Part Number: 71-0233RK
Revision: P1
65-2484RK-06
Multi Point Detector
Operator’s Manual
Released: 7/20/11
RKI Instruments, Inc.
www.rkiinstruments.com
WARNING
Read and understand this instruction manual before operating
detector . Improper use of the dete ctor could result in bodily harm
or death.
Periodic calibration and maintenance of the detector is essential
for proper operation and correct readings. Please calibrate and
maintain this detector regularly! Frequency of calibration
depends upon the type of use you have and the sensor types.
T ypical calibration frequencies for most applications a re between
3 and 6 months, but can be required more often or less often
based on your usage.
65-2484RK-06 Multi Point De tector
Product Warranty
RKI Instruments, Inc. warrants gas alarm equipment sold by us to be free from defects in
materials, workmanship, and performance for a period of one year fr o m date of shipment
from RKI Instruments, Inc. Any parts found defective withi n tha t period will be repaired
or replaced, at our option, free of charge. This warranty does not apply to those items
which by their nature are subject to deterioration or consumption in normal ser v ice, and
which must be cleaned, repaired, or replaced on a routine basis. Examples of such items
are:
W arranty is voided by abuse including mechanical damage, alteration, rough handling, or
repair procedures not in accordance with the operator’s manual. This warranty indicates
the full extent of our liability , a nd we are not r esponsible for removal or r eplacement costs,
local repair costs, transportation costs, or contingent expenses incurred without our prior
approval.
a) Absorbent cartridges d) Batteries
b) Pump diaphragms and valves e) Filter elements
c) Fuses
THIS WARRANTY IS EXPRESSLY IN LIEU OF ANY AND ALL OTHER
WARRANTIES AND REPRESENTATIONS, EXPRESSED OR IMPLIED,
AND ALL OTHER OBLIGATIONS OR LIABILITIES ON THE PART OF
RKI INSTRUMENTS, INC. INCLUDING BUT NOT LIMITED TO, THE
WARRANTY OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE. IN NO EVENT SHALL RKI INSTRUMENTS,
INC. BE LIABLE FOR INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
LOSS OR DAMAGE OF ANY KIND CONNECTED WITH THE USE OF
ITS PRODUCTS OR FAILURE OF ITS PRODUCTS TO FUNCTION OR
OPERATE PROPERLY.
This warranty covers instruments and parts sold to users by authorized distributors,
dealers, and representatives as appointed by RKI Instruments, Inc.
We do no t as su me indemnif ic a t ion for any accident or d amage caused b y t he op e r a t ion of
this gas monitor, and our warranty is limited to the replacement of parts or our complete
goods.
65-2484RK-06 Multi Point Detector
Table of Contents
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Detectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Conduit Seal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Junction Box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Mounting the Multi-Point Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Wiring the Multi-Point Detector to a Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Startup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Introducing Incoming Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Setting the Zero (Fresh Air) Reading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Replacing Components of the Multi-Point Detector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Calibration, LEL and H2S Detectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Preparing for Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Setting the Zero Reading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Setting the Response Reading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Returning to Normal Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Calibration, Oxygen Detector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Preparing for Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Setting the Fresh Air Reading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Setting the Zero Reading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Returning to Normal Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Calibration, SO2 Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Preparing for Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Setting the Zero Reading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Setting the Response Reading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Returning to Normal Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
65-2484RK-06 Multi Point De tector
Overview
This manual describes the 65-2484RK-06 multi point direct connect detector. This manual
also describes how to install, start up, maintain, and calibrate the detector when it is used
with a gas monitoring controller. A parts list at the end of this manual lists replacement
parts and accessories for the detector.
Specifications
WARNING: Do not use this product in a manner not specified in thi s instruction
manual.
Table 1 lists specifications for the multi-point detect or.
Table 1: Specifications
Target Gas LEL/O
S/SO2, methane calibration standard for LEL
2/H2
*Note: Since the 65-2484RK-06 is a direct connect detector, the
calibration is done at the controller.
Sampling Method Diffusion
Detection Range LEL: 0 to 100 %LEL (lower explosive limit)
: 0 to 25 %volume
O
2
H
S: 0 to 100 ppm (parts per million)
2
: 0 to 6.00 ppm (parts per million)
SO
2
Response Time 90% in 30 seconds
Accuracy Catalytic Combustible Gas
:
± 5% of reading or ± 2% LEL (whichever is greater)
Oxygen
± 0.5% O
:
2
Hydroge n Sulfide:
± 5% of reading or ± 2 ppm H2S (whichever is greater)
Sulphur Dioxide
:
± 10% of reading or ± 5% of full scale (whi chever is greater)
Operating Temperature 23°F to 104°F (-5°C to 40°C)
65-2484RK-06 Mult i P o in t D e te c to r • 1
NOTE: The following symbol on the detector label is a caution to the user to refer to this
!
documentation for installation and operation instructions:
WARNING: When using the 65-2484RK-06, you must follow the instructions and
warnings in this manual to assure proper and safe opera tion of the
65-2484RK-06 and to minimize the risk of personal injury. Be sure to
maintain and periodically calibrate the 65-2484RK-06 as described in this
manual.
2 • 65-2484RK-06 Multi Point Detector
Description
This section describes the multi-point detector. It consists of the detectors, the terminal
strips, the conduit seal, and the junction boxes.
Detectors
This section describes the components of the various detectors that are used with each
model of the 65-2484RK-06.
61-0140RK LEL Detector
LEL Detector
Figure 1: 61-0140RK LEL Detector Component Location
The combustible gas detector is a catalytic type detector that produces an electrical output
that corresponds to the detection range. It is packaged in a 1/2 inch NPT nipple with a
sintered metal flame arrestor on one end allowing ambient air to diffuse into the detector.
