Retrotec DM-2 - Manual (Page 14)

Page 14 of 72
©Retrotec Inc. 2012
2.1.7 Setup
The [Setup] key allows access to the “Setup” Menu, where the gauge is customized.
Setup is used to enable or disable each of the various result display Modes and Devices,
to configure the units of measurement for each result Mode, and to configure other
parameters for the operation of the gauge. To navigate around the setup menu, use
the up or down arrows [
 ] and [  ] to scroll through the menu. Use the left or right arrows [  ] and
[  ] to choose between the different options. The configuration is saved in non-volatile memory so the
gauge will have the same configuration each time it is turned on.
The “Setup” menu provides access to the following settings:

Full Screen Timeout – specify the time before the screen changes to the full screen format

Restore Settings –restore the gauge to factory settings

Language – choose a language for the gauge menus and results

Battery Type – choose between rechargeable and non-rechargeable (alkaline)

Display Version Info – view the system version information

n – set the slope of the line that the gauge will use to extrapolate results, when using the
@Pressure function

Power Down Hour – set the number of hours after which the gauge will automatically turn off

Surface Area Unit – specify the units that will be used for enclosure area

Building Volume Unit – specify the units that will be used for enclosure volume

European , Separator – specify whether to use a comma in place of a period in the numbers
displayed

Sig Figs – Select one of 2.5, 3.0, or 3.5 significant figures (e.g. 1134 is displayed as 1135 for “3.5”,
1130 for “3.0”, and 1150 for “2.5”)

Device Setup – enable or disable the use of compatible devices and their associated Range
Configurations

Mode Setup – enable or disable result Modes displayed and specify the units for enabled Modes
When numerical input is required, the [Setup] key functions to input the number three, [3] .
2.1.8 Baseline
The Baseline function allows the user to measure the bias pressure, or Baseline
pressure, under the current test conditions. Once measured, the gauge will
automatically subtract the baseline pressure from all subsequently measured pressure
readings, and will display only the adjusted pressures on the screen. Some buildings
have an initial pressure imbalance between the indoors and outdoors, prior to any testing. The gauge
averages the background pressure for the duration of the acquisition period. A 60 second baseline
reading is typically enough to establish an accurate baseline measurement. If the building conditions
change during the test, the baseline should be cleared and a new measurement should be taken.
Remember, if [Exit] is pressed to stop the fan, the baseline measurement will also be cleared, and will
need to be re-taken.
To establish a baseline pressure
1. Press [Baseline] to begin acquiring the baseline or bias pressure. The gauge displays
“acquiring” and begins to sample the baseline pressure. While acquiring the pressure value,