2
CONTENTS
Meter Design goals
2
Meter Operation Basics
3
Background Noise Tests
4
Program RMS/Peak Levels
5
Evaluating Frequency Response
6
Headphone/Flat spectrum output
7
Line In Flat Response
8
Meter Specifications / Calibration
9
Thank you for choosing our Field Strength Meter. It has been designed
to ensure that Hearing Loop (Induction Loop) Systems be installed and certified
to the new IEC 60118-4 standard. When these standards are met the user expe-
rience will be of equal quality wherever they have the opportunity to use their T-
coils. Our design team interviewed many installers throughout the industry which
resulted in the following design goals:
1. Very accurate and easy to read
2. Simple/straightforward operation
3. Based on the IEC 60118-4 specification
4. Headphone output
5. Flat spectrum output
6. Built to last and be reliable
As you follow through this manual, we will review how the meter should be used
to certify that the requirements of the IEC specification have been met.
Again, Thank you
Contacta Design and Engineering Team
Meter Design Goals
9
Meter Specifications:
Measurement Range:
-62dB to +9dB (0dB = 400mA/m)
True-RMS Crest Factor:
<3
Resolution:
<0.1dB resolution for levels
over –32dB
Displayed resolution:
0.1 dB
Detection Type:
True RMS on all features
Sensor:
Pickup Coil
Direction of Sensitivity:
Length-wise of meter’s longer dimension
and Parallel to meter face (Position noted
on Product)
Calibration:
Calibrated at 1,000 Hz (sine) to read 0
dB at 5.03 mG
Frequency Response:
Flat ±1dB from 50 Hz to 10,000 Hz
A-Weighted:
Class 2 meter specified in IEC 61672-1
Power Source:
Single 9v Battery & External Power
Jack
Headphone Jack:
Output A-Weighted or Flat selectable
Display:
16x2 LCD Character Display
Backlight:
Variable brightness blue LED
Calibration and Warranty:
This meter has been calibrated with equipment that is traceable back to the National Bureau
of Standards. Under general use this meter should not require regular calibration, however if
you return the unit to Contacta, the calibration can be checked and supplied with a calibration
curve. Please call to get a service number and check the costs involved.
Contacta, Inc. 332 E. Lakewood Blvd #400, Holland, MI 49424 Phone: (616) 392-3400
Email: [email protected].
This meter is warranted to be free of component, design and manufacturing defects for a
period of one year. Contacta accepts no responsibility for system designs or installations
where this meter was used for test and calibration purposes. Please contact us if you have
any questions. Thank you.
