Waters 2998 Operator's Manual page 41

Connecting injection trigger signals
The detector accepts the following injection trigger signals from a manual
injector:
• Inject start signal from a contact closure signal with each injection
• Auto zero signal to adjust the zero offset of the detector each time the
injector makes an injection
Each time the detector receives a signal from an injector, it performs the
corresponding auto zero or inject start function.
To send an auto zero or chart mark signal from an injector to the detector,
make the connections shown in the following tables and figures.
The firmware defaults to auto zero on inject.
Tip:
Inject start connections to an injector (pulse duration 0 to 10 seconds)
2998 PDA detector (connector A)
Pin 1, inject start + (red)
Pin 2, inject start – (black)
Inject start connections to an injector
2998 PDA detector connector A
Injector connector
Two spade lug (or similar) terminal
connectors.
Injector
+
1 Inject Start
−
2 Inject Start
3 Ground
+
4 Lamp Off
−
5 Lamp Off
+
6 Chart Mark
−
7 Chart Mark
8 Ground
+
9 Auto Zero
−
10 Auto Zero
Making signal connections 2-15