OM0232
|
Rev 7 July/2017
Page 36 of 56
NuAire, Inc.
|
2100 Fernbrook Lane
|
Plymouth, MN 55447
|
U.S.A
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ph: 763.553.1270
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fx: 763.553.0459
|
tf: 800.328.3352
|
www.nuaire.com
7.2 Unbalancing sensitivity detection
The centrifuge has a reaction to the load balancing faults which may be different depending on the media on which the
centrifuge is placed. A calibration of the imbalance sensitivity is therefore necessary during installation.
Required equipment:
Use the reference balancing kit AFI-71122002.
Access the unbalance sensitivity calibration menu.
Equip a rotor swing-out and its 4 nacelles in the
centrifuge.
Remove the inserts of the nacelles.
Low threshold
1.
Place the round 15 gram weight in one of the
nacelles and close the lid,
2.
Press the button “15gr”
3.
The rotor accelerates until it stabilizes.
4.
The centrifuge shakes, then the rotor slows down.
5.
The low threshold is then determined. It appears
under the button “15 gr”. (e.g. 480)
6.
Open the lid and remove the 15 gram weight.
High threshold
7.
Place the 25 gram weight in the same nacelle.
8.
Proceed in the same way as for the 15 gram weight.
9.
The low threshold is then determined. (e.g. “520”)
10.
Open the lid and remove the 25 gram weight.
Average
11.
Press on the Next button to average the setting.
(e.g. [480+520]/2 = 500 )
The average value is displayed.
By default, the factory setting value is 500.
Check
The following steps are compulsory.
High threshold:
Do not adjust this threshold with a weight
greater than 25 gr.
This would cause a breach of warranty.
The appliance has been dimensioned for a
maximum threshold of 25gr.
12.
Place the 15 gr + 10 gr weights in a nacelle.
13.
Start the cycle. 2000 rpm / 1 minute / 9
Acceleration / Braking 9
14.
The centrifuge must stop during the acceleration,
and display the message ERROR1:
The 25 gr imbalance is not tolerated.
Repeat the High threshold check 3 times: ERROR1
must appear each time.
Low threshold:
15.
Leave only a weight of 15 gr in a nacelle.
16.
Start the cycle. 2000 rpm / 1 minute /
9 Acceleration / Braking 9
17.
The centrifuge should achieve the desired speed
and then slow down and stop without the following
error message appearing:
The 15 gr imbalance must be tolerated.
Repeat the Low threshold check 3 times: Each cycle
should take place normally.
