Hach-Lange TITRALAB 840_845 Reference Manual - Manual (Page 192)

Titra Lab ® TitraLab 840 and 845 Reference Manual
Page 192
Titre Enter/
Calibrate Enter
If you already know the reagent concentration and do not wish to per-
form a calibration.
Calibrate
If you wish to perform a calibration. The Titration Manager will prompt
you to enter the calibration parameters.
It is not necessary to calibrate an addition reagent. It is there-
fore recommended to select Titre = Enter so that the calibration
parameters are not displayed.
Enter in:
Edit reagent menu.
Tray missing
(SAC error) On starting a sequence, the sample changer cannot read the RFID
tag of the turntable. Check that a turntable is correctly mounted on the
sample changer.
Check the model of turntable used and refer to the User’s Guide of the
sample changer, chapter 6 "Accessories".
Solve the problem then restart the sequence.
TTL 5 V OUT
(sockets) Red and black banana sockets (diameter = 2 mm).
The red banana sockets send a TTL 0 ± 5 V.
The black banana sockets are connected to the electrical zero of the
instrument.
This auxiliary signal is programmed in the Method parameter or Rea-
gent parameter menus,
see "Auxiliary output", page 42 .
Specifications (potential difference is given in absolute value)
Output signal
Level 0: 0 to 0.4 V
Level 1: higher than 2.4 V and equal to or less than 5 V
Output impedance: 1 KOhm at level 0 and 2 kOhm at level 1
A TTL 0-level does not mean a 0 V output.
The voltage difference varies from 0 to ±400 mV.