HERA – user manual
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Order Code for this manual : 90 40 20 0000 20
TRADE MARKS
APEX trade mark is owned by APEX N.V.
Microsoft and Windows are trade marks owned by Microsoft Corporation.
HyperTerminal trade mark is owned by Hilgraeve Inc.
All other brand, product and company names and any other registered names or trade marks
mentioned in this manual belong to their respective owners.
COPYRIGHT
Authored by Renaud Schoonbroodt.
English translation by Nick Franks.
Copyright © 2001 APEX N.V. Copyright and all other rights reserved.
This manual may not be reproduced or transmitted, either in part or as a whole, by any means,
be they mechanical or electronic, without the express written permission of APEX N.V.
DISCLAIMER
The information provided in this document may be modified at any time without prior
warning. APEX N.V. has taken all possible steps to ensure that the information given here is
both correct and complete. In no event can APEX accept any liability or responsibility for any
loss or damage to the owner of the equipment, any third party, or any equipment which may
result from use of this manual or the equipment which it describes.
Any complaint against APEX N.V. shall be governed by the laws of Belgium.
FIRMWARE
This manual describes HERA internal software version 2.1.
THANKS
Jean-Noël ELOUALI (Audia – France)
Jean CUSTERS (Technica Del Arte – The Netherlands)
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CONTENTS
CONTENTSCONTENTS
CONTENTS
INTRODUCTION
INTRODUCTIONINTRODUCTION
INTRODUCTION
4
44
4
APPLICATIONS 4
THE STARTING POINT
THE STARTING POINTTHE STARTING POINT
THE STARTING POINT
5
55
5
UNPACKING 5
INPORTANT SAFETY NOTES 5
THE DEALER MENU 5
FRONT AND REAR PANEL DESC
FRONT AND REAR PANEL DESCFRONT AND REAR PANEL DESC
FRONT AND REAR PANEL DESCRIPTION
RIPTIONRIPTION
RIPTION
6
66
6
FRONT PANEL 6
REAR VIEW 7
INSTALLATION AND CONNECTION
INSTALLATION AND CONNECTIONINSTALLATION AND CONNECTION
INSTALLATION AND CONNECTION
8
88
8
INSTALLATION INSTRUCTIONS 8
CONNECTING THE HERA WHEN USED AS A STAND-ALONE DEVICE 8
CONNECTION WHEN THE HERA IS USED TOGETHER WITH THE ARGOS 9
PRINCIPLES OF OPERATION
PRINCIPLES OF OPERATIONPRINCIPLES OF OPERATION
PRINCIPLES OF OPERATION
10
1010
10
ADDITIONAL FUNCTIONS WHEN USED AS A FREE-STANDING DEVICE 10
SPECIFIC FUNCTIONS WHEN USED WITH THE ARGOS 10
START UP
START UPSTART UP
START UP
11
1111
11
NOTE ON POWERING-UP 11
TURNING ON 11
STANDARD USE
STANDARD USESTANDARD USE
STANDARD USE
11
1111
11
CLOCK MODE 12
MEASUREMENT MODE 13
ERROR MODE 13
CONNECTION WITH A PC 14
PRINCIPLES 14
CONNECTING 14
INSTALLING HYPERTERMINAL 14
PREPARING THE CONNECTION 16
DATA TRANSFER 18
BACKSCROLL BUFFER LINES 19
USING THE DATA IN ANOTHER APPLICATION 19
SERVICE AND MAINTENANCE
SERVICE AND MAINTENANCESERVICE AND MAINTENANCE
SERVICE AND MAINTENANCE
20
2020
20
CLEANING 20
REPLACING THE FUSE 20
REPAIR 20
YOUR COMMENTS
YOUR COMMENTSYOUR COMMENTS
YOUR COMMENTS
20
2020
20
SERVICE REQUEST
SERVICE REQUESTSERVICE REQUEST
SERVICE REQUEST
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2121
21
GUA
GUAGUA
GUARANTEE
RANTEERANTEE
RANTEE
22
2222
22
TECHNICAL SPECIFICATIONS
TECHNICAL SPECIFICATIONSTECHNICAL SPECIFICATIONS
TECHNICAL SPECIFICATIONS
23
2323
23
IMPORTANT NOTES CONCERNING EMC
IMPORTANT NOTES CONCERNING EMCIMPORTANT NOTES CONCERNING EMC
IMPORTANT NOTES CONCERNING EMC
24
2424
24
EMC
EMCEMC
EMC
: DECLARATION OF CONFORMITY
: DECLARATION OF CONFORMITY: DECLARATION OF CONFORMITY
: DECLARATION OF CONFORMITY
25
2525
25
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INTRODUCTION
APPLICATIONS
APEX HERA can be installed in any location where control of sound pressure level is
required. Although it can be used by itself, HERA is mainly intended to be used in
conjunction with the APEX ARGOS limiter. HERA provides various functions which enable
compliance with laws governing sound pressure levels in public places.
