II-8
Instrument Preparation
Thermo Scientific Orion 2111LL Sodium Monitor User Guide
ROSS and the COIL tradedress are trademarks of Thermo Fisher Scientific Inc. US Patent 6,793,787
Alarms / Relays
Analog Outputs
Temperature
ISE
Relay 1
(normally open)
9
Sout (mA)
Sodium Signal
8
ATC
-
Not Used
Relay 1
(normally open)
0
GND
Common Ground
*
9
ATC
3
Electrode
Shield
**
3
Relay 2
(normally open)
Tout (mA)
Temp. Signal
0
Solution
Ground
4
Reference
Electrode
4
Relay 2
(normally open)
-
7
Not Used
5
Not Used
5
Relay 3
(normally closed)
6
Sodium
Electrode
6
Relay 3
(normally closed)
7
Air pump
8
Air pump
Key Electrical Notes for the Orion 2111LL:
• . Fluid .ground .is .provided .through .the .Orion .ATC .Probe .(30 .kΩ), . .
Cat . .No . .2100TP . . .Only .an .Orion .ATC .probe .can .be .used .to .provide .
the .fluid .ground .
• . Do .not .connect .to .any .of .the .unused .terminals: .12-17, .21-22 .and .25 . .
• . Leave .factory .installed .jumpers .in .place .on .terminals: . .13-15-16 .
• . . Be .sure .to .hook .shield .to .underside .of .PCB .to .prevent .interferences . . .
Refer .to .
Figure II-7
.
*
Terminal 9 & 11 are not isolated from each other. They share terminal 10 as a
common ground.
** Do not attach external ground shield connections to terminal 23
*** Units shipped after October 2006 do not require the shield in Figure II-7
Terminal
Assignments
Figure II-7
Shield
***
Figure II-6
Terminal Assignments
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