Millennium MLB-A-R-SIR100 Basic and Millennium Basic Plus Combustible Gas Detector
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MILLENNIUM
BASIC
COMBUSTIBLE
GAS DETECTOR
User Manual
MLB-A/R-SIR100
MLB+-A/R-SIR100
Part Number: MAN-0063-00 Rev 2
August 2005
Net Safety Monitoring Inc.
IMPORTANT INFORMATION
This manual is for informational purposes only. Although every effort has been
made to ensure the correctness of the information, technical inaccuracies may
occur and periodic changes may be made without notice. Net Safety Monitoring
Inc. assumes no responsibility for any errors contained within this manual.
If the product(s) or procedures are used for purposes other than as described in
the manual, without receiving prior confirmation of validity or suitability, Net
Safety Monitoring Inc. does not guarantee the results and assumes no obligation
or liability.
No part of this manual may be copied, disseminated or distributed without the
express written consent of Net Safety Monitoring Inc.
Net Safety Monitoring Inc., products are carefully designed and manufactured from
high quality components and can be expected to provide many years of trouble free
service. Each product is thoroughly tested, inspected and calibrated prior to
shipment. Failures can occur which are beyond the control of the manufacturer.
Failures can be minimized by adhering to the operating and maintenance
instructions herein. Where the absolute greatest of reliability is required,
redundancy should be designed into the system.
Warranty
Net Safety Monitoring Inc., warrants its sensors against defective parts and
workmanship for a period of 24 months from date of purchase; other electronic
assemblies for 36 months from date of purchase.
No other warranties or liability, expressed or implied, will be honoured by Net
Safety Monitoring Inc.
Contact Net Safety Monitoring Inc., or an authorized distributor for details.
We welcome your input at Net Safety Monitoring. If you have any comments
please contact us at the phone/address below or visit our web site and complete
our on-line customer survey: www.net-safety.com.
Contact Information
Net Safety Monitoring Inc.
2721 Hopewell Place NE
Calgary , AB
Canada
T1Y 7J7
Telephone: (403) 219-0688 Fax: (403) 219-0694
www.net-safety.com
E-mail: netsafe@net-safety.com
Copyright © 2005 Net Safety Monitoring Inc.
Printed in Canada
Net Safety Monitoring Inc.
TABLE OF CONTENTS
Important Information
Warranty
Contact Information
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
The Product .................................................................................................. ....1
The Manual .............................................................................................. .... ....1
Step 1 — Plan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Locate Controller/Sensor ................................................................................. 2
Figure 1: Locate Sensor/Controller ..........................................................................2
Figure 2: Controller Housing ..................................................................................3
Step 2 — Install . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Unpack ............................................................................................................. 3
The Controller Housing .........................................................................................3
The Sensor .................................. .. .........................................................................3
Step 3 — Wire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Field Installation .............................................................................................. 4
Seal ........................................................................................................................ 4
Mount .................................................................................................................... 4
Wiring .............................................................................................................. 5
Sensor and Controller ............................................................................................5
Table 1: Terminal Definitions-
Connecting Wires ............................................................................................5
Figure 3: Wiring Controller and Sensor—
Figure 4: Wiring Controller and Sensor—RELAY ............................................. 6
Table 2: Sensor Terminals—RELAY ................................................................ 6
Table 3: Output Terminals—RELAY ............................................................... 6
Sensor Separation—ANALOG OR RELAY .................................................... 7
Figure 5: Sensor Separation—ANALOG or RELAY .......................................... 7
Set Up .............................................................................................................. 8
Figure 6: Set Up—ANALOG ........................................................................... 8
Current Output .............................................................................. .........................8
Current Loop Measurement (Test Jacks) ..............................................................8
Table 4: Current Loop Measurement .......................................................................8
ANALOG ......................................................... 5
ANALOG ..........................................5
DIP Switches ....................................................................................................8
Set DIP Switch—ANALOG ..................................................................................8
Table 5: DIP Switch 2 Settings—
Set Dip Switch—RELAY ...................................................................................... 9
Figure 7: Set Up—
Table 6: DIP Switch 1 and 2 Settings—RELAY .................................................9
RELAY ............................................................................... 9
ANALOG ....................................................... 8
Step 4 — Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Analog and Relay ...........................................................................................10
Figure 8: Controller Functionality .......................................................................... 10
Table 7: State LEDs ................................................................................................10
Calibration Switch ..........................................................................................10
Power Up ........................................................................................................10
Step 5 — Calibrate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Calibrate Sensor .............................................................................................11
Calibration Procedure ............................................................ ..............................11
Figure 9: Calibration Procedure .............................................................................11
Calibration Failure ..................................... ....................................... .............12
Manual Reset .................................................................................................12
Step 6 — Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Sensor Fault ....................................................................................................12
Sensor Life .....................................................................................................12
Normal ............................................................................................................ 12
Output .............................................................................................................12
Current ................................................................................................................. 12
Relay .................................................................................................................... 12
Step 7 — Maintain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Troubleshoot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
How to Return Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Spare Parts/Accessories ..................................................................................14
Table 8: Part Numbering ..................................................... ...................................14
Appendix A: Electrostatic Sensitive Device (ESD) ........................14
Appendix B: Resistance Table .........................................................15
Appendix C: Specifications .............................................................. 16
Sensor (SIR100) Specifications ...........................................................................16
Controller Specifications .....................................................................................16
Net Safety Monitoring Inc.