The HERA works in a similar way to a sound level meter, measuring sound pressure level on a
continuous basis. In addition the HERA memorises the average and maximum sound levels,
measured on an ongoing basis. It also memorises any events or changes in the installation,
allowing external monitoring of whether anyone has tried to modify the levels or disconnect the
system. All this information can be stored in a computer via a serial link.
When used in conjunction with the ARGOS, the HERA provides greater control over its
functions - for example, precise adjustment of limit threshhold, compensation for the
difference in level between the position of the microphone and the dance floor, and so on.
When used as a stand-alone device, the HERA can activate relays which can be used for
signalling excess sound pressure levels and/or shutting off power when levels exceed the
maximum allowed.
An optional large format display allows sound level pressure to be viewed up to several dozen
metres from the HERA. This can be used, for example, as an indicator for the DJ, the club
manager, or simply to make the club clientele aware of the sound level.
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THE STARTING POINT
UNPACKING
Check that the following list of items is found in the box :
• the HERA;
• a microphone;
• power cord;
• multi-conductor data cable;
• this manual.
IMPORTANT SAFETY NOTES
Apex HERA is intended for professional applications. Since you are a professional, you will
certainly be familiar with the use and installation of this type of equipment. Nevertheless, we
would like to remind you of certain precautions which should always be taken.
• Keep this manual in a safe place so that it can be referred to in future as and when required.
• Avoid dust and humidity and see to it that the location of the appliance does not interfere
with its proper ventilation.
• The appliance should not be positioned near a source of heat (for example, a power
amplifier).
• If the equipment is mounted in a flight case, secure it properly.
• All electrical connections must be made properly and in a safe and professional manner.
The HERA must be earthed.
• The appliance should be unplugged from the AC mains supply when left unused for a long
period of time.
• The appliance should be cleaned and maintained using only the methods recommended by
the manufacturer (see 'Maintenance and Service' in this manual).
• The equipment must be serviced by an APEX-approved service engineer, especially if any
objects or liquids have entered the unit; if the unit does not appear to operate normally or
shows a noticeable change in performance; and if the unit has been dropped or the
enclosure has been damaged.
THE DEALER MENU
Frequent reference is made in this manual to the dealer menu. This menu can only be
accessed using a secret code, and it allows the operator to set up and calibrate the device.
Explanations on how to use the dealer menu are found in an appendix to this manual. This
appendix is intended only for the installer and should not be made available to the end user.
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FRONT AND REAR PANEL DESCRIPTIONS
FRONT PANEL
1 LED display
RMS, LEQ, MAX,… level display
2 LCD display
This display is used in conjunction with the rotary encoder
and the pushbuttons. It shows settings, adjustments and
provides a readout of control-data.
3 Rotary Encoder
Used to change settings and to navigate through menus
and lists.
4 Push button ‘dB Mode’ / ’enter’
5 Push button ‘clock’ / ‘undo’
6 Push button ‘measure’ / ‘next’
7 Push button 'errors' / ‘exit’
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REAR VIEW
8 AC connector and fuse
9 Relay outputs
WARNING: under no circumstances should mains AC
votalge be plugged into these outputs.
The connections are (seen from left to right): ground,
power cut relay, warning relay, + 12 Vdc.
For an example of how to connect the device, see the
next page.
10 Extension connector
This connector must ONLY be used for connection with
the ARGOS.
11 RS-232 PORT
Enables connection with an external computer in order to
read the HERA’s memory.
12 External I²C bus external
This connector allows an (optional) external display to
be connected. This display would mimic the information
shown on the front-panel LED display (1).
