Pall LevMixer DB-300, Руководство оператора

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Document #: 020-17475-00 Revision: E Page #: 33 of 63
Figure 34:
Removing filter cover Figure 35: Replacing filter membrane
O.3.8 Speed Calibration Verification:
Equipment recommended:
Test Impeller: accessory item #LT-DBAK007T equipped with piece of reflective tape
(tachometer accessory) on side surface.
Optical Tachometer: Omega HHT13 or equivalent
UNIT CONDITION: charged properly and have corresponding impeller coupled
above the levitated head. Manual Mode of operation is set.
a. Set the permanent run speed of rotation to 20 RPM.
b. Press and hold the “Start” button, rotation started. Wait until the impeller
accelerates to its nominal speed of rotation.
c. Reading from external tachometer write into the second column of Table 4.
d. Calculate and write down in the third column the difference between set
point and measured in c) speed value.
e. Compare the reading recorded in column 2 with corresponding allowable
range in the third column of the Table 4, then record the result in column 6.
f. RPM Reading from Panel screen record into the fourth column of Table 4.
g. Compare the reading recorded in column 4 with corresponding allowable
range in the column 5 of the Table 4, then record the result in column 7.
h. Repeat steps c) to g) for each of the RPM set points in the first column of
Table 4.
i. If unsuccessful, call service.