Pulsar PSBEN 2012B/LCD User manual

PSBEN 2012B/LCD
v.1.0
PSBEN 13,8V/2A/7Ah/EN/LCD
Buffer, switched mode power supply unit.
EN
Edition: 3 from 20.11.2012
Supersedes the: 2 from 14.09.2012 edition

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CONTENTS
1. FUNCTIONAL REQUIREMENTS OF THE PSU COMPLIANT WITH PN-EN 50131-6............4
2. TECHNICAL DESCRIPTION. .................................................................................................................5
2.1. G ENERAL DESCRIPTION ................................................................................................................................................................5
2.2. B LOCK DIAGRAM ..........................................................................................................................................................................5
2.3 D ESCRIPTION OF PSU’ S COMPONENTS AND CONNECTORS ..........................................................................................................6
3. OPERATING STATUS INDICATION....................................................................................................7
3.1. C ONTROL PANEL ...........................................................................................................................................................................7
3.2. M AIN SCREEN OF THE LCD DISPLAY ...........................................................................................................................................8
3.3 I NFORMATION DISPLAYED ON THE PANEL ....................................................................................................................................9
3.3.1. Overview menu.....................................................................................................................................................................9
3.3.2 Screen – parameters of the PSU..........................................................................................................................................9
3.3.3 Screen – history of the PSU’s parameters........................................................................................................................10
3.3.4 Screen – failure history...................................................................................................................................................... 10
3.4 PSU SETTINGS ............................................................................................................................................................................ 11
3.4.1 Password of access............................................................................................................................................................11
Entering the password..................................................................................................................................................................12
Password change. ........................................................................................................................................................................13
Skipping the access password.......................................................................................................................................................13
Erasing passwords.......................................................................................................................................................................13
Keypad password........................................................................................................................................................................13
3.4.2 PSU.....................................................................................................................................................................................14
Setting the battery presence..........................................................................................................................................................14
Setting the battery test..................................................................................................................................................................15
Setting the battery protection........................................................................................................................................................ 15
Setting the EPS output lag............................................................................................................................................................16
Setting the communication address...............................................................................................................................................17
3.4.3 Desktop...............................................................................................................................................................................17
Setting the language of messages. ................................................................................................................................................18
Setting the date............................................................................................................................................................................18
Setting the time............................................................................................................................................................................19
Setting the highlighting................................................................................................................................................................ 19
Setting the contrast......................................................................................................................................................................20
3.5 A COUSTIC INDICATION ...............................................................................................................................................................21
3.6 T ECHNICAL OUTPUTS .................................................................................................................................................................21
3.7 I NPUTOF COLLECTIVE FAILURE : EXT IN..................................................................................................................................22
4. BATTERY-ASSISTED OPERATION....................................................................................................23
4.1. R UNNING THE PSU FROM THE BATTERY ..................................................................................................................................23
4.2. D EEP DISCHARGE BATTERYPROTECTION UVP........................................................................................................................23
4.3 D YNAMIC BATTERY TEST ........................................................................................................................................................... 23
4.4. S TANDBY TIME ..........................................................................................................................................................................23
4.5. B ATTERYCHARGING TIME ........................................................................................................................................................24
4.6 O PERATION WITHOUT ABATTERY .............................................................................................................................................24
5. REMOTE MONITORING (OPTION: WI-FI, ETHERNET, RS485, USB)....................................25
5.1 C OMMUNICATION IN WI-FI WIRELESS NETWORK .....................................................................................................................25
5.2 C OMMUNICATION IN ETHERNET NETWORK ...........................................................................................................................25
5.3 C OMMUNICATION IN RS485 NETWORK .....................................................................................................................................25
5.4 USB-TTL COMMUNICATION . ....................................................................................................................................................26
5.5 ”P OWER SECURITY ” PROGRAM . ................................................................................................................................................26
6. TECHNICAL SPECIFICATIONS..........................................................................................................27
T ABLE 10. E LECTRICAL SPECIFICATIONS ........................................................................................................................................27
T ABLE 11. M ECHANICAL SPECIFICATIONS ......................................................................................................................................28
T ABLE 12. O PERATION SAFETY ........................................................................................................................................................28
T ABLE 13. O PERATING SPECIFICATIONS ..........................................................................................................................................28
T ABLE 14. PSU’ S FACTORY SETTINGS .............................................................................................................................................28

