Eclipse Detector Head
Operator’s Manual
Part Number: 71-0036RK
Revision; 0
Released: 3/12/03
Eclipse Detector Head Operator’s Manual
.
Warranty
RKI Instruments, Inc., warranties gas alarm equipment manufactured by RKI and sold by
RKI to be free from defects in materials and workmanship for a period of one year from
date of shipment from RKI Instruments, Inc. Any parts found defective within that period
will be repaired or replaced, at our option, fr ee of char ge. This warranty does not apply to
items that are subject to deterioration or consumption in normal service, and which must
be cleaned, repaired, or replaced routinely. Those items include, but are not limited to:
absorbent cartridges sensors
pump diaphragms and valves filter elements
lamp bulbs and fuses batteries
This warranty is voided by mechanical damage, misuse, alteration, rough handling, or
repairs not in accordance with the operator’s manual. This warranty indicates the full
extent of our liability. We ar e not responsible for r emoval or r eplacement costs, local repair
costs, transportation costs, or contingent expenses incurred without our prior approval.
T
HIS
WARRANTY
EXPRESSED
I
NSTRUMENTS
MERCHANTABILITY
I
NSTRUMENTS
DAMAGE
PRODUCTS
OF
OR
IMPLIED
, I
, I
ANY
TO
FUNCTION
IS
IN
NC
.,
INCLUDING
OR
NC
.,
BE
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OF
ANY
,
AND
ALL
FITNESS
CONNECTED
LIABLE
OR
OPERATE
FOR
FOR
OTHER
OTHER
BUT
A
INDIRECT
WITH
NOT
WARRANTIES
OBLIGATIONS
LIMITED
PARTICULAR
,
INCIDENTAL
THE
USE
PROPERLY
OR
TO
THE
PURPOSE
OF
ITS
AND
REPRESENTATIONS
LIABILITIES
WARRANTY
. I
N
NO
EVENT
,
OR
CONSEQUENTIAL
PRODUCTS
OR
ON
OF
THE
PART
SHALL
FAILURE
,
RKI
LOSS
OF
OF
ITS
RKI
OR
This warranty covers instruments and parts sold to end users by authorized distributors,
dealers, and representatives of RKI Instruments, Inc.
We do not assume indemnification for any accident or damage caused by the operation of
this gas monitor. Our warranty is limited to replacement of parts or our complete goods.
2 Eclipse Detector Head Operator’s Manual
About the Eclipse Detector Head
The Eclipse Detector Head is a fixed mounted, continuous-monitoring detector head. All
user adjustable parameters may be adjusted non-intrusively by use of an optical switch
which is accessible through a window at the front face of the detector head.
The Eclipse displays the current gas reading on an LCD display which is visible through
the window in the cover (front face). It also provides a 4 - 20 mA signal which indicates
the target gas reading for use by a recording device, gas monitor controller, or
programmable controller.
Specifications
Table 1 lists specifications for the Eclipse.
Table 1: Specifications
Target Gas/Detection Range Combustible Gas: 0 - 100% LEL, 1% LEL increments
Oxygen: 0 - 25% volume, 0.1% increments
Carbon Monoxide: 0 - 300 ppm, 1 ppm increments
Hydrogen Sulfide: 0 - 100 ppm, 0.5 ppm increments
Construction (housing) Explosion-proof Junction Box
Area Classification Explosion-proof for Class I, Groups B, C, and D
Sampling Method Diffusion
Input Power 24 VDC
Controls Optical Switch (operated at front face)
Weight 4.5 lbs.
Signal Output 4 to 20 mA
Eclipse Detector Head Operator’s Manual 3
Description
Ribbon Cable Connector (behind nameplate, cable not shown)
3/4" Conduit Hub
LCD Display
Nameplate
™
ECLIPSE ™ GAS MONITOR
PATENT
PENDING
Control PCB
Optical Switch
Junction Box
Detector (Co m bustible s hown for ref))
View With Cover Removed
Ribbon Cable Connector
XXX
Cl2: Yellow
SO 2: Oran ge
CO: Red
H2S: Red
ECLIPSE
24 VDC
IN
-+
FB
View With Coverand
Control PCB Removed
Interconnect PCB
Sensor Terminal Strip
GRN
WHT
BLKBLK
GRN
WHT
RED XXX
Power/Signal T erminal Strip
Figure 1: Eclipse Component Location
The Eclipse consists of the gas detector, amplifier set, and junction box.
