RKI Instruments 61-1001RKSS User manual

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61-1001RKSS
Hydrogen Detector
Operator’s Manual
Part Number: 71-0229RK
Revision: P1
Released: 1/11/18

61-1001RKSS Hydrogen Detector
WARNING
Read and understand this instruction manual before operating
detector. 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 frequencies for most applications are between
3 and 6 months, but can be required more often or less often
based on your usage.

61-1001RKSS Hydrogen Detector
Product Warranty
RKI Instruments, Inc. warranties 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 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 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

61-1001RKSS Hydrogen Detector
Table of Contents
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
NC-6205-01 Hydrogen Detector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Junction Box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Mounting the Hydrogen Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Wiring the Hydrogen Detector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Startup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Introducing Incoming Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Setting the Zero Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Replacing the Hydrogen Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Preparing for Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Setting the Zero Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Setting the Response Reading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Returning to Normal Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

61-1001RKSS Hydrogen Detector • 1
Overview
This manual describes the 61-1001RKSS hydrogen detector (internal amplifier type). This
manual also describes how to install, start up, maintain, and calibrate the detector 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 hydrogen detector.
Specifications
WARNING: Do not use this product in a manner not specified in this instruction
manual.
Table 1 lists specifications for the hydrogen detector.
WARNING: When using the 61-1001RKSS, you must follow the instructions and
warnings in this manual to assure proper and safe operation of the
61-1001RKSS and to minimize the risk of personal injury. Be sure to
maintain and periodically calibrate the 61-1001RKSS as described in this
manual.
Table 1: 61-1001RKSS Specifications
Description Specifications
Target Gas Hydrogen
Area Classification Explosion proof for Class I, Groups B, C, and D
Sampling Method Diffusion
Detection Range 0 to 100 %LEL
Response Time 90% in 45 seconds
Accuracy ± 5% of reading or ± 2% LEL (whichever is greater)

2 • 61-1001RKSS Hydrogen Detector
Description
This section describes the components of the NC-6205-01 and 61-1001RKSS detectors. The
61-1001RKSS includes the NC-6205-01 hydrogen detector and a junction box. A four point
terminal strip is provided inside the junction box for detector connections.
Figure 1: 61-1001RKSS Component Location
NC-6205-01 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 NPT nipple with a
sintered 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
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. The controller conduit hubs are
normally 3/4 in. NPT, so a 3/4 in. x 1/2 in. NPT reducer may be necessary to install the
hydrogen detector. A rainshield screws onto the bottom of the detector (flame arrestor
end). The rainshield helps protect the detector from rain and debris in the monitoring
environment. Four color-coded leads extend from the top of the detector. The leads allow
you to connect the detector to the terminal block.
Junction Box
The stainless steel, corrosion resistant junction box allows you to install the 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 detector to the junction box and
connect the wiring from the detector to a controller. An O-ring seals the interface between
the junction box cover and the junction box base.
The bottom conduit hub includes a 3/4 in. x 1/2 in. NPT reducer that allows you to screw
the detector into the hub. The 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
J-Box
Red Green
Black
Locking Set Screw
White

61-1001RKSS Hydrogen Detector • 3
junction box. A locking set screw on the junction box cover allows you to secure the
junction box cover and prevent it from being removed.
Installation
This section describes procedures to mount the hydrogen detector in the monitoring
environment and wire the detector to a controller.
Mounting the Hydrogen 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 where the target gas is likely to be found first. For hydrogen, which is
lighter than air, mount the detector near the ceiling or where hydrogen is most
likely to accumulate.
Figure 2: Mounting the Hydrogen Detector
2. At the mounting site you select, hang or mount the junction box with the detector
facing down (see Figure 2).
3/4 NPT
Female,
2X
.20 Dia. x .45
Slot, 2X
3.66
3.15
2.40
Hydrogen Detector
J-Box
.75
3.34
7.40 MAX

4 • 61-1001RKSS Hydrogen Detector
Wiring the Hydrogen Detector to a Controller
WARNING: Always verify that the power to the controller is off before you make
wiring connections.
1. Turn off the controller.
2. Turn off power to the controller.
3. Remove the junction box cover.
4. Guide a four-conductor, shielded cable or four wires in conduit through the unused
conduit hub of the junction box. Use appropriate conduit fittings and construction
technique for the environmental rating and hazardous location classification of the
junction box. The junction box is rated NEMA 4X and classified explosion proof for
Class I, Groups B, C, and D.
5. Connect the detector leads to the terminal block 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.
6. Secure the junction box cover to the junction box.
7. Route the cable or wires leading from the hydrogen detector through one of the
conduit hubs at the controller housing. Use appropriate conduit fittings 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 disrupt the transmission of the detector signal to the controller.
8. 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
61-1001RKSS detector.
9. 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.

61-1001RKSS Hydrogen Detector • 5
Figure 3: Wiring the Hydrogen Detector to a Controller
Red
White
Green
Black
J-Box
Terminal Strip
Detector Wires
Green
Black
White
Hydrogen Detector
Controller LEL
Detector Terminals
Red

6 • 61-1001RKSS Hydrogen Detector
Start Up
This section describes procedures to start up the hydrogen 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 power to the controller.
4. Turn on the controller.
5. Verify that the controller is on and operating properly. Refer to the controller
operator’s manual.
CAUTION: Allow the detector to warm up for 5 minutes before you continue with the next
section, “Setting the Zero Reading”.
Setting the Zero Reading
WARNING: Do not remove the junction box cover while the circuits are energized
unless the area is determined to be non-hazardous. Keep the junction box
cover tightly closed during operation.
CAUTION: If you suspect the presence of hydrogen in the monitoring environment, use the zero
air calibration cylinder to introduce “fresh air” to the detector and verify an accurate
zero reading.
1. Verify that the detector is in a fresh air environment (environment known to be free of
hydrogen and of normal oxygen concentration, 20.9%).
2. Verify a reading of 0% LEL at the controller.
If the display reading is 0% LEL, start up is complete. The hydrogen detector is in
normal operation. If the display reading is not 0% LEL, continue with step 3.
3. Perform a zeroing operation at the controller. See the controller operator’s manual for
directions.