TESTO 816 User manual

Bedienungsanleitung de
Instruction Manual en
testo 816
Sound Level Meter

20 General Information
General Information
Please read this documentation through carefully and familiarise
yourself with the operation of the product before putting it to use.
Keep this document to hand so that you can refer to it when
necessary.
Identification
Symbol Meaning Comments
Warning advice: Warning! Read the warning advice
Serious physical injury could be caused if the carefully and take the
specified precautionary measures are specified precautionary
not taken. measures
Warning advice: Caution! Read the warning advice
Slight physical injury or damage to equipment carefully and take the
could occur if the specified precautionary specified precautionary
measures are not taken. measures
Important Please pay particular
attention.
Key Press the key.
Text, Display contents Text or symbol is shown on
the display.
Taste

21
Contents
Contents
General Information ........................................................20
Contents ........................................................................21
1. Safety Advice..................................................................22
2. Intended Purpose ..........................................................23
3. Product Description ........................................................24
3.1 Display and operating elements ........................................................24
3.2 Supply voltage ..................................................................................24
4. Initial Operation ..............................................................25
4.1 Putting in the battery ........................................................................25
5. Operation ......................................................................25
5.1 Switching on/off ................................................................................25
5.2 Setting the meter ..............................................................................25
5.3 Measuring ........................................................................................29
5.4 Calibration ........................................................................................31
6. Care and Maintenance....................................................32
6.1 Changing the battery ........................................................................32
6.2 Microphone ......................................................................................32
6.3 Meter ................................................................................................32
7. Technical Data ................................................................33
8. Accessories and Spare Parts ..........................................34
9. Measurement Engineering Fundamentals........................35

22 1. Safety Advice
1. Safety Advice
Avoid electrical hazards:
Never use to measure on or near live parts!
Product safety/preserving warranty claims:
Operate the meter only within the parameters specified in the
technical data. Do not use force.
Never store with solvents (e.g. acetone).
Observe maximum storage and transport temperature as well
as operating temperature.
Ensure that liquid does not enter into the microphone.
Open the meter only when this is expressly described in the
Instruction Manual for maintenance purposes.
Carry out only the maintenance and repair work that is
described in the Instruction Manual. Follow the prescribed
steps exactly. For safety reasons, use only original spare parts
from Testo.
Warranty claims will no longer apply if the meter is handled
improperly or force is applied.
Ensure correct disposal:
Dispose of defective rechargeable batteries and spent
batteries at the collection points provided.
Send the meter directly to us at the end of its life cycle. We will
ensure that it is disposed of in an environmentally friendly
manner.
As declared in the certificate of conformity, this product fulfils
the guidelines of 89/336/EEC.
Meter conforms with DIN EN 60651 (IEC 651), Class 2.

23
2. Intended Purpose
2. Intended Purpose
testo 816 is a sound meter with the sound level measurement
ranges 30-80dB, 50-100dB and 80-130dB, automatic range
switchover, two time weightings, two frequency weightings, a
maximum/minimum function, display light and a tripod screw.
Using the calibrator (accessory), the meter can be recalibrated
with the enclosed adjustment screwdriver.

24
3. Product Description
3.1 Display and operating elements
3.2 Supply voltage
Voltage is supplied by a 9V block battery Type 006 P or IEC6F22
or NEDA 1604 (included). If a battery is not inserted, it is possible
to supply voltage via an external mains unit.
3. Product Description
Display
Microphone
On/Off
button
Fast/Slow
button
Light
button
Min/Max
button
A/C
weighting
Level
button
Battery
compartment
(rear)
Calibration screw
8V input
AC/DC output
Tripod thread

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4. Initial Operation
4.1 Putting in the battery
1Open battery compartment at the back of the instrument.
2Insert 9V block battery. Ensure +/- is correct.
3Close battery compartment.
5. Operation
5.1 Switching on/off
Switch on meter: press .
- All segments light up briefly and the meter switches to the
measurement mode (measurement range 50 - 100dB).
Switch off meter: press .
5.2 Setting the meter
The following functions can be set:
Function Description Setting options
Time weighting Sets measurement time Fast or Slow
Frequency weighting Sets weighting Aor C
Level Switches over 30 to 80dB
measurement range 50 to100dB
80 to 130dB
30 to 130dB (Auto range)
Hold function Switches on MAX / MIN
Max Hold/Min Hold Function
Light Switches on display light On/Off
4. Initial Operation

26
Setting the time weighting
The measurement time (time weighting) is set by pressing .
SLOW/FAST:
The ranges "Slow" with a time weighting of 1s and "Fast" with a
time weighting of 125ms are available. Incoming sound signals
are integrated in a time period from 1s or 125ms respectively.
When "Fast" is set, the display rate of a reading increases to
approx. 5-6 measurement rates per second. The "Slow" time
weighting is selected for noises whose signals only change slowly
e.g. machines, photocopiers, printers etc. Select the "Fast" mode
to measure sudden changes in sound level (e.g.building
machines).
Setting the frequency weighting
Frequency weighting is set with the button.
A/C:
The frequency weightings "A" and "C" are available. Frequency
weighting A is used for standard sound level measurements. This
weighting corresponds to the sound pressure felt by the human
ear, also referred to as "aurally compensated sound level". If the
low frequency levels of a sound are to be assessed, frequency
weighting C is used. If the displayed value is considerably higher
during the C weighting than during the A weighting, the level of
low frequency noise is high.
5. Operation

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Setting the measurement range
The measurement range is switched using the button.
Level:
The testo 816 sound level meter covers the range 30 to 130 dB.
The measurement ranges 30 to 80, 50 to 100 and 80 to 130 dB
are available as well as an Auto Range function. The meter is in
the middle measurement range 50 to 100 dB when first switched
on. The measurement range is switched each time to a higher
level by activating the "LEVEL" button: 50...100dB 80...130dB
Auto range. You can switch back into the lowest range 30 to 80
dB from the Auto Range mode.
MAX/MIN - Hold Function
Use the button to activate the Max Hold or Min Hold
function. "Max" appears in the display once the "Max/Min" button
is activated. In this mode, the meter shows the maximum value of
the sound level since the max mode was set. The display is only
updated if a higher value than the previously displayed value is
measured. The meter goes into the Min-Hold mode when the
"Max/Min" button is activated again. "Min" appears in the display.
The display is only updated if the sound level is below the
displayed value. Max/Min flashes in the display if the "Max/ Min"
button is activated again. The current value is displayed and the
maximum or minimum value is stored in this mode. The maximum
or minimum value is displayed by again activating the "Max Min"
button. The "Max Min" button must be kept pressed for two
seconds in order to quit the Max Min mode.
The Max-Min mode is cancelled by activating the Level,
Fast/Slow or A/C button.
5. Operation

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Switching light on/off
The display light is switched on by pressing the button.
The light is switched off again by pressing the button again.
Auto Off function
When switched on, the meter is in the automatic off mode (Auto
Off Function). The meter switches off automatically after 30
minutes if no button has activated during this time. This function
is symbolised by the clock in the display. You can deactivate this
function by keeping the button pressed when switching on
the meter. A clock symbol then does not appear in the display.
AC/DC output
The testo 816 meter has an AC/DC output with the following
specifications:
AC: 1 V RMS at end-scale deflection
Output impedance approx. 100 Ohm
Output signal through standard 3,5mm jack connector
(see figure below).
Note: If the meter measures in the Auto Range function,
the output signal corresponds to the automatically
selected measurement range.
DC: Output 10mV/dB
Output impedance 1 kOhm
Output signal through standard 3.5mm jack connector
(see Figure below).
5. Operation
AC signal Earth
DC signal