INTRODUCTION
The Millennium series is Net Safety's latest innovation in a line of continuously evolving industrial gas detectors. The microcontroller based system provides fast,
accurate and continuous monitoring of gases in extreme environments.
THE PRODUCT
The Millennium Basic is available with analog or relay output, and both are explosion-proof, Class 1, Division 1 for hazardous areas, combustible gas detectors for
use with the SIR100 sensor (methane/propane).
THE MANUAL
The manual has been designed to make installation of the Millennium product easy . To ensure proper installation, follow the 7 simple steps outlined in the following
pages. Throughout this manual are tips and warnings to make your installation experience more efficient. If you encounter problems during operation, consult the
troubleshooting section or contact your sales representative.
Step 1 — PLAN
Step 2 — INSTALL
Step 3 — WIRE
Step 4 — OPERATE
Step 5 — CALIBRATE
Step 6 — MONITOR
Step 7 — MAINTAIN
MLB-A/R-SIR100 MLB+-A/R-SIR100 1
Net Safety Monitoring Inc
STEP 1 — PLAN
LOCATE CONTROLLER/SENSOR
Prior to the installation process, a location plan for placing the Controller and
Sensor should be developed. Although there are no absolute rules for
determining the quantity and location of a sensor or controller, the following
points should be considered when planning the installation.
• Locate the Controller where it will be accessible and visible.
• Carefully locate the sensor in an area where gases are most likely to
accumulate.
• Use redundant systems to enhance protection and reliability.
• Light gases tend to rise; heavy gases tend to accumulate in low areas.
• Consider 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 various regulatory publications that discuss
general guidelines for your industry.
The two most common installation options are as follows:
Option 1
The Sensor is attached directly to the Controller. A calibration cup is slipped
onto the bottom of the Senor and the gas is attached to the side calibration
fitting.
See "Sensor Separation—A
NALOG OR RELAY" on page 7 for detailed
instructions.
Figure 1: Locate Sensor/Controller
Junction Box
Sensor
(separated)
Calibration Cup
Tubing for
Calibration Gas
Conduit to
Controller
Apply Calibration Gas
Controller
Side Calibration
Fitting
See "Wiring Controller and Sensor—A
NALOG" on page 5 for detailed
instructions.
Option 2
Locate Sensor separate from Controller using a Junction Box.
The Controller is located near eye-level. Conduit is run from the Controller to
the Sensor. A Junction Box is used to connect the conduit from the Controller to
the Sensor. A Calibration Cup can be attached to the Sensor. Tubing can be run
TIP:
The Calibration Cup prevents air circulation af fecting the calibration
process and concentrates the gas during calibration. If the Calibration
Cup is not used, the area must be free of drafts or wind and the flow rate
of calibration gas must be 3.0 liters per minute or greater.
from the calibration cup to a convenient location accessible for calibration gas
to be injected.
