Rion UN-14 User manual

3-20-41 Higashimotomachi, Kokubunji, Tokyo 185-8533, Japan
http://www.rion.co.jp/english/
INSTRUCTION MANUAL
SOUND LEVEL METER UNIT
UN-14

i
Organization of this manual
This manual describes the features, operation, and other aspects of the Sound Level
Meter Unit UN-14. If the unit is used together with other equipment to congure a
measurement system, consult the documentation of all other components as well.
The section starting on page iii contains important information about safety. Be sure
to read and observe these precautions in full.
This manual contains the following sections.
Outline
Gives basic information about the unit and contains a block diagram.
Names of Parts and Functions
Briey identies and explains the front panel display and controls, rear
panel connectors and all other parts of the unit.
Linking
Explains how to congure multiple units as a system.
Power Supply Connection
Explains how to make connections for powering the unit.
Microphone Connection
Lists the types of microphones that can be used, and describes how to
connect them.
Output Connections
Explains how to use the connectors on the rear panel.
Operation Modes
Explains the operation modes necessary for measurement, including input
setup mode, measurement mode, and calibration mode.

ii
* Company names and product names mentioned in this manual are
usually trademarks or registered trademarks of their respective owners.
Performance Characteristics
Contains charts that show the frequency weighting characteristics,
characteristics of the high-pass filter and low-pass filter as well as the
influence of extension cables.
Specications
Lists the technical specications of the unit.
Reference Material
Provides an explanation of group delay, microphone measurement range,
user lters, and maintenance parts.

iii
FOR SAFETY
In this manual, important safety instructions are specially marked as shown
below. To prevent the risk of severe damage to the unit or peripheral equipment,
make sure that all instructions are fully understood and observed.
Caution
Important
Disregarding instructions
printed here incurs the risk of
injury to persons and/or damage
to peripheral equipment.
Disregarding instructions
printed here incurs the risk of
damage to the product.
Mentioned about the tips to
use this unit properly. (This
messages do not have to do
with safety.)
Note

iv
To conform to the EU requirement of the Directive
on Waste Electrical and Electronic Equipment,
the symbol mark on the right is shown on the
instrument.
The product described in this manual is in conformity with the
following standards;
Electrical equipment for measurement control and laboratory use.
RION Co., Ltd.
3-20-41 Higashimotomachi, Kokubunji, Tokyo 185-8533, Japan
This product can be used in any areas including residential areas.

v
Precautions
•Operate the unit only as described in this manual.
• Do not disassemble the unit or attempt internal alterations.
• Observe the following precautions before using the unit:
- Make sure that all connections are properly and safely established.
- Make sure that the unit is operating normally.
• The permissible ambient temperature range for operation and storage of
the unit is −10 to +50°C. Relative humidity must be 90% or below.
• Do not use or store the unit in locations which
- may be subject to strong magnetic elds or strong radiation, or
- may be subject to high levels of dust or splashes of water, or
- may be subject to gases or air with high salt or sulphur content, or
are in the vicinity of stored chemicals, or
- may be subject to high temperature, humidity, or to direct sunlight,
or
- may be subject vibrations or shock.
• Always switch off the power after using the unit.
• When disconnecting cables, always hold the plug or connector and do not
pull the cable.
• Use only the specied AC adapter or other specied power source.
• This is a precision device. Take care not to drop the unit and protect it
from shocks.
• The LCD panel of the unit can easily become scratched. Do not tap the
panel with a pointed object such as a pencil, screwdriver, etc.
• In case of malfunction, do not attempt any repairs. Note the condition of
the unit clearly and contact the supplier.
• When disposing of the unit, follow national and local regulations regarding
waste disposal.

vi
Contents
FOR SAFETY............................................................................... iii
Precautions......................................................................................v
Outline............................................................................................1
Names of Parts and Functions ........................................................4
Front panel ................................................................................4
Rear panel .................................................................................6
LCD panel ................................................................................7
Operation panel ........................................................................9
Top panel ................................................................................ 11
Bottom panel ..........................................................................11
Linking ........................................................................................12
Linking procedure ..................................................................12
Removing the cable from the link connector ........................... 17
Linking with Battery Unit BP-17 ............................................ 18
Using a single UN-14 unit .......................................................19
Linking with Interface Unit UV-22 .........................................20
Power Supply Connection .............................................................21
Using an AC adapter ...............................................................22
Using the Battery Unit BP-17 ..................................................23
Microphone Connection ...............................................................26
Selecting and installing a microphone ....................................26
Possible microphone/preamplier/extension cable combinations ..28
Output Connections ......................................................................30

