OPERATION OF TAP DENSITY APPARATUS

• PROCEDURE:

• Before starting the operation check for the area cleanliness and instrument cleanliness.
• Connect the pin to the power supply.
• Switch on the power.
• The instrument displays the Main Menu.
• Choose the mode menu either ‘USP or User’ by pressing Digit scroll key.
• Press the method key to set USP 1 or USP II.
• CONDITION I (If as per USP 1)
• Stroke Height: 14mm ± 2 mmStrokes/Min: Nominal 300 times
• Tap count 1 : 500 times
• Tap count 2 : 750 times
• Tap count 3 : 1250 times
• Press set key, to set tap count 1 to 500 by using Digital scroll and increase/decrease key.
• Press enter key, set tap count 2 to 750 by using Digital scroll and increase/decrease key.
• Press enter key, set tap count 3 to 1250 by using Digital scroll and increase / decrease key.
• Press enter key, set clock time using Digital scroll and increase / decrease key.
• Press enter key, set date by using shift key and increase / decrease key.
• Press enter key, it will ask for “Print last result “if you need shift cursor to Y otherwise to N.
• Press enter key.Press reset key, now your method get saved as per USP 1.
• Press start key, input weight of sample by using shift key and increase / decrease key in grams.
• Press enter key, input initial volume (Vo) by using shift key and increase / decrease key in ml.
• Keep the cylinder in Holder and press start key; it will give a taps for 500 times.
• Measured tapped volume (Va) and input by using shift key and increase / decrease key.
• Press enter key and press start key. It will give a taps for 750 times.
• Measured tapped volume (Vb) input by using shift key and increase / decrease key.

• Note: If the difference volume of 1 st tap and 2 nd tap i.e. Va – Vb is more than 2% then proceed for tap count 3 i.e. 1250 times by same manner. Measure the final volume (Vf)

• If the difference volume is not more than 2% stop the experiment in Tap count 2 only.
• Give the connection to printer and go to printing mode by using SET and Enter Key.
• Set printing mode to Y, automatically printing will come.
• We can get tap density Initial Density, compressibility Index and Hausner Ratio.

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• CONDITION II (if as per USP II):
• Stroke height: 3mm+/-10 %
• Strokes/min: Nominal 250 times
• Tap count 1: 500 times
• Tap count 2: 750 times
• Tap count 3: 1250 times
• Proceed same as for condition 1.
• CONDITION III (if as per user mode):
• Set the mode to ‘User’ by using digital scroll keys.
• Press set key, set taps count as per the product specification.
• Press start key to start the tapping.
• Measured the volume and calculate manually.
• Calculate the bulk density of the sample according to the formula given below.

• Switch off the instrument after usage.
• Enter the details of usage in the logbook.

• ANNEXURES: 

Annexure-I

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