Dwyer Series SAH SMART Air Hood® Balancing Instrument
Bulletin TE-SAH
Specifications - Installation and Operating Instructions
Introduction
The SMART AIR HOOD® (SAH) Balancing Instrument is the most accurate and easy to operate air flow hood on the market today. Its low profile design allows balancers to work in occupied spaces (e.g., bathroom stalls, MRI machines, cubicles, tables/chairs) and maneuver through doorways easier. Using the included 12-foot hood pole and wireless communications to a mobile device, a single operator can balance a branch in less time than traditional balancing teams. Lighter than most traditional capture hoods, its ergonomic design reduces technician fatigue. The rugged polypropylene base hood features Quad Flow Design Technology for controlling airflow and minimizing back pressure, yielding superior measurement accuracy. The Wi-Fi protocol connects to the user's Android® or iOS® device, providing real-time feedback from up to 200 yards (183 m) away, saving technicians from repeatedly climbing ladders to adjust dampers. The SMART AIR HOOD® Application Software streamlines the air flow balancing process using Predictive Balancing, a method for predicting optimal flow set points and adjustment order.
Specifications
| Service | Air |
|---|---|
| Units | Cubic feet per minute (CFM), cubic meter per hour (M³/H), cubic meter per second (M³/S), liter per minute (l/min), liter per hour (l/hour), liter per second (l/s) |
| Volume Flow Ranges | Supply: 40 to 2000 CFM (68 to 3398 m³/h) (19 to 944 l/s); Exhaust: 80 to 2000 CFM (136 to 3398 m³/h) (38 to 944 l/s) |
| Accuracy > 40 CFM | ±3% of reading ±7 CFM (11.9 m³/hr) (3.3 l/s) |
| Resolution | 1 CFM (1.7 m³/h) (.5 l/s) |
| Power Requirements | 3.6 V NCR18650B MH12210 Li-ion rechargeable battery (included), or (4) AA alkaline 1.5 V batteries (not included) |
| Housing Material | Polypropylene |
| Weight of Hood | 5.75 lb (2.6 kg) |
| Supported Devices | UHH6 and newer, and smart devices with Android® firmware version 8.0 and above or iOS® version 14.1 and above |
| Software | SMART Air Hood® application software, available on the Google Play™ store and the App Store® |
| Wireless Protocol | Wi-Fi wireless technology |
| Response Time | 1 s |
| Compliance | CE, FCC, IC, RCM (-AU model only) |
Included with the SAH Kits:
- 3 ft (0.9 m) extendable pole
- 12 ft (3.7 m) extendable pole
- Mobile device quick release pole adaptor kit
- Two low flow plugs
- Softcase SAH22 or hardcase SAH-22HC with storage for additional instruments
- Lithium ion battery (not included in international versions)
- Installation and operating manual
- NIST traceable certificate
- Charging cables for SAH
Diagrams and Feature Outlines
Dimensions of the SAH Hood: The hood has a square base with approximate dimensions of 24.074 inches (611.48 mm) per side. The height is approximately 9.000 inches (226.28 mm). Other dimensions shown include 8.909 inches (226.28 mm), 7.103 inches (180.42 mm), 5.543 inches (140.80 mm), and 11.822 inches (300.27 mm).
SAH Hood Feature Outlines: The hood features a battery compartment, a sensor module, an antenna, a pole mounting plate, a power button, and a detachable quad flow sensing grid (x4).
Battery Requirements: The SAH uses a 3.6 V NCR18650B Li-ion rechargeable battery. A warning is provided regarding fire hazard while charging the battery and the importance of matching battery polarity symbols. A battery backup option using four AA batteries is also available. The unit has a charging port and a power button.
Lithium Battery Status: The LED lights on the hood indicate battery status. Red blinking indicates critically low battery, solid red indicates low battery, solid red on the power button indicates charging, and solid green indicates the battery is fully charged.
Operation - Connecting to Application Software: The LED lights on the hood indicate connection status with the mobile device through various blinking patterns of blue and red LEDs.
Installation - Assembling Accessories: Illustrates connecting the pole to the hood using a locking pin and the use of a stationary pole adapter. It also shows how to attach a mobile device to the pole using a locking attachment.
Placing the SMART Air Hood® Balancing Instrument on a Diffuser: Depicts placing the hood on a diffuser, ensuring a complete seal, and adjusting the pole for stability. It also shows attaching a mobile device to the pole.
Installation
Assembling Accessories
To place the hood onto a diffuser for air flow measurement, it must be mounted to one of the two provided poles. Align the hole at the end of the pole with the holes in the hood's mounting plate. Insert the provided locking pin through the holes to secure the pole. Press the button on the end of the pin to insert or remove it.
When using the short pole or the SAH adapter base kit for canvas hoods, use the stationary pole adapter to prevent the hood pole from pivoting. Place the adapter onto the SAH and attach it using the provided screws and wing nuts. Insert the short pole and secure it with the locking pin.
