Quha Vento User manual

USER MANUAL

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Quha Vento Standalone Puff Switch
Welcome to the Quha Vento Standalone Puff Switch. Before you
start using your Quha Vento, for the best user experience, please
read this manual carefully first.
Quha Vento is a generic standalone puff switch. Vento can be
used for various purposes such as activating environment
control, nurse calls and computer mouse clicks.
Figure 1- Quha Vento

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Quha Vento Controls and Main Parts
1. Quha Vento main unit
2. Sensor arm
3. Puff sensor
4. 3.5 mm connector plug
5. Connector cable
6. Indicator lights
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2
3
4
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Figure 2

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Quha Vento Controls and Main Parts
7. Back lid bracket
8. Switch (1) for buzzer sound indicator
9. Switch (2) for puff sensor sensitivity
10.UNC 1/4” mounting thread
11.Battery slot for AAA battery
12.Flexible attachment loop
13.Back lid / Battery slot cover
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78910
Figure 3
12 13

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Installation
Before using Quha Vento there are a few things to do.
1. Select the settings (See Settings on page 6) to be used with
Vento.
2. Place a new AAA battery in the battery slot observing the
correct orientation.
3. Insert the flexible attachment loop into the battery slot cover
and close the battery slot cover by pushing it onto Vento.
4. Mount Vento to its attachment.
5. Connect the 3.5 mm connector plug (Figure 2: 4) to the device
to be controlled with the switch.
Replacing the Battery
1. Open the battery slot cover (Figure 3: 13) by carefully lifting
both of its edges.
2. Remove the old battery and place a new AAA battery in its
place observing the correct orientation.
3. Insert the flexible attachment loop into the battery slot cover
and close the battery slot cover by pushing it onto Vento.

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Attaching Vento to a Mount
Vento has a standard UNC 1/4” camera thread (Figure 3:10) on
its rear side. Attach Vento to a mount with this thread.
Alternatively, the flexible attachment loop (Figure 3:12) can be
used to mount Vento to Quha Vento Headband.
Cable tie can also be used to mount Vento. In this case the cable
tie is wrapped around the narrowest part of Vento.
Settings
There are two switches (Figure 3: 8, 9) that control the user
selectable features of Vento. The switches are located under the
battery slot cover. The switches can be set using a flathead
screwdriver included in the sales package.
Sensitivity switch changes the sensitivity of the puff sensor.
Off - Low sensitivity
On - High sensitivity
Buzzer switch turns the switch buzzer sound indicator on and
off.
Off - Buzzer sound off
On - Buzzer sound on
High sensitivity setting can be used when faster response to a
puff is required. Low sensitivity is useful if the puff sensor picks
unwanted clicks.
Indicator Lights
There are two indicator lights (Figure 2: 6) on the front panel of
Vento. When the puff sensor detects air flow that activates the

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switch, one of the indicator lights is lit. Green light indicates the
battery condition is good for use, red light indicates the battery
needs to be replaced soon.
Vento can be used as a switch for various purposes such as
environment control, nurse calls and computer mouse clicks.
Using Quha Vento
Quha Vento detects the air flow - puff - coming from the user’s
mouth. The puff sensor is located at the end of the sensor arm.
The more air flow there is to the sensor, the more accurately the
switch can be controlled. Therefore, it is necessary to position
the sensor so that the air flow can reach it.
The flexible sensor arm is adjusted so that the sensor is located
in front of the user’s mouth at a comfortable distance. A typical
distance is 1-5 cm (0.4-2 inch). Try different positions to find the
one most suitable for you. Because the air flow strength varies
greatly between users, it is possible to find a good position with
some experimenting in a few minutes.
Testing the switch is simple. Puff into the sensor and the switch
is activated. Puff and keep puffing into the sensor and the switch
remains active as long as the puff continues.
Compatibility
Quha Vento is compatible with devices with a 3.5 mm switch
connector.

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Troubleshooting
Switch activation is not happening every time when a puff is
made
Make sure that the sensor arm is positioned close enough to the
mouth and that the air flow reaches the sensor.
Random switch activation
Talking creates an air flow similar to puffing into the sensor and
the sensor picks this up. A good way to prevent random switch
activation created by talking is placing the puff sensor in front of
the chin slightly lower than the lower lip. Another way is to
increase the distance between mouth and the sensor.
If the puff sensor rubs the user's clothing or skin, this may be
picked up by the sensor.

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Technical Specifications
Dimensions Length 98 mm, width 41 mm, height 26 mm,
Vento arm length 220 mm and weight 97 g
without battery. Cable length 180 cm.
Battery Easily replaceable AAA battery, battery life up
to 2 years depending on use and battery type.
Mounting ¼” UNC thread (camera mount)
Output 3.5 mm audio plug (mono),
Opto-isolated normally open (NO) output,
load current up to 100 mA, isolation 1500 VRMS
Operating temperature
From +10°C to +35°C (from +50°F to +95°F)
Storage temperature
From +0°C to +45°C (from +32°F to +113°F)

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Keeping Quha Vento Clean
As a contactless puff switch, Quha Vento is easy to keep clean. If dust or
saliva gets on the plastic surfaces, they can be cleaned with a
physiologically sensitive area cleaning agent.
Product Disposal
When the device has reached its end-of-life it should be
recycled as electric and electronic waste.
European Compliance
The manufacturer of this product confirms that this
product complies with the European Union
regulations for safety, health, environmental and
consumer protection.
FCC Compliance
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.
Limited Warranty
Warranty on the product is 2 years from the date of purchase.

Product and Safety Information
The device includes sensitive electronic components and the user should not try to
open or service the device themselves.
This device is for indoor use only. Do not allow the device to get wet.
Any modifications not approved by Quha could void the user’s authority to operate
the device.
Keep the device clean. Do not clean the device with solvents, toxic chemicals or
strong detergents as they may cause damage to the product. Store your device only
on flat surfaces. Do not drop or shock the product as it may be damaged.
Follow all instructions in the user guide to ensure the longest lifespan of your
device. Damage or poor performance caused by failure to follow warnings and
instructions can void your manufacturer’s warranty.
Do not store your device near magnetic fields. Your device may malfunction from
exposure to magnetic fields.
This product is RoHS compliant.
© 2021 Quha oy. Quha oy is not responsible for possible errors
in this user manual. Quha oy reserves the right to revise the
content of this user manual.

Designed and manufactured in
Finland by Quha.
www.quha.com
Copyright 2021 Quha oy.
Quha, the Q-mark and Quha Vento are trademarks or
registered trademarks of Quha oy.