Malvern Instruments Mastersizer X, Manual

Page: 58 / 102

The maximum number of characters in the surfactant name is 25.
Surfactant Quantity
The surfactant quantity defines the number of drops of surfactant to be added to
the sample dispersion. The user is only prompted for this value if a surfactant
name has been entered.
The maximum number of drops allowed is 99.
Surfactant concentration
The surfactant concentration defines the percentage concentration of the
surfactant used in the sample dispersion. Whole number percentages are expected.
The user is only prompted for this value if a surfactant name has been entered.
The maximum percentage value expected is 99%.
Ultrasound duration
If the sample requires ultrasonication prior to the measurement, the user is
prompted to apply the ultrasound before the sample is placed in the dispersion
unit. The user is expected to define a value in seconds less than 999 seconds.
Pause Time
The pause time defines the delay between the inspect and the measurement stages
of the measurement. This pause time is introduced to allow the sample dispersion
to settle down and a steady obscuration value be produced.
The maximum permitted pause duration is 99 seconds.
Min Obscuration
The minimum obscuration value defines the minimum expected obscuration
during the inspect phase of the measurement. If the obscuration value has settled
to a constant value but the minimum obscuration limit has not been reached, the
user is prompted to add more sample to the dispersion or accept the current
obscuration.
The maximum value accepted for the minimum obscuration is 99% but 15% is
the normal expected maximum value.
C H A P T E R 7
Q S S m a l l V o l u m e S a m p l e D i s p e r s i o n U n i t
P a g e 7 . 4
M A N 0 1 6 1