RKI Instruments EC-600 User manual

Indoor Carbon Monoxide Monitor
EC-600
Operating Manual
Part Number: 71-0417
Revision: P1
Released: 3/22/17

2
Contents
1. Outline of the Product.....................................................................................................................................3
Preface............................................................................................................................................................3
Purpose of use................................................................................................................................................3
Definition of DANGER, WARNING, CAUTION and NOTE ............................................................................4
Method of confirmation for CE marking type..................................................................................................4
2. Important Notices on Safety...........................................................................................................................5
2-1. Danger cases...........................................................................................................................................5
2-2. Warning cases.........................................................................................................................................6
2-3. Precautions..............................................................................................................................................6
3. Product Components......................................................................................................................................7
3-1. Main unit and standard accessories........................................................................................................7
3-2. Names and functions for each part .........................................................................................................9
4. How to Install................................................................................................................................................12
4-1. Precautions for installation points .........................................................................................................12
4-2. Precautions for system designing .........................................................................................................13
4-3. Installation of main unit..........................................................................................................................15
4-4. Precautions for wiring............................................................................................................................18
5. How to Use...................................................................................................................................................21
5-1. Before using the monitor .......................................................................................................................21
5-2. Preparation for start-up .........................................................................................................................21
5-3. Basic operating procedures...................................................................................................................22
5-4. Power-on ...............................................................................................................................................23
5-5. Modes....................................................................................................................................................24
5-6. User mode.............................................................................................................................................25
5-7. Power-off ...............................................................................................................................................28
6. Alarm Activation and Functions....................................................................................................................29
6-1. Gas alarm activation..............................................................................................................................29
6-2. Fault alarm activation ............................................................................................................................34
6-3. Suppression function.............................................................................................................................34
7. Maintenance.................................................................................................................................................35
7-1. Maintenance intervals and items...........................................................................................................35
7-2. Maintenance (regular maintenance) mode ...........................................................................................36
7-3. Preparation for zero and span adjustment………………………………..…………………………………42
7-4. Zero Adjustment………………………………………………………………………………………………..43
7-5. Span Adjustment……………………………………………………………………………………………….44
7-6. Environmental Settings………………………………………………………………………………………..45
7-7. Return to User Mode…………………………………………………………………………………………..52
7-8. Component Replacement……………………………………………………………………………………..52
7-9. Replacing a Sensor Cable…………………………………………………………………………………….54
7-10. Adding a Sensor Cable……………………………………………………………………………………….57
8. Storage and Disposal...................................................................................................................................62
8-1. Procedures to store the monitor or leave it for a long time...................................................................62
8-2. Procedures to relocate the monitor or use it again...............................................................................62
8-3. Disposal of products..............................................................................................................................62
9. Troubleshooting............................................................................................................................................63
10. Product Specifications................................................................................................................................65
10-1. List of specifications ............................................................................................................................65
10-2. List of accessories...............................................................................................................................66
11. Parts List…………………………………………………………………………………………………………….67
12. Appendix.....................................................................................................................................................68
12-1. Detection principle of electrochemical type.........................................................................................68
12-2. Definition of terms................................................................................................................................69

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1
1. Outline of the Product
Preface
Thank you for choosing our indoor carbon monoxide monitor EC-600 (hereinafter referred to as the
monitor). Please check that the model number of the product you purchased is included in the
specifications on this manual.
This manual describes how to use the monitor properly and its specifications. First-time users and users
who have already used the monitor must read and understand the operating manual and use this product
as described in this manual.
Note that the contents of this manual are subject to change without notice for product improvement. It is
also prohibited to copy or reproduce this manual, in whole or in part, without permission.
Regardless of warranty period, we shall not make any indemnification for accidents and damage caused by
using the monitor.
Make sure to read the warranty policy specified on the warranty.
Purpose of use
This carbon monoxide monitor measures carbon monoxide in the air and issues an alarm using the buzzer
and LCD backlight when carbon monoxide concentration rises over a preset concentration (alarm setpoint).
While displaying measured carbon monoxide concentration on the LCD, the monitor converts it to an
analog signal of 4 - 20 mA or 0 - 1 V to output (only 0 - 1 V for the dry battery type) and outputs a two-step
gas alarm contact at a gas alarm state.
The monitor is a safety unit, not an analyzer which performs quantitative/qualitative analysis/measurement
for gas. Check the specifications before use and conduct measurement properly in accordance with
purposes.