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7. INSTALLATION........................................................................................................................................29
7.1 R EQUIREMENTS ..........................................................................................................................................................................29
7.2 I NSTALLATION PROCEDURE . ......................................................................................................................................................29
8. OPERATION AND USE...........................................................................................................................30
8.1. O VER VOLTAGE PROTECTION OVP AT THE PSU OUTPUT . ......................................................................................................30
8.2 O VERLOAD OF THE PSU.............................................................................................................................................................30
8.3 S HORTCIRCUIT AT THE PSU OUTPUT ........................................................................................................................................30
8.4 B ATTERYREPLACEMENT . ..........................................................................................................................................................30
8.5. M AINTENANCE ..........................................................................................................................................................................30
9. PSU FAILURE CODES. ...........................................................................................................................31

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Features:
•PN-EN50131-6 compliance, grades 1÷3 and II
environmental class
•mains supply of 230VAC
•uninterrupted voltage of 13,8VDC
•fitting battery: 7Ah/12V
•high efficiency 70%
•PSU current efficiency:
•0,58A – for grades 1 , 2 *
•0,23A – forgrades 3 **
•2A – for general use ***
(see: chapter 2.1)
•low level of voltage ripple
•microprocessor-based automation system
•intelligent management of PSU power’s output stage
•serial port for communication with a computer via ”Power
Security” program
•remote monitoring (option: WiFi, Ethernet, RS485, USB)
•load current control
•output voltage control
•output fuse status control
•dynamic battery test
•battery circuit continuity control
•battery voltages control
•battery fuse status control
•battery charge and maintenance control
•deep discharge battery protection (UVP)
•battery overcharge protection
•battery output protection against short circuit and reverse
polarity connection
•jumper selectable battery charging current
0,2A/0,6A/1A/1,5A
•remote testof the PSU (additional module required)
•START button for battery activation
•STOP button for disconnecting during battery-assisted
operation
•optical indication – LCD panel
•electrical parameters reading, e.g.: voltage,
current
•failure indication
•PSU settings adjusted from the panel’s level
•3 levels of access, password-protected
•PSU’s operation history
•failure history
•real-time clock, battery-backed
•optical indication of PSU overload OVL
•acoustic indication of failure
•adjustable times indicating AC power failure
•technical inputs/outputs with galvanic isolation
•collective failure input EXT IN
•EPS technical output indicating AC power loss
•PSU technical output indicating PSU failure
•APS technical output indicating battery failure
•internal memory of PSU operating status
•protections:
• SCP short circuit protection
• OLP overload protection
• OHP overheat protection
• OVP over voltage protection
• surge protection
• against tampering: unwanted opening of the
enclosure or detachment from the mounting surface
•convectional cooling
•warranty – 5 year from the production date
1. Functional requirements of the PSU compliant with PN-EN 50131-6.
Requirements of
PN-EN 50131-6Functional requirements Grade 1 Grade 2 Grade 3
PSBEN2012B/
LCD
EPS network absence YES YES YES YES
Battery low voltage YES YES YES YES
Protection against full battery discharge - - YES YES
Battery fault - - YES YES
No battery charge - - YES YES
Output low voltage - - YES YES
Output high voltage - - YES YES
PSU fault - - YES YES
Surge protection - - YES YES
Short circuit protection YES YES YES YES
Overload protection YES YES YES YES
Output fuse activation - - - YES
Battery fuse fault - - - YES
EPS technical output YES YES YES YES
APS technical output YES YES YES YES
PSU technical output YES YES YES YES
Collective failure input - - - YES
PSU remote test - - - YES
Tamper resistance – enclosure opening YES YES YES YES
Tamper resistance – detachment from the
mounting surface - - YES YES