13 'To Argos Mic' connector
This connector must ONLY used for connection with the
ARGOS.
14 Microphone input
Connect THE MICROPHONE SUPPLIED WITH THE
HERA here.
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INSTALLATION AND CONNECTION
INSTALLATION INSTRUCTIONS
Although the HERA is intended for installation in a standard 19-inch rack it can nevertheless
be used free-standing. If the HERA is stored in a flight case while being transported, ensure
that the unit is properly secured in order to avoid damage. In all cases ensure that the
equipment is properly ventilated.
Keep the HERA away from shocks and vibration. Avoid humidity, large temperature changes
and dust when siting the device.
HERA will work with any AC voltage between 90 V AC and 240 V AC and any mains
frequency between 50 and 60 Hz. No AC Voltage selector is provided as the device
automatically adjusts to the incoming AC voltage.
CONNECTING THE HERA WHEN USED AS A STAND-ALONE DEVICE
Connect the microphone supplied with the HERA to the microphone input located on the rear
panel (see rear panel drawing). The relays can be connected using the connector labelled
‘RELAY OUTPUTS’. Only use 12V DC relays. No external power supply is required, so do
not connect any form of power to the HERA’s relay outputs.
The different signals available at the connector are :
Pin 1 Pin 2 Pin 3 Pin 4
Ground POWER CUT relay WARNING relay + 12 V dc
This numbering is arranged looking at the rear panel, from left to right.
Example of relay output usage :
Hera
internal
4
3
2
1
+ 12 Vdc
To audio
equipment
supply
RELAIS
outputs
L
N
230 V~
Warning
lamp
Power cut
lamp
12 Vdc Relay
GND
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CONNECTION WHEN THE HERA IS USED TOGETHER WITH THE ARGOS
Disconnect the ARGOS and the HERA from the mains AC supply. Connect the microphone
supplied with the HERA to the microphone input socket located on the rear panel of the
HERA. Connect an XLR cable from the connector marked ‘To ARGOS MIC input’ on the
HERA to the microphone input on the ARGOS. Connect the data cable to the ‘To ARGOS
EXT. Conn’ socket on the HERA to the connector marked ‘TO EXTENSION’ on the
ARGOS.
The data cable is type DB15 male to DB15 female cable pin to pin in direct numbering
sequence, I.E.E 1 to 1, 2 to 2, and so on up to 15). The XLR cable should be connected in the
same manner. Be very careful NOT TO CONNECT the earth to the chassis and definitely be
especially careful not to make any solder links between pin 1 and the metal chassis of the
socket. The wiring protocol is 1 = GROUND, 2 = HOT, 3 = COLD).
NOTE: in order to make level measurement as precise as possible, the HERA and the
microphone supplied with it are calibrated together in the factory. Always ensure that you use
the MICROPHONE SUPPLIED WITH THE HERA !
The ARGOS must be set up as follows:
• ‘Source’ switch in ‘micro’ position;
• the setting of the THRESHOLD potentiometer is not important because the threshold is
fully controlled by the HERA;
• 'Speed' switch on 'slow';
• 'Noise' switch on 'OFF'.
• For the 'Hold' switch, choose the setting most appropriate for your application (see the
ARGOS manual for more information).
TO EXTENSION
HERA
ARGOS
To ARGOS
EXT. Conn.
RELAIS outputs
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PRINCIPLES OF OPERATION
The HERA can be used with the ARGOS or as a stand-alone unit. In both cases, the
appliance:
• Shows the current sound level, the average value calculated over a period of 10 seconds,
1 minute, 15 minutes or the highest level. A giant sound pressure level display is
optionally available which can be sited next to the DJ or in an office.
• Stores a record of the average and maximum sound pressure level every 15 minutes for a
maximum period of 15 days. When the 15 day period is exceeded the newest
measurements will replace the oldest, thus updating the 15-day maximum on an ongoing
basis.
HERA can also detect if anyone has disconnected any cables from it, or even if anyone has
opened the lid which prevents access to the ARGOS adjustement. Should any of these events
take place it is automatically stored in the list of errors and events. This list, and the record of
sound pressure levels, can be inspected at any time by the user and can even be transferred to
a computer. It is thus extremely easy to see if anyone has tried to cheat !