Gas Detector
The gas detector senses the target gas and is mounted in a 3/4” conduit hub on the left
bottom side of the Eclipse. The detector type will depend on the target gas and may be one
of the following: combustible gas, oxygen, carbon monoxide (CO), or hydrogen sulfide
(H2S).
The CO and H2S detectors have replaceable sensors. The CO detector includes a charcoal
filter disk which is held onto the sensor with a rubber retaining boot. The charcoal filter
disk scrubs out interfering gases to which the CO sensor responds such as H2S and certain
hydrocarbons.
NOTE: The combustible gas detector has a 1/2” NPT thread and requires a 3/4” x 1/2”
conduit reducer to mount in the detector hub.
Amplifier Set
The amplifier set converts the electrical output from the detector to a signal which can be
displayed by the LCD display and also to a 4 - 20 mA signal (that is proportional to the
detection range). The 4 - 20 mA signal may be used by a recording device, gas monitor
controller, or programmable controller. The amplifier set consists of two potted printed
circuit board (PCB) assemblies: the interconnect and control PCB’s. The control PCB
includes the LCD display and optical control switch. The interconnect PCB includes the
4 Eclipse Detector Head Operator’s Manual
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 r elease. 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 ar e
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
Eclipse Detector Head Operator’s Manual 5
in the upper right of the display.
If the Eclipse is installed in an area with no significant background light, use a
portable lantern or flashlight to provide a steady background light level.
Junction Box
Use the junction box to install the Eclipse detector head at a mounting site. The junction
box also protects the Eclipse and all connections made to it. Use the two 3/4 in. conduit
hubs to mount the detector to the junction box (bottom hub) and connect wiring from an
external device.
NOTE: The gas detector and amplifier set are factory-mounted in the junction box.
Use the junction box’s two mounting holes to mount the Eclipse to a vertical surface at the
monitoring site. The window in the cover on the front of the junction box allows you to
cover the optical switch in patterns to perform calibration. Removing the cover allows you
to access the interior of the junction box.
Installation
This section describes procedures to mount the Eclipse Detector Head in the monitoring
environment and wire it to input power and devices.
Mounting the Eclipse Detector Head
1. Select a mounting site that is representative of the monitoring environment. Consider
the following when you select the mounting site.
• Select a site where the Eclipse is not likely to be bumped or disturbed. Make sure
there is sufficient room to perform start-up, maintenance, and calibration
procedures.
• Select a site where the target gas is likely to be found first. For lighter gases,
mount the detector near the ceiling; for heavier gases, mount the detector near the
floor.
2. At the monitoring site, use #10 screws through the junction box’s two mounting holes
to secure the junction box to a vertical surface. Figures 2-5 show the outline and
mounting dimensions for each of the Eclipse detector heads.
CAUTION: Mount the Eclipse with the detector facing down.
6 Eclipse Detector Head Operator’s Manual
4.60
.25 Mounting Holes (2X)
3/4 Conduit Hub
5.2
2.75
6.1
1.1
7.7 max
2.3 max
Figure 2: Outline & Mounting Dimensions, LEL
Ø.25 Mounting Hole (2X)
3/4 Conduit Hub
4.60
5.2
5.46
2.75
6.1
8.3 max
2.85 max
1.1
5.46
Figure 3: Outline & Mounting Dimensions, HS/CO
Eclipse Detector Head Operator’s Manual 7
Ø .25 MOUNTING HOLES (2X)
3/4 CONDUIT ENTRY
4.60
5.2
2.75
6.1
8.0 max
2.6 max
1.1
Figure 4: Outline & Mounting Dimensions, Oxygen
Wiring the Eclipse
WARNING: Always verify that the power source is off or disconnected before
performing any wiring.