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2. Technical description.
2.1. General description.
The buffer power supply has been designed in accordance with the requirements of the PN-EN 50131-6
standard, grade 1÷3 and II environmental class. It is intended for an uninterrupted supply to alarm system devices
requiring stabilized voltage of 12V/DC (+/-15%).
Depending on a required protection level of the alarm system in the installation place, the PSU efficiency
and the battery charging current ought to be measured as follows:
* Grade 1, 2 - standby time 12h
Output voltage 0,58A + 1,5A battery charge
** Grade 3 - standby time 30h if the faults of the main power source are reported to the Alarm Receiving
Centre - ARC (in accordance with 9.2 – PN-EN 50131-1).
Output voltage 0,23A + 1,5A battery charge
- standby time 60h if the faults of the main power source are reported to the Alarm Receiving
Centre - ARC (in accordance with 9.2 – PN-EN 50131-1).
Output voltage 0,116A + 1,5A battery charge
*** General use – if the PSU is not mounted within an installation which is PN-EN-50131 compliant, the
acceptable current efficiency amounts to:
1. Output voltage 2A + 0,2A battery charge
2. Output voltage 1,6A + 0,6A battery charge
3. Output voltage 1,2A + 1A battery charge
4. Output voltage 0,7A + 1,5A battery charge
Total current of the receivers + battery: 2,2A max.
In case of power decay, a battery back-up is activated immediately. The PSU is housed in a metal
enclosure (colour: RAL 9005 - black) which can accommodate a 7Ah/12V battery. It features a micro switch that
indicates unwanted door opening (faceplate) and detaching from the mounting surface.
2.2. Block diagram.
The PSU has been manufactured based on a high-duty system of DC/DC converter. It features a
microprocessor-based operation control, responsible for full diagnostics of the PSU and battery parameters.
Fig. 1. Block diagram of the PSU.

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2.3 Description of PSU’s components and connectors.
Table 1. Elements of the PSU pcb (see Fig. 2).
Element no. Description
[1] PANEL – optical indication connector
[2] P
BAT
– jumper; idle in this model
T
AC
– jumpers J1, J2; idle in this model
CAUTION. In this model, jumpers are operated from the LCD desktop’s level (see:chapter 3.4.2).
[3]
I
BAT
– battery charging current selection
J1= , J2= J3= I
BAT
=0,2 A
J1= , J2= J3= I
BAT
=0,6 A
J1= , J2= J3= I
BAT
=1,0 A
J1= , J2= , J3= I
BAT
=1,5 A Caption: jumper on, jumper off
[4] START – button (launching the PSU from a battery)
STOP –button (disconnection of the PSU during battery-assisted operation)
[5] – pin; activation of acoustic indication - indication on
- indication off Caption: jumper on, jumper off
[6] V
ADJ
– potentiometer, DC voltage adjustment
[7] BUZZER – acoustic indicator
[8] F
BAT
– fuse in the battery circuit
[9]
Connectors:
~AC~ – AC power input
+BAT –DC power battery output
+AUX – DC power output (+AUX= +U, -AUX=GND)
EPS FLT – technical output of AC network absence indication
open = AC power failure
close = AC power - O.K.
PSU FLT – technical output of PSU failure
open = failure
close = PSU working correctly - O.K.
APS FLT – technical output of battery failure
open = battery failure
close = battery O.K.
EXT IN – output of collective failure
[10] V
EXT
pin – polarisation of EXT IN circuit
[11] Communication connector
[12]
LEDs – optical indication:
AC – presence of the AC power
AUX – DC output voltage
OVL – PSU overload
PSU – PSU failure
APS – battery failure
EXT – EXT IN output’s status
LB – battery charge
[13] OVP – optical indication for activating the over voltage system
Fig. 2. The view of the PSU’s pcb.

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Table 2. PSU elements (see fig. 3).
Element no. Description
[1] Insolation transformer
[2] PSU board (tab.1, fig.2)
[3] TAMPER; micro-switch (contacts) of tamper resistance (NC)
[4] F
MAIN
fuse in the supply circuit (230 V AC)
[5] L-N 230V/AC power connector, PE connector
[6] Battery connectors: positive: +BAT = red, negative: - BAT = black
[7] Grip of tamper resistance
Fig.3. The view of the PSU.
3. Operating status indication.
3.1. Control panel.
The PSU is equipped with a panel with buttons and an LCD display which enables reading all available
parameters of the device. The buttons are for selecting and approving a certain parameter that is to be displayed.
Fig. 4. The control panel.

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Table 3. A description of buttons and LEDs of the LCD panel.
- move the cursor on the display
- selection approval
- leaving the editing mode without changing the values
- entering the overview menu mode
- red LED indicating the presence of AC voltage
- green LED indicating power at the AUX output of the SU
- red LED indicating the SU failure
The resolution for voltage measurement amounts to 0.1V, for current measurement: 0.1A. Displayed
voltage and current rate is only approximate. For higher accuracy, a multimeter shall be used.
3.2. Main screen of the LCD display.
The main screen of the LCD display shows basic electrical parameters and informs about the current PSU
state.
Fig. 5. The main screen.
Table 4. Description of the symbols on the main screen.
Screen field Description
Information about the current AC power status.
- AC powerpresent
- no AC power
Information about the present voltage at the AUX output and the current consumption. In
case of a failure tripped by incorrect output voltage or exceeding the load current, an
appropriate parameter twinkles on the display.
Information about the battery charging level. In case of a failure, the battery symbol
twinkles.
A field symbolising the PSU.
In case of a PSU failure, a twinkling symbol with an exclamation mark appears.
Fuse symbol.
Twinkling symbol informs about activation of the fuse.
Clock