MLB-A/R-SIR100 MLB+-A/R-SIR100 2
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Figure 2: Controller Housing
4.00”
3/4” NPT
4.88”
2.60”
0.53”
7.36”
3.85”
2.95”
0.66”
STEP 2 — INSTALL
UNPACK
Carefully remove all components from the packaging. Check components
against the enclosed packing list and inspect all components for obvious
damage such as broken or loose parts.
If you find any components missing or damaged, notify the distributor or Net
Safety Monitoring immediately.
The Controller Housing
13.14”
The Controller is explosion-proof, Class 1, Division 1, Groups C, D for
hazardous applications.
It is designed as a 1-man, intrusive calibration.
The Sensor can be attached directly to the Housing or separated using a junction
box.
To remove the cover, simply screw the cover counter clockwise.
The Sensor
The SIR100 combustible gas sensor detects 0-100% LEL for methane/propane.
0.50”
4.35”
3.25”
2.60”
4.4”
7.36”
MLB-A/R-SIR100 MLB+-A/R-SIR100 3
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STEP 3 — WIRE
FIELD INSTALLATION
WARNING:
Wiring codes and regulations may vary. Compliance with regulations is the
responsibility of the installer. Wiring must comply with applicable regulations
relating to the installation of electrical equipment in a hazardous area. If in
doubt, consult a qualified official before wiring the system.
• If the 4-20 mA signal is not used, connect a jumper between the 4-20 terminal
and the Common terminal.
• The use of shielded cable is highly recommended for signal, input, output and
power wires to protect against interference caused by extraneous electrical or
electromagnetic 'noise'.
• In applications where the wiring cable is installed in conduit, the conduit
must not be used for wiring to other electrical equipment.
• The maximum distance between the Sensor and Controller is limited by the
resistance of the connecting wiring, which is a function of the gauge of the
wire being used.
• The Controller contains semiconductor devices susceptible to damage by
electrostatic discharge. Use caution when handling. For more information on
proper ESD handling, refer to the Appendix A.
Seal
• Water-proof and explosion-proof conduit seals are recommended to prevent
water accumulation within the enclosure.
• Seals should be located as close to the device as possible and not more than
18 inches (46 cm) away.
• Explosion-proof installations may require an additional seal where conduit
enters a non-hazardous area. Ensure conformity with local wiring codes.
• When pouring a seal, use a fibre dam to assure proper formation of the seal.
Seals should never be poured at temperatures below freezing.
• The jacket and shielding of the cable should be stripped back to permit the
seal to form around the individual wires. This will prevent air, gas and water
leakage through the inside of the shield and into the enclosure.
• It is recommended that explosion-proof drains and conduit breathers be used.
In some applications, alternate changes in temperature and barometric
pressure can cause 'breathing' which allows moist air to enter and circulate
inside the conduit. Joints in the conduit system are seldom tight enough to
prevent this 'breathing'.
Mount
The Controller should be mounted near eye-level and be easily accessible for
calibration and maintenance purposes. The Sensor should be placed where gas
is likely to accumulate.
To avoid water damage to electronic components, ensure the Sensor is installed
under the explosion-proof Controller. To further prevent water damage, seal
conduit at all points of entry to the Controller or junction box.
The Sensor may be installed directly to the Controller or may be mounted
separately using a junction box (see "Sensor Separation—A
R
ELAY" on page 7).
MLB-A/R-SIR100 MLB+-A/R-SIR100 4
NALOG OR
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WIRING
Terminal wiring is different for ANALOG or RELAY boards so carefully consult
the following sections for instructions specific to A
Sensor and Controller
Note: The Sensor may be factory installed to the Controller. If so, you need
only connect the Controller to the Output Terminals as applicable.
1. Remove the Housing cover.
2. Connect the coloured Sensor wires to the Sensor Terminals (if necessary) and the Output Terminals as necessary.
Table 1: Terminal Definitions- ANALOG
Sensor Terminals Output Terminals
Sensor Wire Marked Function Marked Function
White Wht+ +24V RST Remote Reset
Blue Blu A +24V + Power
Red Red B COM - Power
Black Blk Comm 4-20
Green Shld Earth Ground ISO +24V isolated
Note: For Sensor Separation instructions, see Figure 5, "Sensor Separation—
A
NALOG or RELAY", on page 7.
