RKI Instruments 65-2391RK User Manual

65-2391RK

CO2 Transmitter

Operator’s Manual

Part Number: 71-0121RK
Revision: B
Released: 7/18/14

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.

65-2391RK CO2 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 any accident or dama g e c au s e d by the operation of
this gas monitor, and our warranty is limited to the replacement of parts or our complete
goods.

65-2391RK CO2 Transmitter

Table of Contents

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

IR CO2 Detector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Junction Box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Mounting the CO2 Transmitter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Wiring the CO

Startup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2

Introducing Incoming Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Setting the Zero Signal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Replacing Components of the CO

Transmitter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2

Calibration Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Preparing for Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Setting the Zero Reading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Setting the Response Reading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Returning to Normal Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

65-2391RK CO2 Transmitter

Overview

This manual describes t he 65 -23 91R K CO2 transmitter. This manual also des c ribes ho w t o
install, start up, configure, maintain, and calibrate 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 CO

Specifications

Table 1 lists specifications for the CO2 transmitter.

transmitter.

2

Table 1:Specifications

Target/Calibration Gas Carbon Dioxide (CO

Area Classification Explosionproof for Cl ass I, Groups B, C, and D
Sampling Method Diffusion
Signal Output 4 to 20 mA
Detection Range 65-2391RK-02: 0 - 5,000 ppm

65-2391RK-03: 0 - 5% Volume
65-2391RK-05: 0 - 50% Volume

65-2391RK-10: 0 - 100% Volume
Response Time 90% in 45 seconds
Accuracy ± 5% of reading or ± 2% of full scale (whichever is gr eater)

)

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W ARNING: When using the 65-2391RK, you must follow the instructions and warnings

in this manual to assure proper and safe operation of the 65-2391RK and to
minimize the risk of personal injury. Be sure to maintain and period ically
calibrate the 65-2391RK as described in t hi s manual.

65-2391RK CO2 Transmitter • 1

Description

t

ip

S

This section describes the components of the CO2 transmitter. The transmitter is a 4 - 20
mA type detector head. It consists of the infrared CO

detector, amplifier, and junction

2

box.

Amplifier

Potentiometer

(factory set)

ecuring screw (2)

Test point (+)

Potentiometer

(factory set)

Test point (-)

GND

24V

TP+

4-20

RED

WHT
GRN

SENSOR POWER/SIG

BLK

TP-

Interconnec
terminal str

Jumper pins

(factory use only)

Span potentiometer

Zero potentiometer

IR CO Detector

2

Figure 1: CO2 Transmitter Component Location

Infrared CO2 Detector

The infrared CO2 detector is made up of a miniature infrared CO2 detector housed and
encapsulated in a pipe nipple. The pipe nipple has 3/4 inch NPT threads on each end and

a 1 1/4 inch hex that allows removal or installation of the detector with a wrench. A
porous flame arrestor that is coated with a hydrophobic film tha t repels liquids is on one
end of the detector and allows sample gas to enter the detector. 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.

To distinguish the different ranges of CO
shrink tubing is applied to the wiring where it comes out of the nipple. The following
table indicates the color of the shrink tubing and the color of the wire to which it is
applied.

detectors from one another, a short length of

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2 • 65-2391RK CO2 Transmitter