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3.3 Information displayed on the panel.
3.3.1. Overview menu.
After pressing the ‘ESC’ button, an overview menu appears at the bottom of the display. It enables
choosing one of three available PSU screens:
- parameters of the PSU
- history of the PSU’s parameters
- history of events
In order to choose a proper screen, select a dedicated field by pressing the arrow buttons: ‘<’ or ‘>’. Then,
approve by pressing the SET button.
Fig. 6. Overview menu.
3.3.2 Screen – parameters of the PSU.
The screen displays electrical parameters and the technical outputs’ status during operation. Highlighting of
an element informs about an active state and reflects the status of LEDs on the pcb of the PSU. (see table 1, [12]).
Fig. 7. Screen – parameters of the PSU.
Table 5. Description of the symbols on the screen – parameters of the PSU.
Screen field Description
- Indicates presence of AC power (highlighted = AC power present)
- Indicates battery charging process (highlighted = charging in process)
- Indicates the PSU’s overload (highlighted = PSU overloaded)
- Indicates the PSU’s failure (highlighted = failure of the PSU)
- Indicates the battery failure (highlighted = failure of the battery)
- Indicates the EXT IN input status (highlighted = EXT IN input is active)
Current electrical parameters of the PSU:
Uaku – battery voltage
Uaux – output voltage
Iaux – output current

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PSU technical outputs’ status:
EPS – AC network presence indication
open = AC power failure
close = AC power - O.K.
PSU – PSU failure indication
open = failure
close = PSU working correctly - O.K.
APS – battery failure indication
open = battery failure
close = battery O.K.
3.3.3 Screen – history of the PSU’s parameters.
During normal operation the PSU records the electrical parameters delivered to the AUX output and saves
them in its non-volatile memory. The saving occurs every 5 minutes and the internal memory can store up to about
6100 values. The memory works in a circular cycle. When the memory becomes fulfilled, the oldest entries get
replaced with the newest ones.
The screen of the parameters history enables reading of the stored parameters and scanning the values on
a chart. The screen features a time axis, located horizontally in the bottom part of the chart, and the axis of a
selected parameter – locatedvertically in the left part. The cursor can be moved into various time points via ‘<’ and
‘>’ buttons. For each time point, the corresponding value in can be read.
Fig. 8. Screen of the history of PSU’s parameters.
From the given chart entries, the values of the following parameters can be read:
- Uaux - output voltage (approximate value within 5 minute period)
- Uaux max - maximum output voltage
- Uaux min - minimum output voltage
- Iaux - output current (approximate value within 5 minute period)
- Iaux max - maximum output current
- Iaux min - minimum output current
For optimal reading and analysis of the values shown on the chart, the time range of the chart screen can
be adjusted in the bottom axis. Here are the available ranges:
<8h>
<24h>
<2days>
<week> (weekly)
In order to change the displayed parameter, highlight its name by pressing the ‘SET’ button. Then, with the
‘<’ and ‘>’ buttons choose the requested measurement. Pressing the ‘SET” button again will highlight the time
range of the chart, which can be changed with the ‘<’ and ‘>’ buttons. Another pressing of the ‘SET’ button will
enable moving the cursor (vertical dotted line on the chart) along the time line with the ’<’ and ‘>’ buttons. The
values of currently chosen parameter and the register time pointed by the cursor will also be highlightened,
3.3.4 Screen – failure history.
If any incorrect electrical parameters appear during the operation, the PSU will begin indicating the failure
by cyclical switching on and off the LCD display illumination, illuminating the failure LED on the panel and activating
the acoustic indication (provided, it has not been switched off).
The screen of the PSU failure history enables overviewing the events recorded by the internal diagnostic
system. The memo can store over 2000 events carrying information about the fault type, time of occurrence and
values of the voltages or load current. Additionally, on the basis of the stored parameters, the diagnostic system
assigns the fault code characteristic for a particular event.
The operation history can be previewed by pressing ’<’ or ‘>’. It can be done in two modes: short (date,
time, code, fault description) or full - with additional information about values of voltages and current, and status of
inputs and outputs. Switching between the modes is to be done by the ‘SET’ button.