3. Replace the Housing cover and restore power to the unit.
4. Ensure the S tatus LED is Red, Slow Flash and the meter reads 3 mA. This is the start-up delay sequence which will last approximately 90 seconds.
Connecting Wires
NALOG or RELAY boards.
Current loop
output
Figure 3: Wiring Controller and Sensor—A
Output Terminals —
refer to Table 1 for
definitions
WARNING:
Terminator Jumper MUST
remain in the 1 & 2 position
as shown
NALOG
Sensor Terminals —
refer to Table 1 for
definitions
Ground
SIR100 Sensor
1. Use a small screw driver to gently press down and hold the spring connector open.
2. Insert appropriate wire into open connector hole.
3. Release screw driver to secure wire.
MLB-A/R-SIR100 MLB+-A/R-SIR100 5
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Figure 4: Wiring Controller and Sensor—RELAY
Output Terminals —
refer to Table 3 for
definitions
Sensor Terminals —
refer to Table 2 for
definitions
Ground
Table 2: Sensor Terminals—RELAY
Sensor Terminals
Sensor Wire Marked Function
White Wht+ +24V
Blue Blu A
Red Red B
Black Blk Comm
Green Shld Earth Ground
Table 3: Output Terminals—RELAY
Output Terminals
RST Remote Reset
+24V + Power
COM - Power
Power Signal
24 V dc
NC Normally Closed
Fault RelaysCOM Common
NO Normally Closed
NC Normally Closed
Alarm RelaysCOM Common
NO Normally Closed
WARNING:
SIR100 Sensor
MLB-A/R-SIR100 MLB+-A/R-SIR100 6
Terminator Jumper
MUST remain in the 1
& 2 position as shown
Net Safety Monitoring Inc.
Sensor Separation—ANALOG OR RELAY
As 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. The Sensor separation kit is composed of a junction box and terminal strip. Refer to Option 1, Figure 1, "Locat e Sensor/Controller", on page 2 for an
example.
Shielded copper instrument wire (minimum 18 AWG) should be used for separations up to 1000 feet. Shielded copper instrument wire (minimum 16 AWG) should
be used for separations up to 2000 feet. Contact Net Safety if separation above 2000 feet is required.
Ensure that the appropriate wire is used for Class 1/Division 1, hazardous applications.
Figure 5: Sensor Separation
—ANALOG or RELAY
1 2 3 4
ON
OFF
Switch 1
SIR100 Sensor Junction Box (spring connector)
White wire +24V
Blue wire A
Red wire B
Black wire Comm
Junction Box (screw connector) Millennium Basic
+24V Wht+
ABlu
BRed
Comm Blk
Ground
SIR100 Sensor
Green wire Earth Ground
MLB-A/R-SIR100 MLB+-A/R-SIR100 7
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SET UP
Figure 6: Set Up—ANALOG
Jumper—Position Jumper (shorting jack) over pins to set the
power source for current output.
Position 3 & 2 = Non-isolated (default)
Note: Terminator Jumper
MUST remain in the 1 & 2
position
Position 2 & 1 = Isolated
Refer to "Current Output" on page 8.
Test Jacks—Insert standard
current meter probes to
measure current loop
Refer to Table 4, “Current Loop
Measurement,” on page 8.
DIP Switch 1—
Use DIP Switch 1 Only.
Refer to Table 5 for DIP Switch 1
settings.
Move switch to ON or OFF position to
set applicable gases.
ANALOG
Current Loop Measurement (Test Jacks)
Use a standard meter to measure current loop during various states. The
Housing cover must be removed to access the Test Jacks.
Table 4: Current Loop Measurement
State Current State Current
Calibrate Sensor 3 mA Apply 50% span
3.3 mA
calibration gas
Start-up delay 3 mA Span is set, remove
3.6 mA
gas
White sensor lead open 2.5 mA Normal 4 mA
Black sensor lead open 2.5 mA Gas present >4.0-20.00 mA
Red sensor lead open 2.5 mA Calibration failure 3.0 to 3.3 mA
Auto zero set 3 mA
DIP SWITCHES
Set DIP Switch—ANALOG
Set DIP Switch 1, Position 1 to ON or OFF to determine which gas the unit
detects.
Note: Use only DIP Switch 1, Position 1 with an Analog board.
