RKI Instruments 65-2515RK User manual

65-2515RK

Oxygen Detector

Operator’s Manual

Part Number: 71-0137RK

Revision: B

Released: 10/1/20

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2 • 65-2515RK Oxygen Detector

WARNING

Read and understand this instruction manual before operating detec-

tor. Improper use of the detector 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. Typical calibration frequen-

cies for most applications are between 3 and 6 months, but can be

required more often or less often based on your usage.

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65-2515RK Oxygen Detector • 3

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 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. 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:

Warranty 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, 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 APARTICULAR 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 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.

a) Absorbent cartridges d) Batteries

b) Pump diaphragms and valves e) Filter elements

c) Fuses

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4 • 65-2515RK Oxygen Detector

Table of Contents

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Oxygen Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Junction Box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Mounting the Oxygen Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Wiring the Oxygen Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Introducing Incoming Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Verifying/Setting the Fresh Air Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Preventive Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Replacing the Oxygen Plug-in Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Replacing the Oxygen Detector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Calibration Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

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

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

Setting the FreshAir Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

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

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

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

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65-2515RK Oxygen Detector • 5

Overview

This manual describes the 65-2515RK oxygen detector (internal amplifier type). This manual

also describes how to install, start up, maintain, and calibrate the detector when used with a

gas monitoring controller. A parts list at the end of this manual lists replacement parts and

accessories for the oxygen detector.

Specifications

Table 1 lists specifications for the 65-2515RK oxygen detector.

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 65-2515RK, you must follow the instructions and warnings in

this manual to assure proper and safe operation of the 65-2515RK and to

minimize the risk of personal injury. Be sure to maintain and periodically

calibrate the 65-2515RK as described in this manual.

Table 1: 65-2515RK Specifications

Target Gas Oxygen

Sampling Method Diffusion

Detection Range 0 - 25.0% oxygen

Accuracy ± 0.5% O2

Oxygen Detector Signal Output 0 mV at 0% volume oxygen nominal

18 mV at 25% oxygen nominal

Response Time 90% in 30 seconds

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

Temperature Code T6

Installation Category Installation Category 1. Signal level, special equipment or

parts of equipment, telecommunication, electronic, etc.,

with smaller transient overvoltages than Installation

Category (Overvoltage Category) II (ref. IEC 664).

Operating Temperature -20° C to 45° C

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6 • 65-2515RK Oxygen Detector

Description

This section describes the components of the 65-2515RK. It consists of the oxygen detector

and the junction box

Oxygen Detector

The oxygen detector consists of the detector housing and the plug-in sensor.

Figure 1: Oxygen Detector Component Location

Detector Housing

The detector housing protects the sensing components within the housing. Use the mounting

threads at the top of the housing to screw the oxygen detector into the bottom conduit hub of

the junction box. 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 that may occur within the detector housing. A cap

gasket seals the interface between the housing body and cap. The flame arrestor guard protects

the flame arrestor from impact damage and is permanently bonded to the cap.

Two color coded wires extend from the top of the detector housing. Use these wires to connect

the oxygen detector to a controller via the terminal block in the junction box. The detector

housing includes two sockets installed on a circuit board. These sockets accept the plug-in

sensor’s two pins to secure the sensor within the detector housing. The circuit board with the

sockets conditions the sensor’s signal before it exits the detector housing via the two color

coded wires.

Plug-In Sensor

The plug-in sensor plugs into a circuit board in the detector housing with two pins and is

retained by the cap. Through a series of chemical and electrical reactions, the sensor produces

an electrical output that is proportional to the detection range of the oxygen detector.

Detector

Housing Body

Cap Gasket

Detector Housing

Cap

Flame Arrestor

Guard

Oxygen Sensor

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65-2515RK Oxygen Detector • 7

Junction Box

The junction box allows you to install the oxygen detector at a mounting site that is remote

from a controller and it protects the detector wiring connections. Two conduit hubs allow you

to mount the oxygen detector to the junction box and route the wiring from the detector to a

controller. Three spacers installed on the back of the junction box control the distance of the

junction box from a mounting surface and ensure that there is enough room to install a

calibration cup on the detector during calibration.

A terminal block within the junction box facilitates the wiring process. A cover on the front

of the junction box allows access to the interior of the junction box.

Installation

This section describes procedures to mount the oxygen detector in the monitoring

environment and wire the detector to a controller.

Mounting the Oxygen 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. Make sure

there is sufficient room to perform start-up, maintenance, and calibration procedures.

• Select a site that is at normal breathing level.

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8 • 65-2515RK Oxygen Detector

Figure 2: 65-2515RK Outline & Mounting Dimensions

NOTE:The oxygen detector in the 65-2515RK is normally provided with an Adalet

XIHSCFC3 junction box rated explosion proof for Class I, Groups B, C, and D. This

combination is shown in Figure 2 above. Any junction box with an internal volume

less than or equal to 69 cubic inches and rated explosion proof for Class I, Groups B,

C, and D may be used for this detector.

2. At the mounting site you select, hang or mount the junction box with the detector facing

down (see Figure 2).

Rubber Spacers,3X

.38

.75

3.2 Max

3/4 NPT Conduit

Hub

1 1/2-20 Thread for

Calibration Cup

3.62

8.45 Max

2.7

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65-2515RK Oxygen Detector • 9

Wiring the Oxygen Detector to a Controller

WARNING: If the controller’s construction is not explosion-proof, the controller must be

installed in an ordinary location. Do non install a non-explosion-proof

controller in a classified location. Turn off the controller.

3. Turn off or unplug power to the controller.

4. Remove the junction box cover.

5. Guide a two-conductor, shielded cable or two wires in conduit through the unused conduit

hub of the junction box.

WARNING: To maintain the explosion proof classification of the oxygen detector/junction

box combination, a conduit seal must be used within 18 inches of the detector

junction box conduit hub used for wiring to the amplifier. Do not install the

detector in an environment with acetic acid. Adhere to your local electrical

code when installing the conduit seal.

6. Connect the wires to the terminals opposite the detector leads using the terminal strip in

the junction box.

CAUTION: If using shielded cable, leave the drain wire insulated and disconnected at the

detector. You will connect the opposite end of the cable’s drain wire at the

controller.

7. Reinstall the junction box cover to the junction box.

8. Route the cable or wires leading from the oxygen detector through one of the conduit hubs

at the controller housing.

CAUTION: Do not route power and detector wiring through the same conduit hub. The

power cable may disrupt the transmission of the detector signal to the controller.

9. Connect the wires to the applicable controller terminal strip as shown in Figure 3 below.

See the controller operator’s manual and the controller’s detector head specification sheet

for wiring information specific to a controller.

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10 • 65-2515RK Oxygen Detector

Figure 3: Wiring the Oxygen Detector to a Controller

10. If using shielded cable, connect the cable’s drain wire to an available chassis ground at the

controller. RKI controllers typically have a ground stud that is a convenient grounding

location.

Install conduit seal

within 18 inches (do

not install detector

in environment with

acetic acid)

Green (-)

Controller

Oxygen Detector

Terminals

Controller Housing

(installed inordinary location if

device is non-explosion-proof)

Oxygen Detector

Green

White

Terminal Strip

Cable

Shield

White(+)

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