1. Remove the junction box cover.
5.46
2. Grasp the round Eclipse nameplate though which the LCD display is visible.
3. Gently pull until the control PCB is pulled away from the junction box. The detector
and power/signal terminal strips are now visible on the interconnect PCB. Take care
not to pull too hard and damage the cable which connects the top and bottom PCB’s.
4. If necessary, disconnect the cable from the interconnect PCB and lay it aside with the
control PCB.
5. Verify that the detector leads are wired to the detector terminal strip as shown on the
wiring label which is on the bottom PCB:
• Combustible gas detector.
Red wire to terminal labelled LEL RED, white wir e to terminal labelled LEL WHT,
green wire to terminal labelled LEL GRN, black wire to terminal labelled LEL
BLK.
8 Eclipse Detector Head Operator’s Manual
ECLIPSE
24 VDC
+FB
IN
-
XXX
Cl2: Yellow
SO2: Orange
CO: Red
H2S: Red
GRN
WHT
BLK
GRN
WHT
BLK
RED
XXX
Figure 6: LEL Detector Wiring
Black
Green
White
Red
• CO or H
S gas detector.
2
Red wire to terminal labeled TOXIC RED, black wire to terminal labelled TOXIC
BLK.
Black
Red
GRN
WHT
BLK
GRN
WHT
BLK
RED
XXX
ECLIPSE
24VDC
+
FB
IN
XXX
Cl2: Yellow
SO2: Orange
CO: Red
H2S: Red
-
Figure 7: H2S/CO Detector Wiring
• Oxygen Detector.
White wire to terminal labelled OXY WHT, green wire to terminal labelled OXY
GRN.
Green
White
ECLIPSE
24 VDC
FB
+
IN
XXX
Cl2: Yellow
SO2:Orange
CO: Red
H2S:Red
-
GRN
WHT
BLK
GRN
BLK
WHT
XXX
RED
Figure 8: Oxygen Detector Wiring
Eclipse Detector Head Operator’s Manual 9
6. Guide a three-conductor, shielded cable or three wires in conduit through the top
conduit hub of the junction box.
7. Connect the three wires to the power/signal terminal strip as follows.
• Connect the +24 VDC wire to the terminal labeled 24 VDC IN +.
• Connect the feedback wire to the terminal labeled FB.
• Connect the - wire to the terminal labeled 24 VDC IN -.
CAUTION: Leave the ground (shield) wire insulated and disconnected at the Eclipse.You will
connect the opposite end of the cable’s ground wire at the device.
8. Re-install the control PCB (and ribbon cable if necessary). Be sure the ribbon cable is
routed down below the control PCB so it will not be damaged by the cover when it is
screwed back on.
9. Secure the junction box cover to the junction box.
10. At the recording device, gas monitor controller, or programmable controller, connect
the cable’s ground (shield) wire to an available chassis ground.
Start Up
This section describes procedures to start up the Eclipse and place the detector head into
normal operation.
Introducing Incoming Power
1. Complete the installation procedures described earlier in this manual.
2. Verify that the power and detector wiring is correct and secure.
3. Turn on or plug in the incoming power at the power source end.
4. Verify that the LCD display is indicating the gas reading.
CAUTION: Allow the detector to warm up for 15 minutes before you continue with the next
section, “Setting the Fresh Air Signal.”
Setting the Fresh Air Signal
Note: For combustible gas and toxic versions of the Eclipse, setting the fresh air signal
requires setting the zero signal. For oxygen versions it requires adjusting the
span setting.
CAUTION: If you suspect the presence of combustible gas, toxic gas, or that the oxygen content
is not normal in the monitoring environment, use the calibration kit and the zero air
calibration cylinder to introduce “fresh air” to the detector and verify an accurate
fresh air setting.