Table 5: DIP Switch 1 Settings—A
NALOG
DIP Switch 1
Current Output
T o set an isolated current output, simply move the Jumper (shorting jack) to the
isolated or non-isolated current position (refer to Figure 6, "Set Up—
A
NALOG").
Position 1 Gas
ON Propane
OFF Methane
Isolated = position 1 and 2
Non-Isolated = position 2 and 3
Note: Unless otherwise specified, all models ship with non-Isolated as the
default.
MLB-A/R-SIR100 MLB+-A/R-SIR100 8
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Set Dip Switch—RELAY
Set DIP Switch 1, Position 1 to ON or OFF to determine which gas the unit
detects and DIP Switch 1, Position 2 and 3 to define relay contacts.
Position 4, DIP Switch 1 and all positions on DIP Switch 2 are assigned a value
to a combined maximum of 62 (the OFF setting for these positions always
equates to 0). Any values set on these switches are added together to set the
Alarm Level point value (refer to Table 6).
Figure 7: Set Up—R
ELAY
DIP Switches—
Both Switch 1 and 2 are
used.
Refer to Table 6 for DIP
Switch and position
settings.
Move DIP switch to ON or OFF
positions to set.
DIP Switch 1
DIP Switch 2
RELAY
Table 6: DIP Switch 1 and 2 Settings—RELAY
DIP Switch 1
Setting Function
ON Propane
Position 1
Defines gas
OFF Methane
ON Energized
Position 2
OFF
Deenergized
Defines Relay Coil status
ON Latching
Position 3
OFF
NonLatching
Defines Relay Latch status
ON 32% Used with DIP Switch 1, position
Position 4
OFF 0
4 to set the Alarm Point (% of
full scale)*
DIP Switch 2
Setting Function
ON 16%
Position 1
OFF 0
Position 2
OFF 0
Used with DIP Switch 1, position
4 to set the Alarm Level point
ON 8%
Terminator Jumper MUST
remain in the 1 & 2 position as
shown
Position 3
ON 4%
OFF 0
ON 2%
value (% of full scale)*
Position 4
OFF 0
MLB-A/R-SIR100 MLB+-A/R-SIR100 9
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STEP 4 — OPERATE
ANALOG AND RELAY
The following functionality is common for both Analog and Relay boards.
Note: A number of functions, specific to Analog or Relay boards, have been
discussed previously.
Figure 8: Controller Functionality
Status LED
(Red/Green)
Green Power LED
Table 7: State LEDs
STATUS LED
State Current O/P RED or GREEN
Calibrate Sensor 3 mA N/A N/A
Start-up delay 3 mA Slow flash
White sensor lead open 2.5 mA Fast Flash
Black sensor lead open 2.5 mA Fast Flash
Red sensor lead open 2.5 mA Fast Flash
Auto zero set 3 mA Solid
Apply calibration gas 3.3 mA Fast Flash
Span is set, remove gas 3.6 mA Solid
Normal 4 mA Blip/ Blink
Gas present >4.0 - 20.00 mA Blip/ Blink
Calibration failure 3.0 to 3.3 mA Flash Flash
CALIBRATION SWITCH
The Calibration Switch allows for a 1-man, intrusive calibration. As the
Controller’s housing must be open to access the switch, the area must be declassified before using.
Press and hold the Calibration Switch to calibrate and monitor. Refer to the
Calibration Switch
switch (refer to "Calibration
Switch" on page 10).
—Intrusive
DIP Switch 1 and DIP Switch 2
"Set DIP Switch—A
"Set Dip Switch—R
details.
NALOG" on page 8 and
ELAY" on page 9 fo r
—Refer to
LEDs and the current meter readings to determine status.
POWER UP
When power is first applied, a 90 second warm-up routine will begin. Durin g
this time, output will be 3.0 mA and the Status LED will flash slow red.
When power is applied, the system is automatically tested to ensure proper
functionality.
After warm-up, the Controller will enter normal operation (clear) mode, the
analog output will change to 4.0 mA and the Status LED will blip/blink green.
MLB-A/R-SIR100 MLB+-A/R-SIR100 10
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M
STEP 5 — CALIBRATE
CALIBRATE SENSOR
WARNING: The calibration procedure requires about 5 minutes to complete. If gas is not applied at the appropriate time, a calibration failure may occur (refer to
"Calibration Failure" on page 12 for specific information).