ADDITIONAL FUNCTIONS WHEN USED AS A FREE-STANDING DEVICE
The HERA has two outputs which provide control over two external relays. The first is for
signalling (warning output) and the second when operated shuts off the electrical power (cut
off output). These relays are activated after the Threshold has been exceeded. The duration
of the excess period can be set separately for the two outputs. The ‘warning’ output is cut off
about one minute after the level has returned below the Threshold. If the power itself is cut
off, there are two ways in which it can be restored:
• using a secret PIN CODE via the dealer menu;
• after a preset time period.
To select either of these two options you must have access to the dealer menu.
If the microphone is disconnected the ‘alert’ relay will operate. If the microphone is not
reconnected within 10 seconds the ‘cut’ relay will activate. Power can be restored by either of
the two methods described immediately above.
NOTE: the output relays only function WHEN THE HERA IS USED AS A STAND-
ALONE DEVICE. When the APEX ARGOS is connected it becomes impossible to exceed
the preset level. Thus relays, either for warning or cut-off purposes, becomes irrelevant..
SPECIFIC FUNCTIONS WHEN USED WITH THE ARGOS
When connected to the ARGOS limiter, the HERA measures the microphone signal and sends
the appropriate commands to the ARGOS, which can then reduce the sound pressure level if
necessary.
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The HERA can also control the pink noise generator in the ARGOS. Pink noise is used as a
reference for calibrating the HERA should it be necessary to take into account differences in
sound pressure level between the actual position of the microphone and the position at which
the authorities measure. The measurement microphone is often located where it cannot be
interfered with. Consequently there is a good chance that the sound pressure level at the
microphone will be different from that on the dance floor, which is where the authorities take
their level measurements. To get round this problem the HERA can calculate the difference
and factor it into its measurements. To calibrate the HERA go to the dealer menu.
START UP
NOTE ON POWERING UP
If the HERA has been stored where it is much colder than the installation site wait an hour or
two before switching it on so that it can reach the ambient temperature.
TURNING ON
The HERA does not have an on/off switch. It lights up when the AC power is connected.
The LCD screen displays the following message:
This message displays the version of firmware.
Contact an APEX-approved dealer for any software updates which may become available.
STANDARD USE
To begin with, a quick look at the front panel…
The 4 LEDs located just above the push buttons have the following functions:
• Red LED ‘error’: lights in the event of any fault. This could, for example, come from the
seal of the ARGOS. If this happens, the message will be stored in the list of errors (cf.
‘error’ mode). The LED will go out several seconds after the problem disappears.
• Green LED ‘link’: when the HERA is properly connected to an ARGOS, this LED shows
that the connection is good. It should be lit up at all times when the ARGOS is in use.
• Yellow LED ‘warning’: lights when the ‘alert’ relay is triggered. This LED only functions
when the HERA is used in stand-alone mode.
• Red LED ‘alarm’: lights when the ‘cut’ relay is triggered. This LED only functions when
the HERA is used in stand-alone mode.
HERA 2.1
APEX @ 2001
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The indicator on the left side of the front panel displays the sound pressure level in dBspl.
This can be preselected using the dB mode switch to show present, average or maximum
value.
• present level Æ RMS;
• average value over 10 seconds Æ LEQf (fast);
• average value over 1 minute Æ LEQn (normal);
• average value over 15 minutes Æ LEQs (slow);
• the peak value Æ MAX.
The display mode is changed by pressing the ‘dB mode’ button. The selection is shown on the
LCD display when in 'clock' mode.
COMMENT: if the sound pressure level falls below the minimum measurable then the
display will show 4 horizontal bars ‘- - - -‘.
The LCD screen has three different display modes:
• ‘clock’ mode;
• ‘measure’ mode;
• ‘error’ mode.
These three modes are selected by pressing one of the three switches labelled ‘clock’
‘measure’ and ‘error.’
Messages on this display can be in english, french, dutch or german. Language selection is
made from the dealer menu.
CLOCK MODE
This is the normal mode.
In this case, the displays will look something like this :
In the left upper corner you find the time displayed in the following format: HH:MM:SS. In
the right upper corner, the date will be displayed in the following format: DD/MM. The
second line indicates the LED display MODE (RMS, LEQf, MAX, …), followed by the
Threshold indicated in dBspl. Above this level the ARGOS will begin to reduce the signal.