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Definition of DANGER, WARNING, CAUTION and NOTE
Throughout this manual, the following indications are used to ensure safe and effective work.
DANGER This message indicates that improper handling may cause serious
damage on life, health or assets.
WARNING This message indicates that improper handling may cause serious
damage on health or assets.
CAUTION This message indicates that improper handling may cause minor damage
on health or assets.
NOTE This message indicates advice on handling.
Method of confirmation for CE marking type
(DC specification only)
The CE marking is labeled on the detector for versions that comply with CE marking. Please confirm the
instrument specification before using. Please refer to the Declaration of Conformity that is at the end of this
manual if you have CE marking type.
You can confirm instrument specification to see the CE marking as follows.
CE marking label (Bottom of instrument)
(DC specification, dry battery type only)
CE marking

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2
2. Important Notices on
Safety
To maintain the performance of the monitor and use it safely, observe the following instructions with
WARNING and CAUTION.
2-1. Danger cases
DANGER
•This is not an explosion-proof unit. Never attempt to measure a gas in an atmosphere over the
lower explosive limit.
WARNING
•If an abnormality is found in the monitor, contact RKI immediately. Visit our Web site to find your
nearest RKI office.
Web site: www.rkiinstruments.com

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2-2. Warning cases
2-3. Precautions
WARNING
•Before turning on the monitor, always check that the voltage is compliant with the specifications.
Operating on an unstable power supply may cause malfunctions.
•When the gas adjustment is performed, never fail to perform the air (zero) calibration in fresh air.
•Do not operate this monitor in a place where combustible/explosive gases or vapors are present.
Operating the monitor in such an environment will lead to extreme dangers.
•Issuance of a gas alarm indicates that there are extreme dangers. Take proper actions based on
your judgment.
•Perform span adjustment at fixed intervals.
•Do not run the power cable and remote sensor cable of the monitor in parallel with cables of
high-frequency or high-voltage and other device's power cables. It may cause malfunctions.
•If a cable of high-frequency or high-voltage and the power cable need to intersect with each other,
it should be orthogonally connected.
•When wiring, be careful not to apply any stresses on the cables by pulling, tightening or twisting,
etc.
•Do not disassemble/modify the monitor. It may invalidate the warranty of the performance.
Changing the settings without understanding them may cause alarm malfunctions. Please use the
monitor properly in accordance with the operating manual.
•Do not use the monitor with it attached to a control device, equipment, etc.
CAUTION
•Do not use a device, such as a transceiver, which transmits a radio wave near the monitor or its
cables. It may affect the measurement. If a transceiver or other radio wave transmitting device is
used, it must be used in a place away from the monitor where it disturbs nothing.
•Restarting the monitor within five seconds after turning it off may cause errors.
•This is not a control unit. It is not allowed to use the external output of the monitor to control other
units.
•This is a safety unit. Never fail to perform a regular maintenance to ensure safety. Continuing to use
the monitor without performing maintenance will compromise the sensitivity of the sensor, thus
resulting in inaccurate gas detection.
•Do not pick the sensor or buzzer opening with a sharp-pointed item. The unit may cause
malfunction or get damaged, possibly resulting in incorrect measurements.
•Do not let the monitor draw in water. Do not install the monitor in a place where the monitor may get
wet. Ignoring this may cause malfunction because the monitor is not water- or drip-proof.
•This is a precision device. Do not give strong shock or vibration to the monitor.
•When the case is opened for wiring or other operation, do not touch inner parts. When wiring, be
sure that excessive pressure is not applied to the power cable and remote sensor cable.
•Do not block the vent for the sensor.

