Logstream VR1 User manual

1
© 2023 Logstream Sp z o.o
VR1
electronic digital glider variometer
hardware version: 3.0
manual version: 1.2
September 2023

2
© 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

3
© 2023 Logstream Sp z o.o
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

4
© 2023 Logstream Sp z o.o
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.

5
© 2023 Logstream Sp z o.o
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

6
© 2023 Logstream Sp z o.o
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

7
© 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)

8
© 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

9
© 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

10
© 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.

11
© 2023 Logstream Sp z o.o
Connectors:
Power supply.
10-16V DC socket ( 5.08 mm )
The device has a built-in 0.75A resettable fuse.
An external 1.5A fuse is recommended
RJ12 communication port:
Pin 1 –DC 3.3v voltage output. Maximum allowable load 100mA
Pin 2 –UART RX input, TTL voltage levels
Pin 3 –UART TX output, TTL voltage levels
Pin 4.5 - not used
Pin 3 - ground (GND)
Installation of the device in the glider:
The device should be mounted in a standard mounting hole ( 57mm ) using the
attached screws.

12
© 2023 Logstream Sp z o.o
ATTENTION !!!
The mounting holes on the left side of the device (upper and lower) are only
4mm deep. Therefore, it is absolutely necessary to use the attached M4x6mm
screws, assuming that the cockpit plate is at least 2mm thick. Using longer
screws will damage the display screen placed directly behind the holes !!!
Pressure:
Connect to the pressure grip with a flexible hose with an internal diameter of
6 mm pressure with:
- TE probe, if possible
- static pressure in the absence of the TE probe
When connected to the TE probe, the variometer will indicate the lift value
compensated, i.e. corrected for the increase/decrease in the glider's total
energy caused by the change in its speed. The quality of compensation then
depends on the quality of the TE probe and the tightness of the probe's
pneumatic system. The installation must be leak-proof.
ATTENTION !!! in this case, due to the fact that the pressure provided by the
TE probe is different from the static pressure, the barometric altitude
indicated by the variometer during the glider flight will be shifted relative
to the actual altitude (on the ground in a stationary glider, the indication
will be correct).
External speaker:
External speaker 8.0Ohm 2W, 3.5mm mono Jack connector is connected to the
audio jack on the back of the device. In the Audio options, set the Speaker
sound output to External.
Firmware update:
When a new version of the device firmware is available, the manufacturer will
send the user a binary file with update instructions.
Contact:
mail: [email protected]
www.logstream.eu

13
© 2023 Logstream Sp z o.o
Electronic digital variometer Logstream VR1
Limited Warranty
The warranty obligations of Logstream Sp z o.o. (“Logstream”) for this product are limited to the terms
set forth below:
This limited warranty covers defects in materials and workmanship in this product.
This limited warranty does not cover any damage, deterioration or malfunction resulting from any
alteration, modification, improper or unreasonable use or maintenance, misuse, abuse, accident,
neglect, exposure to excess moisture, fire, improper packing and shipping (such claims must be
presented to the carrier), lightning, power surges, or other acts of nature. This limited warranty does not
cover any damage, deterioration or malfunction resulting from the installation or removal of this
product from any installation, any unauthorized tampering with this product, any repairs attempted by
anyone unauthorized by Logstream to make such repairs, or any other cause which does not relate
directly to a defect in materials and/or workmanship of this product. This limited warranty does not
cover cartons, equipment enclosures, cables or accessories used in conjunction with this product.
This limited warranty lasts for two (2) years from the date of original purchase of this product.
Logstream will, at its sole option, provide one of the following three remedies to whatever extent it shall
deem necessary to satisfy a proper claim under this limited warranty:
1. Elect to repair or facilitate the repair of any defective parts within a reasonable period of time, free of
any charge for the necessary parts and labor to complete the repair and restore this product to its
proper operating condition. Logstream will also pay the shipping costs necessary to return this product
once the repair is complete.
2. Replace this product with a direct replacement or with a similar product deemed by Logstream to
perform substantially the same function as the original product.
3. Issue a refund of the original purchase price less depreciation to be determined based on the age of
the product at the time remedy is sought under this limited warranty.
If this product is returned to Logstream or the authorized dealer from which it was purchased or any
other party authorized to repair Logstream products, this product must be insured during shipment,
with the insurance and shipping charges prepaid by you. If this product is returned uninsured, you
assume all risks of loss or damage during shipment.
To obtain a remedy under this limited warranty, you must contact either the authorized Logstream
reseller from whom you purchased this product or the Logstream office. For a list of authorized
Logstream resellers and/or Logstream authorized service providers, please visit our web site at
www.logstream.eu or contact the Logstream office direct. In order to pursue any remedy under this
limited warranty, you must possess an original, dated receipt or invoice as proof of purchase. You may
also be directed to an authorized reseller or a person authorized by Logstream to repair the product. If it
is decided that this product should be returned directly to Logstream, this product should be properly
packed, preferably in the original carton, for shipping. Logstream Sp z o.o.

