RKI Instruments 65-2399RK-CH4 User Manual
65-2399RK-CH4
Part Number: 71-0201RK
Revision: A
Released: 4/12/11
Methane Transmitter
Operator’s Manual
RKI Instruments, Inc.
www.rkiinstruments.com
WARNING
Read and understand this instruction manual before
operating transmitter. Improper use of the transmitter could
result in bodily harm or death.
Periodic calibration and maintenance of the transmitter is
essential for proper operation and correct readings. Please
calibrate and maintain this tra nsmitt er regula rly! Frequency
of calibration depends upon the type of use you have and
the sensor types. Typical calibration frequencies for most
applications are between 6 and 12 months, but can be
required more often or less often based on your usage.
65-2399RK-CH4 Combustible Gas Transmitter
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 RK I 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 not assume i ndemnification for a n y a c c ident or damage cause d b y the operation of
this gas monitor, and our warranty is limited to the replacement of parts or our complete
goods.
65-2399RK-CH4 Combustible Gas Trans mitte r
Table of Contents
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Methane Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Junction Box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Mounting the Methane Transmitter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Wiring the Methane Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Startup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Introducing Incoming Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Setting the Zero Signal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Replacing Components of the Methane Transmitter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Calibration Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Preparing for Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Setting the Zero Reading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Setting the Response Reading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Returning to Normal Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
65-2399RK-CH4 Combustible Gas Transmitter
Overview
This manual describes the 65-2399RK-CH4 methane transmitter. This manual also
describes how to install, start up, con fi gure, mainta in, a nd ca librate the transmitter 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 methane transmitter.
Specifications
Table 1 lists specifications for the methane transmitter.
Table 1:Specifications
Description Specification
Target Gas Methane (CH
Sampling Method Diffusion
Signal Output 4 to 20 mA
Detection Range 0 to 100% Volume
Response Time 90% in 45 seconds
Operating Temperature
Accuracy ± 5% of reading or ± 2% of full scale (whichever is gr eater)
-4°F to 122°F (-20°C to 50°C)
)
4
WARN IN G: When using the 65-2399RK-CH4, you must follow the instructions and
warnings in this manual to assure proper and safe opera tion of the
65-2399RK-CH4 and to mini mize the risk of personal injury. Be sure to
maintain and periodically calibrate the 65-2399RK-CH4 as described in
this manual.
65-2399RK-CH4 Combus tible Ga s Tr a nsm itter • 1
Description
l
The 65-2399RK-CH4 transmitter is calibrated to methane. The transmitter utilizes an
infrared type of detector which has some advantages over a catalytic type of combustible
detector. The infrared de tector will generally have a longer service life than a catalytic
detector, it will req uire calibration less often, and it can detect methane even if there is no
oxygen in the sample which allows d etection of methane in an inert atmosphere.
This section describes the components of the methane transmitter. The transmitter is a 4 20 mA type detector head. It consists of the methane detector, amplifier, and junction box.
Factory Adjust Pot
Jumper Pins,
Factory Use Only
100mV-500mV
Range
Factory Adjust Pot
Span Pot
Zero Pot
+ Test Point (Red)
- Test Point (Black)
Controller Terminal Strip
Amplifier
SPAN
ZERO
Sensor
Current
mA
S
PWR / SIG
BWR
G
LEL
Detector Termina
Strip
J-Box
IR CH4%Vol ume
Detector
Figure 1: Methane Transmitter Component Location
2 • 65-2399RK-CH4 Combustible Gas Transmitter
Infrared CH4 %Volume Detector
The infrared CH4 %Vol. detector consists of the detector housing body, detector housing
cap, cap gasket, and the plug-in sensor.
Detector Housing Body
Cap Gask et
Plug-In IR CH4
%Volume Sensor
Detector Housing Cap
Hydrophobic
Membrane
Figure 2: Infrared CH4 %Vol. 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 housing to screw the IR CH
NPT hub on the bottom of the junction box. Four color coded leads, red, white, green, and
black, extend from the other end of the detector. The leads allow you to connect the
detector to the amplifier.
The housing includes three sockets installed on a circuit board. These sockets accept the
plug-in sensor’s three pins to provide an electrical connection for the sensor. The circuit
board with the sockets conditions the sensor’s signal before the signal reaches the
amplifier.
Housing Cap & Cap Gasket
The housing cap screws onto the detector housing body. It retains the plug-in sensor a nd
protects it from damage. A foam gasket is installed inside the ho using cap that seals
against the sensor face. A hydrophobic membrane on the outside of the cap face keeps
water and particulates away from the sensor face behind the cap. Unscrew the detector
cap to access the plug-in sensor for maintenance or replacement. A cap gasket seals the
interface between the housing body and cap.
Plug-In CH
The plug-in se ns or is secured in the de t ect or assembly by the housing cap. The sensor produces a millivolt output that corresponds to the detection range of the trans mitter.
Sensor
4
detector into the 3/4”
4
65-2399RK-CH4 Combus tible Ga s Tr a nsm itter • 3
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