RKI Instruments 65-2301RK User Manual

65-2300RK/65-2301RK

Toxic Detector

Operator’s Manual

Part Number: 71-0146RK

Revision: C

Released: 2/15/13

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

65-2300RK/65-2301RK Toxic Detect or

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 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 no t as su me indemnif ic a t ion for any accident or d amage caused b y t he op e r a t ion of
this gas monitor, and our warranty is limited to the replacement of parts or our complete
goods.

65-2300RK/65-2301RK Toxic Detector

Table of Contents

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

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

Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

65-2300RK Toxic Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

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

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

Mounting the Toxic Detector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Wiring the Toxic Detector to a Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

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

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

Setting the Zero (Fresh Air) Signal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

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

Replacing Components of the Toxic Detector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Calibration Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Preparing for Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Setting the Zero (Fresh Air) Reading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Setting the Response Reading (Span) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

65-2300RK/65-2301RK Toxic Detect or

Overview

This manual describes the 65-2301RK toxic detector. This manual also describes how to
install, start up, maintain, and calibrate the toxic detector when used with a gas
monitoring controller. A parts list at the end of this manual lists replacement parts and
accessories for the toxic detector.

The 65-2301RK toxic detector includes the 65-2300RK toxic detector and a junction box.
This manual may also be used for the 65-2300RK toxic detector which does not include a
junction box and is normally mounted in one of a controller’s conduit hubs. If yo u are
using a 65-2300RK toxic detector, disregard all references to the junction box and junction
box terminal strip.

The 65-2300RK and 65-2301RK detectors can be used for various target gases which are
listed in Table 1 below. For a particular target gas, the part number of the toxic detector
will be of the format 65- 230 0RK -X XX or 65 -23 01 RK-XXX. For example, 65-2301 RK -N H3 is
for ammonia ( NH

Specifications

) detection.

3

WARNING: Do not use this product in a manner not specified in thi s instruction

manual.

Table 1 lists specifications for the various 65-2300RK/65-2301RK toxic detectors.

Table 1: Specifications

Target Gas 65-2300RK-ASH3/65-23 01R K-ASH3: Arsine (AsH

65-2300RK-CL2/65-2301RK-CL2: Chlorine (Cl

)

2

65-2300RK-CL-10/65-2301RK -CL-10: Chlorine (Cl
65-2300RK-HCN/65-2301RK-HCN: Hydrogen Cyanide (HCN)

65-2300RK-NH3/65-2301RK-NH3: Ammonia (NH
65-2300RK-SO2/65-2301RK-SO2: Sulphur Dioxide (SO
65-2300RK-PH3/65-2301RK-PH3: Phosphine (PH

Sampling Method Diffusion
Detection Range AsH

: 0 - 1.50 ppm

3

: 0 - 3.00 ppm

Cl

2

Cl

: 0 - 10.0 ppm

2

HCN: 0 - 15.0 ppm

: 0 - 75.0 ppm

NH

3

: 0 - 6.00 ppm

SO

2

: 0 - 1.00 ppm

PH

3

)

3

)

2

)

3

)

2

)

3

Accuracy ± 10% of reading or ± 5% of full scale (whichever is greater)
Response Time • Cl

and NH3: T90 in 90 seconds

2

• All others: T90 in 45 seconds

65-2300RK/65-2301RK Toxic Det ec t or • 1

Table 1: Specifications

Operating Temperature &
Humidity

WARNING: When using the 65-2300RK/65-2301RK, you must follow the instructions

• 14°F to 104°F (-10°C to 40°C)

• 20% to 90% Relative Humidity

and warnings in this manual to assure proper and safe operation of the
65-2300RK/65-2301RK and to minimize the risk of personal injury. Be sure
to maintain and periodically calibrate the 65-2300RK/65-2301RK as
described in this manual.

2 • 65-2300RK/65-2301RK Toxi c Detector

Description

Rubber Spacer, 3X

Toxic Detector

Junction Box

3/4 NPT Conduit Hub

Splas h Guard
(removable)

Sensor
(different for each detector type)

Detector Housing
Cap

Cap Gasket

De t ector Housing Body
(different for each detector type)

This section describes the components of the 65-2300RK and 65-2301RK. The 65-2301RK
includes the 65-2300RK toxic de tector and a junctio n box. The 65 -2300R K does not incl ude
a junction box. Figure 1 below shows the components of the 65-2301RK.