Operation
Connecting the SMART Air Hood® Balancing Instrument to the Smart Air Hood® Application Software
The LED lights on the hood indicate its communication status with the mobile device. The connection status is shown by the combination of blue and red LED states (e.g., 50% duty cycle blue and 50% duty cycle red means 'Not connected').
Placing the SMART Air Hood® Balancing Instrument on a Diffuser
Place the hood on the diffuser, ensuring that the hood seal completely surrounds the diffuser without any leaks. Visually inspect all sides and corners to verify a proper seal. Once the hood is correctly placed, twist the pole to adjust its length so it reaches the floor, supporting the hood. Ensure the hood is free-standing and stable. To attach a mobile device, use the provided locking attachment on the mobile device case and secure it to the pole by inserting it into the locking device and rotating it a quarter turn. The SMART Air Hood® balancing instrument is now ready for use. For shorter ceilings, it is recommended to leave the top section of the pole inserted and adjust the height using the middle section for greater stability.
FCC/Industry Canada Notice
NOTICE: This device complies with Part 15 of the FCC rules. 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.
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 equipment and receiver.
- Connect the equipment to 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.
CAUTION: Pursuant to FCC 15.21 of the FCC rules, changes or modifications not expressly approved by Dwyer Instruments, LLC may void the user's authority to operate the equipment.
NOTICE: This device complies with Industry Canada license-exempt RSS standard(s). Operation is subject to the following two conditions: 1. This device may not cause harmful interference; 2. This device must accept any interference received, including interference that may cause undesired operation of the device.
RF Notice
NOTICE: This product complies with FCC OED Bulletin 65 and Industry Canada's RSS-102 radiation exposure limits set forth for an uncontrolled environment.
NOTICE: This Class B digital apparatus complies with Canadian ICES-003.
CAUTION: The antenna used for this transmitter must maintain a separation of at least 20 cm from all persons and must not be co-located or operating in conjunction with any other antenna or transmitter.
NOTICE: This device complies with Industry Canada license-exempt RSS standard(s). Operation is subject to the following two conditions: 1. This device may not cause interference, 2. This device must accept any interference received, including interference that may cause undesired operation of the device. This product complies with the radiation exposure limits defined for an uncontrolled environment from FCC OET Bulletin 65 and Industry Canada RSS-102.
Wired Connection
The SAH can be connected directly to a mobile device using the provided USB adapter cables. While the SAH is connected to a mobile device via USB, the Wi-Fi in the SAH is disabled. This connection method is useful when a Wi-Fi connection is unreliable or when Wi-Fi is prohibited. The Wi-Fi in the SAH is re-enabled when the USB cable is disconnected.
Airplane Mode
Airplane mode disables all wireless communication on a mobile device. Airplane mode is useful when operating in an environment that restricts the use of wireless communication. When Airplane Mode is enabled, the SAH can only be used with a wired connection.
Troubleshooting
| Reported Problem | Possible Solution |
|---|---|
| No or not changing data |
|
| Reading is too high or low |
|
| Cannot connect to hood |
|
Maintenance
Some simple routine maintenance after each use will ensure that the instrument will function correctly for many years.
- Remove any moisture droplets using a clean, absorbent lint-free cloth/paper towel before storing the unit.
- Remove all batteries if the unit is to be stored for an extended period of time.
- Always store and transport the unit carefully. Store in dry conditions.
- DO NOT immerse the hood in water. DO NOT use abrasive cleaning products on the hood. The hood can be wiped clean with a damp lint-free cloth.
- DO NOT use abrasive cleaning products on the quad flow sensing grids, which may block or damage the grid. The grid may be CAREFULLY wiped clean with a lint-free cloth. Ensure the air entry holes of the quad flow sensing grids are not contaminated with moisture.
- Check periodically for damage or any visible cracks.
- Take care to not damage or obscure the air entry holes of the quad flow sensing grids. This can seriously affect the measurements obtained.
- Diffuser adapter hood fabric can be wiped clean with a damp cloth, if necessary, and moisture droplets dried with an absorbent lint-free cloth/paper. Periodically, wash in cool water using a mild detergent. Drip dry, ensuring it cannot become caught in any sharp objects.
- The fabric used is impermeable, tough, and very resistant under normal use. In the event that the fabric becomes worn or torn, replace the fabric hood immediately. A damaged hood will seriously affect the measurements taken.
- Anti-static solution can be applied to the instrument by using a clean, lint-free cloth and carefully rubbing it over the instrument. Note: This is normally only necessary when working in low humidity conditions.
Annual Calibration
It is recommended to have the unit calibrated annually to ensure the accuracy of the unit. For calibration purposes, all four quad flow sensing grids and the sensor module must be sent to a Dwyer authorized service facility. Contact customer service for more information.
Repair
The Series SAH SMART Air Hood® balancing instrument is not field serviceable and it is not possible to repair the unit. Field repair should not be attempted and may void warranty.
Warranty/Return
Refer to "Terms and Conditions of Sale" in our catalog and on our website. Contact returns@dwyermail.com to receive a Return Materials Authorization number before shipping the product back for repair. Be sure to include a brief description of the problem plus any additional application notes.
