature read by the meter with that of the
reference thermometer. The difference is the adjustment value for
the meter.
Example: reference thermometer: 24.5 °C; meter: 24.3 °C.
Adjustment value: 0.2 °C.
3. Enter the adjustment value for the 25 °C reading:
a. Push . The parameter flashes.
b. Use the arrow keys to select tEn.
c. Push . 25 °C is shown.
d. Push and then use the arrow keys to enter the adjustment
value for 25 °C. Push . 85 °C is shown.
4. Put the probe and a reference thermometer in a container of water at
approximately 85 °C and allow the temperature to stabilize.
5. Compare the temperature from the meter with that of the reference
thermometer. The difference is the adjustment value for the meter.
6. Push and then use the arrow keys to enter the adjustment value
for the 85 °C reading. Push
About sample measurements
Each probe has specific preparation steps and procedures for taking
sample measurements. For step-by-step instructions, refer to the
documents that are included with the probe.
.
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