pg. 28 Rev 9/20/18
21. Manually measure pH.
One of the questions you are asked before starting the automated procedure is: “Check pH manually?” If you answered
“Yes” to this question, the instrument will stop after adding the required HCl, open Clamp Bar A, display the screen
below, and make a sound to remind you to manually measure pH and adjust to 4.0 - 4.7 if necessary.
When measuring pH, use a probe that can be easily rinsed (with Distilled Water) to
avoid loss of sample. If you add 0.5N HCl or base to adjust the pH, you must mix
the solution in order to get an accurate pH reading. To manually mix the solution,
press the outside of the bag with your fingers just above Clamp Bar B multiple
times.
When you have completed the pH measurement process, press the Continue button on the Status screen. You will see
“COMPLETE” next to “pH required?” in the upper left corner of the screen.
22. Rinse the IDF filter bags with acetone.
After the instrument has completed an IDF process the IDF residue that has been collected in the IDF bag must be
manually rinsed twice with acetone. It is recommended that you use an ANKOM TDF51 Rinse Stand (sold separately) for
rinsing filter bags with acetone.
To rinse the IDF filter bags with acetone using the ANKOM TDF51 Rinse Stand, follow the steps below.
22.1 Remove the IDF bags from the instrument.
22.2 Place the bags on the Rinse Stand by sliding the back part of each bag under the
pinch mechanism. Keep the top of the bag open.
22.3 Using a wash bottle, squirt acetone completely around the inside polypropylene
surfaces of each bag, making sure that all residue on the surfaces is rinsed down
into the filter.
22.4 Repeat step 22.3 so that each bag gets rinsed a total of two times.
22.5 Allow acetone to evaporate from the bags.
Hazardous Materials – Do NOT heat seal or place bags in an oven until all
acetone has evaporated.
Vacuum xx.x
cur: - x.x
max: - x.x
Check pH
then press continue
xx:xx:xx
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