Logstream VR1 User manual

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© 2023 Logstream Sp z o.o
VR1
electronic digital glider variometer
hardware version: 3.0
manual version: 1.2
September 2023

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© 2023 Logstream Sp z o.o
Logstream VR1 is standalone digital variometer. The unit has standard
dimensions to fit into a glider panel - 57 mm diameter (2¼"). The unit is
equipped with a precise digital pressure sensor and a fast 32-bit
microprocessor for very accurate indications. The data is displayed on a very
high brightness LCD screen. VR1 is equipped with a rotary knob with a
pushbutton for controlling the device.
Main features.
dimensions 65x63x80 mm weight 210g
precise digital pressure sensor
fast 32-bit microprocessor
1 pressure transmitter ((TEK) or static tube)
2.4” display with very high brightness
rotary knob with a button
internal speaker
the ability to connect an external speaker
UART TTL external communication interface
Technical data.
8-16V DC power supply
consumed current:
o100mA 12V –display brightness to minimum without audio
o180mA 12V - maximum display brightness without audio
mounting in a standard 57 mm hole

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System
Knob
The knob with the button is the basic way of communication with the device.
Turning the knob changes the currently set parameters and pressing it accepts
the introduced changes or moves to the selected menu level.
Starting the device
Depending on the settings made, after connecting the power supply, the device:
1) Starts up and stays in normal operation
2) Starts up and goes to sleep (screen off, limited power consumption)
3) Pressing the button on the knob wakes the device up from the sleep
mode and returns it to the normal operation mode
Turning off the device
1) By pressing and holding the button on the rotary knob for 4 seconds
2) By selecting "Power off" in the main menu

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Graphical user interface
Modes of operation
The device works in 3 modes:
1) Main screen mode
2) Setting mode
3) Sleep mode
Main screen mode
In this mode, the vario indicates:
- the current vario value by deflection of the red needle
- the average vario value by moving of the blue circle indicator
- selected values in the upper, main and lower information fields
- supply voltage of the device in the form of a yellow value in the bottom
field
Vario scale range ( 2.5, 5.0, 10.0 m/s ) is user adjustable.
Turning the knob in this mode increases (right) or decreases (left) the
volume.
Pressing the knob in this mode takes you to the setting mode.

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Settings mode
Elevation –setting the current elevation
Vario –settings of vario parameters
Sound –settings of sound parameters
Display –settings of display parameters
Units –measurement units settings
Info –display information about the device
Others –other settings
Power off –putting the device into sleep mode
Exit –exit to the main screen
Vario screen
Filter –sensitivity of the variometer, the lower the value, the more
sensitive the device is. At the beginning we suggest a value of 1.5s
Averager - average vario. Set how many seconds to take the average
Range –variometer scale ( 2.5, 5.0, 10.0 m/s )
Nmea out –format of data sent outside via the UART port

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Sound screen
Select speaker –selection of the speaker output
Negative –whether the device should generate sound or not when the current
vario value is negative
Deadband - the range (+/-) of the vario indication from 0m/s up and down, in
which no sound is generated
Initial volume - default volume when the device is turned on. During the
flight, you can easily change the volume by turning the knob on the main
screen
Vario tone –sound parameters
Exit - exit to the main menu
Vario tone screen

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© 2023 Logstream Sp z o.o
Tone shape –sound wave shape.
Sinus –better for a larger external speaker,
Triangle –better for a smaller internal speaker
Freq at 100% - sound frequency for maximum lift
Freq at 0% - sound frequency for zero lift
Freq at -100% - sound frequency for maximum sink
Display screen
Brightness –display brightness 5%-100%
Upper number –type of information displayed in the upper field
Middle number –type of information displayed in the main field
Lower number –type of information displayed in the lower field
Types of values that can be displayed:
Vario –current vario
Average vario –average vario
Altitude –pressure altitude
Pressure –current atmospheric pressure
Flight time –time of flight (since device power up)
Set elevation - when this option is turned on, the elevation setting screen is
always displayed after connecting the power supply
Sleep mode - when this option is turned on, the device goes into sleep mode
immediately after connecting to the power supply (from which you can exit by
pressing the knob)

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© 2023 Logstream Sp z o.o
Units screen
Here we can set which units the data will be presented:
Vertical speed –vario units
Altitude –altitude
Pressure –atmospheric pressure
Screen Info
This screen shows the device data. Eg. hardware and software version. Turning
the knob moves to the next sub-screens.
Menu Others

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© 2023 Logstream Sp z o.o
Voice warnings screen
The variometer can provide a voice warning/reminder about closing/opening the
glider landing gear.
After tow release - selecting this option enables the function of reminding
you to close the landing gear after releasing it from the tow. After exceeding
the altitude entered in the Upper altitude field, the variometer will generate
(only once during the flight) a voice reminder about the landing gear.
Before landing –selecting this option activates the function of reminding you
to open the landing gear before landing. After exceeding the altitude entered
in the Lower altitude field ( during descending ) , the variometer will
generate (only once during the flight) a voice reminder about the landing
gear.
Upper altitude - enter the altitude beyond which the variometer will generate
a voice reminder about the landing gear. Default 700m
Lower altitude - enter the altitude beyond which the variometer will generate
a voice reminder about the landing gear. Default 200m
Test warning - pressing generates a warning

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© 2023 Logstream Sp z o.o
Menu Reset to factory defaults
Selecting this menu option resets the device settings to the default (factory)
settings.
Service code screen
The screen is used to enter the service codes received from the manufacturer
in order to perform service activities (e.g. automatic device diagnostics).
Do not enter any values here alone.