Hach-Lange TITRALAB 840_845 Reference Manual - Manual (Page 166)

Titra Lab ® TitraLab 840 and 845 Reference Manual
Page 166
Running a
sequence with a
sample changer Before running a method or a sequence (sequence with a SAC80 or
SAC850 Sample Changer), perform the following operations in the
order listed below:
1. Select sequence.
Refer to "Select sequence", page 175 .
2. If a Question mark "?" is present in the Reagent and/or Electrode
tabs, it means that the sequence needs to be programmed - a
reagent or an electrode is missing. Review programming in
Supervisor mode.
Refer to "Programming sequence", page 139 .
3. Install the sample changer and connect it to the SAC socket of the
Titration Manager using the cable, part no. A95A202 or A95X501.
Refer to the User’s Guide of the sample changer
(part no.: D21T013 for a SAC80 or D21T085 for a SAC850).
4. Connect/Check electrodes.
Refer to "Electrode connection", page 86 .
5. Install/Check reagent(s). Refer to "Install reagent", page 108 .
6. Prepare the sample stack. Refer to "Sample stack", page 174 .
7. Press 1 in the Main window to run the sequence from the first
beaker of the sample stack.
8. If prompted to do so, enter the User’s name (ID) and press 1.
9. The sample changer cycle is initiated.
- 1 to 9 dynamic rinses (if programmed with a SAC850)
- 1 to 3 static rinses (if programmed).
- Electrodes are dipped into the first beaker. Titration starts.
- Between each sample tests (beakers), 1 to 9 dynamic rinses (if
programmed with a SAC850) then 1 to 3 static rinses are per-
formed (if programmed to do so).
10. At the end, the Titration Manager displays the mean result and
standard deviation calculated for all accepted tests. The result
takes into account the drift saved during the equilibration step.
When running a sequence with a SAC80 Sample Changer,
do not use the STOP key of the SAC80.
See also "Electrode calibration (SAC sequence)", page 83 .
See also "Reagent calibration (SAC sequence)", page 146 .
SAC arm
obstructed
(SAC error) The arm has been blocked and or cannot function properly.
Remove the obstruction and press Resume analysis (key 1) to
continue the sequence from the point it stopped.