The flame arrest or al so co ntai n s any s park s whi ch may occur within the detect or. The 1/2
inch NPT mounting threads at the top of the detector allow you to install it in the bottom
conduit hub of the junction box with the use of a 3/4 in. x 1/2 in. NPT reducer. A
rainshield screws onto the bottom of the detector (flame arrestor end). The rainshield
helps protect the detector from rain and debris in the monitoring environment. Four colorcoded leads extend from the top of the detector. The leads allow you to connect the
detector to the terminal block.
65-2484RK-06 Mult i P o in t D e te c to r • 3
Oxygen Detector
The detector consists of the oxygen sensor, the detector housing body, detector housing
cap, and cap gasket.
Detector Housing Body
Cap Gasket
Plug-in Oxygen Sensor
Detect or Housing Cap
Flame Arrestor
Guard
Figure 2: Oxygen Detector Component Location
Detector Housing Body
The detector housing body protects the electronic components within the housing. Use the
mounting threads at the top of the housi ng to screw the oxygen detector into the 3/4”
NPT hub on the bottom of the junction box. Two wires extend from the top of the detector
housing body . Use these wires to connect the oxygen detector to the terminal block. One of
the wires is white and one of the wires is green.
The housing includes two sockets installed on a circuit board. These sockets accept the
plug-in sensor’s two pins to provide electrical connection for the sensor. The circuit board
with the sockets conditions the sensor’s signal before the signal reaches the controller.
Housing Cap & Cap Gasket
The housing cap screws onto the detector housing. It retains the plug-in sensor and
protects it from damage. A foam gasket is installed inside the ho using cap that seals
against the sensor face. The housing cap also includes a flame arrestor which contains any
sparks that may occur within the detector and a flam e arrestor guard wh ich protects th e
flame arrestor from damage. Unscrew the detector cap to access the plug-in sensor for
maintenance or replacement. A cap gasket seals the interface between the housing and
cap.
Plug-in Oxygen Sensor
The plug-in sensor is secured in the detector assembly by the housing cap. It has two pins
that mate with the sockets in the detector housing body. Through a series of chemical and
electrical reactions, the sensor produces an electrical output that corresponds to the
detection range of the transmitter.
4 • 65-2484RK-06 Multi Point Detector
H2S Detector
The detector consists of the H
S sensor, the detector housing body, detector housing cap,
2
and cap gasket.
Detector Housing Body
Cap Ga s ket
Pl u g- In H2S Sen sor
Detector Housing Cap
Flame Arrestor
Guard
Figure 3: H
Detector Housing, Housing Cap, & Cap Gasket
The detector housing protects the sensing components within the housing. Use the
mounting threads at the top of the housing to screw the H
Use the removable cap near the bottom of the housing to access the sensor for
maintenance or replacement. The cap protects the sensor from damage and includes a
flame arrestor which contains any sparks which may occur within the detector housing. A
cap gasket seals the interface between the housing and cap. A flame arrestor guard is
permanently bonded to the cap.
S Detector Component Location
2
S detector into a 3/4” NPT hub.
2
Two wires extend from the top of the detector housing. Use these wires to connect the H
2
detector to the multi-point detector. The housing includes a four-socket pattern. This
socket pattern accepts the sensor’s four pins to secure the sensor within the detector
housing. A pre-amplifier, located between the sockets and two interconnect wires,
conditions the sensor’s signal before the signal reaches the controller.
Sensor
The sensor is secured within the sensor housing by the detector housing cap. It has four
pins that mate with the sockets in the detector housing body . Thr ough a series of chemical
and electrical reactions, the sensor produces an electrical output that is proportional to the
detection range of the detector.
65-2484RK-06 Mult i P o in t D e te c to r • 5
S
SO2 Detector
The 65-2300RK-SO2 detector consists of the detector housing body, detector housing cap,
splashguard, cap gasket, and the plug -in sensor.
Detector Housi ng Body
Cap Gasket
Plug-In SO2 Sensor
Detector Housi ng
Cap
Splash Guard
(removable)
Figure 4: SO
Detector Housing Body
Toxic Detector Component Location
2
The detector housing body protects the electronic components within the housing. Use the
mounting threads at the top of the housi ng to screw the toxic detector into a 3/4” NPT
hub. Two wires extend from the top of the detector housing body. Use these wires to
connect the toxic detector to a controller. One of the wires is black and one of the wires is
blue.
The housing body includes a 12 position connector at the bottom of the housing body. The
plug-in sensor mates to this connector. A pre-amplifier located between the connector and
the two interconnect wires conditions the sensor’s sign al before the signal reaches the
controller.
Housing Cap, Cap Gasket, & Splashgu ard
The housing cap screws onto the detector housing. It retains the sensor and protects it
from damage. A removable splashguard is screwed onto the detector cap to protect the
sensor from impact damage, direct water spray, and splashing. Unscrew the detector cap
to access the sensor for maintenance or replacement. A cap gasket seals the interface
between the housing and cap.
Plug-in Sensor
The plug-in sensor is secured in the dete ctor assembly by the housing cap. Through a
series of chemical and electrical reactions, the sensor produces an electrical output that
corresponds to the detection range of the sensor.
Conduit Seal
The conduit seal isolates the volumes of the 2 junction boxes.
6 • 65-2484RK-06 Multi Point Detector
Installation
Junction Boxes
Use the junction boxes to install the multi-point detector at a mounting site that is remote
from the controller. The junction boxes protect the terminal strips and wiring connections
made to the terminal strips. Use the top 3/4’’ conduit hub to connect wiring from the
terminal strips to the controller. Use the cover on the front of the junction boxes to access
the interior of the junction boxes. The detectors and terminal strips are factory installed in
the junction boxes.
