HILT 9000 - Inductive Loop Tester | 3 |
General Description
The HILT-9000 is designed to measure characteristics of an inductive loop at different frequencies; measure working parameters of the loop system; as well as simulate the detector by measuring the change of inductance. The measurement modes can be easily switched by pressing corresponding buttons on the keypad.
The following tests can be run to verify the condition of the loop:
•R, L, and Q of the loop
•Operating parameters of the loop system: operating mode, frequency (fOP), and peak-to-peak voltage (VPP)
•Change of inductance of the loop (∆ L/L)
Where,
Q = quality factor (dimensionless) L = inductance (∝H)
RDC = DC resistance (Ω )
fOP = operating frequency (KHz) VPP = peak-to-peak voltage (V)
The tester offers a user-selectable frequency at which Q and L are measured. At power-up, the frequency is pre-set to 50KHz and can be easily changed from 20KHz to 80KHz range using the keypad.
An inductance change (∆ L/L) can be measured to assess the real life behavior of the loop. In this mode the tester displays the current value of the inductance change and the maximum observed change which can be reset by pressing a button on the keypad.
When the loop is connected to a detector, the tester can measure the oscillating frequency and peak-to-peak voltage of the signal. In addition, the tester detects the operating mode and indicates if it is a continuous (single channel) or scanning (for most multi- channel detectors).
The tester has a 16 by 2-character LCD for presenting the measured values to the user. The control keypad has 7 command buttons and one Power On/Off button. The tester requires two standard 9V alkaline batteries. To extend the life of the batteries, the tester shuts off automatically after 30 seconds of non-use.
