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Omniguard™ 4 Owner’s Manual
Page 33
Engineering Solutions Inc
Appendix B: Specications
Differential Pressure Range: +/-0.250” WC (+/-6.35mmWC,
+/-62.5 Pascals)
Accuracy: +/- .003” WC or +/-1% of reading whichever is greater
Resolution: 0.001” WC, (+/-0.05mm WC, +/-0.5 Pascals)
Burst Pressure: 3 psi (20 kPa) on either inlet port
Pressure Units Displayed: “WC (Inches Water Column), mmWC
(millimeters Water Column), or Pa (Pascals)
Data Storage: 512,000 characters, approximately 120+ days of
readings (over 8,000 logged events) in non-volatile memory (no
battery req’d)
Display: Graphic Liquid Crystal Display (LCD) with adjustable
backlight and over 3.5 sq. inch viewing area
Internal Clock: the internal clock is powered by a self-charging
lithium-ion battery that provides 30+ days of clock operation when
AC or DC power is not present
Printer: 20 character wide thermal printer (uses 2.2” wide thermal
printer paper)
Printing/Logging Rates:
Normal Operation -- highest and lowest pressure readings
printed/logged at intervals of 5, 15, 30 minutes or OFF
Alarm Condition -- current pressure reading printed/logged at
intervals of 15, 30, 60 or 120 seconds for first 10 minutes of
alarm condition, increasing to 15 minute intervals thereafter
Alarms: Two programmable alarm setpoints, 95db audible alarm with
flashing LED and on-screen warning indicate alarm condition
Pressure Inlets: Two 3/16” OD barbed hose connectors, 10 ft of
hose provided
USB Port: USB V1.1 Type-A
USB Port: USB V1.1 Type-B
Power: 115 VAC 60Hz with 6 ft power cord
(220 VAC 50Hz optional)
Case: Dimensions 9.25” x 7.5” x 4.5”, Shipping Weight 8 lbs., Material
is copolymer polypropylene with polycarbonate window in the lid,
handle and stainless steel hanging hook
Warranty: One Year Limited Warranty
Appendix C: Establishing a Containment Site
The Omniguard 4 monitors and records the differential pressure
between the INLET 1 port and the INLET 2 (Reference) port.
In abatement applications the Omniguard 4 should be located outside
the containment area and not in any antechambers (i.e. shower or
changing room). This allows a supervisor or hygienist to monitor
pressure readings without entering the containment area.
This section of general guidelines to establishing a containment
site is provided by Engineering Solutions Inc for informational
purposes only. Engineering Solutions Inc is not responsible for
its accuracy nor conformance with specific regulations for your
area. Engineering Solutions Inc specifically advises all users
to obtain the advice of qualified professionals for each use and
application of the Omniguard 4. Engineering Solutions Inc makes
no claims as to the proper usage or interpretation of the data
provided by the Omniguard 4.
General Guidelines to Establishing a Containment Site
1. The contractor and hygienist are to be certified prior to qualifying
to bid on an abatement job.
2. All workers are to have undergone specific training in abatement
procedures.
3. Typical abatement requirements:
a. containment area to be sealed within a double layer of
8 mil plastic or equivalent.
b. before beginning work within the containment area and at
the beginning of each shift, the containment area must be
inspected for breaches and smoke-tested for leaks, and
any leaks sealed.
c. air volume within containment must be changed 4 times
per hour, i.e. the entire air volume must be evacuated
every 15 minutes.
d. minimum pressure in containment is -0.020”WC, i.e. the
differential pressure between containment pressure and
ambient/outside pressure must be at least -0.020”WC as
measured by a manometer.
e. the containment area must be kept under negative pressure
throughout the period of its use.
f. air movement must be directed away from employees within
containment and toward a HEPA filtration unit.
g. fiber levels within the containment area must be sampled
at a specific interval and be less than a proscribed level,
i.e. sampled 1 time a day or more and fiber levels below
“5 fibers/100 fields”.
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