65-2300RK Toxic Detector

The 65-2300RK toxic detector consists of the detector housing body, detector housing cap,
splashguard, cap gasket, and the plug -in sensor.

Figure 1: 65-2301RK Component Location

Figure 2: 65-2300RK Toxic Detector Component Location

65-2300RK/65-2301RK Toxic Det ec t or • 3

Detector Housing Body

The detector housing body protects the electronic components within the housing. Use the
mounting threads at the top of the housi ng to screw the toxic detector into a 3/4” NPT
hub. Two wires extend from the top of the detector housing body. Use these wires to
connect the toxic detector to a controller. One of the wires is black and one of the wires is
color coded depending on the detector type. See Figure 4 on page 6 for the color code
assignments.

The housing body includes a 12 position connector at the bottom of the housing body. The
plug-in sensor mates to this connector. A pre-amplifier located between the connector and
the two interconnect wires conditions the sensor’s sign al before the signal reaches the
controller.

Housing Cap, Cap Gasket, & Splashguard

The housing cap screws onto the detector housing. It retains the sensor and protects it
from damage. A removable splashguard is screwed onto the detector cap to protect the
sensor from impact damage, direct water spray, and splashing. Unscrew the detector cap
to access the sensor for maintenance or replacement. A cap gasket seals the interface
between the housing and cap.

Plug-in Sensor

The plug-in sensor is secured in the detector assembly by the housing cap. There is a
different sensor for each target gas. Through a series of chemical and electrical reactions,
the sensor produces an electrical output that corresponds to the detection range of the
sensor.

Installation

Junction Box

The junction box allows you to install the toxic detector at a mounting site that is remote
from a controller and protects the dete ctor wiring connections. Two conduit hubs allow
you to mount the toxic detector to the junction box and connect 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 w iring connections. A cover on the front of the
junction box allows access to the interior of the junction box.

This section describes procedures to mount the toxic detector in the mo nitoring
environment and wire the detector to a controller.

Mounting the Toxic Detector

NOTE: If you are installing a 65-2300RK, it does not include a junction box and is usually

factory installed in one of a controller’s conduit hubs or may be field installed
using the 3/4” NPT threads on the end with the wir es. The 65-2301RK includes a
junction box as shown in Figure 3 below.

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. Ma ke sur e

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

4 • 65-2300RK/65-2301RK Toxi c Detector

procedures.

Rubber
Spacer, 3X

.75

2.70 0.38

Toxic
Detector

3.65

3/4 NPT
Conduit Hub

+

3/4" NPT

.75

7.30 .25

65-2300RK

Ø 1.50

9.60 Max

Junction

Box

65-2301RK

4.78

• Select a site where the target gas is likely to be found first.

NOTE: If your application does not require a specific mounting site, mount the detector

at approximately breathing level.

Figure 3: Outline & Mounting Dimensions, 65-2300RK & 65-2301RK

2. At the mounting site you select, hang or mount the junction box with the detector
facing down (see Figure 3).

CAUTION: Mount the toxic detector with the detector facing down (see Figure 3.)

Wiring the Toxic Detector to a Controller

WARNING: Always verify that power to the controller is OFF before you make wiring

connections.

1. Turn off the controller.

2. Turn off or unplug p ower to the controller.

3. If the detector is mounted remotely from a controller using the junction box, proceed
to step 4.

If the detector is mounted directly to a controller, connect the detector’s color coded

65-2300RK/65-2301RK Toxic Det ec t or • 5

and black wires to the appropriate controller detector terminals (see Figure 4 f or the

Shield ed C able

(+) See Table

AsH3 brown
CL2 yellow
CL-10 yellow
HCN white
NH3 red
PH3 green
SO2 blue

Gas Type Table

Controller DetectorTerminals,

Typical Designations

Controller Housing

+
S

Terminal S t rip

Black (S)

ESM-01 Detector

0 - 3 ppm Cl2
0- 10 ppm Cl2

Gas Type + W ir e

color coding of the non-black wire) and skip to the Startup Section.

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.

6. Connect the two wires to the detector using the terminal block.

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

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

7. Secure the junction box cover to the junction box.

8. Route the cable or wires leading from the toxic detector through one of the conduit
hubs at the controller housing. Use appropriate conduit fitt ings and construction
technique for the environmental rating of the controller. RKI controllers are typically
rated NEMA 4X.

