TEC DG-700 - DG-700 Pressure;Air Handler Flow Mode; Pressure;AH Flow Mode Summary; Pressure;AH Flow Mode Operation; Selecting Test Device and Configuration for AH Flow

Chapter 1 Feature Summary
 1.1.f Specialized @ 50 and @ 25 Leakage Measurement Mode:
- For one-point airtightness tests of building and duct systems, the DG-700 will display on Channel B estimated
leakage rates adjusted to either 50 Pascals or 25 Pascals of test pressure.
- Choice of leakage units (CFM @, m
3
/hr @ , l/s @, sq. inches @ , sq. centimeters @).

1.1.g Specialized Air Handler Flow Measurement Mode:
- Designed for measuring air handler flow rates using a TrueFlow Air Handler Flow Meter or a Duct Blaster fan.
- Automatically adjusts displayed air flow rate using measured system operating pressures (NSOP and TFSOP).
- Choice of air flow units (cfm, m
3
/hr, l/s).

1.1.h Automated Blower Door Testing, Cruise Control and Data Logging:
- The DG-700 can be used along with a computer and specialized TEC software (TECTITE, TECTITE Express
or TECLOG2) to conduct fully automated Blower Door tests.
- The Cruise Control feature allows you to automatically control a Blower Door or Duct Blaster fan to maintain a
constant 75Pa, 50 Pa, 25 Pa or 0 Pa building pressure without having the gauge connected to a computer.
- Both of the DG-700’s pressure channel readings can be recorded using TEC’s TECLOG2 data logging software.
1.2 Overview of Gauge Operating Modes
Mode
Application
Channel A Display
Channel B Display
Pressure/Pressure
(PR/ PR)
Multi-purpose pressure
measurements.
Pressure in units chosen
(Pa, in w.c.).
Pressure in units chosen
(Pa, in w.c.).
Pressure/Flow
(PR/ FL)
Multi-purpose pressure
and air flow
measurements.
Pressure in Pascals.
Nominal (unadjusted) air flow from the
selected Energy Conservatory test
device, in units chosen (CFM, m
3
/h, l/s).
Pressure/Flow @ 50 Pa
(PR/ FL@50)
Specialized mode for
one-point Blower Door
building airtightness
test.
Building pressure in Pascals.
Building leakage at 50 Pascals in units
chosen (CFM@50, m
3
/h@50, l/s@50,
in
2
@50, cm
2
@50). Leakage rate is
determined by continuously adjusting
the measured air flow from the selected
Blower Door fan to a building pressure
of 50 Pascals, using the real-time
Channel A building pressure reading.
Pressure/Flow @ 25 Pa
(PR/ FL @25)
Specialized mode for
one-point total leakage
duct airtightness test.
Duct system pressure in
Pascals.
Total duct leakage at 25 Pa in units
chosen (CFM@25, m
3
/h@25, l/s@25,
in
2
@25, cm
2
@25). Leakage rate is
determined by continuously adjusting
the measured air flow from the selected
duct testing fan to a duct pressure of 25
Pascals, using the real-time Channel A
duct pressure reading.
Pressure/AH Flow
(PR/ AH)
Specialized mode for
measuring air handler
flow rates using a
TrueFlow Air Handler
Flow Meter or a Duct
Blaster fan.
Normal system operating
pressure (NSOP) and test
flow system operating
pressure (TFSOP) in Pascals.
Total air handler flow in units chosen
(CFM, m
3
/h, l/s). Air flow from the
selected Energy Conservatory test
device is continuously adjusted using
the measured NSOP and TFSOP
readings from Channel A.
Pressure/Velocity
(PR/ V)
Pressure and air
velocity measurements.
Pressure in Pascals.
Air velocity in units chosen
(FPM, m/s).
2
Operating Instructions
for the DG700