"
The PEKA light engine should be operated in an open area
where airflow facilitates proper cooling. Restricting the airflow
will cause the unit to operate at elevated temperatures and could
result in decreased service life and/or premature failure.
With the power control knob (Figure 2) in the OFF position, plug
the DC power supply into the power connector at the back of
the light engine. A green indicator light on the rear panel above
the DC power input connector indicates that electrical power is
being supplied to the light engine. On the Nikon Hub model,
connect the port labeled “LAMP CTRL” on the rear of the
microscope stand to the lamp control port on the rear panel of
the PEKA using a Nikon DIA LAMP control cable, available for
purchase from Nikon:
• Nikon Ti Hub cable part number MEF51001
• Nikon Ti2 cable part number MXA22163
3.3 Operation: Onboard Control
Take necessary precautions to protect yourself and others from
the high intensity light when turning on the unit. The PEKA light
engine should be coupled to a microscope before it is turned on.
Two control knobs are located on the side panel. The POWER knob
turns the light output on or off. The yellow “light” indicator on the side panel alerts the user when the light output is
on. The INTENSITY control knob has four positions that set the light engine to deliver approximately
10%, 25%, 50% and 100% of maximum output.
There is no warm-up time; the light engine output
stabilizes less than 1 second after the POWER knob
is turned to the “on” position. Light output can be
switched off during intervals when it is not required
for active viewing or data collection.
3.4 Operation: Electronic Shutter
The PEKA light engine incorporates an electronic
shutter function controlled via the BNC “gate”
connector located on the rear panel. >+3.3 V
“high” DC levels applied to the gate BNC initiate
light output (shutter = off) but do not activate the
light sources. Light sources must first be activated
using the manual POWER control knob. <+1.5 V
“low” DC levels applied to the gate BNC terminate
light output (shutter = on). The PEKA light engine can
accommodate an on/off switching rate up to approximately 1 kHz. When no input is applied to the BNC, the gate
DC level is pulled high internally (shutter = off).
PEKA Light Engine Instruction Manual
7
Set screw
fastener
Figure 1.
PEKA light engine with output
adapter for coupling to Nikon Ti/Ni/Ci micro-
scope transmitted light port.
Locating pin
Figure 2.
Control knobs located on the side panel
BNC input connector
for electronic gating
