Retrotech DM-2A - Manual (Page 25)

Retrotec Energy Innovations, Ltd.
17
DM-2A Mark II 2008-02-22
To cancel an incorrectly entered value, press the e
xit
keypad button. Any values you
entered will not be applied.
For more information on selecting the configuration options available to each of the available
modes, see Choosing Custom Configuration Options in Section 5, Using Advanced Configurations.
@-mode Extrapolation Slope (n)
This option enables you to define the slope of the line along which @-mode extrapolations
will be calculated. Generally speaking, houses use a value of 0.65 and duct-work uses a value of
0.60. Acceptable values are 0.5 to 1.0. When enabled, the @-mode feature enables you to predict
what your parameter would be at a given pressure, without the need to physically reach that
pressure. For example, you can the @-mode feature to predict the flow that would be required
to pressurize a building to 50 Pa, even if the equipment in use is only capable of achieving a
pressure of 35 Pa.
Automatic Power Down
The Power Down feature (shown next) is designed to maximize battery power by enabling your
DM-2A mark II gauge to automatically turn itself off when it has been inactive for set time period.
This feature is set in hours within a range between 0 and 255 hours. Applying a 0 value will
disable the Power Down feature, meaning the DM-2 will never automatically shut down.
DM-2A Mark II Dual-Channel Pressure Gauge User Manual
2:
Working with the Setup Screen