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

cable may disru pt the transmission of the detect or signal to the controller.

9. Connect the wires to the applicable controller terminal strip. See the controller
operator’ s manual and the controller’s detector head specification sheet for the 65­2300RK or 65-2301RK detector.

6 • 65-2300RK/65-2301RK Toxi c Detector

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

Figure 4: Wiring the Toxic Detector to a Controller

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

Start Up

11. Reinstall the junction box cover.

This section describes p rocedur e s t o s t ar t up the toxic detector and place the detector into
normal operation.

Introducing Incoming Power

1. Complete the installation procedures described earlier in this manual.

2. Verify that the power wiring to the controller is correct and secure. Refer to the
controller operator’s manual.

3. Turn on or plug in the incoming power, then turn on the controller.

4. Verify that the controller is on and operating properly. Refer to the controller
operator’s ma nual.

CAUTION: Allow the detector to warm up for 5 minutes before you continue with the next

section, “Setting the Zero Reading”.

Setting the Zero (Fresh Air) Reading

CAUTION: If you suspect the presence of the target gas in the monitoring environment, use the

1. Verify that the detector is in a fresh air environment (environment known to be free of

2. Verify a reading of 0 p pm at the cont roller.

3. Perform a zero (fresh air) adjustment operation at the controller. See the controller

Maintenance

This section describes maintenance procedures. It includes preventive maintenance,
troubleshooting, and component replacement procedures.

Preventive Maintenance

This section describes a preventive maintenance schedule to ensure the optimum
performance of the toxic detector. It includes daily, monthly, and quarterly procedures.

Daily

calibration kit and a zero air calibration cylinder to introduce “fresh air” to the toxic
detector and verify an accurate zero setting. See “Calibration” on page 12 for
instructions to introduce zero air to the detector.

toxic and combustible gases, and of normal oxygen content, 20.9%).

If the display reading is 0 ppm, start up is complete. The toxic detector is in normal
operation. If the display reading is not 0 ppm, continue with step 3.

operator’s manual for instructions.

Verify a display reading of 0 ppm at the controller. Investigate significant changes in the
display reading.

Monthly

This procedure describes a test to verify that the toxic detector responds properly to the
target gas. It describes the test using a calibration kit that includes a calibration cup,

65-2300RK/65-2301RK Toxic Det ec t or • 7

calibration gas, sample tubing, and a fixed flow regulator with an on/off knob. See Table 2
on page 12 to determine the correct calibration cup and regulator for the required flowrate
for your detector.

WARNING: Failure to use the recommended calibration cup and calibration gas flow

rate will result in an inaccurate reading.

NOTE: Performing a response test on the toxic detector may cause alarms. Be sure to put

the controller into its calibration program or disable external alarms before
performing this test.

Preparing for the response test

1. Place the controller into its calibration program or disable external alarms.

2. Verify that the controller display reading for the channel you are testing is 0 ppm.
If the display reading is not 0 ppm, set the zero (fresh air) reading of the detector as

described in the Start Up section of this manual, then continue this procedure.

3. Unscrew the splashguard from the housing cap. Make su re the housing cap remains
screwed firmly onto the housing body.

4. Screw the regulator into the calibration cylinder.

5. Use the sample tubing to connect the regulator to the calibration cup. Check the
bottom of the calibration cup to see if it has a specified flow direction through the cup
and if it does, make sure you connect the tube from the regulator to the inlet port. The
81-1138RK calibration cup, which is used for all detectors except for Cl2 and NH3
detectors, has a specified flow direction on the bottom of the cup. The 81-1138RK-CL2
and 81-1138RK-NH3 calibration cu ps do not have a specified flo w direction.

6. Push the calibration cup onto the plug-in sensor that sticks through the housing cap
as far as it will go. The cup seals to the sensor with an O-ring. Make sure to use the
correct calibration cup and sample flowrate for your detector.

Performing the response test

1. Turn the regulator’s on/off knob counterclockwise to open the regulator. Gas will
begin to flow

2. Allow the gas to flow for two minutes, then verify that the reading is within ± 20% of
the cylinder gas concentration.

NOTE: If the reading is not within ± 20% of the correct response reading, calibrate the

detector as described in “Calibration” on page 12.