This threshold can be adjusted from the dealer menu.
In this mode the Data Encoder knob allows the LCD back-lighting to be adjusted.
08:55:47 07/12
RMS Thres:90 dB
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MEASUREMENT MODE
This mode allows the operator to inspect the average and maximum values stored in 15
minute time slices over the last 15 days. Turn the ‘Data Encoder’ knob to view the different
measurements.
ERROR MODE
Turning the rotary encoder allows the operator to scroll through any errors and events taking
place in the system, showing the date and time at which they occurred. The list of messages,
and their meaning, can also be found here.
If the system generates an error, the ‘error ‘ LED (see the front panel) illuminates. This error
is instantly recorded in the error list. The LED extinguishes when the problem disappears.
Message Meaning
• Log Started Comencement of recording of errors and events.
• Power Switch ON HERA started up.
• Power Switch OFF HERA shut down.
• Micro Disconnect Microphone disconnected from HERA.
• Micro Connected Microphone connected to HERA.
• Argos SealRemove The lid giving access to the ARGOS calibration facilities has been
opened.
• Argos Seal OK The lid giving acess to the ARGOS calibration is in its proper
place.
• Argos Disconnect Data cable between the ARGOS and the HERA disconnected.
• Argos Connected The ARGOS is connected to the HERA.
• Argos Mic. Discon The XLR cable between the ARGOS and the HERA has been
disconnected.
• Argos Mic. Conn. The XLR cable is connected.
• Clip Detection ARGOS VCA (level reducing device) overloaded.
• Dealer setting The HERA adjustment has been modified by the installer.
• Warning Relay ON The ‘Alert’ output relay has been activated.
• Alarm Relay ON The ‘Cut’ output relay has been activated.
• Warn. Relay OFF The 'Warning' relay output have been deactivated.
• Alarm Relay OFF The 'Alarm' relay output have been deactivated.
• Warn. Relay Disc The ‘Warning’ relay has been disconnected.
• Alarm Relay Disc The 'Alarm' relay has been disconnected.
• In Stand alone HERA has been configured to work in stand-alone mode, but will
detect if an ARGOS has been connected.
At: 08:53 07/12
LEQ: 97 MAX: 97
At: 23:03 19/11
Micro Disconnect
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Message Meaning
• Transmis. Start Data transmission to the PC has begun.
• Transmis. End Data transmission to the PC has been completed.
CONNECTION WITH A PC
PRINCIPLES
Connection to a PC allows data stored in the HERA’s memory to be recovered and imported
into any document. It is also possible to transmit the LEQ and MAX data lists, the list of
errors and events, and other information. This data can be used in spreadsheet such as
Microsoft Excel, a Microsoft Word document, a data base, and so on.
The connection can be made via the PC serial port and Hyperterminal software which is
bundled with Microsoft Windows 95, 98, ME, 2000 and XP. You can also download the
'HypeTerminal Private Edition' software from the Hilgraeve Inc site, at: www.hilgraeve.com.
CONNECTING
Below you will find a description of the required cable. It is a 3 conductor cable for serial
communication. You need a Sub-D9 female connector on each side.
Connexion:
HERA side PC side
Sub-D 9 female Sub-D 9 female
pin 1 ground pin 5
pin 3 data pin 3
pin 4 data pin 2
COMMENTS:
1. This cable is specially for the APEX HERA and therefore cannot be found in any computer
shop.
2. This cable is not reversible. One side is for the HERA and the other for the PC.
Connect the HERA side into the HERA RS-232 port (see rear panel diagram) and the PC side
into an unused serial port on the PC. Use a 25-pole standard adapter on the PC side if
required.
INSTALLING HYPERTERMINAL
Hyperterminal is probably already installed on your computer, check in the folder Start/
Programs/Accessories/Communications/Hyperterminal. If not, proceed as follows :
1. Open the Windows control panel: Start/Settings/Control Panel
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2. Double-click on ‘Add/Remove programs’.
3. Choose the tab ‘Windows Setup’.
4. Select 'Communications' then Details.
5. Check the box located just left of the Hyperterminal component and click OK.
6. Click OK in the main window.
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7. Insert the Windows installation CD-ROM and click OK.