10 Eclipse Detector Head Operator’s Manual
Verify that the transmitter is in a fresh air environment (environment known to be free of
the target gas and combustible or toxic gas vapors and of normal oxygen content, 20,9%).
If a fresh air environment cannot be verified, see the calibration section for instructions on
how to use a zero air cylinder. Leave the junction box cover on during this entire
procedure.
WARNING: The Eclipse is not an active gas monitoring device during the zero
procedure. The 4-20 mA output signal will “freeze” at the level it was at
just before entering the Calibration Menu. It will not indicate current
readings until the Eclipse is in normal operation again.
Combustible and Toxic versions, Setting the Zero Signal
1. Enter the Calibration Menu.
• Press and release (cover and uncover) the optical switch with your finger 3 times
and then press and hold your finger over the switch. After each press and release
(cover and uncover), a number will display in the upper right of the LCD
indicating how many times the sensor has been pressed. If you hold your finger
over the sensor, an “H” will appear in place of the number in the upper right
indicating that you are pressing and holding.
• After 5 seconds, the following will display: CAL MODE HOLD SW. If you hold
your finger over the sensor for 5 more seconds, the following will display:
RELEASE to ZERO. Release your finger at this time and the current reading will
display with the message ZERO in the upper left of the display and an “R” in the
upper right indicating that the Eclipse is ready for a zero operation.
NOTE: If there is no switch activity for 60 seconds while the screen indicates that the unit
is ready for a zero operation, the unit will return to normal operation.
2. Press and release the optical switch once. The Eclipse will perform a zero adjust which
will take approximately 3 seconds and then return to the ready screen.
3. Press and release the optical switch 3 times. A “3” will display in the upper right of
the LCD and after a few seconds the unit will return to normal operation.
Oxygen version, Adjusting the Span Setting
1. Enter the Calibration Menu.
• Press and release (cover and uncover) the optical switch with your finger 3 times
and then press and hold your finger over the switch. After each press and release
(cover and uncover), a number will display in the upper right of the LCD
indicating how many times the sensor has been pressed. If you hold your finger
over the sensor, an “H” will appear in place of the number in the upper right
indicating that you are pressing and holding.
2. After 5 seconds, the following will display: CAL MODE HOLD SW. If you hold your
finger over the sensor for 10 more seconds, the following will display: RELEASE to
SPAN. Release your finger at this time and the current reading will display with the
message SPAN in the upper left of the display and an “R” in the upper right
indicating that the Eclipse is ready for a span adjustment.
Eclipse Detector Head Operator’s Manual 11
NOTE: If there is no switch activity for 5 minutes while the screen indicates that the unit
is ready for a span operation, the unit will return to normal operation.
3. Adjust the reading to 20.9 if necessary.
• If the reading is below 20.9, press and hold the optical switch to increase the
reading. Initially the reading increases slowly. If a large adjustment is needed,
continue to hold and after a few seconds the reading will increase at a faster rate.
Release when the desired reading is reached.
• If the reading is above the 20.9, press and release once and then press and hold to
decrease the reading. Initially the reading decreases slowly. If a large adjustment
is needed, continue to hold and after a few seconds the reading will decrease at a
faster rate. Release when the desired reading is reached.
4. Press and the release the optical sensor 3 times. After a few seconds the Eclipse will
return to normal operation.
NOTE: If there is no switch activity for 60 seconds while the screen indicates that the unit
is ready for a zero operation, the unit will return to normal operation.
Replacing Components of the Eclipse
Replacing the gas detector
Note: The entire detector must be changed when necessary for the combustible gas,
oxygen, Cl2, and SO2 versions of the Eclipse. The detectors in the CO and H2S
versions have a replaceable sensor. The entire CO and H2S detectors do not
normally need replacement, just the sensors inside the stainless steel housing.
See the next section, Replacing the CO and H2S Sensors, for directions to replace
the CO and H2S sensors.
1. Turn off or disconnect power at the power source end.
2. Remove the junction box cover.
3. Grasp the round Eclipse nameplate though which the LCD display is visible.
4. Gently pull until the control PCB is pulled away from the junction box. The detector
and power/signal terminal strips are now visible on the interconnect PCB. Take care
not to pull too hard and damage the cable which connects the top and bottom PCB’s.
