• To zero the manometer, press and
hold the DIF ZERO button for 4
seconds.
• The display will show ‘8888’ to
indicate that the Zero function
has occurred.
DISPOSAL
CAUTION:
This symbol indicates that equipment
and its accessories shall be subject to separate collection
and correct disposal.
FCC/IC INFORMATION
FCC STATEMENT
This equipment has been tested and found to comply with
the limits for a Class B digital device,
pursuant to part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful
interference in a residential installation.
This equipment generates, uses and can radiate radio
frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful
interference to radio communications. However, there
is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be
determined by turning the equipment off and on, the user
is encouraged to try to correct the interference by one or
more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment
and receiver.
• Connect the equipment into an outlet on a circuit
different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV
technician for help.
This equipment complies with FCC RSS102 radiation
exposure limits set forth for an uncontrolled environment.
FCC NOTICE
This device complies with Part 15 of the FCC rules and
Industry Canada license-exempt RSS 247. Operation is
subject to the following two conditions: (1) This device may
not cause harmful interference; and (2) this device must
accept any interference received, including interference
that may cause undesired operation.
FCC CAUTION
The device must not be co-located or operated in
conjunction with any other antenna or transmitter.
Caution the user that changes or modifications not
expressly approved by the party responsible for
compliance could void the user’s authority to operate
the equipment.
CLEANING
Periodically clean your meter’s case using a damp cloth. DO NOT
use abrasive, flammable liquids, cleaning solvents, or strong
detergents as they may damage the finish, impair safety, or affect
the reliability of the structural components.
Keep pressure ports clean and free of grease and other deposits;
clean with a moist cloth as required.
STORAGE
Remove the battery when instrument is not in use for a prolonged
period of time. Do not expose to high temperatures or humidity.
After a period of storage in extreme conditions exceeding the
limits mentioned in the General Specifications section, allow the
instrument to return to normal operating conditions before using it.
OPERATING INSTRUCTIONS
A.
DIFFERENTIAL PRESSURE
• Press DIF ZERO button to start Differential Pressure test.
• Press to DIF ZERO button stop Differential pressure test.
B. ZERO
I. EM720 TEST SOURCES
C. HOLD
• Press HOLD BACKLIGHT button to hold pressure
reading on display.
• Press to HOLD BACKLIGHT button again to return to
live readings on display.
D. BACKLIGHT
• Press HOLD BACKLIGHT button and hold to turn on
display back light.
• Press HOLD BACKLIGHT button and hold to turn off
display back light.
NOTE:
Backlight has a 60 second duration.
E. RECORD/MAX/MIN/AVERAGE
• Press REC/MAX/MIN button to record the
Minimum pressure, the Maximum pressure, and
Average pressure
• Press REC/MAX/MIN button again to view Maximum
value captured
• Press REC/MAX/MIN button again to view Minimum
value captured
• Press REC/MAX/MIN button again to view Timed
mean average calculated
• Press and hold the REC MAX/MIN button to exit.
WARNING
Maximum over pressure for this meter is 10 psi
F. UNITS
• To change the measuring unit
• Press UNITS button to change the selected unit
• PRESS UNITS button again to scroll to the desired unit
• Once the measuring unit is selected, it will remain until
another unit is selected.
• Unit options:
• When the battery indicator its low.
• Loosen the screws;captive screws are used to
insure screws do not get lost, (Phillips-head screws)
• Remove battery cover.
• Replaced the batteries (3) AA batteries
• Replace battery cover, tighten screws.
G. PRESSURE TEST
• Left Port: negative pressure port, applying pressure on
this port will display a negative pressure.
• Right Port: positive pressure port: applying pressure on
this port will display a positive pressure.
• Use either port to a single source, by venting the other
port into the atmosphere.
• The manometer will continually provide a
pressure reading.
• Connect hoses to both ports from source for
differential pressure mode.
• Press DIF ZERO button to toggle Differential
Pressure on and off.
• Press = DIF/Differential Pressure
• Press = HOLD
• Press and hold = Backlight
• Press x 1 = REC
• Press x 2 = MAX
• Press x 3 = MIN
• Press x 4 = AVG
- bar
- mbar
- psi
- inHg
- Pa/kPa
- ozin
2
- kgcm
2
- inH
2
O
- ftH
2
O
- cmH
2
O
- mmHg
PRESSURE CONVERSIONS
Multiply
By
To Get
In. of H
2
O
0.002490891
bar
In. of H
2
O
0.577886661
ozin
2
In. of H
2
O
0.036127441
psi
In. of H
2
O
0.073555975
InHg
In. of H
2
O
2.490890781
mbar
In. of H
2
O
1.868321732
mmHg
In. of H
2
O
249.0890781
Pa
In. of H
2
O
0.249089078
kPa
In. of H
2
O
0.002540709
kgcm
2
In. of H
2
O
0.083320297
ftH
2
O
In. of H
2
O
2.538217706
cmH
2
O
A
B
C
E
F
G
H
D
J. BATTERY REPLACEMENT
A. Positive Pressure Input
B. Negative Pressure Input
C. Return Plenum
D. Gas Value
E. Pressure Switch
F. Inducer
G. Evaporator Coil
H. Supply Plenum
A
B
NOTE:
Prior to use the Manometer must be zeroed. To do this,
ensure the Manometer is in a non-pressurized area and no
hoses are connected. The Manometer has a 10 second count
down upon powering on.
