Net Safety Monitoring ECO-SENSE Operating Manual
ECO-SENSE SINGLE CHANNEL
TRANSMITTER
User Manual
MODEL: ECO-A-X
MAN-0114 Rev 0
February 11, 2010
Table of Contents
SECTION 1 – SAFETY INFORMATION ............................................................... 1
1.1 Safety Information – Read Before Installation & Applying Power ......................... 1
1.2 Contacting Net Safety Monitoring Inc. ...................................................................... 1
SECTION 2 – INSTALLATION INSTRUCTIONS ................................................. 2
2.1 Introduction .................................................................................................................. 2
2.2 Ratings and Certifications .......................................................................................... 2
2.3 Transmitter / Sensor Location ................................................................................... 3
2.4 The ECO-A-X Enclosure .............................................................................................. 4
2.5 System Design Specifications ................................................................................... 5
2.6 Field Wiring Installation .............................................................................................. 5
2.7 2-Wire 4-20mA Explosion Proof Installations ........................................................... 5
ECO-A-X Transmitter Board Terminals .......................................................................... 6
SECTION 3 – INITIAL START-UP ....................................................................... 7
3.1 “Transmitter Configuration” Menu ............................................................................ 7
3.1.1 Single Gas Monitor Configuration ...................................................................... 7
3.1.2 Output Zero / Output Span Trims (Factory Preset, Technicians only!): ......... 7
3.1.3 Model Name .............................................................................................................. 7
3.2 Initial Toxic Monitor Start-Up ..................................................................................... 7
3.2.1 Initial Toxic Monitor “Span” Check ................................................................... 7
SECTION 4 – OPERATING INSTRUCTIONS ...................................................... 8
4.1 Routine Sensor Calibrations ...................................................................................... 8
4.2 ALARM OPERATION ................................................................................................. 10
4.2.1 ALARM 3 – UNDERSTANDING FAULT / LEVEL OPERATION ....................... 10
SECTION 5 – SETUP MENU CONFIGURATION .............................................. 11
5.1 Menus Database Configuration ............................................................................... 11
5.2 Configuration Using the Magnet: ............................................................................. 11
5.3 System Configuration Menus: ................................................................................. 12
Measurement Name ........................................................................................................ 12
Eunits ............................................................................................................................... 12
Zero .................................................................................................................................. 12
Span ................................................................................................................................. 12
Decimal Points ................................................................................................................ 12
Cal Span Value ................................................................................................................ 12
Readout Deadband ......................................................................................................... 12
Track Negative ................................................................................................................ 12
Linearization Data ........................................................................................................... 13
Backup Config. ............................................................................................................... 13
Restore Config. ............................................................................................................... 13
5.4 Alarm Settings: .......................................................................................................... 14
5.5 Sensor Information: .................................................................................................. 15
5.6 CLOCK/DELAY SETUP: ............................................................................................ 15
5.7 LCD Contrast Adj: ..................................................................................................... 16
5.8 HELP Screen: ............................................................................................................. 16
5.9 Diagnostics: ............................................................................................................... 16
5.10 SYSTEM SECURITY: ................................................................................................. 17
5.11 TECHNICIANS ONLY MENUS: .................................................................................. 17
Troubleshoot ................................................................................................................... 17
SECTION 6 – HOW TO RETURN EQUIPMENT ................................................ 18
Appendix ........................................................................................................... 19
Appendix A: Electrostatic Sensitive Device (ESD) ............................................................ 19
Appendix B: Resistance Table ............................................................................................ 20
Appendix C: ECO Sense Specifications ............................................................................. 21
1
SECTION 1 – SAFETY INFORMATION
WARNING: Read and understand the contents of this manual prior to operation. Failure
to do so could result in injury or death.
Note: Users are responsible for correct translations of this manual into their native language.
1.1 Safety Information – Read Before Installation & Applying Power
IMPORTANT
Users should have a detailed understanding of ECO-SENSE (ECO-A-X) Transmitter operating
and maintenance instructions. Use the transmitter only as specified in this manual or detection of
gases and the resulting protection provided may be impaired. Read the following WARNINGS
prior to use.