14
© 2023 Logstream Sp z o.o
Limitation on Liability
THE MAXIMUM LIABILITY OF LOGSTREAM UNDER THIS LIMITED WARRANTY SHALL NOT EXCEED THE
ACTUAL PURCHASE PRICE PAID FOR THE PRODUCT. TO THE MAXIMUM EXTENT PERMITTED BY LAW,
LOGSTREAM IS NOT RESPONSIBLE FOR DIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES
RESULTING FROM ANY BREACH OF WARRANTY OR CONDITION, OR UNDER ANY OTHER LEGAL THEORY.
Some countries, districts or states do not allow the exclusion or limitation of relief, special, incidental,
consequential or indirect damages, or the limitation of liability to specified amounts, so the above
limitations or exclusions may not apply to you.
Exclusive Remedy
TO THE MAXIMUM EXTENT PERMITTED BY LAW, THIS LIMITED WARRANTY AND THE REMEDIES SET
FORTH ABOVE ARE EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES, REMEDIES AND CONDITIONS,
WHETHER ORAL OR WRITTEN, EXPRESS OR IMPLIED. TO THE MAXIMUM EXTENT PERMITTED BY LAW,
LOGSTREAM SPECIFICALLY DISCLAIMS ANY AND ALL IMPLIED WARRANTIES, INCLUDING, WITHOUT
LIMITATION, WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IF
LOGSTREAM CANNOT LAWFULLY DISCLAIM OR EXCLUDE IMPLIED WARRANTIES UNDER APPLICABLE
LAW, THEN ALL IMPLIED WARRANTIES COVERING THIS PRODUCT, INCLUDING WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, SHALL APPLY TO THIS PRODUCT AS
PROVIDED UNDER APPICABLE LAW. IF ANY PRODUCT TO WHICH THIS LIMITED WARRANTY APPLIES IS A
“CONSUMER PRODUCT” UNDER THE MAGNUSON-MOSS WARRANTY ACT (15 U.S.C.A. §2301, ET SEQ.)
OR OTHER APPICABLE LAW, THE FOREGOING DISCLAIMER OF IMPLIED WARRANTIES SHALL NOT APPLY
TO YOU, AND ALL IMPLIED WARRANTIES ON THIS PRODUCT, INCLUDING WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR THE PARTICULAR PURPOSE, SHALL APPLY AS PROVIDED UNDER
APPLICABLE LAW.
Other Conditions
This limited warranty gives you specific legal rights, and you may have other rights which vary from
country to country or state to state. This limited warranty is void if
1. Any of the hologram labels of this product has been removed or defaced,
2. this product is not purchased from Logstream or an authorized Logstream reseller.
If you are unsure whether a reseller is an authorized Logstream reseller, please visit our web site at
www.logstream.eu or contact a Logstream office. Logstream thanks you for purchasing a Logstream
product. We hope it will give you years of satisfaction.
Logstream Sp z o.o.
May 2023