Pall Allegro MMG403, Инструкция по эксплуатации

Страница: 44 / 53

44
Cleaning and Decontamination 11.3.7.
The steel frame of the machine consists of 304 stainless steel and may be cleaned with water
and isopropyl alcohol.
NOTE: It is important to ensure the system is turned off before cleaning the device.
Speed Calibration Verification 11.3.8.
Equipment recommended:
•
Test impeller: Accessory item 4100655 equipped with piece of reflective tape (tachometer
accessory) on side surface.
•
Optical tachometer: Omega HHT13 or equivalent
The drive unit should be set to manual mode of operation. Use Table 10 to document the
calibration.
1. Set the permanent run speed of rotation to 20 RPM.
2. Press and hold the ‘start’ button, rotation started. Wait until the impeller accelerates to its
nominal speed of rotation.
3. Reading from external tachometer, write into the second column of the table.
4. Calculate the difference between set point and the value measured in 3.
5. Compare the reading recorded in column 2 with corresponding allowable range in the
third column, and then record the result in column 6.
6. RPM Reading from panel screen record into the fourth column.
7. Compare the reading recorded in column 4 with corresponding allowable range in column
5 of the table, and then record the result in column 7.
8. Repeat steps 3 to 7 for each of the RPM set points in the first column.
9. If unsuccessful, call service.
Table 10: Rotational speed calibration test measurements
1 2 3 4 5 6 7
Set
Point
(RPM)
External
Tachometer
Reading
(RPM)
External
Tachometer
reading
allowable
range
(RPM)
Panel
Tachometer
Reading
(RPM)
Panel
reading
allowable
range
(RPM)
External
Tachometer
Max
Deviation
falls within
allowable
range (Y/N)
Panel
Tachometer
Max
Deviation
falls within
allowable
range (Y/N)
20
19 - 21 19 - 21
60
59 - 61 59 - 61
100
99 - 101 99 - 101
140
138 - 142 138 - 142
180
178 - 182 178 - 182
220
218 - 222 218 - 222
260
258 - 262 258 - 262
300
298 - 302 298 - 302