WARNINGS:
• Calibrate with known target gas at start-up and check on a regular schedule, at least
every 90 days. More frequent inspections are encouraged to spot problems such as dirt,
oil, paint, grease or other foreign materials on the sensor head.
• Do not paint the sensor assembly or the Transmitter.
• Do not use the ECO-A-X if its enclosure is damaged or cracked or has missing
components.
• Make sure the cover, internal PCB’s and field wiring are securely in place before
operation.
• Use only a sensor assembly compatible with the unit and approved by Net Safety.
• Periodically test for correct operation of the system’s alarm events by exposing the
monitor to a targeted gas concentration above the High Alarm setpoint.
• Do not expose the unit to electrical shock or continuous severe mechanical shock.
• Protect the unit from dripping liquids and high power sprays.
• Use only for applications described within this manual.
CAUTION: FOR SAFETY REASONS THIS EQUIPMENT MUST BE OPERATED AND
SERVICED BY QUALIFIED PERSONNEL ONLY. READ AND UNDERSTAND INSTRUCTION
MANUAL COMPLETELY BEFORE OPERATING OR SERVICING.
ATTENTION: POUR DES RAISONS DE SÉCURITÉ, CET ÉQUIPEMENT DOIT ÊTRE UTILISÉ,
ENTRETENU ET RÉPARÉ UNIQUEMENT PAR UN PERSONNEL QUALIFIÉ. ÉTUDIER LE
MANUE D’INSTRUCTIONS EN ENTIER AVANT D’UTILISER, D’ENTRETENIR OU DE
RÉPARER L’ÉQUIPEMENT.
WARRANTY
workmanship for a period of 24 months from date of purchase. No other warranties or liabilities
expressed or implied, will be honoured by Net Safety Monitoring Inc. Contact Net Safety
Monitoring Inc., or authorized distributor for details.
– Net Safety Monitoring Inc., warrants this product against defective parts and
1.2 Contacting Net Safety Monitoring Inc.
To contact Net Safety Monitoring. Inc., call, fax, email or write:
403–219-0688 FAX 403-219-0694 Email: nsmsales@net-safety.com
AB. Canada T1Y 7J7 Or visit us on the World Wide Web:
www.net-safety.com
2721 Hopewell Place NE Calgary
1
SECTION 2 – INSTALLATION INSTRUCTIONS
2.1 Introduction
Important: This manual describes the 2-Wire 4-20mA versions of the ECO-A-X. The unit is a
fixed-point monitor designed to provide continuous monitoring of hazardous gases in the
workplace. Monitored values are displayed in their engineering units as well as graphically as a
bar graphs or 30-minute trends (Figure 2.1). Input is for the electrochemical toxic sensor which is
supplied by the factory. The ECO-A-X advanced microcontroller electronics and superior graphic
LCD operator interface offers enhanced diagnostics and fault analysis not possibl e in competing
products. The unit provides a standard 4-20 mA output signal for connection to control systems
or other alarm instrumentation. Non-volatile memory retains all configuration data during power
interruptions. Magnetic, non-intrusive calibration can be easily performed by one person without
opening the enclosure. A standard “real time clock & calendar” feature allows data logging of
calibrations and alarm events for recall to the LCD readout.
Only periodic calibration checks are needed to assure dependable performance. Operator
interface is very intuitive with the LCD displaying data both graphically as bar-graphs / trends and
in engineering units (Figure 2-1). Additional features include:
• No potentiometer or jumper settings required. All setup is with menus accessed via the LCD
/ magnetic keypad operator interface without opening the enclosure.
• Field adjustable alarm levels may be high, low, fault, fail-safe, latching and acknowledgeable.
• New alarms cause front LED’s to flash and become steady after acknowledge.
• CAL MODE advises when to apply gas during calibrations
• One half hour trend screen shows rate of change of gas exposures
• Sensor life bar-graph updates after each SPAN calibration.
