G.O.L.D.
GAS OPERATIONS LEAK DETECTION
USER MANUAL
Part Number: MAN-0045-00 Rev1
August 2003
Copyright © 2003 Net Safety Monitoring Inc.
Printed in Canada
This manual is provided for informational purposes only. Although the information contained in this
manual is believed to be accurate, it could include technical inaccuracies or typographical errors.
Changes are, therefore, periodically made to the information within this document and incorporated
without notice into subsequent revisions of the manual. Net Safety Monitoring Inc. assumes no
responsibility for any errors that may be contained within this manual.
This manual is a guide for the use of a Combustible Gas Detector and the data and procedures
contained within this document have been verified and are believed to be adequate for the intended use
of the detector. If the detector 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.
Net Safety Monitoring Inc., warrants this sensor and detector against defective parts and workmanship
for a period of one year from date of purchase * and other electronic assemblies for one year 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 and an authorized distributor for details.
* Pro-rated warranty on sensor, please consult factory.
Table of Contents
Chapter 1 Introduction ...................................................1
Description ............................................................................ 1
Features .............................................................................. 1
G.O.L.D. Quick Reference Guide........................................................... 2
Figure 1 G.O.L.D. Quick Reference Guide ............................................. 2
Table 1 LED Guide ............................................................... 2
Chapter 2 Installation and Start Up ........................................3
What’s in the package ................................................................... 3
Location of Sensor(s) .................................................................... 3
Figure 2 G.O.L.D. Installation Diagram .............................................. 4
Figure 3 G.O.L.D. Dimensional Diagram ............................................. 5
G.O.L.D. Wiring ........................................................................ 6
Figure 4 G.O.L.D. Wiring Diagram .................................................. 6
Installation Checklist..................................................................... 8
Periodic Response Test ........................................................... 8
Sensor Poisons and Inhibitors....................................................... 8
Chapter 3 Operation ....................................................8
Start Delay ............................................................................ 8
Detector Status/Fault.............................................................. 9
Power Down Reset ............................................................... 9
Hardware ............................................................................. 9
Reset Button .................................................................... 9
Visual Indicators (Light Emitting Diodes)............................................... 9
Out pu ts ........................................................................ 9
Relays ........................................................................ 9
Bump Test Procedure .................................................................. 10
Table 2 Bump Test Procedure ..................................................... 10
Chapter 4 Troubleshooting ..............................................10
Appendix A ...........................................................11
Technical Specifications ................................................................. 11
Appendix B ...........................................................12
Electrostatic Sensitive Device Handling Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Appendix C ...........................................................13
Wire Resistance in Ohms................................................................ 13
Chapter 1 Introduction
Description
The G.O.L.D. LEL gas detector is designed for Gas production Operations Leak Detection,
where the cost of conventional LEL gas detectors is considered excessive. G.O.L.D.
responds to industry demand for a low power, reliable and economical gas leak detector
suitable for regulatory compliance and enhanced safety.
G.O.L.D. utilizes a pre-calibrated pellistor sensor communicating digitally over a 3-wire
cable to a micro- processor based controller, optimized for 12 or 24 Vdc solar systems.
Over the one year life of the sensor, conventional periodic zero and span calibration is not
normally required although periodic "bump testing" with calibration gas is strongly
recommended to verify operation and to confirm external alarm circuits. Expired G.O.L.D.
sensors are easily replaced with factory pre-calibrated sensors at a fraction of the cost of
conventional catalytic LEL sensors.
A normally closed, fail-safe, solid-state alarm relay is set to trip and latch when the
combustible gas level exceeds the alarm set point. Faults identified through
self-diagnostics trip a similar relay and both can be remotely or locally reset.
Features
* LED status indication
* Conventional Zero and Span calibration not required
* SensorGuard protects pellistor from extreme levels of gas and extends sensor life
* Sensor can be remotely mounted up to 50 feet from the module
* Fault and Alarm solid state relay outputs
* Temperature compensated circuitry
1
G.O.L.D. Quick Reference Guide
This information will give you a quick
explanation of the various parts of the
G.O.L.D. Detector.
Status/Fault LED: Indicates the status
or the fault condition of the detector.
Alarm LED: Indicates if the detector is in
a gas alarm state.
Reset: Is used to reset the detector.
LEL Sensor: Combustible Gas sensor.
Figure 1 G.O.L.D. Quick Reference Guide
Table 1 LED Guide
CONDITION Status / Fault LED Alarm LED
Sensor is in the initial start-up sequence Red Slow Flash Red Solid
Normal Operation (No gas present) Green Blip OFF
Sensor is in a fault condition Red Slow Flash OFF
Achieved > 1% LEL Red Blip OFF
Achieved 20% LEL Red Blip Red Solid
2
Chapter 2 Installation and Start Up
What’s in the package
Carefully remove all the components from the packing box(s). Check components against the packing
list. Inspect all components for obvious damage. Notify the carrier and distributor immediately if damage
is found or parts are missing.
Location of Sensor(s)
There are no absolute rules for determining the quantity and location of gas detection instruments within
a particular facility. Care should be taken to locate the sensors in areas where gas escape may be
expected and where it is desirable to detect the presence of unwanted gas. Use redundancy where
enhanced protection or reliability is desired. Use common sense and refer to various publications that
discuss general guidelines for your industry.
The following factors are important and should be considered for every installation:
- Exposure to excessive heat or vibration can cause premature failure of electronic devices and should be avoided if
possible. Shielding electronic devices from intense sunlight and direct radiant heat can increase their life.
- The G.O.L.D. sensor should always face downward.
- The G.O.L.D. sensor should be mounted where gasses are expected. For gasses that are lighter than air (Methane,
Ethane, Hydrogen) placement should consider that these gases will tend to rise. For gasses that are heavier than air
(Toluene, Hexane, Acetone, Butane, Propane, Pentane, Acetone) placement should consider that these gases will tend
to fall.
- If both heavy and light gasses are present in a process area, then sensors should be installed to detect both heavy and
light gasses.
- Air flow patterns due to convection and ventilating fans or louvers should also be considered in locating sensors.
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