Recommendation: Power up the unit for at least 4 hours BEFORE first calibration.
For proper performance, the Millennium should be calibrated using 50% full scale of the specific gas of concern. The concentration of gas, corresponding to 100%
of full scale, is converted to a linear 4 to 20 mA output signal which can be powered from the primary DC supply of the instrument.
The following calibration procedure should be followed to ensure an accurate correlation between the 4 to 20 mA output signal and the gas concentration.
Calibration Procedure
Note: Ensure area has been de-classified prior to calibrating.
1. Confirm successful power up of Controller
—LED green blip/blink every 2 seconds; no fault indicated.
2. Connect a standard current meter to the Controller’s Test Jacks.
3. Press and hold the Calibration Switch for 10-15 seconds.
4. When 3 mA displays and Status LED is green solid, apply zero gas (clean air).
Recommendation: Flow certified ZERO AIR at a rate of 1.0 litres per minute through the side calibration fitting, when using the calibration cup (if separated or
not using the calibration cup, a rate of 3.0 litres per minute is recommended).
5. When 3.3 mA displays, apply specific gas (50% of full span). During gas application, LED will fast flash red.
6. When 3.6 mA displays and LED solid green, remove gas.
7. Apply zero gas (clean air) again to purge system.
8. Controller will return to normal operation.
Note: Always apply test gas after calibration to verify operation.
Figure 9: Calibration Procedure
eter Reads
Action
Status LED
4 mA
Power ON
Normal
Green blip/blink
Connect meter
Press
Calibration Switch
10-15 seconds
3 mA
Zero gas
(clean air)
Green solid
3.3 mA
Specific gas
50% full span
Red flash
3.6 mA
Remove gas
Green solid
Purge
System
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Calibration Failure
If the calibration procedure fails, the Status LED alternates red and green
flashes and the analog output changes back and forth from 3.0 to 3.3 mA.
The unit remains in a failed state until manually reset.
Manual Reset
A Manual Reset is required after a calibration failure or to clear an alarm.
Simply press and hold the Calibration Switch for 3-5 seconds. The unit will
return to the normal operation using previous calibration values.
STEP 6 — MONITOR
SENSOR FAULT
WARNING: The fault detection circuitry does not monitor the operation of
external response equipment or the external wiring of such devices. It is
important that these devices are checked periodically to ensure proper
operation.
To ensure proper response, the Millennium features self-testing circuitry that
continuously checks for problems. When power is applied, the system
automatically begins a test to ensure proper functionality.
During normal operation, it continuously monitors the signal from the internal
sensor source. In addition, a "watchdog" timer is maintained to ensure the
program is running correctly. When a system fault is detected, the Status LED
flashes fast red and current output displays 2.5 mA.
SENSOR LIFE
Depending on various factors, sensor response may slowly deteriorate over a
period of years. If calibration becomes impossible for any reason, the analog
output will switch repeatedly between 3.0 mA and 3.3 mA and the red and green
LEDs flash.
Install a new SIR100 Sensor and re-calibrate. The calibration function
automatically adjusts span amplifier gain across a broad range without any need
for manual adjustment of potentiometers or jumpers.
NORMAL
With no gas present and no fault detected, green LED will blip/blink and anal og
output will display as 4.0 mA.
OUTPUT
Current
A 4-20 mA DC current output is used to transmit the alarm status and fault
codes to other devices. This output can be wired for isolated or non-isolated
operation.
A 4.0 mA output indicates normal operation; a >4.0 - 20.0 mA output indicates
the presence of gas.
Current output of 2.5 mA indicates the presence of a system fault; 3.0 to
3.3 mA indicates calibration failure.
Relay
Refer to Appendix C, "Specifications" on page 16 for detailed information.
