RKI Instruments 65-2461RK User Manual

65-2461RK

PPM Hexane Transmitter

Operator’s Manual

Part Number: 71-0144RK

Revision: 0

Released: 2/16/11

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
6 and 12 months, but can be required more often or less often
based on your usage.

65-2461RK PPM Hexane 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* from the date of
shipment from RKI Instruments, Inc. Any parts found defective within that period will be
repaired or replaced, at our option, free of charge. Parts must be returned to RKI
Instruments, Inc. for repair or replacement. This warranty does not apply to those items
which by their nature are subject to deterioration or consumption in normal service, and
which must be cleaned, repaired or replaced on a routine basis. Examples of such items
are:

a) Pump diaphragms and valves c) Batteries
b) Fuses d) Filter elements

Warranty is voided by abuse including mechanical damage, alteration, rough handling, or
repair procedures not in accordance with instruction manual. This warranty indicates the
full extend of our liability, and we are not responsible for removal or replacement costs,
local repair costs, transportation costs, or contingent expenses incurred without our prior
approval.

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 only by authorized distributors,
dealers and representatives as appointed by RKI Instruments, Inc.

We do not assume indemnification for any accident or damage caused by the operation of
this gas monitor and our warranty is limited to the replacement of parts or our complete
goods. Warranty covers parts and labor performed at RKI Instruments, Inc. only, and does
not cover field labor or shipment of parts back to RKI.

65-2461RK PPM Hexane Transmitte r

Table of Contents

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

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

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

PPM Hexane Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

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

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

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

Mounting the PPM Hexane Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Wiring the PPM Hexane Transmitter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Startup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Introducing Incoming Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Transmitter Burn-In Period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

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

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

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

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

Replacing Components of the PPM Hexane Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Setting the Detector Load Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Calibration Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Calibration Kit Humidifier Tube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Preparing for Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Setting the Zero Reading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Setting the Response Reading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Returning to Normal Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

65-2461RK PPM Hexane Transmitter

Overview

This manual describes the 65-2461RK ppm hexane transmitter. This manual also describes
how to 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 transmitter.

Specifications

Table 1 lists specifications for the ppm hexane transmitter.

Description Specification

Target Gas Combustible Gas, Calibrated to Hexane
Detection Range 0-500 ppm Hexane
Area Classification Explosionproof for Class I, Groups B, C, and D
Sampling Method Diffusion

Table 1:Specifications

Signal Output 4 to 20 mA
Response Time 90% in 45 seconds

W ARNING: When using the 65-2461RK, you must follow the instructions and warnings

in this manual to assure proper and safe operation of the 65-2461RK and to
minimize the risk of personal injury. Be sure to maintain and period ically
calibrate the 65-2461RK as described in this manual.

65-2461RK PPM Hexane Tra nsm itter • 1

Description

Factory Adjust Pot

This section describes the ppm hexane transmitter’s componen ts. It is a 4 to 20 mA type
detector head. It consists of the ppm hexane detector, amplifier, and junction box.

SpanPot

Zero Pot

Load Voltage Pot

Factory Use

Jumper Strip

Factory Adjust Pot

- Test Point, Black
Gas Select Jumper,

In HydrogenPosition

+ Test Point, Red

Factory Use JumperStri p

ZERO

SPAN

1-2 Hex

134

2

Controller Terminal Strip

Detector Terminal Strip

MountingScrew
w/ flat and lock washer

S

WBR

3-4 H2Gas Select

DETECTOR PWR / SIG

Amplifier

J-Box

Reducing Bushing,

3/4 NPT to 1/2 NPT

Figure 1: PPM Hexane Transmitter Component Location

PPM Hexane Detector

The ppm hexane detector is a MOS type (metal oxide semiconductor) detector packaged
in a 1/2 inch NPT nipple with a sint er ed metal flame arrestor on one end allowing
ambient air to diffuse into the detector . The flame arrestor also contains any sparks which
may occur within the detector. The 1/2 inch NPT mounting threads at the top of the
detector allow you to mount it into the bottom co nduit hub of the junction box. A
rainshield screws onto the bottom of the detector (flame arrestor end). The rainshiel d
helps protect the detector from rain and debris in the monitoring environment. Three
color-coded leads extend from the top of the detector. The leads a llow you to connect the
detector to the amplifier. The output of the detector is non-linear and is linearized by the

2 • 65-2461RK PPM Hexane Transmitter

HexaneDetec tor

amplifier (see below).

Amplifier

The amplifier converts the non-linear electrical output from the detector to a linear 4 to 20
mA signal that corresponds to the detection range and transmits the signal to a gas
monitoring controller. The amplifier includes the terminal strips, gas select jumper strip,
span pot, zero pot, load voltage pot, and test points (see Figure 1).

Controller Terminal Strip

The controller terminal strip is a three position plug-in style terminal strip located near the
top of the amplifier. Use the controller terminal strip to wire the transmitter to a controller .

Detector Terminal Strip

The detector terminal strip is a three position plug-in style terminal strip located below
the controller terminal strip. Use the detector terminal strip to connect the detector to the
amplifier.

NOTE: The detector is factory-wired to the detector terminal strip. See “Wiring the PPM

Hexane Transmitter” on pa ge 5 for all wiring procedures related to the
transmitter.

Gas Select Jumper Strip

The gas select jumper strip is a three position pin style terminal strip located in the lower
left corner of the amplifier. A label next to the jumper strip indicates which pins must be
shorted to select hexane or hydrogen. A jumper block is installed at the factory over pins 1
& 2 to select hexane as the gas type. The gas type defines the linearizing curve used by the
amplifier to linearize the detector output.

Zero Pot

The zero pot is located in the upper left corner of the amplifier (see Figure 1). Use a small
flat blade screwdriver to turn the zero pot’s adjustment screw and adjust the amplifier’s
zero (fresh air) output during the start-up and calibration procedures.

Span Pot

The span pot is located to the right of the zero pot (see Figure 1). Use a small flat blade
screwdriver to turn the span pot’s adjustment screw and adjust the amplifier’s gas
response output during the calibration procedure.

Load Voltage Pot

The load voltage pot is located below the zero and span pots (see Figure 1). The load
voltage pot is not needed for normal scheduled maintenance, so it is a right angle pot that
is not accessible unless the amplifier is lifted out of the junction box enough to access the
adjustment s crew. Us e a small flat blade screwdrive r to turn the load voltage pot’s
adjustment screw and adjust the amplifier’s detector load voltage when the detector or
amplifier is replaced.

CAUTION: The amplifier includes additional pots. They are factory-set. Do not adjust the m.

65-2461RK PPM Hexane Tra nsm itter • 3