Despatch 1500 Controller Bedienungsanleitung PDF herunterladen (Seite 38)

Page 32 Despatch/Watlow 1500 Control Instruction Manual

Step Description

1 Set points of 25EC and 95% RH entered for S1 and S2. Event 1.1 is on. This

enables the humidity control system. This step is held for 10 minutes so that the

humidity system has sufficient time to fill up with water.

S1 is changed to 40EC. S2, E1 and E2 are left blank by pressing the FCTN key

when those functions are displayed. In a set point step, blank data defaults to

previous settings, so S2 = 95, E1 = 0001, and E2 = 0000. Since Step #1 was the

previous step, by doing this if you wished to change S2 to 85% throughout the

program you only have to change it on Step #1. The step duration is 30 minutes.

Since the previous set point was 25E, the process set point will be ramped continu-

ously from 25E to 40E over the 30 minute span.

3 No change in set points (S1 or S2) or events (E1 or E2). Therefore, control will act

to hold 40EC and 95% for 30 minutes.

S1 is set back to 25EC. It is ramped from 40EC over 30 minute period.

5 Again, a hold for 30 minutes.

6 S1 is changed to -10EC. This is ramped over a 1 second period so it is

essentially a step change. Note Event 1.1 is turned off. To protect the

equipment, humidity control generally needs to be disabled when below

freezing.

7 The control is set to wait for the CH-1 process to reach -8. All other waits

are blank so they will be ignored. Do not type zeros into wait functions that

are to be ignored. This is caused by pressing the ENTER key instead of the

FCTN key when you scroll past the function you wish to ignore. The above

is the most typical problem encountered in a wait-for-step.

8 Another hold for 30 minutes.

9 This is a jump to Step #2. Steps 2-8 will be repeated.

10 Set points are changed to 25EC and 60%, a normal condition, before

program is ended.

Is a blank step (SP when viewed in CHG DATA mode). Program execution

will end here.

Table 9 Despatch Sample Program

Ecosphere Sample Program

The sample program on the following page is provided to

demonstrate the function of the unit. It is pre-programmed in

the factory and available for you to run upon installation of

your chamber. If the program has been cleared somehow,

you may wish to re-enter it as programming practice.

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Despatch 1500 Controller Bedienungsanleitung Seite 38