STEP 7 — MAINTAIN
Net Safety Monitoring recommends a response check every 3 months. This
involves the application of calibration gas to the sensor, then the observation of
the response LEDs, analog output, and external monitoring equipment. Be sure
to prevent unwanted response of external monitoring devices and equipment
during this procedure. If the Millennium response to calibration gas is within the
specified accuracy then it is not necessary to perform a calibration. For
example, when 50% of full scale is applied, the response is expected to be
between 11.5 mA (47% of full scale) and 12.5 mA (53% of full scale). An
additional consideration is the accuracy tolerance of the calibration gas which
may be + or - a few percent. If the calibration gas is + or - 10% of full scale then
the reading may be from 10.7 mA (42% of full scale) to 13.3 mA (58% of full
scale).
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Net Safety Monitoring Inc.
TROUBLESHOOT
Response to the input should be checked and, if necessary, calibration should be
performed whenever any of the following occur.
• Sensor or transmitter supplying a signal to the Millennium is added or
removed
The Millennium is not designed to be repaired in the field. If a problem should
develop, first calibrate the device and carefully check for faulty wiring. If it is
determined that the problem is caused by an electronic defect, the device must
be returned to the factory for repair.
HOW TO RETURN EQUIPMENT
A Material Return Authorization number is required in order to return
equipment. Please contact Net Safety Monitoring at (403) 219-0688
returning equipment or consult our Service Department to possibly avoid
returning equipment.
If you are required to return equipment, include the following information:
1. A Material Return Authorization number (provided over the phone to you by Net Safety).
2. A detailed description of the problem. The more specific you are regarding the problem, the quicker our Service department can determine and correct the problem.
3. A company name, contact name and telephone number.
4. A Purchase Order, from your company, authorizing repairs or request for quote.
5. Ship all equipment, prepaid to:
Net Safety Monitoring Inc
2721 Hopewell Place NE
Calgary , Alberta, Canada
T1Y 7J7
6. Mark all packages: RETURN for REPAIR
before
Waybills, for shipments from outside Canada, must state:
Equipment being returned for repair
All charges to be billed to the sender
Also, please ensure a duplicate copy of the packing slip is enclosed inside the
box indicating item 1-4 along with the courier and account number for returning
the goods.
All Equipment must be Shipped prepaid. Collect shipments will not be
accepted.
Pack items to protect them from damage and use anti-static bags or aluminumbacked cardboard as protection from electrostatic discharge.
MLB-A/R-SIR100 MLB+-A/R-SIR100 13
Net Safety Monitoring Inc
SPARE PARTS/ACCESSORIES
Table 8: Part Numbering
Description Net Safety Part Number
Separation Kit JB-D
Appendix A:
E
LECTROSTATIC SENSITIVE DEVICE (ESD)
Electrostatic discharge (ESD) is the transfer, between bodies, of an electrostatic
charge caused by direct contact or induced by an electrostatic field.
The most common cause of ESD is physical contact. Touching an object can
cause a discharge of electrostatic energy
occurs near electronic components, it can damage or destroy those components.
In some cases, damage is instantaneous and an immediate malfunction occurs.
However, symptoms are not always immediate
or seemingly normal for an indefinite period of time, followed by a sudden
failure.
To eliminate potential ESD damage, review the following guidelines:
• Handle boards by metal shields
components
• Wear grounded wrist or foot straps, or ESD shoes or heel grounders to
dissipate unwanted static energy
• Prior to handling boards, dispel any charge in your body or equipment
• Enure components are transported and stored in static safe packaging
• When returning boards, carefully package in the original carton and static
protective wrapping
• Ensure ALL personnel are educated and trained in ESD Control Procedures
In general, exercise accepted and proven precautions normally observed when
handling electrostatic sensitive devices.
—ESD! If the charge is sufficient and
—performance may be marg inal
—taking care not to touch electronic
A warning label is placed on the packaging, identifying product using
electrostatic sensitive semiconductor devices.
MLB-A/R-SIR100 MLB+-A/R-SIR100 14
Net Safety Monitoring Inc.