3. Turn the regulator’s on/off knob clockwise to close the regulator.

4. Unscrew the regulator from the calibration cylind er.

5. Gently pull the calibration cup off of the plug-in sensor.

6. Screw the splashguard firmly back onto the housing cap.

7. When the controller display reading falls below th e alarm setpoints, return the
controller to normal operation.

Quarterly

Calibrate t h e toxic detect or as described in “Calibration” on page 12.

8 • 65-2300RK/65-2301RK Toxi c Detector

Troubleshooting

The troubleshooting guide describes symptoms, probable causes, and recommended
action for problems you may encounter with the toxic detector.

NOTE: This troubleshooting guide describes detector problems only. See the controller

operator’s manual for problems you may encounte r with the controller.

Fail Condition

Symptoms

• The controller indicates a fail condition.

Probable causes

• The detector wiring is disconnected or misconnected.

• The plug-in sensor is not properly plugged into the socket in the detector housing
body.

• The detector’s zero reading is low enough to cause a fail condit ion.

• The detector is malfunctioning.

Recommended action

• Verify that the detector wiring is correct and secure.

• Confirm that the p lug-in sensor is installed properly.

• Perform a zero (fresh air) adjustment. A full calibration is recommended.

• If the fail condition continues, replace the plug-in sensor a s d e scribe d later in this
section.

• If the fail condition continues, contact RKI for further instruction.

Slow or No Response/Difficult or Unable to Calibrate

Symptoms

• The detector responds slowly or doe s not respond during the monthly response test.

• Unable to accurately set the zero or response reading during the calibration
procedure.

• The detector requires frequent calibration.

NOTE: Under “normal” circum stances, the detector requires calibration once every three

months. Some appli cations may require a more frequent calibration schedule.
See “Calibration Frequency” on page 11 for a discussion of the calibration
frequency.

Probable causes

• The calibration cylinder is low, out-dated, or defective.

• The incorrect calibration cup or regulator is being used.

• The plug-in sensor face is blocked with dirt or some other particulate contamination.

• The detector is malfunctioning.

65-2300RK/65-2301RK Toxic Det ec t or • 9

Recommended action

1. Ver if y that the cal i brat i on cylind er con tai ns an adequate supply of a fresh te st sa mpl e.

2. Confirm that you are using the correct calibration cup and regulator for your detector
type. See Table 2 on page 12 for a list of the required calibration cups and regulators.

3. Check the plug-in sensor face and remove any particulate contamination if necessary.

4. If the calibration/response difficulties continue, replace the plug-in sensor as
described later in this section.

5. If the calibration/response difficulties continue, contact RKI Instruments, Inc. for
further instruction.

Replacing Components of the Toxic Detector

This section includes a procedure to replace the plug-in toxic sensor and one to replace the
entire toxic detector assembly. In most cases, it is not necessary to replace the entire
detector assembly.

Replacing The Plug-in Toxic Sensor

CAUTION: The plug-in sensor contains electrolyte which is a dilute acid. Do not disassemble the

sensor when replacing it with a new one. If sensor electrolyte comes in contact with
your skin, wash affected area thoroughly with soap and water.

1. Turn off the controller.

2. Turn off or unplug p ower to the controller.

3. Unscrew the detector housing cap with the spla shguard from the detector housing
body. Make sure not to lose the cap gasket.

4. Unplug and remo ve the toxic sens or.

5. Carefully plug the replacement sensor into the connector that is located in the detector
housing body.

WARNING: You must replace the plug-in sensor with the same type of sensor that is

installed. A detector cannot be converted from one type of detector to
another by using a different plug-in sensor. For example, if you are
replacing a Cl2 sensor, you must replace it with a Cl2 sensor.

6. Make sure the cap gasket is in place and screw the detector housing cap with the
splashguard back onto the detector housing body.

7. Turn on power to the controller.

8. Turn on the controller.

CAUTION: Allow the r epla cement se nsor to wa rm up for 5 minutes before you continue with the

next step.

9. Calibrate the detector as described in “Calibration” on page 12.

10 • 65-2300RK/65-2301RK Tox ic Detector

Replacing the Toxic Detector

NOTE: In most cases, it is only necessary to replace the plug-in sensor.

1. Turn off the controller.

2. Turn off or unplug incoming power to the controller.

3. If the detector is installed directly on a controller, open the controller door.
If the detector is installed remotely from a controller in a junction box, remove the

junction box cove r.

