CP : control panel, FC : frequency converter, SB : supply board, CB : cooling board, CC : control cable, LL : lid locking, BC : braking chopper,
BR : brake resistor, MR : mains reset, EC : error cause, ES : error consequence, ER : error remedy, M : measurements, ECR : error-code reset
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7. Functional check
7.1. Functional check at factory
Following accessories are required to perform the functional check:
• Testing rotor
• Two reaction receptacles filled with water
Table 7 lists measured values, and, ranges of measured values, which have been laid
down for these accessories.
In the final check, the functional efficiency of each centrifuge is verified, with the meas-
ured values and ranges of measured values being taken into account.
Table 7
Measurements carried out on the centrifuges at the factory MIKRO 22
MIKRO 22 R
with testing rotor 1153
load: two reaction receptacles 1.5 ml
reaction receptacles filled with Water
Measuring instruments used in final check
Temperature measuring instrument THERM 2250-1 X
Moving-iron current measuring instrument
X
Moving-coil current measuring instrument
X
Rated speed n
max
RPM 14000
Slippage at n
max
RPM 100 – 400
Starting current up to n
max
A 7.0 - 7.7
A
Rated current up to n
max
A 2.0 - 2.7
A
Total current with cooling
A
≤ 3.0
A
Starting time Stage 9 up to n
max
sec 9 – 13
Rundown time Stage 9 from n
max
sec 14 – 18
Starting time Stage 5 up to RPM 4000 sec 20 – 25
Rundown time Stage 5 from RPM 4000 sec 23 – 28
Imbalance Run through at g
≤ 2
Switch off at g
≥ 7
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