Ampcontrol DIESELGUARD User manual

Version: 3, April 2016
Designed and manufactured in Australia by Ampcontrol Pty Ltd
DIESELGUARD
DIESELMACHINEMONITOR
UserManual

Ampcontrol Pty Ltd –ABN 28 000 915 542
DIESELGUARD USER MANUAL
MAG-179 Version 3 –APR/16
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Revision History
Version
Date
Description
3
29-APR-2016
This version of the manual relates to firmware version
V5 of the Dieselguard.
WARNING!
The warning symbol highlights a potential risk of injury or death.
Please share these warnings with other operators.
CAUTION!
The caution symbol highlights a potential risk of damage to
equipment.
Please share these cautions with other operators.
NOTE
The note symbol highlights key information.
Please share these notes with other operators.
ENVIRO
The enviro (environmental) symbol highlights areas which may have an
impact on the surrounding fauna and/or flora.

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Copyright Notice
The Ampcontrol Dieselguard System described in this document is the property of AMPCONTROL PTY
LTD. It is furnished under a license agreement and is to be used only in accordance with the terms of the
agreement.
No part of the hardware or documentation may be reproduced, transmitted, transcribed, stored in a
retrieval system, or translated into any language or computer language, in any form or by any means,
without prior written permission of AMPCONTROL PTY LTD.
Disclaimer
While every effort has been made to assure the accuracy and clarity of this document, AMPCONTROL
PTY LTD assumes no liability resulting from any omissions in this document, or from misuse of the
information obtained herein. The information in this document has been carefully checked and is
believed to be entirely reliable with all of the necessary information included. AMPCONTROL PTY LTD
reserves the right to make changes to any products described herein to improve reliability, function, or
design, and reserves the right to revise this document and make changes from time to time in content
hereof with no obligation to notify any persons of revisions or changes. AMPCONTROL PTY LTD does
not assume any liability arising out of the application or any use of any product or circuit described
herein; neither does it convey license under its patent rights or the rights of others.
Before You Begin
Thank you for purchasing the Ampcontrol Dieselguard System.
WARNING!
This equipment has been designed to control the signals from
equipment that detects hazardous gases and vapours and to provide
warning and control signals before dangerous conditions are reached.
In order to ensure that the equipment will warn of dangerous situations
it is essential that the instructions in this manual and those of the
associated items be read, understood and followed. It is further
stressed that the effectiveness of the control system depends heavily
on the user who is responsible for its correct installation, application,
use and regular maintenance.
Ampcontrol Contact Details
7 Billbrooke Close, Cameron Park, NSW, 2285
P [phone] | F [phone]
EMAIL: [e-mail]
WEB: ampcontrolgroup.com

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TABLE OF CONTENTS
1 SAFETY AND OTHER WARNINGS..................................................................6
1.1 Safe Use of Equipment..............................................................................6
2 RECEIVING AND STORAGE............................................................................7
2.1 Receiving...................................................................................................7
2.2 Inspection..................................................................................................7
2.3 Storage after Delivery................................................................................7
2.4 Unpacking of Equipment............................................................................7
3 PRODUCT OVERVIEW ....................................................................................8
3.1 Diesel Machine Monitor .............................................................................8
3.2 Diesel Machine Monitor Wireless Antenna.................................................9
3.3 Gasguard Transmitter / CH4 Sensor........................................................10
3.4 IDA Display (Optional) .............................................................................10
3.5 I.S. Solenoid Valve ..................................................................................11
3.6 Pneumatic Bypass Assembly (c/w I.S. Solenoid Valve) ...........................11
4 INSTALLATION...............................................................................................12
4.1 General Warnings....................................................................................12
4.2 Mandatory Installation Practices..............................................................12
4.3 Mechanical Installation Information..........................................................14
4.4 Electrical Installation Information .............................................................16
5 COMMISSIONING AND CALIBRATION .........................................................20
5.1 Gasguard Sensor Calibration...................................................................20
5.2 Commissioning of the Dieselguard System..............................................20
6 PRODUCT OPERATION.................................................................................21
6.1 Start Sequence........................................................................................21
6.2 Machine Running.....................................................................................21
6.3 Optional Alarm Functions.........................................................................21
6.4 Deputy Override.......................................................................................21
6.5 Cold Start Function..................................................................................22
6.6 Charge Indication.....................................................................................22
7 SERVICE, MAINTENANCE & DISPOSAL.......................................................23
7.1 Equipment Service...................................................................................23
7.2 Equipment Maintenance..........................................................................24
7.3 Disposal...................................................................................................24
8 SPECIFICATIONS ..........................................................................................25
9 EQUIPMENT LIST ..........................................................................................27