4. If the detector is installed directly on a controller, disconnect the detector leads from
the detector terminal strip in the controller. Note the position of the color-coded leads
as you remove them.

If the detector is installed remotely from a controller in a junction box, disconnect the
detector leads from the terminal block in the junction box. Note the position of the
color-coded leads as you remove them.

5. Unscrew the detector from the controller conduit hub or junction box conduit hub.

6. Gu ide the detector leads of the replacement detector through the controller conduit
hub or junction box conduit hub, then screw the mounting threads of the detector into
the hub. If necessary for environmental conditions, apply thread sealant or teflon tape
to the hub and/or detector threads to seal them.

7. If the detector is installed directly on a controller, connect the detector leads to the
appropriate detector terminal strip terminals. See Figure 4 on page 6 for wiring to a
generic controller. See the controller operator’s manual and the controller’s detector
head specification sheet for the 65-230 0RK or 6 5-2301RK detector fo r wiring s pecific to
your controller.

If the detector is installed remotely from a controller in a junction box, connect the
detector leads to the terminal block the same way the old detector was wired (see
Figure 4 on page 6). See the controller operator’s manual and the controller’s detector
head specification sheet for the 65-2300RK or 65-2301RK to verify the connections to
the controller are correct.

8. If the detector is installed remotely from a controller in a junction box, reinstall the
junction box cove r.

9. Turn on or plug in power to the controller.

10. Turn on the controller.

CAUTION: Allow the replacement detector to warm up for 5 minutes before y o u c o ntinue with

the next step.

11. Calibrate the replacement detector as described in “Calibration” on page 12.

Calibration Frequency

Although there is no particular calibration frequency that is correct for all applications, a
calibration frequency of every 3 months is adequate for most toxic detector applications.
Unless experience in a particular application dictates otherwise, RKI Instruments, Inc.
recommends a calibration frequency of every 3 months for the toxic detector.

65-2300RK/65-2301RK Toxic Det ec t or • 11

Calibration

If an application is not very demanding, for example detection in a clean, temperature
controlled environment where toxic gas is not normally present, and calibration
adjustments are minimal at calibration, then a calibration frequency of every 6 months is
adequate.

If an application is very demanding, for example if the environment is not well controlled
or if toxic gas is often present, then more frequent calibration than every 3 months may be
necessary.

This section describes how to calibrate the toxic detector. It includes procedur es to prepar e
for calibrat ion, set the fresh air re ading, set the response reading, and return to norma l
operation. It describes calibration using a calibration kit that includes a calibration cup,
calibration gas, sample tubing, and a fixed flow regulator with an on/off knob. The
required sample flow rate and calibration cup depend on the detector being calibrated.
Table 2 below lists the required calibration cups and regulators for the various toxic
detectors.

Ta ble 2: Required Calibration Cups and Flow Rates

Required Regulator/

Flowrate for Ca libration

Gas

Calibration Cup

Yes

Detector Type

Arsine (AsH

Required

Calibration Cup

) 81-1138RK 81-1051RK, 0.5 LPM (liters

3

per minute)

Chlorine (Cl

), 0 - 3.00 ppm

2

81-1138RK-CL2 81-1051RK, 0.5 LPM No

and 0 - 10.0 ppm
Hydrogen Cyanide (HCN) 81-1138RK 81-1051RK, 0.5 LPM Yes
Ammonia (NH

Phosphine (PH
Sulphur Dioxide (SO

) 81-1138RK-NH3 81-1051RK-25, 0.25 LPM No

3

) 81-1138RK 81-1051RK, 0.5 LPM Yes

3

) 81-1138RK 81-1051RK, 0.5 LPM Yes

2

W ARNING: Not using the recommended calibration cup, sample flowrate, and specified

flow direction (for 81-1138RK calibration cup only) will result in an
inaccurate calibration. Make sure to use the calibration cup and sample
flow rate listed in Table 2 for your target gas when performing a
calibration. Also make sure to connect the sample tubing to the calibration
cup port that results in the specified flow direction for the 81-1138RK
calibration cup.

Flow Direction

Specified on

Prepari ng for Ca libration

1. Unscrew the splashguard from the detector housing cap. Make sure the cap remains
securely screwed onto the housing body.

2. Push the calibration cup onto the plug-in sensor that sticks through the housing cap.
The calibration cup seals to the sensor with an O-ring.