This section describes procedures to mount the multi-point detector in the monitoring
environment and wire the detector to a controller.
Mounting the Multi-Point Detector
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 detector is not likely to be bumped or disturbed. Ma ke sur e
there is sufficient room to perform start-up, maintenance, and calibration
procedures.
• Select a site where the target gases are likely to be found first.
65-2484RK-06 Mult i P o in t D e te c to r • 7
0
19.0 Max.
.20 DIA X .45 Slot, (2X) , mounting
7.50
3.15
2.40
3/4 NPT Hubs (4X)
3.11
.25
1.25
H2S Detector
Sealed Wire Conduit
3/4" NP T Nipple (2X)
LEL Detect or
2. At the mounting site you select, use #10 screws to mount the detector to a vertical
SO2 Det ector
3.0
3.0
Oxy gen Detector
7.6
Figure 5: Outline & Mounting Dimensions 65-2484RK-06
surface.
1.1
CAUTION: Mount the multi-point detector with the detectors facing down (see Figures 5).
NOTE: If your application does not require a specific mounting site, mount the detector
at approximately breathing level.
8 • 65-2484RK-06 Multi Point Detector
Wiring the Multi-Point Detector to a Controller
WARNING: Always verify that the power source is OFF bef ore you make wiring
connections.
1. Turn off the controller.
2. Turn off or unplug p ower to the controller.
3. Remove the junction box cover from the top junction box.
4. Guide a ten-conductor, shielded cable, or ten wires in conduit through the top conduit
hub of the junction box. Use appropriate conduit fittings and construction technique
for the environmental rating of the junction box. The junction box is rated NEMA 4X.
5. Connect the wires to the multi-point detector using the terminal blocks in the top
junction box.
CAUTION: If using shielded cable, leave the drain wire insulated and disconne cted at the m ulti-
point detector. You will connect the op posite end of the cable’s drain wire at the
controller.
6. Secure the junction box cover to the junction box.
7. Route the cable or wires leading from the multi-point detector through one of the
conduit hubs at the controller housing. Use appropriate conduit fittings and
construction technique for the environmental rating of the controller. RKI controllers
are typically rated NEMA 4X.
CAUTION: Do not route power and multi-point detector wiring through the same conduit hub.
The power cable ma y di sr u pt th e tr a nsm ission of the detector s ig nal to the control l er.
8. Connect the wires to the applicable controller terminal strips. See the controller
operator’ s manual and the controller’s detector head specification sheet. Also see
Figure 6 for a wiring diagram..
65-2484RK-06 Mult i P o in t D e te c to r • 9
BLK
LEL
CONTROLLER TERMINALS
GRN
WHT
RE D
BLACK
RE D
RE D
WHITE
GREEN
BLACK
GREEN
WHI TE
RE D
BLK
BLK
BLUE
WHT
GRN
CONTROLLER TERMINALS
BLACK
BLUE
H2S
SO2
OXY
H2S DETECTOR
RE D
WHI TE
GREEN
BLACK
RE D
WHITE
GREEN
SO2
WHITE
GREEN
DETECTOR
BLACK
WHI TE
GREEN
LEL DETECTOR
Figure 6: Wiring the 65-2484RK-06 to a Controller
10 • 65-2484RK-06 Multi Point Detector
OXYGEN DETECTOR
Start Up
9. Connect the cable’s dr ain wire to an available chassis ground at the controller. RKI
controllers typically have a ground stud that can be used to ground the cable’s drain
wire.
This section describes procedures to start up the multi-point detector and place the
detector into normal operation.
Introducing Incoming Power
1. Complete the installation procedures described earlier in this manual.
2. Verify that the power wiring to the controller is correct and secure. Refer to the
controller operator’s manual.
3. Tu rn on power to the controller.
4. Turn on the controller.
5. Verify that the controller is on and operating properly. Refer to the con troller
operator’s ma nual.
CAUTION: Allow the multi-point detector to warm up for 5 minutes before you continue with
the next section, “Setting the Zero (Fresh Air) Reading”.
Setting the Zero (Fresh Air) Reading
CAUTION: If you suspect the presence of a target gas in t he monitoring environment, use the
calibration kit and a zero air calibration cylinder to introduce “fresh air” to the
desired detector and verify an accurat e zero setting. See the Calibration section for
instructions to introduce zero air to the desired detector.
1. Verify that the detector is in a fresh air environment (environment known to be free of
toxic and combustible gases, and of normal oxygen content, 20.9%).
2. At the controller, verify a reading of:
• 0 %LEL for combustible gas
• 20.9% for oxygen
• 0 ppm for H
If the display reading is the appropriate fresh air reading, start up is complete. The
detector is in normal operation. If the display reading is not the appropriate fresh air
reading, continue with step 3.
3. Perform a zeroing operation at the controller. See the contr oller operato r’s manual for
directions.
S or SO
2
2
65-2484RK-06 Mul ti Po in t De te c to r • 1 1
Maintenance
This section describes maintenance procedures. It includes preventive maintenance,
troubleshooting, and component replacement procedures.
Preventive Maintenance
This section describes a preventive maintenance schedule to ensure the optimum
performance of the multi-point detector. It includes daily, monthly, and quarterly
procedures.
Daily
At the controller, verify a display reading of:
• 0 %LEL for combustible gas
• 20.9% for oxygen
• 0 ppm for H
S or SO
2
2
Investigate significant changes in the display reading.