5. If necessary, disconnect the cable from the interconnect PCB and lay it aside with the
control PCB.
6. Disconnect the detector leads from the detector terminal strip. Note the position of the
color-coded leads as you remove them.
7. Unscrew the detector from the junction box.
8. Guide the detector leads of the replacement detector through the bottom conduit hub
of the junction box, then screw the mounting threads of the detector into the conduit
hub.
9. Connect the detector leads to the detector terminal strip as follows:
• Combustible gas detector.
Red wire to terminal labelled LEL RED, white to terminal labelled LEL WHT,
Eclipse Detector Head Operator’s Manual 12
green wire to terminal labelled LEL GRN, black wire to terminal labelled LEL
BLK.
• CO or H2S gas detector.
Red wire to terminal labeled TOXIC RED, black wire to terminal labelled TOXIC
XXX.
• Oxygen gas detector.
Green wire to terminal labelled OXY GRN, white wire to terminal labelled OXY
WHT.
CAUTION: Allow the replacement detector to warm up for 15 minutes before you continue with
the next step.
10. Re-install the control PCB (and ribbon cable if necessary). Be sure the ribbon cable is
routed down below the control PCB so it will not be damaged by the cover when it is
screwed back on.
11. Secure the junction box cover to the junction box.
12. Calibrate the replacement detector as described in the Calibration section of this
manual.
Replacing the CO and H2S Sensors
1. Turn off or disconnect power at the power source end.
2. Unscrew the bottom section of the CO or H2S detector housing from the top section.
3. Unplug and remove the sensor.
NOTE: The CO sensor has a charcoal disk filter held onto it by a rubber retaining boot.
When replacing a CO sensor, remove this filter and boot from the old sensor. RKI
instruments recommends replacing the charcoal disk filter whenever a CO
sensor is replaced. Re-install the charcoal disk filter and retaining boot before
continuing.
4. Carefully match the replacement sensor’s male pins with the 4-socket pattern in the
top section and plug it in.
5. Screw the bottom section of the detector housing into the top section.
6. Secure the junction box cover to the junction box.
7. Turn on power at the power source end.
8. Calibrate the detector as described in the Calibration section of this manual.
Replacing the CO Sensor Charcoal Filter
1. Turn off or disconnect power at the power source end.
2. Unscrew the bottom section of the CO or H2S detector housing from the top section.
3. Remove the rubber retaining boot with the charcoal filter disk from the sensor.
4. Replace the charcoal filter disk in the rubber retaining boot and install the boot onto
the sensor.
5. Screw the bottom section of the detector housing into the top section.
6. Turn on power at the power source end.
Eclipse Detector Head Operator’s Manual 13
Calibration, Combustible and Toxic
Versions
This section describes how to calibrate the combustible gas and toxic gas versions of the
Eclipse. It includes procedures to prepar e for calibration, enter the Calibrate menu, set the
zero reading, set the response reading, and return to normal operation. See the next
section, Calibration, Oxygen Version, for instructions to calibrate an oxygen Eclipse.
WARNING: The Eclipse is not an active gas monitoring device during the calibration
procedure. The 4-20 mA output signal will “freeze” at the level it was at
just before entering the Calibration Menu. It will not indicate current
readings until the Eclipse is in normal operation again.
Preparing for Calibration
NOTE: The following procedure assumes the use of a calibration kit which includes a
calibration gas cylinder , zero air cylinder, fixed flow regulator , calibration cup for
the appropriate sensor, and a short piece of sample tubing to connect the
regulator to the calibration cup.
NOTE: The following procedure assumes that hazardous gases are present. If a fresh air
environment can be verified, applying zero air to the sensor is not necessary
when setting the zero reading.
1. Connect the regulator to the calibration cup using the sample tubing.
2. Install the calibration cup over the detector, then screw the regulator into the zero air
calibration cylinder.
