ATS Handheld Inductive Loop Tester HILT 9000 - Manual (Page 7)

6
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The LOOP test can measure a maxi-
mum
Q of 15. If Q is greater than 15
the tester displays
Q>15. To measure
the actual value, press the
Q button on
the keypad to run a separate
Q test.
The default frequency at which the
LOOP and
Q tests 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
Q at
some arbitrary frequency and calculate
Q for 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
Q results 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=12.3
Ω
Q=12.1
L=89.2µH 50KHz
Figure 3
Q=12.1 @40.5KHz
* Q=14.9 @50.0KHz
Figure 4