8. Hyperterminal is now installed on your computer.
PREPARING THE CONNECTION
To launch Hyperterminal, go to the menu:
Start/Programs/Accessories/Communications/Hyperterminal.
As soon as the programme is launched the ‘Connection Description’ dialogue box appears.
Select a name for your connection (for example, APEX HERA), select an icon from the list
and click OK.
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The dialogue box ‘Connect To’ now appears. In the field ‘Connect using’ choose ‘Direct to
Com 1’ or ‘Com 2’ according to the port you have already used to to connect the HERA.
The final point is to set up the communications port. Use the following values :
Bits per second: 9600
Data bits: 8
Parity: none
Stop bits: 1 bit
Flow control: none
Click OK. Hyperterminal is now ready to communicate with the HERA.
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DATA TRANSFER
Once connection has been established and the software correctly set up, it remains only to tell
HERA what is must do. To recover the data that you require press one of the following key:
• c to get the client’s name;
• d to get HERA date and time;
• e to get the list of errors and events;
• h to get help;
• i to get the firmware version and other info;
• m to obtain the list of measurements;
• t to obtain the actual threshold setting (following the list, or always x dB) as well as the
weekly list of thresholds.
The HERA’s LCD screen displays the following message when it is transmitting data to the
PC :
At all times during data transmission the HERA switches will not operate and any measuring
processes will be suspended. If the ARGOS is connected, limiting will continue. We
strongly advise you not to use the data connection during the opening hours of the venue.
Each transmission is entered into HERA’s list of events by the two following messages:
• Transmis. Start
• Transmis. End
Transmit. Data
Please Wait...
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BACKSCROLL BUFFER LINES
The 'backscroll buffer' of Hyperterminal could be too little. In fact, if you want to download
the entire list of measurements for any 15 day period, this will be at least 1440 lines long.
The default setting of the buffer is 500 lines.
To change the buffer size click on Properties
button then Settings. Change the value in the
field ‘Backscroll buffer lines’, entering
perhaps 1500.
USING THE DATA IN ANOTHER APPLICATION
Exchange of data with another application, such as Microsoft Excel, is done via the use of an
ASCII file. This is a file with a .txt extension. This can be read using Notepad in Microsoft
Windows, or by any other ASCII file editor. To make such a file, complete the following
steps:
Select ‘Capture Text…’ in the drop down menu ‘Transfer’.
The ‘Text Capture’ dialogue box appears. You must select a file in which to place the
information. All data reeceived from the HERA will be copied into this file.
COMMENT: Any data received before the destination File has been set up will not be
stored !
You can now open this file into any application you choose.
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SERVICE AND MAINTENANCE
CLEANING
Regular cleaning will help prevent dust from getting into the HERA. Clean the unit regularly
with a soft cloth. You can also dip the cloth into a mixture of soap and water. Do not use
solvents such as acetone which may damage the paint or plastics. Disconnect the HERA from
the mains before cleaning.
REPLACING THE FUSE
If for any reason the fuse needs to be replaced, use the following procedure.
• DISCONNECT THE DEVICE FROM THE AC MAINS SUPPLY;
• open the fuse holder, which is located under the power connector;
• remove the broken fuse and throw it away;
• replace it with a fuse type T315mA (antisurge fuse) 250Vac (Europe);
• close the fuse holder.
If the device still does not work and the new fuse has blown, take the HERA into an APEX-
approved service centre.
REPAIR
If the HERA needs to be rapaired, complete the form on the following page, cut it out, attach
it to the faulty unit and take it in to an APEX-approved service centre.
WARNING: There are no user-replaceable parts inside the HERA. Always use an APEX-
approved service centre for repairs.
YOUR COMMENTS
If you have comments about the HERA, its design, operating manual or on any other topic,
we would be very happy to hear from you. You can contact us directly or through your local
dealer.
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SERVICE REQUEST
Please copy and complete this form in as much detail as possible and return it to APEX or
your local dealer with the faulty unit.
Name/Company:
Address:
Country:
Phone:
Fax:
E-mail:
Model: Serial number:
Where purchased:
Date:
Please give a detailed description of the problems you are having with the unit:
What were the operating conditions when the fault appeared. At what level ? Temperature ?
Any other factors of note ?
Has this problem shown itself frequently ?
What if anything have you done to find out where the problem is ?
Any other comments
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