Monthly
This procedure describes a test to verify that each detector in the multi-point detector
responds properly to its target gas. It describes a test using a fixed flow regulator with an
on/off knob. RKI Instruments, Inc. recommends using a 0.5 LPM (liters per minute) fixed
flow regulator.
WARNING: The SO2 detector calibration cup is different than that of the LEL/O2/H2S
detectors. Ensure that you are using the correct calibration cup for the
detector your testing.
NOTE: Performing a response test on the multi-point detector may cause alarms. Be sure
to put the controller into its calibration program or disable external alarms befor e
performing this test.
Preparing for the response test
1. Place the controller into its calibration program or disable external alarms.
2. Verify tha t the controller display reading for the channel you are testing is:
• 0 %LEL for combustible gas
• 20.9% for oxygen
• 0 ppm for H
S or SO
2
If the display reading is not the appropriate fresh air reading, set the zero reading of
the detector as described in the Start Up section of this manual, then continue this
procedure.
3. Screw the calibration cup onto the bottom of the detector you are testing if you are
testing an LEL, O
, or H2S detector. If you are testing the SO2 detector, unscrew the
2
splashguard before pushing on the calibration cup.
4. Screw the regulator into the calibration cylinder.
12 • 65-2484RK-06 Multi Point Detector
2
NOTE: Ensure that you are using an appropriate calibration cylinder for the channel you
are testing.
5. Use the calibration kit sample tubing to connect the regulator to the calibration cup.
Performing the response test
1. Turn the regulator’s on/off knob counterclockwise to open the regulator. Gas will
begin to flow.
2. Allow the gas to flow for two minutes, then verify that the reading is within ± 20% of
the cylinder gas concentration.
NOTE: If the reading is not within ± 20% of the correct response reading, calibrate the
detector as described in the Calibration section of this manual.
3. Turn the regulator’s on/off knob clockwise to close the regulator.
4. Unscrew the regulator from the calibration cylind er.
5. For any additional detectors that you want to test, move the calibra tion cup to the
detector, screw the regulator into the appropriate gas cylinder and repeat steps 1-4.
6. Unscrew the calibration cup from the detector if you are testing an LEL, O
detector. If you are testing the SO
detector, screw the splashguard back onto the
2
, or H2S
2
detector.
7. When the controller display reading falls below th e alarm setpoints, return the
controller to normal operation.
8. Store the components of the calibration kit in a safe place.
Quarterly
Calibrate the multi-point detector as described in the Calibration section of this manual.
65-2484RK-06 Mul ti Po in t De te c to r • 1 3
Troubleshooting
The troubleshooting guide describes symptoms, probable causes, and reco mmended
action for problems you may encounter with the multi-poin t det ect or.
NOTE: This troubleshooting guide describes multi-point detector problems only. See the
controller operator’s manual for problems you may encounter with the
controller.
Table 2: Troubleshooting the Multi-Point Detector
Condition Symptom(s) Probable Causes Recommended Action
Fail Condition Controller indicates a
fail condition.
Slow or No
Response/
Difficult or
Unable to
Calibrate
• Detector responds
slowly or does not
respond to response
test.
• Unable to accurately
set the zero or
response reading
during calibration.
• Detector requires
frequent calibration.
Note: Under “normal”
circumstances, the
transmitter requires
calibration once every 3
months.
Some applications
may require a more
frequent calibration
schedule.
• The detector wiring is
disconnected or
misconnected.
•The O
, H2S, or SO2
2
plug-in sensor is not
properly plugged into
the sockets in the
detector housing body.
• The detector’s zero
reading is low enough
to cause a fail
condition.
• The detector is
malfunctioning.
• The calibration cylinder
is low, out-dated, or
defective.
• The flame arrestor on
the LEL detector or in
the O
, or H2S detector
2
housing cap is wet or
clogged with dirt or
other particulates.
• The calibration gas is
not an appr opriate
concentration.
• The detector is
malfunctioning.
1. Verify that the detector wiring is
correct and secure.
2. Confirm that the O
, H2S, or SO2
2
plug-in sensor is installed properly.
3. Perform a zero adjustment. A full
calibration is recommended.
4. If the fail condition continues, replace
, H2S, or SO2 plug-in sensor as
the O
2
described later in this section.
5. If the fail condition continues, contact
RKI for further instruction.
1. Verify that the calibration cylinder
contains an adequate supply of a
fresh test sample.
2. Check the LEL detector or detector
housing cap to determine if the flame
arrestor is wet or dirty. Check the
sensor face of the SO
plug-in sensor
2
to determine if it is wet or dirty. Clean
if necessary.
3. Verify that the calibration gas
concentration is appropriate for each
detector.
4. If the calibration/response difficulties
continue, replace the LEL detector or
the O
, H2S, or SO2 plug-in sensor as
2
described later in this section.
5. If the calibration/response difficulties
continue, contact RKI for further
instruction.
14 • 65-2484RK-06 Multi Point Detector
Replacing Components of the Multi-Point Detector
This section includes maintenance procedures for the LEL detector, the oxygen detector,
the H
S detector, and the SO2 detector.
2
Replacing the LEL Detector
1. Turn off the controller.
2. Turn off or unplug incoming power to the controller.
3. Remove the junction box cover from the bottom junction box.
4. Disconnect the detector leads from the terminal block in the junction box. Note the
position of the color-coded leads as you remove them.
5. Unscrew the detector from the junction box hub.
6. Gu ide the detector leads of the replacement detector through the junction box hub
then screw the mounting threads of the detector into the hub. If necessary for
environmental conditions, apply thread sealant or teflon tape to the hub and/or
detector threads to seal them.
7. Connect the detector leads to the terminal block the same way the old detector was
wired. See the controller operator’s manual and the controller’s detector head
specification sheet for the multi-point detector to verify the connections are correct.
