Hach SL250 Manuel D'utilisation Simplifié page 15

Figure 9 Sample measurement
Section 8 Calibration
Chemical exposure hazard. Obey laboratory safety procedures and wear all of the personal protective
equipment appropriate to the chemicals that are handled. Refer to the current safety data sheets
(MSDS/SDS) for safety protocols.
8.1 Calibrate the probe
Each probe uses a different type of calibration solution. Make sure to calibrate the probes frequently
to maintain the highest level of accuracy. The meter will show the calibration status. If the calibration
is not correct, the calibration icon with the question mark
correctly. When the calibration is correct, the calibration icon with the green checkmark shows. For
step-by-step instructions, refer to the documents that are included with each probe. Refer to the
manufacturer's website for more information.
1. Connect a probe.
2. Push Main Menu>Calibrate to start a calibration.
3. Select the applicable probe if more than one is connected to the instrument.
Note: If only one probe is attached this step does not show.
4. Complete the instructions shown on the display to calibrate the probe.
Note: For an ISE probe, push the RIGHT arrow to go to the next calibration standard as necessary. Measure
standards from low concentration to high concentration.
5. If necessary, do a verification. Refer to
8.2 Factory calibration
The manufacturer recommends that a full factory calibration be completed annually to make sure that
the system operates as intended. Please contact the Hach Service Center serving your location.
C A U T I O N
shows until the probe is calibrated
Probe verification on page 16.
English 15