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Fig. 9. Failure history screen.
In chapter 9, there have been listed codes of all possible failures that may occur during the PSU operation.
Each code is accompanied by appropriate optical indication on the panel, acoustic indication and activation of a
dedicated technical output.
3.4 PSU settings.
From the desktop’s level, the configuration of the SU settings is possible. To enter the adjustment mode,
press the ‘SET’ button from the main screen’s level.
Fig .10. Window of the SU settings.
3.4.1 Password of access.
The PSU operates 3 levels of access to configuration which limit the possibility of changing the PSU’s
settings from the level of the LCD desktop. They are protected withseparate passwords.
Keypad password – locks the access to buttons of the LCD desktop, only an idle screen is visible.
In this mode, pressing any button causes a password demand.
User password – allows access to the desktop’s settings
Installer password – full access to the PSU’s settings
The option with the keypad password appears on the screen only after entering the correct user or installer
password.
Table 6. Ranges of access.
Access range
PASSWORD Buttons ‘Desktop’
Settings ‘PSU’ Settings
KEYPAD •- -
USER ••-
INSTALLER •••
Preset passwords:
keypad password – ____ (none)
user password – 1111
installer password – 1234

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Entering the password.
- set menu with ‘>’ or ‘<’ Password (enter/change)
- press the ‘SET’ button,
another window with available levels of passwords will
appear
- with ‘>’ or ‘<’ choose the right level of the password
- confirm your choice with the ‘SET’ button
- with ‘>’ or ‘<’ enter the first digit
- confirm your choice with the ‘SET’ button
- with ‘>’ or ‘<’ enter the second digit
- confirm your choice with the ‘SET’ button
- with ‘>’ or ‘<’ enter the third digit
- confirm your choice with the ‘SET’ button
- with ‘>’ or ‘<’ enter the fourth digit
- confirm your choice with the ‘SET’ button

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If the typed password is incorrect, the following message will appear:
Fig. 11. The message after entering a wrong keypad password.
If none of the buttons is pressed within the next 30 seconds, the PSU settings will be locked
automatically.
Password change.
After entering the correct password, it is a possibility to change it. Choose the password that will be altered
and enter the new one.
Skipping the access password.
If the password of access to the PSU’s settings is not required, it can be skipped by typing ‘0000’ as a new
password.
Keypad password ”0000” unlocks the access to the keypad.
User password ”0000” unlocks the access from the user’s level.
Installer password ”0000” unlocks the access fromthe installer’s level.
Erasing passwords.
If by any chance, the passwords have been lost, there is a procedure that will allow reassigning the
passwords.
Please, do as follows:
a) unplug the PSU from the AC network and the battery for at least 10 seconds
b) press the STOP button on the pcb of the PSU
c) plug in the PSU to the AC power and the battery while having the button pressed for another 10
seconds
d) the PSU will display the message: ”Access unlocked”
e) confirm by pressing the ‘SET’ button
f) go to menu ”Settings -> Password” and change the passwords into new ones
If none of the buttons is pressed within the next 30 seconds, the PSU settings will be locked
automatically.
Keypad password.
If the keypad has been locked due to the access password, the activation of the keypad access will occur
after minimum 30 seconds of not pressing any buttons on the desktop. After this time, pressing any button on the
desktop will display a window witch a password demand. The password is to be entered using ‘<’ or ‘>’ as it has
been explained above.
Fig. 12. Keypad password demand.

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3.4.2 PSU.
The facility is only available after entering the correct installer’s password.
Selecting the “PSU” entry in the setting menu enables entering another menu from which the full PSU’s
settings configuration is possible. After entering the right settings, they are stored in non-volatile memo which
protects the PSU against data loss in case of a failure of mains power decay.
Fig. 13. ‘PSU’ screen
Table 7. Description of the ‘PSU’ screen.
Entry Description
Battery present YES – battery connected to the PSU
NO – battery not connected to the PSU (see chapter 4.6)
Battery test YES – battery test on
NO – battery test off (see chapter 4.3)
Battery protection YES – battery protection function (disconnection) on
NO – battery protection function (disconnection) off (see chapter 4.2)
EPS output lag Adjustable time lag of AC power failure indication:
5s/2min 20s/17min/2h20min
Communication
address 1÷ 247 PSU address required during the communication with the computer
Transmission Defines the speed and protocol of communication
9.6k 8N2
9.6k 8E1
9.6k 8O1
19.2k 8N2
19.2k 8E1 (factory settings)
19.2k 8O1
Setting the battery presence.
- with ‘>’ or ‘<’ choose the Battery presence menu
- press the ”SET” button, you will see the prompt at the end of the line

