Chapter 1
Feature Summary
Chapter 1 Feature Summary
The DG-700 Pressure and Flow Gauge is a multi-functional differential pressure gauge with 2 independent
measurement channels. In addition to providing high resolution pressure measurements, the DG-700 is programmed
to operate with other Energy Conservatory test devices to provide air flow measurements during building
performance test procedures. The DG-700’s dual pressure channels and air flow measurement features make it
ideally suited for a wide range of building performance testing applications including:
Blower Door airtightness testing.
Duct system airtightness testing.
Air handler flow measurements.
Exhaust fan flow measurements.
Building depressurization and combustion safety testing.
1.1 Feature List
1.1.a Pressure Measurements:
-
Simultaneous display of 2 independent differential pressure channels (
A
and
B
).
-
Each pressure channel has a range of –1,250 Pascals to +1,250 Pascals.
-
Accuracy of pressure channels is +/- 1% of reading, or 2 times the resolution, whichever is greater.
-
Auto ranging with 0.1 Pascal resolution.
-
Choice of pressure units (Pascals or Inches w.c.).
-
Specialized “
Baseline
” feature on
Channel A
allows user to measure and record a baseline pressure reading,
and then display the baseline adjusted pressure reading.
1.1.b Auto Zeroing:
-
Auto-zeroing feature for both measurement channels automatically adjusts for sensitivity to position and
operating temperature during operation (automatically activated every 10 seconds).
1.1.c Time Averaging:
-
Choice of 4 time-averaging options (1 second, 5 second, 10 second and Long-Term average). The time-
averaging feature stabilizes readings when measuring fluctuating signals (e.g. windy conditions).
1.1.d Air Flow and Velocity Measurements:
-
The DG-700 will calculate and display air flow readings on
Channel B
for the following Energy Conservatory
test devices: (choice of units - cubic feet per minute (CFM), meters
3
per hour (m
3
/hr), liters per second (l/s))
Model 3 Minneapolis Blower Door™ fans (110V and 220V).
Model 4 Minneapolis Blower Door fans (220V).
Series A and B Minneapolis Duct Blaster® fans.
Exhaust Fan Flow Meter.
TrueFlow® Air Handler Flow Meter.
-
The DG-700 will calculate and display air velocity readings on
Channel B
from a standard pitot tube. (choice of
units – feet per minute (FPM), meters per second (m/s))
1.1.e Display “HOLD”:
When the “
HOLD
” button is pushed, the DG-700 display is temporarily frozen with the most recent readings and
settings. The Hold feature is turned off by pushing the “
HOLD
” button a second time.
1
Operating Instructions
for the DG700
