HT instruments HT9 - Manual (Page 12)

HT6-HT8-HT9
EN - 11
5.5. LAMP TEST
WARNING
 During the test, do not touch the socket of the lamp, as you may obtain
unreliable results.
 During the test, do not touch the test lead, as a high test voltage is
present.
 During the test with the test lead, do not touch any other object than the
lamp being tested.
 After a lamp test it is necessary to wait 5 seconds before being able to
perform a voltage measurement
The instrument allows quickly detecting the presence of faults on discharge lamps filled
with low or high-pressure gas.
Measuring procedure:
 Use the L2 lead (see Fig. : 1 – no. 2) to touch the glass or the supply socket of the
lamp.
 Press and hold the “Test” button (see Fig. : 1 – no. 8) for the whole duration of the test.
 After approx. 0.5 seconds, if the gas inside the lamp is efficient, the lamp starts
flashing.
Fluorescent tube test
If, during the test, fluorescent tubes light up but they do not work once installed, the coiled
filament or the supply may be defective.
The filaments and the supplies may be tested using the instrument's Continuity test
function (see § 5.4).
WARNING
Check the supplies and the capacitors only when they have been disconnected
from live circuits and when the capacitors are flat. These conditions must be
verified through voltage measurements.
Low-pressure sodium lamp test
Touch the glass or a supply pole of the tube with the lead and press the “Test” button. If
the tube lights up it means that the tube is intact. In some cases, only a part of the tube
lights up; to check the other part, repeat the test procedure touching the other supply pole.
High-pressure sodium lamp test
Touch the glass or a supply pole of the tube with the lead and press the “Test” button. If a
light blue line appears inside the tube, it means that the tube is intact.
Possible other results indicate a defective tube.
Neon tube test
Touch the glass or a supply pole of the tube with the lead and press the “Test” button. If
lighting is not visible, the tube must be replaced.