vii
Operation Modes ..........................................................................31
Input setup mode ....................................................................31
Sensitivity setting ..............................................................32
1) Direct input of sensitivity setting ...................................32
2)
Calibration with Sound Calibrator NC-75/NC-74
or Pistonphone NC-72A ................................................... 36
3) TEDS communication mode .........................................41
Setting the ID number ............................................................42
Measurement setup mode ........................................................44
Calibration mode (OUTPUT CAL) .........................................46
Measurement mode .................................................................47
Overload indicator LED ....................................................48
Bar graph indication ..........................................................48
Relationship between AC OUT signal voltage
and sound pressure level ....................................................49
DC OUT signal .................................................................50
Check mode ............................................................................51
Using the Interface Unit UV-22 (option) .................................52
Factory default settings ...........................................................54
Performance Characteristics .........................................................55
Frequency response characteristics .........................................55
Inuence of extension cable EC-04 series ...............................56
Specications ...............................................................................57
Reference Material .......................................................................62
Delay of output signal..............................................................62
Measurement Range ...............................................................63
User Filter ...............................................................................64
Maintenance parts ...................................................................66

viii

1
Outline
The UN-14 is a single-channel sound level meter unit designed for connection
of a measurement microphone and preamplier. The chassis of up to 16 units
can be linked to create a multi-channel conguration.
Two types of input connectors are provided (7-pin and BNC), providing
support for the following types of microphones and preampliers.
7-pin connector
Allows connection of Rion microphones (except UC-34P).
Bias voltages of 200 V, 60 V, and 30 V DC are supported.
BNC connector
Allows connection of CCLD type preampliers and microphones. Power
supply specications are 24 V DC, 4 mA. TEDS is also supported.
Other features of the unit are a backlit LCD panel, alarm LEDs,
operation panel, AC and DC output connectors (BNC), DC IN jack,
and link connector.
The following accessories are available as options, allowing the conguration
of advanced measurement systems suited to various requirements.
Vibration Meter Unit UV-15
Single-channel vibration meter unit designed for connection of
piezoelectric accelerometers.
In combination with the UN-14, a multi-channel sound level and
vibration measurement system can be congured.

2
Outline
Battery Unit BP-17
Designed to hold eight IEC R14 (size C) batteries, this unit can be
linked to the UN-14 and/or UV-15 to provide power.
The power switch on the front panel of the BP-17 can be used to
switch the entire system on and off.
The optional AC adapter NC-97 series (for up to 10 units) or NC-99
series (for up to 16 units) can be used to provide power.
When powering the system from batteries, the maximum number
of units is three.
Interface Unit UV-22
Linking the UV-22 allows connection to a computer for controlling
the sound level and vibration measurement system and for transfer
of measurement data.
Both USB and Ethernet connections are supported.

3
Outline
UN-14 Block Diagram
AMP 1
AMP 2
AMP 5
AMP 6
CCLD 24 V 4 mA
TEDS
A/D D/A
CPU
DSP
I/O OVERLED EEPROM LCD
AC OUT
DC
OUT
BNC connector
(Rear panel)
7-pin connector
(Front panel) Preamplier power supply±12 V
Microphone bias power supply
30 V/60 V/200 V DC
9 V to 15 V DC
Power supply
Battery Unit
BP-17
Microphone bias power supply
30 V/60 V/200 V DC
±12
V
+3.3
V
+5
V
+1.8
V
+24
V
SENSE
AMP 1
SENSE
AMP 3
SENSE
AMP 2
SENSE AMP 4
AMP
3
AMP
4
ATT
1
ATT
2
OVER
OVER

4
Names of Parts and Functions
Front panel
Sub LED
Lights up in green when the Master/Slave function is used.
(The Master/Slave function is available only in conjunction with the UV-22.)
Overload indicator LED
Lights up in red when saturation occurs in the internal amplier circuitry.
In such a case, correct measurement is not possible.
Microphone input connector
Serves for connection of the microphone/preamplier. Use an EC-04
series cable for this connection.
Caution
Do not touch the connector pins with wire
or similar, because this involves the risk of
electric shock.
INPUT
SOUND LEVEL METER UNIT
UN-14
LCD panel
CAL
DISPLAY
INPUT
MEAS
RANGE
ACZ
SETUP
Operation panel
Microphone input connector
Overload indicator LEDSub LED

5
Names of Parts and Functions
Operation panel
Control keys for measurement mode (level range selection, display switching
etc.) are located here. (For details, see pages 9 to 10.)
LCD panel
Shows setup information, a bar graph display, numeric readout etc.
When the unit is powered from batteries using the Battery Unit BP-17,
the display backlight is activated for 10 seconds when any key is pressed.
When the unit is powered from an AC adapter, the display backlight is
always on. (For details, see pages 7 to 8.)

