Hach Lange DR 3900 User Manual page 85

Content and definition of the keys
[Z] key / Zeroing
1. Press [Z] to program a zero reading.
2. Press OK to confirm.
3. Press New.
4. Press Zeroing and enter the wavelength for which the zero
reading is to be performed.
5. Press OK and confirm the entry.
6. Press OK.
7. If zero readings are to be carried out at a number of
wavelengths, repeat the steps starting with 1 for each
wavelength.
Note: The entered reading sequence is displayed.
Process Timer key
1. Press New.
2. Press Process timer to enter wait, reaction or handling
times.
3. Press OK and confirm the entry.
4. Press OK.
Note: This time is integrated into the measurement process.
Note: The entered reading sequence is displayed.
[R] key / Reading...
1. Press New.
2. Press [R] to program a reading of the substance that is to
be analyzed.
3. Press OK to confirm.
4. Press New.
5. Press Read...and enter the wavelength for which the
measurement is to take place.
6. Press OK and confirm the entry.
7. Press OK.
8. If readings are to be completed at a number of wavelengths,
repeat the steps starting with 1 for each wavelength.
Note: The entered reading sequence is displayed.
Expanded programs
85