Hach SL250 Manuel D'utilisation Simplifié page 12

7.3 Complete Chemkey measurements
Do not start a new Chemkey measurement when other Chemkey measurements are not yet completed. Only put
the meter in the sample once for a Chemkey measurement.
To complete a measurement with the Chemkey(s), do the procedure that follows. Refer to
Multiple probe measurements can be completed at the same time. Refer to
measurements on page 14.
1. Set the meter power to on.
2. If complete traceability is necessary, enter a site ID and operator ID before measurement. Refer
to Use an operator ID
3. Push the applicable Chemkey(s) fully, in one movement, into the slot(s). Make sure to always use
a new Chemkey for each measurement. It is important to push the Chemkey all of the way into
the slot.
When a Chemkey is in a slot, do not move or touch the Chemkey.
4. Rinse the sample cup with the sample.
5. Fill the meter sample cup to the fill-line with the sample.
6. Put the meter into the meter sample cup.
7. Wait for the sound alert and/or the meter removal animation (within 1 to 2 seconds), then
immediately remove the meter from the sample cup.
Put the meter back into the case and wait until the measurement is completed. The parameters
have different reaction times. The display shows a progress bar with the time that remains until
the measurement is completed.
8. The measurement values are shown on the display.
Note: When an error shows, push Details for more information.
2
Procedures that use two Chemkeys at the same time (e.g., some ammonia methods) are not
possible with the SL250 meter.
12 English
N O T I C E
on page 11 and Use a site ID
Complete probe
on page 11.
2
Figure 7.