Useful Information

The Diagnostic Text Display

(This display configuration is still around for historical purposes. Don’t confuse this display map with the Diagnostic Screens A through G.)

One of OPEN’s default displays is named Diagnostic (Figure 20‑22). This display can be useful when trouble shooting, as it contains all of the raw input signals, in addition to the standard computed variables.

To enable this display, Quik Pik (f1 level 6) in New Measurements mode.

Figure 20‑22. The diagnostic display map for New Measurements mode.

The quantities in levels a, c, d, f, and j are common system variables, also found in the standard display list. Levels b, e, and g contain the raw signals (mV) for the sensors.

User Channel Voltages

The spare analog input channels are shown in level i. These will show 0 mV if they have not been enabled via the ‘UserChan=’ configuration command.

System Flow Schematic

Figure 20‑23 provides a schematic of the flow components of the LI-6400.

Figure 20‑23. LI-6400 system flow schematic, with CO2 mixer option.

Chamber Connectors

The chamber cable has a 25-pin D-connector on the console end, and a 26-pin D-connector on the chamber end (Table 20‑2).

Table 20‑2. Chamber connector cable pin descriptions.
  Connector  
Description 26 Pin D Chamber 25 Pin D Console Comments
BlockTemp1 22 1  
BlockTemp2 10 3  
AirTemp1 21 14  
AirTemp2 11 16  
Match+ 23 2  
Match- 24 15  
Circ fan + 26 19 A normal fan motor has an impedance of 63 Ohms.
Circ fan - 25 7  
Tleaf 14 4  
Log 1 25  
+10V 7 11  
-9V 6 24  
Signal Gnd 8 12  
Power Gnd 9 13  
PAROut 18 5  
PARIn 15 17  
TEC1+ 4, 5 10, 23  
TEC- 2, 3 9, 22  
+12V 17 8  
TEC Fan 13 21  
Lamp+ 19 18 Warning: voltages can exceed 100V
Lamp- 20 6
Lamp Fan 16 20