4. Push ENTER to keep the changes and go back to setup mode.
Note: To exit and not keep the changes, push CANCEL.
Calibrate for conductivity and TDS measurement
Calibrate the meter with up to five calibration points with conductivity or TDS standards. If the
calibration point is 20% larger than a calibration point in storage, both conductivity points are kept. If
the calibration point is 20% smaller than a calibration point in storage, only the new calibration point
is kept. If there are five calibration points in storage, the new calibration data replaces values near
the same range.
By default, the meter uses the temperature coefficient of 2% per °C. The user can set the coefficient
in setup mode. Review calibration points in setup mode.
Note: Salinity measurements are identified from conductivity.
1. Set the power to on.
2. Push COND or TDS.
3. Put the probe in the first standard solution. The meter measures the standard.
4. Use the arrow keys to select the value of the conductivity or TDS standard.
5. Push ENTER. The main display shows, then the "WAit" icon flashes.
Note: Push TDS or COND to stop calibration. The meter stops the current calibration and keeps the previous
calibration data.
6. Push CAL. The main value flashes.
7. To erase all previous calibration points, slopes and offset values, push CAL, then DELETE.
Ignore this step to update a previous calibration with a single point calibration.
8. Push COND or TDS to read the conductivity or TDS value of any solution.
9. Do steps 2 through 9 again to complete multiple calibration points (maximum of 5).
10. When the calibration is complete, the meter shows the slope as compared to the nominal
sensitivity for a probe of that cell constant and the total number of conductivity and TDS
calibration points in the meter.
Note:
The number at the bottom right corner of the display is the calibration points that are in the meter. The
value above the slope is the slope relative to the nominal sensitivity.
Set the DO operations
Use the steps that follow to set: the calibration alarm, the measurement units, the calibration units,
1 or 2-point calibration points and the calibration methods. Make sure that the operations are
completed in order.
Note: If the DO calibration units are changed in setup, (e.g., from % to ppm), the meter automatically changes the
values entered when the calibration method is setup to the selected units. Since the conversions are approximate,
for maximum accuracy, enter the necessary values in this procedure in the correct calibration units.
1. Set the power to on.
2. Push SETUP, then DO to put the meter in DO mode.
3. Use the arrow keys to select an option, then push ENTER:
Operation Function
DO calibration alarm
• Sets the alarm from 1 to 999 hours. The recalibration alarm is set to OFF at 000 hours.
• Push ENTER to go back to setup mode.
• Push ENTER, then DO.
• Use the arrow keys until "Unit" shows.
Measurement units Use the arrow keys to set the DO measurement units (mg/L, %, salinity or ppm).
Calibration units Use the arrow keys to set the DO calibration units (mg/L, % or ppm).
English 23
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