ATS Handheld Inductive Loop Tester HILT 9000 - Manual (Page 12)

11
HILT 9000 - Inductive Loop Tester
To guarantee a reliable oscillation in the loop system the quality
factor (
Q) of the loop with the lead-in wires should be above some
value, determined by the amplifiers inside the detector. Deterio-
ration of the loop and lead-in wires reduces
Q and eventually
prevents the system from oscillating even with a known good
detector.
Battery replacement
NEVER OPEN THE BATTERY COMPARTMENT
WHILE THE HILT -9000 POWER IS ON.
The battery indicator (in percentage format) on the LCD indicates
when the batteries in the HILT-9000 require replacement. There
are two 9V alkaline batteries in the HILT. Recommended replace-
ment type is Alkaline (IEC 6LF22, 6LR61 or NEDA 1604A).
To replace the batteries, you will need to open the battery cover
on the backside of the tester. Lay the tester face-down on a flat
table, making sure that there is nothing underneath the tester
that can accidentally turn the tester on. Remove the two Phillips
head screws that secure the battery cover. The battery cover can
then be removed and access to the batteries obtained. Installa-
tion is the reverse of this procedure.
All other types of services needed for the HILT -9000 should only
be performed by an ATSI factory technician. Any attempt at
servicing the tester yourself or by someone other than a ATSI
technician will void the factory warranty. See the Warranty
statement at the end of this manual for full details.