ATSI Handheld Inductive Loop Tester HILT 9000 Manuale utente
HILT 9000
Handheld Inductive
Loop Tester
User Manual
July 2003
R=12.3ΩQ=12.1
L=89.2µH 50KHz
ATSI
8157 US Route 50 • Athens, OH 45701
(740) 592-2874 • Fax (740) 594-2875
sales@atsi-tester.com
www.atsi-tester.com
1
HILT 9000 - Inductive Loop Tester
Table of Contents
Receiving Your Shipment......................................................... 2
Packaging................................................................................ 2
Description ............................................................................. 3
Overview of HILT 9000 Controls .............................................. 5
Function Controls ................................................................... 5
Power ................................................................................ 5
Loop .................................................................................. 5
Q................................................................................................................ 6
Set Frequency, Arrows ....................................................... 7
∆L ...................................................................................... 7
Detector............................................................................. 8
Function Controls Summary ................................................... 9
Overview of Traffic Loop Detection Systems ............................ 9
Battery Replacement ............................................................. 11
Commonly Asked Questions.................................................. 12
Repair and Calibration .......................................................... 13
Technical and Sales Assistance ............................................. 14
Limited Warranty .................................................................. 16
Warranty Repair .................................................................... 16
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Warnings
These safety warning are provided to ensure the safety of
personnel and proper operation of the tester.
• The tester must not be operated beyond its specified
operating range.
• Safety is the responsibility of the operator.
Receiving your Shipment
Upon receiving your shipment, be sure that the contents are
consistent with the packing list. Notify your distributor or factory
of any missing items. If the equipment appears to be damaged,
file a claim immediately with the carrier and notify your the
factory at once, giving a detailed description of any damage.
Save the damaged packing container to substantiate your claim.
Packaging
The HILT 9000 Inductive Loop Tester is shipped with a hard
carrying case, one set of test leads with clips, two 9V batteries
(installed), and a user manual. Depending on whether you
purchased the HILT 9000 only or the complete Loop Test Kit, you
may have additional items included.
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HILT 9000 - Inductive Loop Tester
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 Qof 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 (µH)
RDC = DC resistance (Ω)
fOP = operating frequency (KHz)
VPP = peak-to-peak voltage (V)
The tester offers a user-selectable frequency at which Qand 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.
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Overview of HILT 9000 Controls
1. LOOP: Measures RDC, L, and
Q. If Q>15, use Qpush-
button to obtain actual value.
2. Q:Measures high Qvalues
(when Qis >15).
3. Used in SET FREQ mode to
increase frequency by 1KHz.
4. Used in SET FREQ mode to
decrease frequency by 1KHz.
5. POWER: Turns unit On/Off.
6. SET FREQ: Selects operating
frequency to measure L & Q.
7. ∆∆
∆∆
∆L: Measures change of
inductance.
8. DETECTOR: Measures
operating parameters of the
loop system: VP-P, Oscillating
frequency, and mode.
9. Input: Color coded input
connectors.
Ready: 100%
Select Function
Figure 1
5
HILT 9000 - Inductive Loop Tester
Function Controls
Power
Press the POWER push-button to turn the tester on and off. The
tester performs an initial self-test to verify that the internal
circuit is working. After the self-test is complete, the tester shows
the current battery level and the message: Ready: Select
Function. If the battery is low, a message Replace Battery will
be displayed.
Press and hold the POWER push-button during power-up to
display the serial number of the unit and the version of the
firmware as show in Figure 2. Release
the push-button to return to normal
operation.
The unit can be turned off at any time
by pressing the POWER button. The
tester shuts off automatically after 30
seconds of non-use.
Loop
ATTENTION
• Disconnect the detector from the loop before running
this test.
• DO NOT switch to a different test while the measure-
ments are being generated for the current test. Only
after the results of the current test are displayed can
a different test be performed.
Connect the test leads to the loop. Press the LOOP push-button
to begin the test. After the measurement is complete, the tester
displays the results as shown in Figure 3 on the next page. Note
that the frequency at which L and Qwere measured is also
displayed.
HILT-9000 #1234
Self-test v.1.0
Figure 2
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The LOOP test can measure a maxi-
mum Qof 15. If Qis greater than 15
the tester displays Q>15. To measure
the actual value, press the Qbutton on
the keypad to run a separate Qtest.