• Modular design affords efficient installation and plug in sensors allow changing target gases
after installation
• New smart sensors are recognized by the ECO-A-X and prompts users to either upload new
configuration data or continue with data from the previous smart sensor.
• Sensors are industry proven for fast response and long life.
Engrg. Units / Bar Graph
Engrg. Units / 30-Minute Trend
ALM RST
ALM1 ALM2 FAIL
PPM
Measur ement Name
10
H2S
NEXTUP/
NEXT key
RXD
toggles
readout
RS485
TXD
EDITDOWN/CAL
ALM RST
ALM1 ALM2 FAIL
10
PPM
H2S
NEXTUP/
RXD
RS485
TXD
EDITDOWN/CAL
Figure 2-1: Data Displays
2.2 Ratings and Certifications
ATEX certified for hazardous locations. ATEX certificate # DNV 09 ATEX 60195X. Refer to
Appendix C for information on specification and certification.
Special Conditions of Safe Use (X):
Enclosure volume shall not be increased by the addition of the Ex d sensor.
2
2.3 Transmitter / Sensor Location
Prior to the installation process, a location plan for placing the transmitter and sensor should be
developed. Factors such as accessibility, air movement, gas density in relation to air, emission
sources and environmental variables affect correct sensor and transmitter location.
Air movement by fans, prevailing winds and convection should be carefully evaluated to
determine if a leak is more likely to raise gas levels in certain areas within the facility. Vapor
density of a gas determines if it will rise or fall in air when there are no significant currents.
Lighter than air gases should have the monitors mounted 12 – 18 inches (30 – 45 centimeters)
above the potential gas leak and heavier than air gases should be this distance below. Even
though the ECO-A-X is designed for rugged service, sensors should be protected from
environmental damage from water, snow, shock, vibration and dirt.
Consider the following points when planning installation:
• Locate the controller where it will be accessible and visible.
• Carefully locate sensor in an area where gases may potentially accumulate.
• Use redundant systems to enhance protection and reliability.
• Light gases tend to rise; heavy gases tend to accumulate in low areas.
• Consider the air movement patterns within the facility.
• Consider the construction of the facility (such as trenches where heavy gases may
accumulate or peaks where light gases may accumulate)
• Seek advice from experts knowledgeable about the primary gas to be detected.
• Use common sense and refer to the regulatory publications that discuss guidelines for
your industry. The two most common installations options are as follows
Option 1
The sensor may be installed separated from the transmitter using a Certified Junction Box. If the
Net Safety Junction Box is being used, refer to JB-MPG-A/S in the Net Safety Multipurpose Junction Box (MAN-0081) for terminal designations. The transmitter is located near
eye- level. Conduit is run from the controller to the sensor. A Calibration Cup (CCS-1) can be
attached to the sensor. Tubing can be run from the CCS-1 to a convenient location accessible for
calibration gas to be injected.
Option 2
The sensor is wired directly to the controller. CCS-1 and tubing is used to facilitate calibration.
CCS-1
Controller (Transmitter) and sensor wired- separated drawing
.
3
2.4 The ECO-A-X Enclosure
The ECO-A-X enclosure is an Aluminum or Stainless Steel explosion-proof (NEMA 4X) enclosure
as shown in Figure 2-2.
Table 1: ECO Sense (ECO-A-X) housing and sensor dimensions (A through J) in Inches and mm
ECO-A-X Transmitter &
sensor
Transmitter & sensor(AL) 4.8 122 3.6 91 3.6 91 4.8 122 5.1 130 0.3 7.6 2.6 66 2.9 74
Transmitter & sensor(SS) 4.7 119 3.6 91 3.6 91 4.7 119 5.1 130 0.3 7.6 2.6 66 2.9 74
A B C D E F G H
in mm in mm in mm in mm in mm in mm in mm in mm
Table 1: (cont’d)
ECO-A-X Transmitter &
sensor
Transmitter & sensor(AL) 3.0 76 9.0 229
Transmitter & sensor(SS) 2.8 71 8.9 226
I J
in mm in mm
A
B
CD
I
E
J
F
G
H
Figure 2-2 ECO-A-X Explosion-Proof Housing
4
WARNING: Qualified personnel should perform the installation according to applicable
electrical codes, regulations and safety standards. Insure correct cabling and sealing fitting
practices are implemented. Also, never install the sensor pointing upwards.
