RKI Instruments 65-2451RK-05 User Manual

65-2451RK-05

Part Number: 71-0182RK
Revision: P2
Released: 6/21/10

Hydrogen 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 transmitter regularly! Frequency of calibration
depends upon the type of use you have and the sensor types. Typ­ical calibration frequencies for most applications are between 1
and 3 months, but can be required mor e often or less often based
on your usage.

65-2451RK-05 Hydrogen 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.

65-2451RK-05 Hydrogen Trans mitter

Table of Contents

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

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

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

Hydrogen Detector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

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

Junction Box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

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

Mounting the Hydrogen Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Wiring the Hydrogen Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

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

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

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

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

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

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Replacing Components of the Hydrogen Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Calibration Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

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

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

Setting the Zero Reading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

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

Returning to Normal Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

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

65-2451RK-05 Hydrogen Transmitter

Overview

!

This manual describe s the 65-2451RK- 05 hydro gen transmit ter . This manual al so 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 th e hydrogen transmitter.

Specifications

WARN ING: Do not use this product in a manner not specified in th i s manual.

Table 1 lists specification s for th e hydrogen transmitter.

Target Gas Hydrogen

Area Classification Explosionproof for Class I, Groups B, C, and D

Table 1:Specifications

Description Specification

Sampling Method Diffusion
Signal Output 4 to 20 mA
Detection Range 0 to 100% LEL
Response Time 90% in 45 seconds
Operating Temperature

NOTE: The following symbol on the detector label is a caution to the user to refer to this

documentation for installati on instructions:

WARNING: When using the 65-2451RK-05, you must follow the instructions and

warnings in this manual to assure proper and safe opera tion of the
65-2451RK-05 and to minimize the risk of personal injury. Be sure to
maintain and periodically calibrate the 65-2451RK-05 as described in this
manual.

-40°F to 167°F (-40°C to 75°C)

65-2451RK-05 Hydrogen Transmitter • 1

Description

)

F

This section describes the components of the hydrogen transmitter. The transmitter is a 4 ­20 mA type detector head. It consists of the hydrogen detector, amplifier, and junction
box.

Factory Adjust Pot

Zero Pot

actory Adjust Pot

Jumper Pins

Factory Use Only

+ Test Point

- Test Point

Reducing Bushing,

3/4 NPT to 1/2 NPT

Span Pot

Controller T erminal Strip

Amplifier (Transmitter

SPAN

ZERO

Sensor

Curre nt

m A

S

PWR / SIGLEL

B

S2 001

57-1053RK

W
R G

Detector Terminal Strip

J-Box

Hydrogen LEL Detector

Figure 1: Hydrogen Transmitter Component Location

Hydrogen Detector

The hydrogen 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 NP T nipple with a sinter ed
metal flame arrestor on one end allowing ambient air to diffuse into the detector. The
flame arrestor also con tains any spark s which may occur within the detect or. The detector
has a built in molecular sieve that only allows hydrogen to diffuse into the detector. The
1/2 inch NPT mounting threads at the top of the detector allow you to mount it into the
bottom conduit hub of the junction box. A flame arrestor guard is located at the bottom of
the detector and is permanently bonded to the detector housing. The flame arrestor guard
protects the flame arrestor from impact damage. Four color-coded leads extend from the
top of the detector. The leads allow you to connect the detector to the amplifier.

2 • 65-2451RK-05 Hydrogen Transmitter