Also see Figure 6 for a wiring diagram.
8. Reinstall the junction box cover.
9. Turn on or plug in power to the controller.
10. Turn on the controller.
CAUTION: Allow the replacement detector to warm up for 5 minutes before y o u c o ntinue with
the next step.
11. Calibrate the replacement detector as described in “Calibration, LEL, and H
S,
2
Detectors” on page 19.
Oxygen Detector
This section contains instructions to replace the plug-in oxygen sensor and to replace the
entire detector assembly. In most cases it in not necessary to replace the entire detector
assembly.
Replacing the Plug-In Oxygen Sensor
CAUTION: The plug-in sensor contains electrolyte that is an irritant. Do not disassemble the
sensor when replacing it with a new one. If electrolyte comes in contact with your
skin, wash affected area thoroughly with soap and water.
1. Turn off the controller.
2. Turn off or unplug p ower to the controller.
3. Unscrew the detector housing cap from the detector housing body. Make sure not to
lose the cap gasket.
4. Unplug and remove the oxyge n sensor.
5. Carefully plug the replacement sensor into the socket pattern that is located in the
detector housing.
65-2484RK-06 Mul ti Po in t De te c to r • 1 5
6. Make sure the cap gasket is in place and screw the detector housing cap back onto the
detector housing body.
7. Turn on or plug in power to the controller.
8. Turn on the controller and place into normal operation.
CAUTION: Allow the replacem ent sens or to warm up for 5 minutes before you continue with the
next step.
9. Calibrate the detector as described in “Calibration, O
Replacing the Oxygen Detector
Detector” on page 21.
2
NOTE: In most cases, it is only necessary to replace the oxygen sensor.
1. Turn off the controller.
2. Turn off or unplug incoming power to the controller.
3. Remove the junction box cover from the bottom junction box.
4. Disconnect the detector leads from the terminal block in the junction box. Note the
position of the color-coded leads as you remove them.
5. Unscrew the detector from the junction box hub.
6. Gu ide the detector leads of the replacement detector through the junction box hub
then screw the mounting threads of the detector into the hub. If necessary for
environmental conditions, apply thread sealant or teflon tape to the hub and/or
detector threads to seal them.
7. Connect the detector leads to the terminal block the same way the old detector was
wired. See the controller operator’s manual and the controller’s detector head
specification sheet for the multi-point detector to verify the connections are correct.
Also see Figure 6 for a wiring diagram.
8. Reinstall the junction box cover.
9. Turn on or plug in power to the controller.
10. Turn on the controller.
CAUTION: Allow the replacement detector to warm up for 5 minutes before y o u c o ntinue with
the next step.
11. Calibrate the replacement detector as described in “Calibration, O
page 21.
H
S Detector
2
This section includes a procedure to replace the H
detector assembly. In most cases it is not necess ary to replace the entire detector assembly.
Replacing the Plug-In H2S Sensor
CAUTION: The sensor contains electrolyte which is a dilute acid. Do not dis assemble the sens o r
when replacing it with a new one. If sensor electrolyte comes in co ntact with your
skin, wash affected area thoroughly with soap and water.
16 • 65-2484RK-06 Multi Point Detector
Detector” on
2
S sensor and one to replace the entire
2
1. Turn off the controller.
2. Turn off or unplug p ower to the controller.
3. Unscrew the detector housing cap from the detector housing body. Make sure not to
lose the cap gasket.
4. Unplug an d remove the H
S sensor.
2
5. Carefully plug the replacement sensor into the socket pattern that is located in the
detector housing.
6. Make sure the cap gasket is in place and screw the detector housing cap onto the
detector housing body.
7. Turn on or plug in power to the controller.
8. Turn on the controller.
CAUTION: Allow the r ep la cem ent sens or to w arm up for 5 m inu tes before you continue with the
next step.
9. Calibrate the detector as described in “Calibration, LEL, and H
S, Detectors” on
2
page 19.
Replacing the H2S Detector
NOTE: In most cases, it is only necessary to replace the H2S sensor.
1. Turn off the controller.
2. Turn off or unplug p ower to the controller.
3. Remove the junction box cover from the top junction box.
4. Disconnect the detector leads from the terminal block in the junction box. Note the
position of the color-coded leads as you remove them.
5. Unscrew the detector from the junction box hub.
6. Gu ide the detector leads of the replacement detector through the junction box hub
then screw the mounting threads of the detector into the hub. If necessary for
environmental conditions, apply thread sealant or teflon tape to the hub and/or
detector threads to seal them.
7. Connect the detector leads to the terminal block the same way the old detector was
wired. See the controller operator’s manual and the controller’s detector head
specification sheet for the H
S detector to verify the connections are correct. Also see
2
Figure 6 for a wiring diagram.
8. Reinstall the junction box cover.
9. Turn on or plug in power to the controller.
10. Turn on the controller.
CAUTION: Allow the replacement detector to warm up for 5 minutes before y o u c o ntinue with
the next step.
11. Calibrate the replacement detector as described in “Calibration, LEL, and H
S,
2
Detectors” on page 19.
65-2484RK-06 Mul ti Po in t De te c to r • 1 7
SO2 Detector
This section includes a procedure to replace the SO
sensor and one to replace the entire
2
detector assembly. In most cases it is not necess ary to replace the entire detector assembly.
Replacing the Plug-In SO2 Sensor
CAUTION: The plug-in sensor contains electrolyte which is a dilute acid. Do not disassemble the
sensor when replacing it with a new one. If sensor electrolyte comes in contact with
your skin, wash affected area thoroughly with soap and water.