The default frequency at which the
LOOP and Qtests run is 50 KHz. It can
be changed to any value within the
range from 20 KHz to 80 KHz with 1
KHz increment.
Quality (Q)
ATTENTION
• Disconnect the detector from the loop before running
this test.
• DO NOT switch to a different test while the measure-
ments are being generated for the current test. Only
after the results of the current test are displayed can
a different test be performed.
Connect the test leads to the loop. This test requires several
seconds to run during which the tester will measure Qat
some arbitrary frequency and calculate Qfor a user-selected
frequency. If a user-selected frequency is not entered prior to
pressing Q, the default 50KHz setting
will be used. Refer to the Set
Frequency section on page 7 for
full instructions to enter a different
frequency.
Both Qresults will be presented on the
display as shown in Figure 4. The
calculated value is shown on the
second line and indicated with an *.
R=12.3ΩQ=12.1
L=89.2µH 50KHz
Figure 3
Q=12.1 @40.5KHz
*Q=14.9 @50.0KHz
Figure 4
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HILT 9000 - Inductive Loop Tester
, , Set Frequency
When the tester is powered, the test frequency is automatically
set to 50 KHz. The frequency can be changed to any value
between 20 KHz and 80 KHz with 1 KHz resolution. To set a
different frequency press the SET
FREQ push-button to view the fre-
quency adjustment display as show in
Figure 5. Use the !or "push-button to
increase or decrease the frequency by
1KHz. Pressing and holding !or "
button will automatically increase/
decrease the value.
Change of Inductance
ATTENTION
• Disconnect the detector from the loop before running
this test.
• Prior to measuring the operating parameters of the loop
system, press the DETECTOR push-button and verify
the tester displays the “No Signal” message. Once this
message is received the detector can be reconnected to
the loop.
In this mode, the tester simulates a detector by measuring a
relative change of the inductance and displaying the results.
Connect the test leads to the loop and
press ∆∆
∆∆
∆Lbutton on the keypad. The
display will appear as shown in Figure
6. The top line indicates the current
change of the inductance and the
bottom line indicates the maximum
recorded change of inductance. To
reset the maximum value press the ∆∆
∆∆
∆L
button.
Test @ frequency
F=50 KHz
Figure 5
dL/L= 0.127%
max= 3.378%
Figure 6
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If there is bad connection, the tester
displays a message as shown in Figure
7. Make sure that the test leads are
properly connected. If the leads are
connected to the loop and the message
is still present, it means that Qof the
loop is too low to generate the oscilla-
tion or the inductance is out of range.
This can be verified by performing the
LOOP test.
In this mode, the the tester will shut off automatically after 45
seconds if no buttons are pressed.
Detector
ATTENTION
• Verify the Loop is connected to detection system before
running this test.
• Disconnect the detector from the loop before running a
LOOP, Q, or ∆∆
∆∆
∆Ltest.
The purpose of this test is to measure
the operating parameters of the
working loop while it is connected to
the detector.
Connect the test leads to the loop and
press the DETECTOR push-button.
During this test the measurements are
constantly updated displaying the type
of the operating mode, peak-to-peak
voltage, and the operating frequency as
show in Figure 8. If the signal is not
present or signal is weak, the tester
displays “No Signal” message as show
in Figure 9.
In this mode, the the tester will shut
off automatically after 45 seconds if no
buttons are pressed.
dL/L:
No loop found
Figure 7
Scan. mode:
7.4V @F=34.1KHz
Figure 8
No signal
-.-V @F=--.-KHz
Figure 9
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HILT 9000 - Inductive Loop Tester
Function Controls Summary
BUTTON DESCRIPTION COMMENTS
LOOP Used to measure L, Q, and R
DC
of the loop. Q is measured up
to 15. If Q>15, use Qbutton to
obtain the actual value of Q
The loop must be
disconnected from the
system to run this test
Q Used to measure high Q
values (when Q is >15)
The loop must be
disconnected from the
system to run this test
∆LUsed to measure change of
inductance
The loop must be
disconnected from the
system to run this test
DETECTOR Used to measure operating
parameters of the loop
system: V
P-P
, Oscillating
Frequency, and Mode
The loop must be
connected from the
system to run this test
SET FREQ. Used to select operating
frequency to measure L and Q
!and "Used in SET FREQ mode to
increase and decrease
frequency in 1KHz steps.
POWER Used to turn the unit on and
off.
The tester can be
turned off at any time
during or after a test
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