12 • 65-2300RK/65-2301RK Tox ic Detector

3. Screw the regulator into the zero air calibration cylinder.

4. Use the sample tubing to connect the regulator to the calibration cup. Make su re to
connect the tube to the inlet side of the calibration cup if using the 81-1138RK
calibration cup which is marked on the outside bottom to show the required flow
dire ction t hrough the cup.

NOTE If you can verify that the toxi c detector is in a fresh air environment, you do not

need to apply zero air to the detector before adjusting the fresh air reading.

5. Put the controller into its calibration program. See the controller operator’s manual
for instructions to enter the calibration program.

Setting the Zero (Fresh Air) Reading

1. Follow the instructions in the controller operator’s manual for setting the zero
reading.

2. When the instructions call for applying z e ro air to the detector, turn the regulator’s
on/off knob counterclockwise to open it. Gas will begin to flow.

3. Allow the gas to flow for two minutes.

4. Set the fresh air reading according to the controller operator’s manual.

5. Turn the regulator’s on/off knob clockwise to close it.

6. Unscrew the regulator from the zero air calibration cylinder. Leave the sample tubing
connected to the regulator and the calibration cup.

NOTE: Depending on the size of your zero air cylinder, it is possible that you will have a

different regulator for the zero air cylinder and toxic gas cylinder. If necessary to
fit the calibration toxic gas cylinder, change the regulator.

Setting the Response Reading (Span)

1. Screw the regulator into the calibration gas cylinder.

2. Follow the directions in the controller operator’s manual for setting the response
(span) reading.

3. When the directions call for exposing the detector to gas, turn the regulator’s on/off
knob counterclockwise to open it. Gas will begin to flow.

4. Allow the gas to flow to the detector for 2 minutes.

5. Set the response reading according to the controller operator’s manual.

6. After setting the response reading, turn the regulator’s on/off knob clockwise to turn
it off.

7. Unscrew the regulator from the cylinder and gently pull the calibration cup off of the
plug-in sensor.

NOTE: For convenience, leave the regulator and calibration cup connected by the

sample tubing.

8. Allow about 45 seconds for the gas reading to decrease below the alarm points and
then return the controller to normal operation.

65-2300RK/65-2301RK Toxic Det ec t or • 13

NOTE: If you do not allow the gas reading to decrease below the alarm points, then

unwanted alarms may occur.

9. Verify that the controller display reading decreases and stabilizes a t 0 ppm.

10. Store the components of the calibration kit in a safe and conv enient place.

Parts List

Table 3 lists replacement parts and accesso ri e s for the toxic detector.

Table 3: Parts List

Part Number Descripti o n

06-1283RK Calibration kit sample tubing, 3 foot teflon w/flexible tubing on ends
07-0125RK Detector housing cap gasket
18-0400RK-01 Junction box with rubber spacers
65-2300RK-ASH3 Replacement detector assembly, AsH

65-2300RK-CL2 R eplacement detector assembly, Cl

(includes plug-in sensor)

3

, 0 - 3.00 ppm range

2

(includes plug-in sensor)

65-2300RK-CL-10 Replacement detector assembly, Cl

, 0 - 10.0 ppm range

2

(includes plug-in sensor)
65-2300RK-HCN Replacement detector assembly, HCN (includes plug-in sensor)
65-2300RK-NH3 Replacement detector assembly, NH

65-2300RK-PH3 Replacement detector assembly, PH
65-2300RK-SO2 Replacement detector assembly, SO

(includes plug-in sensor)

3

(includes plug-in sensor)

3

(includes plug-in sensor)

2

71-0146RK 65-2300RK/65-2301RK Operator’s Manual (this document)
81-0076RK Zero air calibration cylinder, 17 liter steel
81-0076RK-01 Zero air calibration cylinder, 34 liter steel
81-0076RK-03 Zero air calibration cylinder, 103 liter steel
81-0170RK-02 Calibration cylinder, 5 ppm SO