3. Allow zero air to flow over the sensor for 1 minute then proceed.
Entering the Calibration Menu
1. Press and release (cover and uncover) the optical switch with your finger 3 times and
then press and hold. After each press and release, a number will display in the upper
right of the LCD indicating how many times the sensor has been pressed and
released. If you press and hold your finger over the sensor, an “H” will appear in the
upper right indicating that you are pressing and holding.
2. After 5 seconds, the following will display: CAL MODE HOLD SW. If you hold your
finger over the sensor for 5 more seconds, the following will display: RELEASE to
ZERO. Release your finger at this time and the current reading will display with the
message ZERO in the upper left of the display and an “R” in the upper right
indicating that the Eclipse is ready for a zero operation.
NOTE: If there is no switch activity for 60 seconds while the screen indicates that the unit
is ready for a zero operation, the unit will return to normal operation.
Eclipse Detector Head Operator’s Manual 14
Setting the Zero Reading
1. Verify that the gas reading has stabilized.
2. Press and release the optical switch once. The Eclipse will perform a zero adjust which
will take approximately 3 seconds and return to the ready screen.
3. Unscrew the regulator from the zero air calibration cylinder.
Leave the sample tubing connected to the regulator and the calibration cup.
Setting the Response Reading
1. Press and release the optical switch 3 times and then press and hold.
2. After approximately 5 seconds, the following will display: RELEASE to SPAN.
Release your finger at this time and the current reading will display with the message
SPAN in the upper left of the display and an “R” in the upper right indicating that the
Eclipse is ready for a span operation.
NOTE: If there is no switch activity for 5 minutes while the screen indicates that the unit
is ready for a span operation, the unit will return to normal operation.
3. Screw the regulator onto the target gas cylinder.
4. Allow gas to flow over the sensor for 2 minutes.
5. Adjust the reading to match the target gas concentration if necessary.
• If the reading is below the target gas concentration, press and hold the optical
switch to increase the reading. Initially the reading increases slowly. If a large
adjustment is needed, continue to hold and after a few seconds the reading will
increase at a faster rate. Release when the desired reading is reached.
• If the reading is above the target gas concentration, press and release once and
then press and hold to decrease the reading. Initially the r eading decreases slowly.
If a large adjustment is needed, continue to hold and after a few seconds the
reading will decrease at a faster rate. Release when the desired r eading is r eached.
6. Unscrew the regulator from the gas cylinder.
7. Remove the calibration cup from the sensor.
8. Press and the release the optical sensor 3 times. After a few seconds the Eclipse will
return to normal operation.
Eclipse Detector Head Operator’s Manual 15
Calibration, Oxygen Version
This section describes how to calibrate the oxygen version of the Eclipse. It includes
procedures to prepare for calibration, enter the Calibrate menu, set the zero reading, set
the response reading, and return to normal operation. See the previous section,
Calibration, Combustible and Toxic Versions, for instructions to calibrate a combustible
gas or toxic gas Eclipse.
WARNING: The Eclipse is not an active gas monitoring device during the calibration
procedure. The 4-20 mA output signal will “freeze” at the level it was at
just before entering the Calibration Menu. It will not indicate current
readings until the Eclipse is in normal operation again.
Preparing for Calibration
NOTE: The following procedure assumes the use of a calibration kit which includes a
100% nitrogen gas cylinder , zer o air cylinder, fixed flow regulator, calibration cup
for the oxygen sensor , and a short piece of sample tubing to connect the regulator
to the calibration cup.
1. Connect the regulator to the calibration cup using the sample tubing.
2. Install the calibration cup over the detector, then screw the regulator into the 100%
nitrogen calibration cylinder.
3. Allow 100% nitrogen to flow over the sensor for 1 minute then proceed.
Entering the Calibration Menu
1. Press and release (cover and uncover) the optical switch with your finger 3 times and
then press and hold. After each press and release, a number will display in the upper
right of the LCD indicating how many times the sensor has been pressed and
released. If you press and hold your finger over the sensor, an “H” will appear in the
upper right indicating that you are pressing and holding.
