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3 DM-2 Keypad Functions

The DM-2 Keypad has 14 keys which control all of the DM-2 functions.

On/Off (Backlight)

The On/Off (Backlight) key turns the gauge on and off, and allows the user to turn on

the backlight, or preserve battery life and turn it off.

Press [On/Off] to turn the DM-2 on. The key needs to be held down for two seconds to

turn the gauge off. The DM-2 is equipped with a backlight to improve visibility. The backlight turns on

for a brief time when any key is pressed. When the DM-2 is on, pressing [On/Off] briefly will turn the

backlight on permanently. Pressing it quickly again will turn the backlight off.

Exit

The Exit key allows the user to exit from certain screens, stop the fan, and clear entries.

Press [Exit] after turning the gauge on, in order to clear the splash screen. When in a

Setup Menu, press [Exit] to back out of the current menu screen, or to cancel a menu

selection. While in Set Pressure or Set Speed mode, press [Exit] to immediately turn off the fan (the fan

can also be stopped by setting the speed to zero). Pressing [Exit] at any time while in the main screen

will cancel the Baseline as well.

Enter (Volume/Area)

Enter is a multi-application key that applies to several functions. Press [Enter] to select

menu items, or to save input values. Depending on the Mode in use, a volume or area

value may be required (Volume for Air Changes per hour, Area for any of the “per

Area” results). Press [Enter] while the volume or area result is selected, to activate data entry for

volume or area. Enter the appropriate value and press [Enter] again to save.

Device

Device refers to the fan or pressure measuring device being used to conduct the

current test. It is important to make sure that the correct device is selected; the

calculations for each of the results are based on system flow equations that are

different for each device.

Press [Device] to switch between the devices that have been enabled on the DM-2. Only the devices

that have been enabled in the Setup Menu can be selected with the Device key. The currently selected

device is displayed on the bottom right corner of the screen. The devices that can be selected for use

with the DM-2 are listed in Table 4.

When numerical input is required, the Device key is used to input the number zero.

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Retrotec DM-2A Manual de usuario Pagina 16