Humboldt H-3185B Rapid, Freeze Thaw Cabinet - Manual (Page 8)

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4.1.2 Standby Mode
1) To change to Standby mode, follow step 1 in section 4.1 for changing
the operational mode.
2) When the red display reads “CtrL”, press one of the arrow buttons until the
green display reads “Stby” (Figure 6).
3) Follow step 3 in section 4.1 to return to the temperature readings and
begin the operation. The red display will alternate back and forth from the
temperature reading to the word “stby” (Figure 7)
Note: When in Standby mode operation, the controller will be put on standby
and heating and cooling functions of the machine will be shut off.
4.1.3 Ramp/Soak Cycle Mode
1) To change to Standby mode, follow step 1 in section 4.1 for changing
the operational mode.
2) When the red display reads “CtrL”, press one of the arrow buttons until the
green display reads “r.s” (Figure 8).
3) Follow step 3 in section 4.1 to return to the temperature readings and begin
the operation. The red display will switch back and forth from the
temperature reading to the word “rS.r1” when it begins the cycle.
Note: When in Ramp/Soak mode, the controller will
begin to cycle as it is programmed and the machine
will begin the freeze/thaw cycle as called out in
ASTM C 666. The controller allows for up to 100
cycles in this mode. The controller is set up to cycle
down to 0°F and then up to 40°F for a total of 36
cycles. When the last cycle has been completed, the
controller will automatically go to standby mode.