81-0170RK-04 Calibration cylinder, 5 ppm SO

in nitrogen, 58 liter aluminum

2

in nitrogen, 34 liter aluminum

2

81-0175RK-02 Calibration cylinder, 10 ppm NH
81-0175RK-04 Calibration cylinder, 10 ppm NH

in nitrogen, 58 liter aluminum

3

in nitrogen, 34 liter aluminum

3

81-0185RK-02 Calibration cylinder, 0.5 ppm PH3 in nitrogen, 58 liter aluminum, used to

calibrate PH

and AsH3 detectors, see conversion factor on AsH3 plug-in sensors

3

81-0185RK-04 Calibration cylinder, 0.5 ppm PH3 in nitrogen, 34 liter aluminum, used to

calibrate PH

14 • 65-2300RK/65-2301RK Tox ic Detector

and AsH3 detectors, see conversion factor on AsH3 plug-in sensors

3

Table 3: Parts List

Part Number Descripti o n

81-0190RK-02 Calibration cylinder, 5 ppm Cl2 in nitrogen, 58 liter
81-0190RK-04 Calibration cylinder, 5 ppm Cl
81-0192RK-02 Calibration cylinder, 2 ppm Cl
81-0192RK-04 Calibration cylinder, 2 ppm Cl

in nitrogen, 34 liter

2

in nitrogen, 58 liter, aluminum

2

in nitrogen, 34 liter aluminum

2

81-0196RK-02 Calibration cylinder, 10 ppm HCN in nitrogen, 58 liter aluminum
81-0196RK-04 Calibration cylinder, 10 ppm HCN in nitrogen, 34 liter aluminum
81-1050RK Regulator with gauge and knob , 0.5 LPM, for 17 liter and 34 li ter steel cali bration

cylinders (used for 34 liter zero air cylinder only)
81-1051RK Regulator with gauge and knob, 0.5 LPM, for 34AL/58/103 liter calibration

cylinders
81-1051RK-25 Regulator with gauge and knob, 0.25 LPM, for 34AL/58/103 liter calibration

cylinders (used to calibrate NH
81-1 13 8RK Calibration cup, general (SO

toxic detector only)

3

), for ESM-01, use 0.5 LPM flow

2

81-1138RK-CL2 Calibration cup, for ESM-01 Cl2, use 0.5 LPM flow
81-1138RK-NH3 Calibration cup, for ESM-01 NH3, use 0.25 LPM flow
81-F503RK Calibration kit, includes regulator, calibration cup, and a 58 liter 10 ppm NH

3

in

nitrogen aluminum calibration cylinder
81-F503RK-LV Calibration kit, includes regulator, calibration cup, and a 34 liter 10 ppm NH

nitrogen aluminum calibration cylinder
81-F603RK Calibration kit, includes regulator, calibration cup, and 58 liter 2 ppm CL

2

in

nitrogen aluminum calibration cylinder
81-F603RK-LV Calibration kit, includes regulator, calibration cup, and 34 liter 2 ppm CL

2

in

nitrogen aluminum calibration cylinder
81-F702RK Calibration kit, includes regulator, calibration cup, and a 58 liter 5 ppm SO

2

nitrogen aluminum calibration cylinder
81-F702RK-LV Calibration kit, includes regulator, calibration cup, and a 34 liter 5 ppm SO

2

nitrogen aluminum calibration cylinder
81-F811RK Calibration kit, includes regulator, calibration cup, and a 58 liter 0.5 ppm PH

nitrogen aluminum calibration cylinder
81-F811RK-LV Calibration kit, includes regulator, calibration cup, and a 34 liter 0.5 ppm PH

nitrogen aluminum calibration cylinder
ESM-01DH-ASH3 ESM-01 plug-in sensor, 0 - 1.50 ppm arsine
ESM-01DH-D-HCN ESM-01 plug-in sensor, 0 - 15.0 ppm hydrogen cyanide
ESM-01DH-D-SO2 ESM-01 plug-in sensor, 0 - 6.00 ppm sulphur dioxide, diffusion type only

3

in

in

3

3

in

in

in

65-2300RK/65-2301RK Toxic Det ec t or • 15

Table 3: Parts List

Part Number Descripti o n

ESM-01DH-PH3 ESM-01 plug-in sensor, 0 - 1.00 ppm phosphine
ESM-01R-D-NH3 ESM-01 plug-in sensor, 0 - 75.0 ppm ammonia, diffusion type only
ESM-K01-D-CL2 ESM-01 plug-in sensor, 0 - 3.00 ppm chlorine, diffusion type only
ESM-K01D-CL2-10 ESM-01 plug in sensor, 0 - 10.0 ppm chlorine, diffusion type only

16 • 65-2300RK/65-2301RK Tox ic Detector