6
Names of Parts and Functions
Rear panel
INPUT connector
This connector is designed for connection of a CCLD type preamplier
or microphone. A TEDS compliant preamplier or microphone can also
be connected.
AC OUT connector
Supplies an AC output signal equivalent to the input signal.
DC OUT connector
Supplies a DC output signal equivalent to the input signal.
Name plate
Shows the serial number and other information about the unit.
DC IN jack
Serves for connection of the optional AC adapter or an external DC source.
DC IN
9-15V
+
15
No. 12345678
RION CO.,LTD.
MADE IN JAPAN
INPUT
(CCLD/
TEDS)
AC OUT
DC OUT
INPUT connector
AC OUT connector
DC OUT connector
DC IN jack
Name plate

7
Names of Parts and Functions
LCD panel
REAR CCLD/TEDS indicators
Show whether REAR CCLD or REAR CCLD TEDS have been selected
for the input.
FRONT indicator
Shows whether FRONT has been selected for the input.
ID number indication
Serves to identify the unit in a multi-channel conguration. The number
display range is 1 to 16.
ACOUST/CAL indicators
Pressing the CAL key on the operation panel activates the calibration
mode (OUTPUT CAL) for calibration of external equipment. Pressing
the INPUT key in this condition activates the calibration mode (ACOUST
CAL) for acoustic calibration of the microphone. Pressing the CAL key
once more returns the unit to the measurement screen.
RANGE/SENS indicators
When the numeric readout shows the level range, the RANGE indicator
is on. When the numeric readout shows the sensitivity, the SENS indicator
is on. When the numeric readout shows the measurement value, both
indicators are off.
FRONT indicator
Numeric readout
Bar graph
HPF indicator
LPF indicator
ID number indication
REAR
CCLD/TEDS indicators ACOUST/CAL indicators
RANGE/SENS indicators
Unit indicator
Time weighting indicators
F/S/10 ms
Arrow indicators

8
Names of Parts and Functions
Unit indicator
Shows the unit for the measurement value or level range.
Time weighting indicators F/S/10 ms
Show the selected time weighting characteristics.
F: FAST, time constant 125 msec
S: SLOW, time constant 1 sec
10 ms: Time constant 10 msec
Arrow indicators
Below these arrows are labels for the frequency weighting characteristics
A, C, and Z. The arrow for the currently selected characteristic is visible.
LPF indicator
Shows the selected low-pass lter setting.
HPF indicator
Shows the selected high-pass lter setting.
Bar graph
Shows the level of the signal as a bar graph indication.
Numeric readout
Shows the measurement value, level range, sensitivity, error information, etc.
Measurement value display range: 0.0 dB to 170.0 dB in 0.1-dB steps
Level range: 70 dB to 160 dB in 10-dB steps
Sensitivity: −59.9 dB to −10.0 dB in 0.1-dB steps
Frequency weighting characteristics
Frequency weighting characteristic
indicated by arrow ( )
Select with RANGE keys
SOUND LEVEL METER UNIT
UN-14
SETUP
ACZ

9
Names of Parts and Functions
Operation panel
MEAS key
This key serves to select settings for the following input related items.
Time weighting characteristics F/S/10 ms
Frequency weighting characteristics A/C/Z
HPF (High-pass lter) setting
LPF (Low-pass lter) setting
RANGE keys
During measurement, these keys serve to select the level range. In the
setup mode, the keys serve to change a setting.
DISPLAY key
During measurement this key serves to switch the numeric readout between
range indication and measurement value indication.
CAL key
Pressing this key causes the AC OUT and DC OUT connectors on the rear
panel to supply a calibration signal for calibration of external equipment.
Sensitivity calibration using an acoustic calibrator (sound calibrator) in
the ACOUST CAL mode is also possible.
INPUT
SOUND LEVEL METER UNIT
UN-14
CAL
DISPLAY
INPUT
MEAS
RANGE
ACZ
SETUP
MEAS key
RANGE keys
INPUT key
CAL key
DISPLAY key
A/C/Z indicators

10
Names of Parts and Functions
INPUT key
Serves to select settings for the following input related items.
Input selection: FRONT or REAR
Start receiving TEDS sensor data
Sensitivity setting
ID number setting
A/C/Z indicators
Show the frequency weighting characteristics selected with the RANGE
keys.
SOUND LEVEL METER UNIT
UN-14
SETUP
INPUT
MEAS
ACZ
Frequency weighting characteristics
Arrow ( ) for selected frequency
weighting characteristics ashes
("C" in illustration)
Select with RANGE keys