RKI Instruments Eclipse - Manual (Page 5)

Eclipse Detector Head Operator’s Manual 5
detector terminal strip and power/signal terminal strip. A ribbon cable with a connector
on each end connects the two PCB’s.
Interconnect PCB
The interconnect PCB is mounted into the rear of the junction box with two standoffs. A
banana jack is screwed into each of the standoffs and used for mounting the control PCB.
On the right side of the interconnect PCB is the detector terminal strip, a six position
terminal strip. It is used to connect the detector to the Eclipse. At the bottom of the
interconnect PCB is the power/signal terminal strip, a three position terminal strip. It is
used to connect the Eclipse to incoming power and an external device.
NOTE: The detector is factory-wired to the Eclipse. See the Installation section of this
manual for all wiring procedures related to the Eclipse.
Control PCB
The control PCB is installed on top of the interconnect PCB by lining up its two mounting
holes with the banana jacks which are installed in the interconnect PCB mounting
standoffs and pushing it onto the banana jacks. The jacks retain the control PCB.
• LCD Display
The LCD display is mounted on the control PCB. It indicates the current gas reading.
• Optical Switch
The optical switch is also installed on the control PCB. This switch is below the
display and is visible through the window in the junction box cover. It is used to enter
the calibration program and adjust calibration settings by covering it and uncovering
it with a finger in certain patterns. The switch senses the change in light intensity
which occurs when it is covered and uncovered and interprets this as a press and
release.
IT IS NOT NECESSARY TO REMOVE THE JUNCTION BOX COVER TO
USE THIS SWITCH .
Hereafter in this manual the action of covering and uncovering the optical switch will
be referred to as a press and release. A press and release is indicated in the upper right
corner of the display by a number which increments up by 1 with each press and
release up to 3. The next press and release will clear this number and then the next
press and release will display 1 again. The action of covering the optical switch and
keeping a finger over the switch will be referred to as a press and hold. This is
indicated in the upper right corner of the display by an “H”.
NOTE: When pressing, the finger should touch the glass cover directly over the switch to
insure that the switch will sense the change in light intensity.
Since the optical switch works by sensing changes in light intensity, the Eclipse
requires a steady background light level when the switch is being used. If the
background light level changes significantly, the Eclipse requires approximately one
minute to adjust to this change before the switch can be used. For example, if the
Eclipse is in a room with the lights on and the lights are turned off (likewise if they are
off and then turned on), allow one minute for it to adjust to the change in background
light before attempting to use the optical switch. The same may be true if it is installed
in an area with bright sunlight and you step in front of it so that your shadow is cast
on the optical sensor. If the Eclipse has adjusted to the new background light level, it
will indicate each press and release of the optical switch by incrementing the number