Radiometer Analytical TitraLab 870, Reference Manual

Page: 250 / 286

Titra Lab ® TitraLab 870 Reference Manual
Page 250
TTL 5 V OUT/
TTL 12 V OUT
(sockets) Red and black banana sockets (diameter = 2 mm).
The red banana sockets send a TTL 0 ± 5 V or 0 ±12 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 55 .
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 (or 12 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.
TTL IN
(sockets) Red and black banana sockets (diameter = 2 mm).
The auxiliary input socket can be connected to an external device unit
used to send a titration start command . The red banana socket
receives a signal TTL 0 ±5 V and the black banana socket is
connected to the instrument electrical zero.
Specifications (potential difference is given in absolute value)
Input signal
Level 0: 0 to 0.8 V
Level 1: higher than 2 V and equal to or less than 5 V
Input impedance: 10 KOhm
The auxiliary input signal is programmed in the Configuration menu,
see "Auxiliary input", page 54 .
A TTL 0-level does not mean a 0 V output. The voltage
difference varies from 0 to ±400 mV.