Yamato Scientific Hitech controller type Ⅳ - Manual (Page 7)

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2. INPUTTING, EDITION AND DELETING PROGRAMS
2.1 Program Composition
A program is a combination of segments and repeat commands, in which ramp time,
ramp level, repeat frequency, end segment and other parameters should be preset.
[Segment]
Fig 2.1 shows the concept of a segment. Temperature and time patterns of a segment
are determined by the 3 basic parameters below.
Ramp level : Desired temperature
Ramp time : Time required to achieve the preset ramp level
Soak time : Time to hold the ramp level
Fig. 2.1: Concept of A Segment
In Section (① of Fig. 2.1~ temperature varies at a fixed gradient rate toward the
desired temperature set as the ramp level. After reaching the ramp level, temperature
is kept in Section② of Fig 2.1 for the time preset as the soak time. These sections of ①
and② compose a segment.
If you want to vary the temperature in Section① on a step (for full-power increase or
decrease), instead of a faced gradient rate, set for the ramp time. Fig. 2.2
shows the pattern of a step variation of the ramp time.