2.5 System Design Specifications
Supply Voltage:
10 to 30 VDC
Power Consumption:
• Toxic Sensors (2-wire 4-20mA operation): 25 mA @ nominal 24 VDC.
Memory:
Non-volatile E2 memory retains configuration values in the event of power outages. Loop
Resistance at nominal 24 VDC power: 650 ohms maximum in 2-wire mode.
2.6 Field Wiring Installation
4-20mA Transmission Range Info:
The distance 4-20 mA signals can travel is dependent upon several factors including the cable
gauge, DC power supply voltage level and impedance of the input of the receiving device.
Assuming a nominal 24 VDC power supply, the maximum total loop resistance should be 650
ohms. See Appendix B for resistance table.
2.7 2-Wire 4-20mA Explosion Proof Installations
ECO-A-X equipped with smart sensor heads are NRTL (Nationally Recognized Testing Lab)
certified as suitable for explosion proof installations. All ECO-A-X’s are NRTL certified for
explosion proof installations as long as the sensor head is certified as explosion proof.
Description:
The 2-wire current sinking transmitter is the easiest and most economical to install since there are
only two wires. All of the power needed comes from the current loop and wire sizes may be
smaller. However, only very low power applications are eligible for such transmitters. The ECOA-X Display assembly shown in Figure 2-3 consumes <2.5 mA of quiescent current. Toxic
electrochemical sensors generate their own signals and therefore require no additional current.
CAUTION: It is important to understand the receiver, or controller device must supply the loop
power in 2-wire 4-20mA modes. Be sure the receiver to be used supports this type of operation.
Instructions:
Unscrew the cover on the ECO-A-X explosion-proof enclosure. Loosen the 2 thumbscrews
holding the display assembly in place and remove it. A small sensor cable is attached with
sufficient length to allow access to the back of the display assembly where 2 position TB1 is
located. Route the receiver wires through the conduit entry and connect to TB1. Steering diodes
in the ECO-A-X 2-wire 4-20mA output automatically correct for polarity so positive and negative
are interchangeable. Reassemble the ECO-A-X. Follow the procedures and recommendations
in the receiver manual to complete the installation. Be sure the ECO-A-X enclosure and conduit
are properly grounded. Apply loop power by appropriately powering the receiver device (DCS,
PLC, Controller, etc) and the ECO-A-X should function.
5
ECO-A-X Transmitter Board Terminals
Backside of 10-0232
Display Assembly
Display
Assy 10-0232
S4 Not used
2-WIRE
4-20mA
Output
(Non-Polar)
(EC Only)
Not used
S3 Not used
TB2 “Simple”
electrochemical
sensor input
Figure 2-3: 10-0232 Display / 2-Wire 4-20mA Assembly
Table 2: Sensor Terminal connection Table 3: Power Terminal connection
TB2 Sensor Terminals
Sensor Wire
Terminal
designation
White CTR
Red REF
Black SEN
TB1 Power Terminals - non polar
TB1
TB1 top
terminal
TB1 bottom
terminal
Note: In Table 3, TB1 Terminals (Power Terminals) are non-polarized; if (+) 24VDC is con nected
to TB1 bottom terminal, and (-) 24VDC connected to TB1 top terminal a loop current of 4-20mA
would still be obtained.
Sensor separation
Since the sensor must be located where gas is likely to accumulate and the controller where it
can be easily reached, it is often necessary to “separate” the controller and sensor. This is done
with the aid of the Sensor Separation kit. The Sensor Separation kit is composed of a Net Safety
Multi-purpose Junction Box and terminal strip. Refer JB-MPG-A/S in the Multi-purpose
Junction Box manual (MAN-0081) for terminal designations.
TB1 Top
terminal
Wires for power
and 4-20 mA output
TB1 bottom
terminal
Power
Connections
(+) 24VDC
(-) 24VDC
6
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