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3
3. Product Components
3-1. Main unit and standard accessories
After opening the box, check the monitor and accessories.
If there is anything missing, contact RKI.
Main unit
For names and functions of individual parts of the monitor and LCD display, see "3-2. Names and functions
for each part" (P.9).
EC-600 main unit
Sensor unit (remote type)
NOTE
•The EC-600’s standard configuration is with the sensor installed in the main unit. Specify when
ordering if you want an extender cable with a remote sensor.
•The sensor integrated type does not include the remote sensor.
•The cable length for the remote type can be selected from 3, 5, 10 and 20 m.

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Standard accessories
- Cross-recessed pan head
machine screw (2 pcs.)
- Cross-recessed round head
wood screw (2 pcs.)
- 3.2 m AC power cable (1 pc.) *Supplied only withAC
specification
- Operating manual (1 pc.)
Optional accessories
- Mounting plate (1 pc.) RKI part number: 21-1927
- Gas calibration cup (1 pc.) RKI part number: 81-1153
Outline drawing
Main unit
Remote sensor
(Unit: mm)
CAUTION
•The main unit and sensor unit (remote type) are precision devices. Be careful not to drop the
monitor when installing or uninstalling the main unit or sensor unit. Dropping the monitor may
compromise its original performance or cause malfunctions.
Power switch
Cable outlet
Cable outlet
Cable outlet
Cable outlet
Display
Sensor
part
Mounting hole for 3-M3
Use one of the two for
lower holes
To main unit
Sensor
part

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3-2. Names and functions for each part
This section describes the names and functions of the individual parts and LCD display that make up the
monitor.
Main unit
Name
Major function
(1) Power switch
Turns the power ON/OFF. Slide the switch up to power on and down
to power off.
(2) MODE button
Hold down this button to enter the user mode.
It is also used to cancel or skip during setup.
(3) ˄button
Used to change the screen and increase numerical values during
setup.
(4)
˅
button
Used to change the screen and decrease numerical values during
setup.
(5)
SET button
Used to confirm the setting.
(6)
Buzzer sound opening
Emits operation and alarm sounds. (Do not block it.)
(7)
Sensor part
Detects a gas to be detected. The sensor is inside the cover.
(8)
Screw
Loosen this screw to open the case.
(9)
Activated carbon filter
Remove influence of the sloppy gas.
9

10
Display
Name
Major function
(1)
Operating state display
Displays the operating status. Blinks at a normal state.
(2)
1st alarm display
Lights up or flashes orange at a first alarm state.
(3)
2nd alarm display
Lights up or flashes red at a second alarm state.
(4)
Fault alarm display
Lights up in red at a fault alarm state.
(5)
Concentration value
display
Maintenance indicator
Displays the gas concentration.
Maintenance items and others are displayed during setup.
(6)
Unit display
Displays the unit (ppm) according to the specification.
(7)
Gas name display
Maintenance display
Displays the gas name.
Maintenance items and others are displayed during setup.
(8)
AC/DC power display
Lights up when the monitor is operating on AC or DC power.
(9) Battery level icon
Displays the battery level when the monitor is operating on dry
batteries.
(10)
This is not used for the monitor.
Installation of batteries (for dry battery type)
When the monitor is used for the first time, or when the battery level is low, install or replace with new AA
alkaline dry batteries according to the following procedure.
CAUTION
•Turn off the power of the monitor before replacing the batteries.
•Replace the batteries in a safe place where explosive gases are not present.
•Never fail to use alkaline batteries. If a rechargeable (secondary battery) nickel-cadmium battery
or nickel metal hydride battery is used, the specifications cannot be met, such as continuous
operating time, etc.
•Replace both batteries at the same time.
•Pay attention to the polarities of the batteries when installing them.
•After installing the batteries, lock the battery cover completely. If the battery cover is not
completely locked, the dry batteries may fall out.
•Do not use rechargeable batteries that may interrupt a measurement due to the discharge
characteristic of rechargeable batteries.