2. After 5 seconds, the following will display: CAL MODE HOLD SW. If you hold your
finger over the sensor for 5 more seconds, the following will display: RELEASE to
ZERO. Release your finger at this time and the current reading will display with the
message ZERO in the upper left of the display and an “R” in the upper right
indicating that the Eclipse is ready for a zero operation.
NOTE: If there is no switch activity for 60 seconds while the screen indicates that the unit
is ready for a zero operation, the unit will return to normal operation.
Setting the Zero Reading
1. Verify that the oxygen reading has stabilized.
2. Press and release the optical switch once. The Eclipse will perform a zero adjust which
will take approximately 3 seconds and return to the ready screen.
3. Unscrew the regulator from the 100% nitrogen calibration cylinder.
Leave the sample tubing connected to the regulator and the calibration cup.
Eclipse Detector Head Operator’s Manual 16
Setting the Response Reading
NOTE: The following procedure assumes that the oxygen content is not normal (20.9%).
If a fresh air environment can be verified, applying zero air to the sensor is not
necessary when adjusting the span setting.
1. Press and release the optical switch 3 times and then press and hold.
2. After approximately 5 seconds, the following will display: RELEASE to SPAN.
Release your finger at this time and the current reading will display with the message
SPAN in the upper left of the display and an “R” in the upper right indicating that the
Eclipse is ready for a span adjustment.
NOTE: If there is no switch activity for 5 minutes while the screen indicates that the unit
is ready for a span operation, the unit will return to normal operation.
3. Screw the regulator onto the zero air calibration cylinder.
4. Allow gas to flow over the sensor for 2 minutes.
5. Adjust the reading to 20.9% if necessary.
• If the reading is below 20.9, press and hold the optical switch to increase the
reading. Initially the reading increases slowly. If a large adjustment is needed,
continue to hold and after a few seconds the reading will increase at a faster rate.
Release when the desired reading is reached.
• If the reading is above 20.9, press and release once and then press and hold to
decrease the reading. Initially the reading decreases slowly. If a large adjustment
is needed, continue to hold and after a few seconds the reading will decrease at a
faster rate. Release when the desired reading is reached.
6. Unscrew the regulator from the zero air gas cylinder.
7. Remove the calibration cup from the sensor.
8. Press and the release the optical sensor 3 times. After a few seconds the Eclipse will
return to normal operation.
Eclipse Detector Head Operator’s Manual 17
Parts List
Table 6 lists replacement parts and accessories for the Eclipse Detector Head.
Table 2: Parts List
Part Number Description
06-1248RK Sample tubing (3/16 in. x 5/16 in.; specify length when ordering)
07-0203RK Rubber retaining boot for charcoal filter
18-0405RK-01 Junction box w/o cover
18-0404RK Junction box cover, with lens
33-7101RK Charcoal filter disk
61-0140RK LEL detector
65-2510RK Oxygen sensor
71-0036RK Eclipse Detector Head Operator’s Manual (this document)
81-0007RK-01 Calibration cylinder, 50% LEL Hexane; 34 liter steel
81-0012RK-01 Calibration cylinder, 50% LEL Methane; 34 liter steel
81-0064RK-01 Calibration cylinder, CO, 50 ppm in air, 34 liter steel
81-0076RK-01 Zero air calibration cylinder,34 liter steel
81-0078RK-01 Calibration cylinder, 100% nitrogen, 34 liter steel
81-0151RK-04 Calibration cylinder, H2S, 25 ppm in nitrogen, 34 liter aluminum
81-1003RK Regulator, 0.5 liter/minute continuous flow, for combustible gas,
nitrogen, and CO cylinders.
81-1004RK Regulator, 0.5 liter/minute continuous flow, for H2S cylinder
81-1117RK Calibration cup
ES-1531-CO CO sensor, plug-in
ES-1537-H2S H2S sensor, plug-in
Eclipse Detector Head Operator’s Manual 18
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