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20

Troubleshooting

Troubleshooting

Problems and Possible Solutions

Problems

Possible Cause

Possible Solutions

Excessive Venting

Wrong “Sample Type” selected

Verify the "Sample Type” in the method. To view method parameters, 
select the method and select the information icon located at the 
top of the screen. “Organic” is the recommend sample type for most 
samples. Contact CEM before selecting any other sample types.

Vessel Plug not in place

Place vessel plug on top of liner before securing with the cap. See 
“Vessel Assembly” for detailed instructions.

Vessels not properly torqued

Use provided torque tool to torque vessel

.

TempGuard message 
appears during run

Some vessels are hotter than 
others

• See “Liner Bake-out Procedure” to reduce differences in liners.
• Do not batch old and new liners. Run in separate turntables.

Uneven bar graphs during 
run

Not enough similarity in sample 
type or sample weight

Select samples with similar properties or use same in all vessels 
and similar sample amounts.

Different acid(s) or acid volumes 
being used in vessels

Run the same acid(s) and acid volume in each vessel in the 
turntable.

Some vessels are hotter than 
others

See “Liner Bake-out Procedure” to reduce differences in liners.

Some vessels contain acid 
blanks

See "Sample Preparation Safeguards" for specific details when 
running acid blanks.

Sleeve appearance has 
changed

Sleeve has turned white (no 
longer golden brown) and/or 
stained on ends

Replace sleeve. To prevent sleeve damage, avoid high temperatures 
for long periods of time. Wipe sleeves with damp cloth and allow to 
dry if sleeve comes in contact with acid.

Summary of Contents for MARSXpress 10 mL

Page 1: ...MARSXpress 10 mL 20 mL 55 mL 75 mL Microwave Digestion Vessel Manual...

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Page 3: ...er and Plug Conditioning 8 Non Nitric Acid Liner and Plug Conditioning 9 Perform a Digestion Vessel Assembly 10 Turntable Setup 12 Load and Perform a Method 13 Vessel Removal 14 Cleaning and Inspectio...

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Page 5: ...tion as described below NOTE A NOTE is intended to provide emphasis on procedures that may be misinterpreted or overlooked or to clarify confusing situations CAUTION A CAUTION is intended to provide e...

Page 6: ...take the guesswork out of method creation and sample preparation The MARS 6 requires software version 1 49 or newer to operate MARSXpress This manual is intended for use by both novice and experience...

Page 7: ...All Acids and Acid mixtures excluding HF 210 C 210 C 210 C 210 C HF 180 C 180 C 180 C 180 C Maximum Hold Time 200 210 C 45 min 45 min 45 min 45 min 180 200 C 60 min 60 min 60 min 60 min 180 C 90 min...

Page 8: ...if TempGuardTM is triggered The fully loaded turntable without sample may be heavy 25 pounds 11 kg Use caution when lifting and loading into the cavity Do not place fingers beneath the turntable when...

Page 9: ...ortant Safeguards Perchlorates Ammonium Potassium etc Ethers Cellosolve Ethylene Glycol Phenyl Ether etc Lacquers Alkanes Butane Hexane etc Ketones Acetone Methyl Ethyl Ketone etc and Alcohols Methano...

Page 10: ...s visit our website at www cem com A list of parts can be found on the Products page under MARS 6 WARNING Only use consumables accessories vessels and vessel components purchased directly from CEM or...

Page 11: ...7 Vessel and Accessories Overview Vessel Components 1 3 2 4 Item 1 Liner 2 Vessel Plug 3 Cap 4 Sleeve Accessories Turntable Torque Tool Vessel Rack A 24 place outer row only turntable is available...

Page 12: ...of tea leaves or appropriate sample into each liner Never add sample or liquid to liner with sleeve in place 3 Add 10 mL of HNO3 to each liner Use the acid to rinse the inside of the liner to ensure t...

Page 13: ...it 15 minutes to allow pre digestion 5 Assemble and torque each vessel See Vessel Assembly for detailed instructions 6 Select and load the Xpress Clean method from the One Touch directory 7 Place vess...

Page 14: ...TION Do NOT batch old liners with new liners unless new liners have been conditioned 4 Add the sample to the liner s 4 1 Inspect liners for abnormalities 4 2 Weigh and transfer the sample into the lin...

Page 15: ...acing away from the user at all times Never look directly at the vent hole once it has been placed on the liner 8 Hold the vessel and tighten the cap using the provided preset torque tool until a sing...

Page 16: ...mblies into the turntable one by one See Vessel Distribution section of this manual for optimal vessel distribution A minimum of 4 vessels per run is required View Important Safeguards NOTE The sleeve...

Page 17: ...eded creating a new method 1 1 To view method parameters select the method and select the information icon located at the top of the screen 2 Close the instrument door 3 Select Start to run the method...

Page 18: ...acids 2 Remove the turntable from the instrument Keep the vent holes facing away from the user when transporting the turntable 3 Remove the vessel assemblies from the turntable one by one keeping the...

Page 19: ...10 mL of acid that had been used for sample digestion HNO3 HCl H2 SO4 H3 PO4 or HF 4 2 Prepare vessel and turntable as outlined in manual 4 3 Select and run the Xpress Clean method in the One Touch di...

Page 20: ...eeves Sleeves should be smooth and golden brown Discard sleeves that are distorted or flared Discard sleeves that have stains on the ends This occurs when liquid acid wicks up into the composite layer...

Page 21: ...mber of Vessels Vessel Distribution 1 16 Inner row only even distribution 17 24 Outer row only even distribution 25 40 Inner and outer rows even distribution CAUTION A minimum of 4 vessels per run is...

Page 22: ...thods 2 Select at the top of the screen to begin creating a One Touch Method 3 Select Method Name and enter in a name 4 Select Temperature and enter the desired temperature 5 Select Sample Type and ch...

Page 23: ...ion of this manual Wipe inside of MARS cavity including the sensors with a lint free damp cloth Inspect liners plugs caps and sleeves See Cleaning and Inspection for acceptable wear on these component...

Page 24: ...r Bake out Procedure to reduce differences in liners Do not batch old and new liners Run in separate turntables Uneven bar graphs during run Not enough similarity in sample type or sample weight Selec...

Page 25: ...he US or 704 821 7015 and ask for Analytical Support or email MARS applications support at analytical support cem com Technical Support CEM is proud to provide technical support from a team of special...

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Page 28: ...ue de Saclay 4 rue Rene Razel 91892 ORSAY Cedex 33 01 69 35 57 80 Fax 33 01 60 19 64 91 info fr cem com Germany Austria Switzerland CEM GmbH Carl Friedrich Gauss Str 9 47475 Kamp Lintfort 49 2842 9644...

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