WATERS CORPORATION 2424, Operator'S Manual, Page: 92 / 196

3-28 Operating the Detector
Use Enter and the numeric keypad or and to select the appropriate
entry.
• Lamp – You can configure the lamp input level to ignite or extinguish
the tungsten lamp on or off from an external device as follows:
–
High – Ignite the lamp on when contact closure is On (closed).
– Low – Ignite the lamp on when contact closure is Off (open).
– Ignore – Do not respond to lamp input.
Use Enter and the numeric keypad or and to select the appropriate
entry.
The default for Inject, Chart mark, and Auto zero is low; the default for the
Lamp parameter is Ignore.
Tip:
Controlling the lamp state by the event input overrides keypad control.
Configuring stop flow output
The stop flow output is an output switch. Its default active state is On, which
can be changed to Off on the second configuration screen.
When the active state is Off, the stop flow output is normally On, until a stop
flow error condition occurs. At that point, the stop flow output is changed to
the Off state.
Requirement:
To automatically stop the chromatographic flow to the system
in the event of an error condition or hardware failure, the Stop Flow signal
must be connected to the chromatographic pump.
Setting pulse periods
You use the third configuration screen to set pulse width or to activate a
rectangular wave on the switch.
• Single pulse (in seconds) – If the switch is programmed to generate a
pulse as a timed or threshold event, then the period of the signal (single
pulse width) is as specified in this field (range is 0.1 to 60 seconds).
• Rectangular wave (in seconds) – If the switch is programmed to initiate
a rectangular wave as a timed or threshold event, then the period of the
Warning:
Fire and explosion hazard. Failure to connect the stop flow
output could cause the detector to flood.