A series of measurement tools for Ampetronic induction loop systems. These devices have been designed to aid the installation process by giving accurate response of loop output across areas of a room.
FSM - IEC 60118-4
A compact, ergonomically designed, hand-held instrument for measuring the performance of virtually any induction loop system, for use in regular monitoring or for initial set-up. The meter has a headphone output and measures background noise, field strength and frequency response, providing a simple means of checking adherence to the IEC60118-4:2006 standard.
The first mode of operation determines the level of background magnetic flux present in the loop system location, with a weighted filter, on a scale between -12dB and -42dB; this mode can also be used to assess overspill outside the system. The second mode uses a broad-band measurement of 50Hz to 8kHz to assess system field strength on a scale from -22 to +8dB and is suitable for use with a system input from a test signal CD, or with any other real signals. Finally, the third mode of operation employs third octave filters at 100Hz, 1kHz and 5kHz for measuring frequency response in the range stipulated by IEC60118-4 and can be used to confirm the adequacy of power at high frequencies and to assess frequency-dependent loss due to metal structures; for use with pink noise signal only.
The meter has an LED display with a wide viewing angle as well as colour-coded LEDs for efficient operation in a multitude of environments. Measurement is RMS and referenced to 400mA/m with resolution to 1dB. The headphone outlet is a 3.5mm jack socket with a minimum headphone impedance of 32ohms per channel. Power source: two AA alkaline batteries. Dimensions (HxWxD): 84 x 140 x 27mm. Weight: 150g, excluding batteries.
Included accessories: case, manual, template for commissioning certificate, 'Designing Induction Loops' handbook, two AA alkaline batteries.
LOOPWORKS MEASURE R2
Loopworks Measure R2 receiver is an audio induction loop receiver that has a vertically mounted pick up coil. The device has been designed to be used in conjunction with Ampetronic's Loopworks Measure App - the latter can be downloaded from the Apple app store. The app supports use of the R2 with official Apple lightning to 3.5mm and USB-C to 3.5mm adapters.
Applications include field strength, frequency response and background noise measurement without sign-in; and Commissioning (IEC 60118-4 certification) when signed in with Loopworks. The integrated calibration routine ensures accurate field strength and frequency response, whilst a frequency response if 50Hz to 8kHz (+/- 0.25dB) can be subjected to a brick wall filter beyond 10kHz - via the app. Audio inputs include a 3.5mm, 4-pole jack plug for connection to Apple device, and 3.5mm 3-pole jack socket for monitoring with stereo headphones.
Please note that the Loopworks Measure App is currently only available through Apple app store and will only run on an iOS device; that is an iPhone, iPod Touch or an iPad device running iOS 15 or higher.
Coil orientation: Vertical when held upright. Reference level: 400mA/m, field strength mode. Frequency response: 50Hz - 8kHz, +/-0.25dB; 40Hz to 10kHz +/-0.5dB, 30Hz to 15kHz +/-3dB. Calibration power: Less than 100mW. Measurement power: Less than 1mW. Dimensions (HxWxD): 52 x 27.5 x 9.5mm. Weight: 10g
Included accessories: Soft carry pouch, user guide, USB-C to 3.5mm adapter