Sciencetech 75W Mercury Light Source Manual
Page 8 of 13
5.
Operating Instructions
Before operating the lamp the user has to make all cable connections (refer to figures below).
Figure 1
Figure 2
Figure 3
1)
Connect the yellow power cable (Figure 1) to the igniter (Figure 3).
2)
Connect the lamp housing leads into the igniter (Figure 2). Red to red and black to black.
3)
Plug the power supply into your mains power line using the proper cable type (Figure 1).
4)
Warning please verify that the Schurter module on the back of the power supply is set to
the AC voltage you are using (120VAC or 220VAC)
To ignite the lamp, set the current dial to about 50% its base value and, ensuring all the
connections are made properly, turn the power switch (Figure 1) to the ON position (-). When
powering off the lamp, turn the current dial down to zero.
The igniter will generate 1 KHz HV pulses to ignite the lamp. Normally, the ST75 arc lamp
ignites within 3-5 seconds. During the ignition process the display will show 110-130V. As soon
as the lamp ignites the display will show 18-22 V. Then the voltage will gradually grow to its
working value of 77-95 V (this takes typically 25-35minutes). Once the lamp has stabilized, the