1. Turn off the controller.
2. Turn off or unplug p ower to the controller.
3. Unscrew the detector housing cap with the spla shguard from the detector housing
body. Make sure not to lose the cap gasket.
4. Unplug and remo ve the toxic sens or.
5. Carefully plug the replacement sensor into the connector that is located in the detector
housing body.
WARNING: You must replace the plug-in sensor with the same type of sensor that is
installed. A detector cannot be converted from one type of detector to
another by using a different plug-in sensor. For example, if you are
replacing an SO2 sensor, you must replace it with an SO2 sensor.
6. Make sure the cap gasket is in place and screw the detector housing cap with the
splashguard back onto the detector housing body.
7. Tu rn on power to the controller.
8. Turn on the controller.
CAUTION: Allow the replacem ent sens or to warm up for 5 minutes before you continue with the
next step.
9. Calibrate the detector as described in “Calibration, SO
Replacing the SO2 Detector
Detector” on page 23.
2
NOTE: In most cases, it is only necessary to replace the plug-in sensor.
1. Turn off the controller.
2. Turn off or unplug incoming power to the controller.
3. Remove the junction box cover from the junction box.
4. Disconnect the detector leads from the terminal block in the junction box. Note the
position of the color-coded leads as you remove them.
5. Unscrew the detector from the junction box conduit hub.
6. Gu ide the detector leads of the replacement detector through the controller conduit
hub or junction box conduit hub, then screw the mounting threads of the detector into
the hub. If necessary for environmental conditions, apply thread sealant or teflon tape
to the hub and/or detector threads to seal them.
18 • 65-2484RK-06 Multi Point Detector
7. Connect the detector leads to the terminal block the same way the old detector was
wired. See the controller operator’s manual and the controller’s detector head
specification sheet for the multi-point detector to verify the connections are correct.
Also see Figure 6 for a wiring diagram.
8. Reinstall the junction box cover.
9. Turn on or plug in power to the controller.
10. Turn on the controller.
CAUTION: Allow the replacement detector to warm up for 5 minutes before y o u c o ntinue with
the next step.
11. Calibrate the replacement detector as described in “Calibration, SO
page 23.
Calibration Frequency
Although there is no particular calibration frequency that is correct for all applications, a
calibration frequency of every 3 months is adequate for most multi-point detector
applications. Unless experience in a particular application dictates otherwise, RKI
Instruments, Inc. recommends a calibration frequency of every 3 months for the multi
point detector.
If an application is not very demanding, for example detection in a clean, temperature
controlled environment, and calibration adjustments a re minima l at calibration, then a
calibration frequency of every 6 months is adequate.
If an application is very demanding, for example if the environment is not well controlled,
then more frequent calibration than every 3 months may be necessary.
Calibration, LEL, and H2S, Detectors
This section describes how to calibrate the LEL and H2S detectors on the multi-point
detector. It includes procedures to prepare for calibration, set the zero reading, set the
response reading, and return to normal o peration. It describes calibration using a
calibration kit that include s an 81-1117RK calibration cup, calibration gas, sample tubing,
and a fixed flow regulator with an on/off knob. RKI Instruments, Inc. recommends using
a 0.5 LPM (liters per minute) fixed flow regulator. To properly calibrate the multi-point
detector , you must calibrate each connected detector . Perform the following procedure for
each connected LEL or H
S detector.
2
Detector” on
2
W ARNING: The controller is not an active gas monitoring device during the calibration
procedure.
Prepari ng for Ca libration
WARNING: Do not remove the junction box cover or detector housing cap while the
circuits are energized unless the area is determined to be non-hazardous.
Keep the junction box cover and detector housing cap tightly closed during
operation.
65-2484RK-06 Mul ti Po in t De te c to r • 1 9
1. Screw the calibration cup onto the bottom of the detector you wish to calibrate.
NOTE: If you can verify that the multi-point detector is in a fresh air environment, you
do not need to apply zero air to the detector before adjusting the zero reading.
2. Screw the regulator into the zero air calibration cylinder. Make sure the regulator is
off. It is off when the on/off knob is turned all the way clockwise.
3. Use the calibration kit sample tubing to connect the fixed flow regulator to the
calibration cup.
4. Put the controller into its calibration program. See the controller operator’s manual
for instructions to enter the calibration program.
NOTE: RKI controllers have a minimum hold feature for zero adjustment and a peak
hold feature for span adjustment. Because of this, the instructions call for turning
off the gas to a detector before making adjustments.
Setting the Zero Reading
1. Follow the directions in the controller operator’s manual for setting the zero reading.
2. When the instructions call for applying z e ro air to the detector, turn the regulator’s
on/off knob counterclockwise to open it. Gas will begin to flow.
3. Allow the gas to flow for two minutes.
4. Turn the regulator’s on/off knob clockwise to close it.
5. Set the zero reading according to the controller operator’s manual.
6. 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. Screw the regulator into the calibration gas cylinder. Make sure the regulator is off. It
is off when the on/off knob is turned all the way clockwise.
NOTE: Ensure that you are using an appropriate calibration cylinder for the channel you
are calibrating.
2. Follow the directions in the controller operator’s manual for setting the response
reading (span).
3. When the directions call for exposing the detector to gas, turn the regulator’s on/off
knob counterclockwise to open it. Gas will begin to flow.
4. Allow gas to flow for 2 minutes before continuing with the directions.
5. Turn the regulator’s on/off knob clockwise to close it.
6. Set the response reading according to the controller operator’s manual.
7. Unscrew the regulator from the cylinder.
20 • 65-2484RK-06 Multi Point Detector
Returning to Normal Operation
1. Unscrew the calibration cup from the detector.
NOTE: For convenience, leave regulator and calibration cup connected by the sample
tubing.
