Humboldt H-3185B CONTROLLER User Manual
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© 2008 Humboldt Manufacturing
5.6 Setting Ramp Times
1. Continuing from section 5.5, while the green display is alternating between
“PFrE” and the set option as in the previous section, continue pressing the Mode
button
until the green display reads “rt1” (Figure 15). The display will
alternate between “rt1” and the ramp time value (in minutes) for the first ramp in
the cycle. It is capable of 8 ramp operations in the cycle. This is the first ramp
time setting. The soak time and temperature for the first ramp must be
programmed or skipped before going to the next ramp time setting. It is preset to
5 minutes.
Figure 15
2. To change the ramp time, press the up or down arrow button
until
the desired ramp time is achieved.
Note: Due to the thermal behavior of the Freeze/Thaw machine and the response
of the sample material, it is not recommended that this setting be increased as this