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PLA FSMP
Field Strength Meter
USER MANUAL
MAN 204A
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PLM FSMP Field Strength Meter Plus
We would like to congratulate you
on your purchase of a PROLOOP
FSMplus Field Strength Meter. You
have chosen a modern and reliable
system. Please make sure to read
the operating instructions carefully
before using this equipment. They
will provide you with important
information on the safety, use
and operation of the device. The
PROLOOP FSMplus is an ideal
solution for measuring, comparing
and starting up an induction
loop system according to the
requirements of the IEC601184 Norm. The ergonomically
designed, hand-held meter has
two calibrated measuring functions
and two calibrated measuring
functions and two settings for the
evaluation of background noise
and the magnetic strength. You
can use the PROLOOP FSMplus
headphone jack to listen to and
test the loop signal. The PROLOOP
FSMplus comes complete with the
batteries required and an audio CD
with special test signals. The CD
contains dierent sine test signals in
the 100 Hz to 6 kHz range.
Safety Instructions
Use “AA/LR6” batteries only. Do
not expose the meter to water
in any way. Should any water
penetrate into the enclosure, it
may destroy the electronics. Do
not store the de-vice outside. To
clean the meter, wipe it carefully
with a dry cloth – never use any
type of chemicals or water.
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PLM FSMP Field Strength Meter Plus
1. Overview of the connection jacks and operating elements
(1) Color-coded display
of the field strength
(2) On/off indicator
(3) Battery-low indicator
(5) Filter selection switch
(6) Measurement range selection switch
(7) Headphone jack
(8) Volume control for the headphones
(4) On/off switch
Switch setting for the measurement range selection switch (6)
0 dB
>+8
+5
+4
+3
+2
+1
0
-1
-2
-3
-4
-6
-8
-10
-13
<-15
-20 dB
>-12
-15
-16
-17
-18
-19
-20
-21
-22
-23
-24
-26
-28
-30
-33
<-43
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PLM FSMP Field Strength Meter Plus
2. Measurement functions
(-20dB) measurement range for
background noise
Increases the sensitivity of the
deviceand is used to detect
magnetic interference elds. This
function can be used to determine
the crosstalk of
the loops. Measurement range from
-43 to -12 dB.
(0dB) measurement range for
magnetic eld strength
A broadband measurement range
used to check the eld strength that
the induction loop emits.
Filter A
Evaluates the values measured on
the basis of the listening curve of
the human ear.
Filter Norm
Evaluates all the values measured in
the same way on the basis of their
physical values.
3. Using the meter
Before you begin with the
calibration, look for a reference
point within your loop (usually in
the middle of the installed loop).
Hold the PROLOOP FSMplus
perfectly perpendicular to the
oor. Be sure to also make a note
of the height at which you hold
the device. This depends on the
application.
Typical values are e.g. 1.20 m
(sitting) or 1.70 m (standing).
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PLM FSMP Field Strength Meter Plus
4. Step-by-step instructions
Use the CD with the reference signal that is enclosed with the device
and perform the following steps to perfectly adjust the loop to your
needs.
To ensure exact measurements, always hold the PROLOOP FSMplus
perpendicular to the oor.
-3 to +3 dB
Reference
measurements
turned as far
to the left as
possible
Maximum <
-30 dB
Ideal < -43 dB
+-3 dB at
1000 Hz
0 dB
-3 to +3 dB
+-3 dB at
1000 Hz
in the peaks
Comparison
point
Measurement
range and lter
selection switch
Required
Masurement Signal
None All controls
FSMplus
o
o
Basic seting Amplier o FSMplus
Step 1
points inside
the loop
Amplier o -20 dB A Several
Background
noise
Step 2
CD track 3 0 dB Norm Loop power 0 dB
Magnetic
Field
Strength
Step 3
CD track 3 0 dB Norm Adjust loop
CD track 3 0 dB Norm Treble Max deviation
Magnetic
Frequency
response
Step 5
Step 4
power
eld
strength
again
control
0 dB Norm Line IN
Current
signal e.g.
Step 6
microphone
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PLM FSMP Field Strength Meter Plus
5. Maintenance and care
The PROLOOP FSMplus does not require any maintenance. If the
unit does become dirty, simply wipe it clean with a soft, damp cloth.
Never use spirits, thinners or other organic solvents. Do not set up
the PROLOOP FSMplus where it will be exposed to full sunlight for
long periods. In addition, it must be protected against excessive heat,
moisture and severe mechanical shocks.
Note: This product is not protected against splash water. Do not place
any containers lled with water, such as ower vases, or anything with
an open ame, such as a lit candle, on or near the product.
6. Warranty
The PROLOOP FSMplus is a very reliable product. Should a malfunction
occur despite the unit having been set up and operated correctly, please
contact your dealer or the manufacturer directly.
This warranty covers the repair of the product and returning it to you
free of charge. It is essential that you send in the product in its original
packaging, so do not throw the packaging away. The warranty does not
apply to damage caused by incorrect handling or attempts to repair the
unit by people not authorised to do so (destruction of the seal on the
unit). Repairs will only be carried out under warranty if the completed
warranty card is returned accompanied by a copy of the dealer‘s
invoice/till receipt. Always specify the product number in any event.
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PLM FSMP Field Strength Meter Plus
7. Disposal
Disposal o used electric and electronic units
(applicable in the countries of the European Union and other European
countries with a separate collection system). The symbol on the product
or the packaging indicates that this product is not to be handled as
ordinary household waste but has to be returned to a collecting point for
the recycling of electric and electronic units. You protect the environment
and health of your fellow men by the correct disposal of this products.
Environment and health are endangered by a faulty disposal. Material
recycling helps to reduce the consumption of raw material. You will
receive further information on the recycling of this product from your
local community, your communal disposal company or your local dealer.
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PLM FSMP Field Strength Meter Plus
8. Specications
Scale calibration:
Operating mode -20 dB -20 dB = 0.043 A/m
Operating mode 0 dB 0 dB = 0.4 A/m
Type of measurement True RMS 125 ms
Frequency response:
Filter A / Flat
30 Hz...500 Hz -3 dB...-4 dB
500 Hz...2500 Hz +/-0.25 dB
2500 Hz…10kHz +/-3 dB
Outputs:
Display Color-coded LED dot display
Headphones 3.5 mm cinch
Power supply: Batteries 2x AA
Indicator lights LED
Service life 100 h
Dimensions (WxHxD) 83 x 126 x 35 mm
Weight approx. 300 g
This device satises the following EU directives:
- 2002/95/EG RoHS directive - 2004/108/EG EMC directive
- 2002/96/EG WEEE directive - 2006/95/EG Low voltage directive
Compliance with the directives listed above is conrmed by the CE seal on the device. CE
compliance declarations are available on the Internet at www.humantechnik.com.
Technical specications subject to change without notice.
10300 Valley View Rd · Eden Prairie, MN 55344
800-328-6190 / 952-943-2252 · FAX: 952-943-2174
www.williamssound.com
MAN 204A
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