Controller Operation
Secondary Menu 9
9-9
Table 9-1. Program Mode Setting Actions
Function Action
1 up-stop
2 up-down-stop
3 up-repeat
4 up-down-repeat
Pf=1 Program mode
Use the “UP” or “DOWN” buttons to change the mode.
Pf=4 New mode
Press “SET” to continue.
S
Enter program menu
Program Control
The final parameter in the program menu is the control parameter. Three options are
available for controlling the ramp and soak program. The options are to start the program
from the beginning, (GO), continue the program from where it was when it was stopped
(Cont), or stop the program (OFF).
Pr=OFF Program presently off
Use the “UP” or “DOWN” buttons to change the status.
Pr=Cont Start cycle from beginning
Press “SET” to activate the new program control command and return to the temperature
display.
S
Activate new command
Secondary Menu
Functions, which are used less often, are accessed within the secondary menu. The
secondary menu is accessed by pressing “SET” and “EXIT” simultaneously and then
releasing. The first function in the secondary menu is the heater power display.
Heater Power
The temperature controller controls the temperature of the bath by pulsing the heater on
and off. The total power being applied to the heater is determined by the duty cycle or the
ratio of heater on time to the pulse cycle time. This value may be estimated by watching
the red/green control indicator light or read directly from the digital display. By knowing
the amount of heating the user can tell if the bath is heating up to the set-point, cooling
down, or controlling at a constant temperature. Monitoring the percent heater power lets
the user know the stability of the bath temperature. With good control stability the
percent heating power should not fluctuate more than ±1% within one minute.
The heater power display is accessed in the secondary menu. Press “SET” and “EXIT”
simultaneously and release. The heater power is displayed as a percentage of full power.
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