2. When the controller display reading falls below the alarm points, return the
controller to normal operation.
NOTE: If you do not allow the gas reading to decrease below the alarm points, then
unwanted alarms may occur.
3. Verify that the controller display reading decreases and stabilizes at:
• 0 %LEL for combustible gas
• 0 ppm for H
4. Store the components of the calibration kit in a safe and convenient place.
Calibration, O2 Detector
This section describes how to calibrate the oxygen detector on the multi-point detector. It
includes procedures to prepare for calibration, set the fresh air reading, set the zero
reading, and return to normal operation. It describes calibration using a calibration kit
that includes an 81-111 7RK calibration cup, calibration gas, sample tubing, and a fixed
flow regulator with an on/off knob. RKI Instruments, Inc. recommends using a 0.5 LPM
(liters per minute) fixed flow regulator. To properly calibrate the multi-point detector, you
must calibrate each connected detector. Perform the following procedure for the oxygen
detector.
W ARNING: The controller is not an active gas monitoring device during the calibration
procedure.
Prepari ng for Ca libration
WARNING: Do not remove the junction box cover or detector housing cap while the
circuits are energized unless the area is determined to be non-hazardous.
Keep the junction box cover and detector housing cap tightly closed during
operation.
S
2
1. Screw the calibration cup onto the bottom of the oxygen detector.
2. Screw the regulator into the zero air calibration cylinder. Make sure the regulator is
off. It is off when the on/off knob is turned all the way clockwise.
NOTE: If you can verify that the multi-point detector is in a fresh air environment, you
do not need to apply zero air to the detector before adjusting the fresh air
reading.
3. Use the calibration kit sample tubing to connect the fixed flow regulator to the
65-2484RK-06 Mul ti Po in t De te c to r • 2 1
calibration cup.
4. Put the controller into its calibration program. See the controller operator’s manual
for instructions to enter the calibration program.
NOTE: RKI controllers have a peak hold feature for fresh air adjustment and a minimum
hold feature for zero adjustment. Because of this, the instructions call for turning
off the gas to a detector before making adjustments.
Setting the Fresh Air Reading
1. Follow the directions in the controller operator’s manual for setting the fresh air
reading.
2. When the instructions call for applying z e ro air to the detector, turn the regulator’s
on/off knob counterclockwise to open it. Gas will begin to flow.
3. Allow the gas to flow for two minutes.
4. Turn the regulator’s on/off knob clockwise to close it.
5. Set the fresh air reading according to the controller operator’s manual.
6. Unscrew the regulator from the zero air calibration cylinder. Leave the sample tubing
connected to the regulator and the calibration cup.
Setting the Zero Reading
1. Screw the regulator into the 100% nitrogen calibration gas cylinder. Make sure the
regulator is off. It is off when the on/off knob is turned all the way clockwise.
2. Follow the directions in the controller operator’s manual for setting the zero reading.
3. When the directions call for exposing the detector to gas, turn the regulator’s on/off
knob counterclockwise to open it. Gas will begin to flow.
4. Allow gas to flow for 2 minutes before continuing with the directions.
5. Turn the regulator’s on/off knob clockwise to close it.
6. Set the zero reading according to the controller operator’s manual.
7. Unscrew the regulator from the cylinder.
Returning to Normal Operation
1. Unscrew the calibration cup from the oxygen detector.
NOTE: For convenience, leave regulator and calibration cup connected by the sample
tubing.
2. When the controller display reading rises above the alarm points, return the
controller to normal operation.
NOTE: If you do not allow the gas reading to rise above the alarm points, then unwanted
alarms may occur.
3. Verify that the controller display reading increases and stabilizes at 20. 9% oxygen.
4. Store the components of the calibration kit in a safe and convenient place.
22 • 65-2484RK-06 Multi Point Detector
Calibration, SO2 Detector
This section describes how to calibrate the toxic detector. It includes procedur es to prepar e
for calibrat ion, set the fresh air re ading, set the response reading, and return to norma l
operation. It describes calibration using a calibration kit that includes an 81-1138RK
calibration cup, calibration gas, sample tubing, and a fixed flow regulator with an on/o ff
knob.
WARNING: Not using the recommended 81-1138RK calibration cup, 0.5 LPM samp le
flowrate, and specified flow direction will result in an inaccurate
calibration of the SO
the calibration cup port that results in the specified flow direction for the
81-1138RK calibration cup.
Prepari ng for Ca libration
1. Unscrew the splashguard from the detector housing cap. Make sure the cap remains
securely screwed onto the housing body.
2. Push the calibration cup onto the plug-in sensor that sticks through the housing cap.
The calibration cup seals to the sensor with an O-ring.
channel. Make sure to connect the sample tubing to
2
3. Screw the regulator into the zero air calibration cylinder.
4. Use the sample tubing to connect the regulator to the calibration cup. Make su re to
connect the tubing to the inlet side of the calibration cup if using the 81-1138RK
calibration cup which is marked on the outside bottom to show the required flow
dire ction t hrough the cup.
NOTE If you can verify that the toxi c detector is in a fresh air environment, you do not
need to apply zero air to the detector before adjusting the fresh air reading.
5. Put the controller into its calibration program. See the controller operator’s manual
for instructions to enter the calibration program.
Setting the Zero Reading
1. Follow the instructions in the controller operator’s manual for setting the zero
reading.
2. When the instructions call for applying z e ro air to the detector, turn the regulator’s
on/off knob counterclockwise to open it. Gas will begin to flow.
