HT Instruments HT6 Bedienungsanleitung Seite 30

5.5. LAMP TEST
• 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
5.5.1. Test on discharge low/high pressure gas lamps
1. Use the L2 lead (see Fig. : 1 – Part 2) to touch the glass or the supply socket of the
lamp
2. Press and hold the "Test" button (see Fig. : 1 – Part 8) for the whole duration of the test
3. After approx. 0.5s, if the gas inside the lamp is efficient, the lamp starts flashing.
5.5.2. 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).
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.
5.5.3. Low-pressure sodium-vapor 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
5.5.4. High-pressure sodium-vapor 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.
5.5.5. 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
5.5.6. Mercury-vapor lamp and halogen lamp test
➢ Touch the glass of the tube or a supply pole with the lead and press the "Test" button
➢ If lighting is not steady, the tube is defective. If the tube only operates when it is not
installed and turns off and on or seems unsteady when it is installed, check that the
tube is not unusually overheated, as this may cause a repeated opening and closing of
the tube switch.
CAUTION
CAUTION
EN - 11
HT6 - HT8 - HT9