on/off
Instructions for the Vion A4003 electronic barometer/barograph
Power
There are 3 ways to power the instrument.
- Batteries. 4 pieces AA alkaline batteries. The batteries will last 2-3 months. If you use the backlight 2.900
times for 20 seconds the battery life is reduced to approx. 2 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.
Connector for alarm output
Alarms can be transferred to external equipment through the alarm output connector on the left hand side.
This output is an electronic switch (“open drain”). So if you want to connect directly to a siren or a lamp you have to
supply the power.
The maximum ratings are indicated on the side of the barograph: 12-24 Volts and 0,5 Amps. However we recommend
you keep the current below 0,25 Amps. - Connector type: 3.5 mm mini jack mono or stereo. - Your external power
supply’s ground (-) shall be connected to the shield/outer part of the connector.
Initial setup
Switch the instrument on using the on/off switch on the left side.
The unit will automatically start in the menu SETTINGS.
Choose your language, time, date etc.
NEW
: The beep and alarm volumes can now be adjusted separately.
If you don’t want the buzzer to beep when pressing buttons, go to the MENU by pressing the orange button for a
while, choose “settings” and then “buzzer”. Here you can switch off the beep volume. Adjust beep volume to zero “0”.
