Vion A4000.2 Instructions Manual

on/off

“No bullshit” - instructions for the Vion A4000.2 electronic barometer/barograph

Power

There are 3 ways to power the A4000.2.

- Batteries. 4 pieces AA alcaline batteries. The batteries will last around 5 months. If you use the backlight 2.900
times for 20 seconds the battery life is reduced to 4 months.

- USB. The USB connector is located on the left hand side.

- 12 Volt can be applied through the dedicated 12 Volt connector on the left hand side. A 12 Volt connector with
cable is included with the unit. The cord with the white stripe is to be connected to the positive (+) on your power
supply. The unit will function if you supply as little as approximately 6 Volt on the 12 Volt input.

When supplying power using the USB or the 12 Volt connector you may leave the batteries inside as backup.
If the remaining power in the batteries is low the BATTERY LOW icon will switch on, even if USB or 12 Volt power
supply is present.

Switch the A4000.2 barometer on using the on/off switch on the left side.
If you switch it off all data in the memory is lost - don’t worry - it’s not your life’s history that’s lost.

Initial setup

Switching A4000.2 on displays shortly the instructing text “Please proceed with initialization”.
Then “SET” is displayed and you can choose:
Langue (language), heure (hour, time), unités (units), altitude, pression (pressure) and OK.
Select “langue” press the OK button and if you want English then select “anglais” using the + button and press OK.

If you already now are quite annoyed over the buzzer sound go directly to the OK using the + or - buttons and
press the OK button. Now press the orange MODE button for a while and select “buzzer”.
Adjust volume to zero “0”. What a relief!

Warning: This also disables the audio signal for alarms!

Getting back to the SET menu hold down the MODE button for a while and select “set”.
Now you can continue the initialization; set the time and date, the units for pressure, altitude and temperature. Press
the return button (MEM.) to get back to the SET menu.
Now choose altitude and pressure or get back to this later…

Time/date

Upper screen

MOON PHASE icon shows the current moon phase* for

approx. 3 seconds, then the symbol “circles” for 5 seconds
to show you the direction of changes in the moon phase.
*) Please see below regarding the moon phase issue!

L A C O L

L A U D

. R H C T A M

N I

. P M E T

A T T A G E R

m a
m p

. T M O T S U C

d e R

ALARM CLOCK icon is shown, if you have set the alarm
clock.

g H n I

a P h

Either LOCAL icon or DUAL icon will be shown.
LOCAL: A4000.2 shifts between showing time (approx. 6
seconds) and date (approx. 3 seconds).
DUAL: A4000.2 shifts between showing local time (approx.
6 seconds) and dual time (approx. 3 seconds).

MATCH R., REGATTA and CUSTOM T. These icons are used when you start one of the 3 timers.

IN icon and TEMP icon. To tell you that the temperature shown is indoor temperature. Not very relevant (any more)

as an outer temperature sensor cannot be connected.

Relative humidity shown in percent.

GALE WARNING icon appears when a drop in air pressure of 3 hPa (millibars) or greater over a period of 3 hours or

less is detected. This alarm is always set. It cannot be switched off.
An audio alarm will sound (unless the buzzer is switched off).
The alarm will be present at the electronic alarm output connector (but only if the buzzer is switched on).

. R L A

Buzzer off icon Gale warning icon Battery low icon

. M E M

. N I M

. X A M

Air pressure in hPa (millibars). Or if you change settings InHg icon.

Sea level pressure: “Red” is shown. Actual pressure: “Red” is not shown.

ALR. icon is shown if a pressure alarm has been set.

“X” icon is shown if the buzzer is switched off. In this case all alarms are “sound-free” and will only be indicated by

text in the chart display (lower display).

MEM. icon is shown if a pressure value has been saved in memory.

MIN. icon is shown when using the HISTORY function, if a pressure is the minimum value during the period.

MAX. icon is shown when using the HISTORY function, if a pressure is the maximum value during the period.

BATTERY LOW icon is shown when the remaining energy in the batteries is low. Replace batteries within a few days

to prevent data loss, and prevent leaking batteries. This icon will switch on when batteries are low, even if USB or 12
Volt power supply is present.
Note: When you take out the old batteries you only have 10 seconds to insert the new ones, or the data will be lost. So
be well prepared.

*) The moon phase display doesn’t work from 1/1-2018 because the program apparently was made to run in a ten
year period from 2008 to 2017. However if you choose a month in this period with the same moon phase rhythm as
the present month’s moon phase rhythm you will achieve a correct moon phase display. The date will of course not be
correct.
March 2018 corresponds to August 2012, April 2018 corresponds to September 2012
May 2018 corresponds to October 2012, June 2018 corresponds to November 2012
July 2018 corresponds to December 2012, August 2018 corresponds to January 2013
September 2018 corresponds to February 2013, then it jumps
October 2018 will correspond to June 2013, November 2018 will correspond to July 2013
and so on...