Grant Instruments CS200G User Manual
Page 7
OLS200, CSG200
15214 Ver 9 - January 2010 57U
Operating Manual
Page 6
www.grant.co.uk
3.1.3
Shaking
Switch on shaking. In linear motion the number of strokes/minute is double the number displayed.
To set the required revolutions per minute, turn the shaking/min knob until the required speed is
displayed. The speed rises slowly to the set value. Following adjustment, the setting should be
checked after several minutes. Stroke length for linear movement
The stroke length in linear motion can be altered according to your requirement with a choice of
three settings. The setting can be changed by altering the position of the drive arm pin in the drive
magnet (see figure 1). Hole
‘A’ sets the stroke length at 18mm; there are three alternative
positions of hole ‘A’, any of them may be used. Hole 'B' sets the stroke length at 28 mm and Hole
'C' sets the stroke length at 36 mm. See figure 1 for identification of holes.
Orbital motion operates ONLY at 9mm radius.
Maximum speed
The maximum speed depends on number and size of flasks, liquid depth, operating temperature
and, in linear motion, stroke length. The maximum speed will need to be determined for each
individual application. To determine the maximum speed, increase the speed until the trolley
begins to move erratically or stop; switch the shaking off, turn the speed down and restart. By
repeating this procedure the speed can be fine tuned to a maximum point, just below the point at
which it de-latches. The shaking trolley is driven by a drive magnet coupled to a rotating magnet
below the tank; as the speed is increased a point is reached where the magnetic coupling de-
latches, causing the trolley either to move erratically or to stop.
Liquid depth
Maximum speed is achievable with the minimum liquid depth.
Liquid depths up to a maximum of 130mm (90mm flask immersion) can be used, but water may
splash out at high speeds, particularly with a small number of large vessels.
Flasks, stroke length
The following table gives a guide to the maximum speeds obtainable with 50mm immersion
depth, three different stroke lengths and various sizes and numbers of Erlenmeyer flasks.
Flask
size ml
No. flasks
Linear
18mm stroke
Hole ‘A’
Max. speed
strokes/min
Linear
28mm stroke
Hole ‘B’
Max. speed
strokes/min
Linear
36mm stroke
Hol
e ‘C’
Max. speed
strokes/min
Orbital
Hole 'A'
Max. speed
rpm
1000
1
300
270
180
160
3
220
200
170
130
500
1
340
220
200
190
6
260
170
120
135
250
1
380
270
180
200
11
280
200
140
145
100
1
200
18
145
50
1
360
300
170
200
28
260
200
140
150