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- with ‘>’ or ‘<’ set ‘YES’ or ‘NO’
YES – if the battery is connected to the PSU
NO – if the battery is not connected to the PSU
- confirm your choice with the ‘SET’ button
Setting the battery test.
- with ‘>’ or ‘<’ choose the Battery test menu
- press the ”SET” button, you will see the prompt at the end of the line
- with ‘>’ or ‘<’ set ‘YES’ or ‘NO’
YES – battery test on
NO – battery test off
- confirm your choice with the ‘SET’ button
Setting the battery protection.
- with ‘>’ or ‘<’ choose the Battery protection menu

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- press the ”SET” button, you will see the prompt at the end of the line
- with ‘>’ or ‘<’ set ‘YES’ or ‘NO’
YES – battery protection function (disconnection) on
NO – battery protection function (disconnection) off
- confirm your choice with the ‘SET’ button
Setting the EPS output lag.
- with ‘>’ or ‘<’ choose the EPS output lag menu
- press the ”SET” button, you will see the prompt at the end of the line below
- with ‘>’ or ‘<’ choose the time lag
- 5s
- 2min 20s
- 17min
- 2h 20min
- confirm your choice with the ‘SET’ button

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Setting the communication address.
- with ‘>’ or ‘<’ choose the Communication address menu
- press the ”SET” button, you will see the prompt at the end of the line
- change the setting with ‘>’ or ‘<’
1÷ 247 – PSU’s address during communication with the computer
- confirm your choice with the ‘SET’ button
3.4.3 Desktop.
The facility is only available after entering the correct user’s or installer’s password.
.
The ‘Desktop’ menu enables setting the current date, time, brightness, contrast and the language of
messages. Setting the correct date and time is important for keeping chronology of events stored in the memo.
Setting the brightness and contrast guarantees the quality of the displayed messages.
Fig. 14. 'Desktop' screen.

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Setting the language of messages.
- with ‘>’ or ‘<’ choose the Language menu
- press the ”SET” button, you will see the prompt at the end of the line
- with ‘>’ or ‘<’ choose the language of messages
- confirm your choice with the ‘SET’ button
Setting the date.
- with ‘>’ or ‘<’ choose the Date menu
- press the ‘SET’ button,
the prompt will appear at the year digits
- with ‘>’ or ‘<’ set the year
- press the ‘SET’ button,
the prompt will move to the month section

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- with ‘>’ or ‘<’ set the current month
- press the ‘SET’ button,
the prompt will move to the day section
- with ‘>’ or ‘<’ set the current day
- approve the settings with the ‘SET’ button
Setting the time.
- with ‘>’ or ‘<’ choose the Time menu
- press the ‘SET’ button,
the prompt will appear at the digits of hours
- with ‘>’ or ‘<’ set the hour
- press the ‘SET’ button,
the prompt will move to the minute section
- with ‘>’ or ‘<’ set the minutes
- press the ‘SET’ button,
the prompt will move to the second section
- with ‘>’ or ‘<’ set the seconds
- approve the settings with the ‘SET’ button
Setting the highlighting.
Intensity of the LCD highlighting (brightness) can be adjusted within the range of 0 to 100% with a 10%
step. The display features a function of constant or temporary highlighting. In the mode of time highlighting the
screen blanking is on after 60 seconds counting from the last pressing of the button on the panel. To set the
intensity with the screen blanking, the following procedure is to be followed:

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- with ‘>’ or ‘<’ choose the Highlight. menu (abbr. Highlighting)
- press the ‘SET’ button, the prompt will appear next to the constant< option
- with ‘>’ or ‘<’ change the setting into 60 s
- press the ‘SET’ button, the prompt will move to the end of the line
- with ‘>’ or ‘<’ set the demanded screen brightness
- approve your choice with the ‘SET’ button
Setting the contrast.
- with ‘>’ or ‘<’ choose the Contrast menu
- press the ‘SET’ button, the prompt will appear at the end of the line