FAQ Group
- (-) Remove Instrument set-up filter Instrument set-up
- (-) Remove Mixing filter Mixing
- Faults (13) Apply Faults filter
- Assays and Methods (10) Apply Assays and Methods filter
- Maintenance and Service (10) Apply Maintenance and Service filter
- Enzyme delivery (4) Apply Enzyme delivery filter
- Results (4) Apply Results filter
- General fluid delivery (3) Apply General fluid delivery filter
- Consumables (2) Apply Consumables filter
- Filtration (1) Apply Filtration filter
- Instrument (1) Apply Instrument filter
My sample is not mixing well in one or all of my bags. How can I improve the mixing?
My sample is not mixing well in one or all of my bags. How can I improve the mixing?
If sample is mixing poorly at one or a few positions, the mixing pads may not be making good contact with the bag and paddle behind it. Refer to TDF Service Procedure TS010.
If sample is mixing poorly in general, an addition of flow control valves on the inrush and exhaust of nitrogen at the mixer piston will help. These flow control valves are accessible from the rear of the instrument and can provide better mixing control. Refer to TDF Service Procedure TS030. Also see link to part TDF113 Mixer Flow Control Valve Assembly.
Nitrogen - what are the specifications?
Nitrogen - what are the specifications?
Do NOT run this instrument without an adequate DRY Nitrogen Supply. The instrument is powered by pneumatics that are not compatible with moisture, commonly found in compressed air. Nitrogen is also recommended as an extra precaution when handling ethanol. For these reasons Compressed Air is NOT recommended.
Nitrogen Amount
A typical TDF run requires approx. 1400L (50cu.ft.) nitrogen gas. The nitrogen supply should be 6.9 bar (100 psi). During the run, the nitrogen is used to operate pressure cylinders and also to facilitate bag filtering. During the filtering stage, the nitrogen is regulated to .3 bar (4 psi) and flow rate is approx. 15L/min (.5cu.ft.).
Nitrogen Purity
A key issue associated with the gas used in the TDF instrument is moisture content. The TDF instrument can suffer damage if moisture is introduced through the gas line. ANKOM recommends the use of nitrogen with a 99.998% purity rating. Theoretically, less pure nitrogen should work if the impurities do NOT include moisture.
Nitrogen Source
We recommend the nitrogen source be at 80-100 psi regulated back to 50 psi at the high-pressure regulator. During rinses and filtration, the ANKOMTDF instrument uses at most 20 liters/minute. This is for a short duration. For most of the length of an assay nitrogen is used only for actuating the pneumatic pistons. We do not recommend or sell a specific nitrogen generator. However, one can be used if it meets the specifications noted in this FAQ.
How much bench space does the ANKOM TDF Dietary Fiber Analyzer require and how much does it weigh?
How much bench space does the ANKOM TDF Dietary Fiber Analyzer require and how much does it weigh?
For shipment, some parts are removed and the dimensions are: 107 cm long (42") x 51 cm deep (20") x 76 cm high (30").
The TDF instrument alone weighs about 56 Kgs (123 lbs). With the attachments and other spare parts the weight is about 60 kgs (132 lbs). A rinse stand adds 1.8 kgs (4 lbs) to the shipping weight. Including the pallet & box, when the order includes a rinse stand, the total weight for shipping purposes is 85 kgs (186 lbs).