Dwyer SMART Air Hood SAH22A Serie Instrucciones De Instalación Y Funcionamiento página 2

FEATURE OUTLINES
SAH22A Hood
Battery
compartment
Diffuser cap
Charging port
Power button
INTRODUCTION
WARNING Do not use the SAH22A for liquid or gas mixtures other than air.
No responsibility will be taken by Dwyer Instruments, Inc. for any
resulting damage to the unit or to the operator if it is used with corrosive or dangerous
or explosive gas mixtures. When using the SAH22A to check air flow at ceiling
diffusers, make certain that you can raise and hold the unit safely during use. This
instrument is not classified as flameproof or intrinsically safe; therefore, it must not be
used where an explosion hazard may exist. The unit is not authorized for use on life
support applications.
Note: Observe standard safety procedures when working on ladders and scaffolding.
Also, ensure the unit does not become caught in moving machinery or on sharp
objects.
• If stored under conditions outside normal operating range, allow
CAUTION
the unit to stabilize at room conditions before use.
• Take care when carrying the assembled unit from place to place.
• Avoid people and nearby equipment.
• Avoid objects that may damage the capture hood.
• Turn the instrument off before storage or transportation and remove the batteries if
storing for long periods of time.
• Avoid subjecting the quad flow sensing grids to excessive loading during use or
assembly. Any air flow other than through the calibrated sensing holes, such as any
hair-line cracks, will seriously affect the sensitivity.
A damaged quad flow sensing grid must be replaced. It cannot be repaired.
• Do not disassemble the quad flow sensing grids from the capture hood while
taking readings or balancing. The retaining structure is specifically designed to
accommodate loading due to normal operation.
• Under low humidity conditions, static electric charges may be encountered. These
can be avoided by applying a suitable anti-static solution.
SETUP
Battery Requirements
SAH22A Battery
WARNING
polarity symbols inside the battery bracket. Failure to do so may result in personal
Sensor module
injury or property damage. The orientation of the polarity symbols on the battery
must match the orientation of the label inside the SAH22A battery bracket (+ to +, - to
-). The positive terminal of the NCR18650B battery is also marked by a wide black
band on the battery.
A 3.6 VDC NCR18650B lithium ion battery, or the equivalent, needs to be purchased
from a local supplier and installed properly before the SAH22A is operational.
Antenna
Before beginning use with the SAH22A, it is suggested that the unit be charged
using the included charging cable. Plug the mini-USB end of the cable into the unit's
charging port and the USB end into the charging block.
Battery Backup
Four 1.5 VDC AA batteries can be used as a backup for the lithium ion battery.
Pole
mounting
plate
Detachable quad flow
sensing grid x4
Lithium Battery Status
The LED lights on the hood change color and pattern depending on the status of the
battery.
LED Location
Hood & Power Button
Hood & Power Button
Power Button
Power Button
Powering the Unit
The SMART Air Hood
batteries are installed, the unit can be powered on by pushing the power button. It
should turn green when turned on.
To turn off the hood, press and hold the power button until the LEDs turn off.
Fire Hazard While Charging Battery
Match the lithium-ion battery polarity symbols on the battery to the
LED Color/Pattern Lithium Battery Status
Red (blink) Battery is critically low
Red (on) Battery is low
Red (on) Battery is charging
Green (on) Battery is fully charged
balancing instrument does not require assembly. Once the
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