Humboldt H-3185B CONTROLLER User Manual

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4.1 Changing Operational Modes

1. To change the mode of operation, press and hold the Mode button

for at

least three seconds. The red display will read “Ctrl” and the green display will

read whatever mode it is currently in.

2. Use the up or down arrow buttons

to change the setting on the

green display to show the mode desired.

3. When the desired mode is set, return to the temperature readings and begin the

operation by holding down the Mode button

again until the displays show

the actual temperature and set value readings as in Figure 4.

4.1.1 Normal Mode

1. To change to Normal mode, follow the 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 “nor” (Figure 5).