Appendix B: RESISTANCE TABLE
Distance (Feet) AWG #20 AWG #18 AWG #16 AWG #14 AWG #12 AWG #10 AWG #8
100 1.020.640.400.250.160.100.06
200 2.031.280.800.510.320.200.13
300 3.051.921.200.760.480.300.19
400 4.062.551.611.010.640.400.25
500 5.083.202.011.260.790.500.31
600 6.093.832.411.520.950.600.38
700 7.11 4.47 2.81 1.77 1.11 0.70 0.44
800 8.12 5.11 3.21 2.02 1.27 0.80 0.50
900 9.145.753.612.271.430.900.57
1000 10.20 6.39 4.02 2.53 1.59 1.09 0.63
1250 12.70 7.99 5.03 3.16 1.99 1.25 0.79
1500 15.20 9.58 6.02 3.79 2.38 1.50 0.94
1750 17.80 11.20 7.03 4.42 2.78 1.75 1.10
2000 20.30 12.80 8.03 5.05 3.18 2.00 1.26
2250 22.80 14.40 9.03 5.68 3.57 2.25 1.41
2500 25.40 16.00 10.00 6.31 3.97 2.50 1.57
3000 30.50 19.20 12.00 7.58 4.76 3.00 1.88
3500 35.50 22.40 14.10 8.84 5.56 3.50 2.21
4000 40.60 25.50 16.10 10.00 6.35 4.00 2.51
4500 45.70 28.70 18.10 11.40 7.15 4.50 2.82
5000 50.10 32.00 20.10 12.60 7.94 5.00 3.14
5500 55.80 35.10 22.10 13.91 8.73 5.50 3.46
6000 61.00 38.30 24.10 15.20 9.53 6.00 3.77
6500 66.00 41.50 26.10 16.40 10.30 6.50 4.08
7000 71.10 44.70 28.10 17.70 11.10 7.00 4.40
7500 76.10 47.90 30.10 19.00 12.00 7.49 4.71
8000 81.20 51.10 23.10 20.20 12.70 7.99 5.03
9000 91.40 57.50 36.10 22.70 14.30 8.99 5.65
10 000 102.00 63.90 40.20 25 .30 15.90 9.99 6.28
Note: Resistance shown is one way. This figure should be doubled when determining closed loop resistance.
MLB-A/R-SIR100 MLB+-A/R-SIR100 15
Net Safety Monitoring Inc.
Appendix C: SPECIFICATIONS
Sensor (SIR100) Specifications
• Operating Temperature Range: -40°C to +75°C (-40F to +167F)
• Enclosure Material: Powder Coated or Anodized Aluminum (optional stainless steel)
• Range of Detection: 0 to100% LEL methane/propane
• Accuracy: +/- 3% LEL up to 50% LEL
• Response Time: <30 seconds to T90
• Linearity/Repeatability: +/- 3% LEL / +/- 2% LEL
• Certification: CSA and NRTL/C certified for hazardous locations. Class I, Division 1, Groups B, C and D, NEMA 4X and 7.
IEC Rating Exd IIB+H2T5
Controller Specifications
MILLENNIUM Basic 4-20 mA ANALOG OUTPUT RELAY OUTPUT
Operating Temperature -40°C to +75°C (-40F to +167F)5
Power Consumption
(at 24 V dc)
Humidity Range 0 to 100% relative humidity, non-condensing
Operating Voltage 10.5 to 32.0 V dc when measured at controller
Enclosure Material Copper Free Cast Aluminum
Certifications: CSA and NRTL/C certified for hazardous locations. Class I, Division 1, Groups C and D, NEMA 4 and 7. IEC Rating Ex d
Weight (with SIR100) 4 lbs
Current Output
Relay Output Form C contacts rated 5 Amps @ 30 V dc / 250 V ac. Selectable
MLB-A/R-SIR100 MLB+-A/R-SIR100 16
Nominal (100 mA, 2.40 W)
Maximum (110 mA, 2.64 W)
II B T5.
NOTE: Electronics only - CSA and NRTL/C certified for hazardous locations Class I, Division 2 Groups A, B, C and D.
4 to 20 mA - Into a maximum loop impedance of 800
Ohms at 32 V dc or 150 Ohms at 10.5 V dc. Isolated or
non-isolated loop supply.
energized/de-energized, latching/non-latching Alarm and Faults
relays. Normally open and normally closed contacts available at
the output terminals.
N
2
C
T
E
w
Distributed by:
ww.netsafety.com
-mail: netsafe@net-safety.com
elephone: (403) 219-0688 Fax: (403) 219-0694
algary, Alberta, Canada T1Y 7J7
721 Hopewell Place NE
et Safety Monitoring Inc.,
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