V-3
Instrument Maintenance
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
1 . . . If .sample .flow .can .be .adjusted .with .the .pressure .regulator .to . .
50 .mL/minute .or .more, .skip .this .procedure . .
2 . . . Turn .off .sample .flow .by .turning .the .inlet .valve .to .the .right . .
3 . . . Remove .filter .hex .cap .using .1-inch .open-ended .wrench . .
4 . . . Separate .filter .cap .with .bypass .valve .assembly .from .filter .body, . .
retaining .ring .
5 . . . Remove .filter .element .and .soft .gasket . .(if .necessary) .
6 . . . Replace .gasket .and .press .new .sintered .element .into .filter .body . .
7 . . . Replace .hex .cap .and .bypass .valve .assembly .and .reposition .bypass .drain .
line .into .drain .assembly .
8 . . . Retighten .hex .cap .to .approximately .75 .pound-inch .in .torque . .
9 . . . Turn .on .sample .flow .by .1⁄4 .turn .of .inlet .valve .to .the .left . .
10 . .Check .for .leaks . .
Warning:
Replacement .of .DIPA .reagent .is .dependent .on .operating .
conditions .and .usage . . .Replacement .may .occur .as .long .as .60 .days .from .
installation . . .Be .sure .to .monitor .the .DIPA .levels .weekly .to .assess .proper .
replacement .schedule . . .DIPA .is .hazardous . . .Use .protective .glasses .and . .
gloves . . .Refer .to .bottle .label .and .MSDS .for .precautions . . .Work .in .a . .
well-ventilated .area . .
Danger:
Turn .off .the .air .pump .before .beginning .procedure; .otherwise, .the .
air .pump .will .spatter .caustic .reagent .outward .as .bottle .is .removed . . .
s
Refer .to .
Chapter III, Use of Setup Mode
for .instructions .to .turn .air .pump .
On/Off . .
1 . . . Remove .thumbnut .and .slide .reagent .bottle/adaptor .from .manifold .
assembly . .
2 . . . Unscrew .bottle .cap, .and .lift .adaptor .from .bottle . .
Replacement Sample
Inlet Filter
Replacement of DIPA
Reagent and Diffusion
Tubing Assembly
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