prepASH Operating Instructions
Precisa
Ref01.i
20
Labelling of the buttons
t = Time interval
Duration of the program step
Blue Flag
Blue flags
are used to select the program steps at the end of which the weights are accessible for
residue calculation. Up to 3 flags can be set (the original weight is available and does not have to be
additionally marked). The weight is normally marked after the end of drying and ashing.
AS = Auto stop
The program step is ended early once all the samples have reached the selected constant weight
(weight [mg] per unit of time [min, 30 min, 60 min]).
Stop
At the end of the step the program is interrupted and the hood is opened as soon as the chosen
temperature has been arrived (see 7.3 Events on completion of the program). The sample disk can be
taken out of prepASH and ashing addives given to the sample. Press "continue" to continue the
program. The hood is closed automatically.
Gas
Three gas connections (air, nitrogen, oxygen) enable the atmosphere to be set during the program
sequence. The possible gas flow rates are 0, 3, 6 or 9 l/min.
T = Temperature
Temperature [°C] at the end of the program step. This is achieved by a linear temperature gradient,
starting from the end temperature of the previous program step, lasting the duration of the program
step.