3. Allow the gas to flow for two minutes.
4. Set the fresh air reading according to the controller operator’s manual.
5. Turn the regulator’s on/off knob clockwise to close it.
6. Unscrew the regulator from the zero air calibration cylinder. Leave the sample tubing
connected to the regulator and the calibration cup.
NOTE: Depending on the size of your zero air cylinder, it is possible that you will have a
different regulator for the zero air cylinder and toxic gas cylinder. If necessary to
fit the calibration toxic gas cylinder, change the regulator.
65-2484RK-06 Mul ti Po in t De te c to r • 2 3
Setting the Response Reading
1. Screw the regulator into the calibration gas cylinder.
2. Follow the directions in the controller operator’s manual for setting the response
(span) reading.
3. When the directions call for exposing the detector to gas, turn the regulator’s on/off
knob counterclockwise to open it. Gas will begin to flow.
4. Allow the gas to flow to the detector for 2 minutes.
5. Set the response reading according to the controller operator’s manual.
6. After setting the response reading, turn the regulator’s on/off knob clockwise to turn
it off.
Returning to Normal Operation
1. Unscrew the regulator from the cylinder and gently pull the calibration cup off of the
plug-in sensor.
NOTE: For convenience, leave the regulator and calibration cup connected by the
sample tubing.
2. Allow about 45 seconds for the gas reading to decrease below the alarm points and
then return the controller to normal operation.
NOTE: If you do not allow the gas reading to decrease below the alarm points, then
unwanted alarms may occur.
3. Verify that the controller display reading decreases and stabilizes at 0 ppm.
4. Store the components of the calibration kit in a safe and convenient place.
24 • 65-2484RK-06 Multi Point Detector
Parts List
Table 5 lists replacement parts and accessories for the multi-point detector.
Table 3: Parts List
Part Number Description
06-1248RK-03 Calibration kit sample tubing, 3 ft. length
07-0033RK Detector housing cap gasket (for H
S and O2 detectors)
2
61-0140RK Catalytic LEL replacement detector
65-1025RK Oxygen replacement plug -i n sen sor
65-2300RK-SO2 Replaceme nt detect or assem bly, SO
65-2423RK-05 H
S replacement detector assembly (includes sensor)
2
65-2484RK-06 Multi-point detector assembly, LEL/O
(includes plug-in sensor)
2
S/SO
2/H2
2
65-2514RK Oxygen replacement detector assembly (includes sensor)
71-0233RK 65-2484RK-06 Multi Point Detector Operator’s Manual (this document)
81-0004RK Calibration cylinder, 50% LEL propane in air, 17 liter steel
81-0004RK-01 Calibration cylinder, 50% LEL propane in air, 34 liter steel
81-0004RK-03 Calibration cylinder, 50% LEL propane in air, 103 liter steel
81-0007RK Calibration cylinder, 15% LEL hexane in air, 34 liter steel
81-0007RK-01 Calibration cylinder, 15% LEL hexane in air, 103 liter steel
81-0012RK Calibration cylinder, 50% LEL methane in air, 17 liter steel
81-0012RK-01 Calibration cylinder, 50% LEL methane in air, 34 liter steel
81-0012RK-03 Calibration cylinder, 50% LEL methane in air, 103 liter steel
81-0018RK Calibration cylinder, 50% LEL isobutane in air, 17 liter steel
81-0018RK-01 Calibration cylinder, 50% LEL isobutane in air, 34 liter steel
81-0018RK-03 Calibration cylinder, 50% LEL isobutane in air, 103 liter steel
81-0076RK Zero air calibration cylinder, 17 liter steel
81-0076RK-01 Zero air calibration cylinder, 34 liter steel
81-0076RK-03 Zero air calibration cylinder, 103 liter steel
81-0078RK-01 Calibration cylinder, 100% nitrogen, 34 liter
81-0078RK-03 Calibration cylinder, 100% nitrogen, 103 liter
81-0090RK Calibration cylinder, 3-gas mix (CH
81-0090RK-01 Calibration cylinder, 3-gas mix (CH
/ CO/ O2), 17 liter steel
4
/ CO/ O2), 34 liter steel
4
65-2484RK-06 Mul ti Po in t De te c to r • 2 5
Table 3: Parts List
Part Number Description
81-0090RK-03 Calibration cylinder, 3-gas mix (CH4/ CO/ O2), 103 liter steel
81-0151RK-02 Calibration cylinder, 25 ppm H
81-0151RK-04 Calibration cylinder 25 ppm H
81-0160RK-02 Calibration cylinder, 4-gas mix (CH
81-0160RK-04 Calibration cylinder, 4-gas mix (CH
81-0170RK-02 Calibration cylinder, 5 ppm SO
81-0170RK-04 Calibration cylinder, 5 ppm SO
S in nitrogen, 58 liter aluminum
2
S in nitrogen, 34 liter aluminum
2
/ O2/ CO/ H2S), 58 liter steel
4
/ O2/ CO/ H2S), 34 liter steel
4
in nitrogen, 58 liter aluminum
2
in nitrogen, 34 liter aluminum
2
81-1050RK Regulator with gaug e and knob, 0.5 LPM, fo r 17 liter an d 34 l iter st eel cali bratio n
cylinders
81-1051RK Regulator with gauge and knob, 0.5 LPM , for 34AL/58/103 liter calibration
cylinders
81-1117RK Calibration cup for catalytic LEL, H
81-1138RK Calibration cup, general (SO
ES-1537-H2S H
ESM-01DH-D-
S replacement plug-in sensor
2
ESM-01 plug-in sensor, 0 - 6.00 ppm sulphur dioxide, diffusion type only
), for ESM-01, use 0.5 LPM flow
2
S, and O2 detectors
2
SO2
26 • 65-2484RK-06 Multi Point Detector
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