Appendix A
Quick Guides for Using the DG-700 with Energy Conservatory Test Devices
Cruise Overview
Cruise Control uses the DG-700’s fan control feature to continuously adjust the Blower Door or Duct Blaster fan to
maintain a constant Cruise target pressure on
Channel A
of the gauge. Cruise Control can be used in the following gauge
Modes to maintain the listed target pressures:
Before starting Cruise, the Blower Door or Duct Blaster and DG-700 should be completely set-up (including tubing
connections), the gauge should be in the Mode you wish to use, and the correct Device and Configuration settings should
be entered. If you wish to Cruise with a baseline pressure adjustment applied to
Channel A
, simply use the Baseline
feature first before beginning Cruise. You will also need to install the fan control cable and turn the fan speed controller to
the “just on” position:
Model 3 Blower Door “just on” - from the off position, turn the controller knob clockwise only until you feel the
click and no farther - the fan will not be turning.
Duct Blaster “just on” – turn the controller knob all the way down (counter-clockwise) and flip the on/off switch
to “ON” – the fan will not be turning.
Begin Cruise
button:
When you are ready to begin Cruise, press
Begin Cruise
to enter Cruise setup. A Cruise target
pressure will appear in the
Channel A
display and the Cruise icon will flash. The flashing Cruise icon indicates that the
gauge is ready to begin Cruising but is not yet controlling the fan. If you are in the
PR/ FL
or
PR/ PR
modes, you may
change the Cruise target pressure at this point by pressing the
Cruise Target
button.
Note:
You can not change the Cruise
target pressure when in the
PR/ FL @50
and
PR/ FL
@25
modes.
Start Fan
button:
Press
Start Fan
to instruct the DG-700 to begin ramping up the fan to achieve the target pressure on
Channel A
. The fan will slowly start increasing speed until the pressure reading on
Channel A
matches the Cruise target
pressure. The fan will simply run at full speed if the target pressure can not be achieved. Whenever the DG-700 is calling
for full fan speed, the gauge will emit a beeping sound.
Stop Fan
button:
Press
Stop Fan
to turn off the fan when you are done Cruising. When the fan is turned off by pressing
Stop Fan
, the DG-700 returns to the Cruise setup state (i.e. the Cruise icon is flashing and a Cruise target pressure is
displayed on
Channel A
). You may re-start Cruise again by pressing
Start Fan
, or exit the Cruise feature altogether by
pressing the
CLEAR
button.
The fan will also be stopped while Cruising under the following circumstances:
-
If
Channel A
registers a pressure of 100 Pa or more, the fan will automatically be shut down and the gauge will
revert back to the Cruise setup state.
-
Pressing the
HOLD
button will shut down the fan and freeze the display. Pressing
Start Fan
from a display
freeze will re-start Cruise. Pressing the
HOLD
button a second time from a display freeze will return the gauge
to the Cruise setup state.
-
The DG-700’s auto-off feature will shut down the gauge and turn off the fan after 2 hours of run-time (if no
buttons are pressed during that time).
Cruising Zero (+0 and -0)
Cruising Zero is designed for specialized testing and research applications. Cruising Zero is useful if you want to control
the Blower Door fan to remove an existing pressure from a building , duct system or other enclosure. When using the fan
to pressurize a space (that is currently depressurized) use +0 as your Cruise target pressure. When using the fan to
depressurize a space (that is currently pressurized), use –0 as the Cruise target pressure. Refer to specific test procedures
for more information on using Cruise Zero.
Gauge Mode
Cruise Target Pressures Available
PR/ FL @50
50 Pa
PR/ FL @25
25 Pa
PR/ FL
75 Pa, 50 Pa, 25 Pa, +0, -0
PR/ PR
75 Pa, 50 Pa, 25 Pa, +0, -0
37
Operating Instructions
for the DG700
Содержание DG-700
Страница 1: ...Operating Instructions for the DG 700 Pressure and Flow Gauge...
Страница 2: ......
