Retrotec DM-2 - Manual (Page 17)

Page 17 of 72
©Retrotec Inc. 2012
2.1.13.2 Jog
Jog functions differently depending on whether the gauge is setting pressure or setting speed.

Enables the keypad arrows [  ] or [  ]to adjust the Set Speed or Set Pressure up or down much
like a traditional remote control.

The screen will display either "- - - - ", "Jog" or "Hold" (when in Set Speed or Set Pressure mode).

When not in Set Speed or Set Pressure mode, the DM-2 will not enter Jog mode (but Hold mode
can be activated at any time).
In Set Speed
1. Press [Jog/Hold] until "Jog" appears on screen.
2. Press [
 ] or [  ] to increase or decrease the set speed in 1% increments.
3. Press and hold [  ] or [  ] to increase or decrease the set speed in 5% increments.
4. Press [Jog/Hold] again until "----" is displayed to resume normal operation.
In Set Pressure
1. Press [Jog/Hold] until "Jog" appears on screen.
2. Press [
 ] or [  ] to increase or decrease the set pressure in increments of 5 Pa, 0.02 in WC,
or 0.105 lbs/sq ft.
3. Press and hold [  ] or [  ] to increase or decrease the set pressure in increments of 10 Pa,
0.04 in WC, or 0.21 lb/sq ft.
4. Press [Jog/Hold] again until "----" is displayed to resume normal operation.
When numerical input is required, the [Jog/Hold] key functions to input the number nine, [9] .
2.1.14 @ Pressure
The [@ Pressure] key asks the DM-2 to calculate a result that would be achieved, if the
desired test pressure were measured. The measured pressure will almost always be at
least slightly over, or under, the exact test pressure making it difficult to report results
that are standardised for a specific pressure. The [@ Pressure] function performs a calculation called
"extrapolation" which analyzes the currently measured results, and displays the results as if the exact
test pressure was achieved.
Press [@ Pressure] to toggle the gauge pressure extrapolation function on and off. The test pressure
that is being extrapolated to is configured in the Setup Menu.
Note: While the gauge is capable of extrapolating to any pressure, it is most accurate when the actual
building pressure is closer to the desired extrapolation pressure.
The @ Pressure function provides unique advantages over un-extrapolated results:

There is no need to achieve an exact test pressure.

The results on the screen will be very stable since results are extrapolated to a specific pressure.

Results can be obtained, even if the test pressure cannot be reached, as long as the pressure
actually achieved is within 10% of the desired test pressure.
In Set Speed mode