KERN & SOHN SU 130 - Manual (Page 2)

Sauter GmbH
Ziegelei 1
D-72336 Balingen
E-Mail: [email protected] Tel: +49-[0]7433- 9933-199
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
Instruction Manual
SU
SU-BA-e-1311 2
Optional Accessories: Sound level meter calibrator
(ASU- 01) Cable and software
for RS 232C (ATC 01)
External relay, AC adapter
3. Front panel description
3-1 Calibration Mark
3-2 Time Weighting
3-3 Memory state
3-4 Mark for
3-5 Weighting Icon
3-6 Function Mark
3-7 Battery indicator
3-8 Max Hold
3-9 Number memorized
3-10 Browsing Icon
3-11 Microphone
3-12 Display
3-13 Alarm LED
3-14 Weighting key
3-15 Fast/Slow key
3-16 Up/Save key
3-17 Down/Read key
3-18 Function key
3-19 Max Hold key
3-20 Power key
3-21 Delete/Menu
3-22 Cal. Adjusting
3-23 Jack for RS 232C interface
3-24 Jack for output
3-25 Jack for AC
3-26 Battery compartment / cover
4. Measuring procedure
4.1 The key 3-20 has to be pressed and released to
switch on the instrument.
4.2 It has to be checked whether the function selected is
right. If not, it can be changed by pressing the key
3-18.
The default setting is Lp, weighting A, Fast.
Lp – current sound pressure level
Leq – Equivalent Continuous A Sound pressure Level, i.e.
arithmetically mean value in a period of time set.
Ln – Statistic analysis, i.e. which percentage of all
measurement values is larger than or equal to the alarm
value set by the user. For setting the alarm value, please
see chapter 7.
4.3 It has to be checked whether the weighting is right. If
not, it can be changed by pressing the key 3-14 to
select “A”, “C” or “Flat”.
With the “A” weighting selected, the frequency response of
the device is similar to the response of the human ear. “A”
weighting is commonly used for environmental or hearing
conversation programs such as OSHA regulatory testing
and noise Ordinance law.
“C” weighting is a much flatter response and is suitable for
the sound level analysis of machines, engines etc.
Note: Weighting “A” will be automatically selected
when measuring “Leq”.
4.4 The key 3-15 has to be used to select a Fast
(125ms) or a Slow (1 second) response time.
Fast has to be selected to capture noise peaks and noises
that occur very quickly.
Slow response has to be selected to monitor a sound
source that has a consistent noise level or to average
quickly changing levels. Slow response is selected for
most applications.
4.5 The reading is the highest one if the icon “max”
appears on the display. The reading is an instant value if
“max” does not appear. This appearance is controlled by
pressing the key 3-19 during the process of
measurement.
5. Storing and recalling readings
5.1 In state, the reading can be saved to the instrument
together with measuring conditions by pressing the
key 3-16. Then the icon changes to state
automatically, while the number of memorized readings
increases for 1.