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TABLE OF FIGURES
Figure 3.1: Diesel Machine Monitor......................................................................8
Figure 3.2: Gasguard Transmitter with Integrated CH4 Sensor..........................10
Figure 3.3: IDA Display ......................................................................................10
Figure 3.4: I.S. Solenoid Valve...........................................................................11
Figure 3.5: Pneumatic Bypass Assembly ...........................................................11
Figure 4.1: Diesel Machine Monitor Dimensions.................................................14
Figure 4.2: Mounting Hole Locations..................................................................14
Figure 4.3: Terminal Layout for Diesel Machine Monitor.....................................15
Figure 4.4: Isometric View of Diesel Machine Monitor’s Terminal Block .............15
Figure 4.5: Typical Connection Diagram for the Dieselguard System.................16
Figure 4.6: Location of the Earth Stud on Diesel Machine Monitor .....................17

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1 SAFETY AND OTHER WARNINGS
For safety reasons, the Dieselguard System must be installed, operated and serviced only by competent
personnel. Please read and understand this instruction manual completely before installing, operating or
servicing this equipment. Failure to install or operate this instrument in accordance with the instructions
contained in this manual may create hazardous operating conditions.
1.1 Safe Use of Equipment
The equipment supplied has been designed and manufactured to ensure safe operation. The equipment
must only be used within the design parameters.
The instructions within this manual must be observed as an aid towards achieving the safest possible
installation.
Persons responsible for installation, maintenance, or operation, must observe the following
instructions:
1.1.1 Changes to Equipment
Changes in the design and modifications to the equipment are not permitted. Unauthorised changes
made to the hardware or operating firmware will void the manufacturer's warranty, and may
compromise the integrity of the system into which it is installed and other connected equipment.
1.1.2 Equipment Knowledge
Experience with, or understanding of, this equipment is essential for the safe installation and removal of
the equipment. Therefore, please read and understand this manual prior to use. Competency based
training courses are recommended and are available on request.
1.1.3 Manual Handling
Precautions have been taken to ensure all equipment is safe to handle and free from sharp edges.
However care should always be taken when handling enclosures and gloves should be worn.
1.1.4 Installation
Correct operation and safety depend on the Dieselguard System and associated equipment being
installed correctly. Mechanical and or electrical installation and maintenance of plant and equipment
must only be carried out by appropriately qualified personnel and must be tested thoroughly prior to
operation.
1.1.5 Operation
As safety depends on the Dieselguard System functioning correctly it is highly recommended that all
safety functions of the Dieselguard System be periodically tested to ensure correct operation.

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2 RECEIVING AND STORAGE
2.1 Receiving
All possible precautions are taken to protect the equipment against damage or losses during shipment,
however before accepting delivery, check all items against the packing list or bill of loading. If there is
evidence of physical damage, notify Ampcontrol immediately.
Notify Ampcontrol immediately in case of any discrepancies to the packing list. Keep a record of any
claims and correspondence. Photographs are recommended.
Where practicable do not remove protective covers prior to installation unless there are indications of
damage. Boxes opened for inspection and inventory should be carefully repacked to ensure protection of
the contents or else the parts should be packaged and stored in a safe place. Examine all packing
boxes, wrappings and covers for items attached to them, retain and store any approval documentation
for your safety file as applicable prior to wrapping being discarded.
2.2 Inspection
Equipment that is found to be damaged or has been modified away from its published specification must
not be used. Please contact Ampcontrol if the equipment is suspected to be different than that ordered or
if it does not match the published specifications.
2.3 Storage after Delivery
When the equipment is not to be installed immediately, proper storage is important to ensure protection
of equipment and validity of warranty.
All equipment should be stored indoors between 0-40˚C, preferably on shelves and protected from
moisture and sunlight.
In order to maximise the lifespan of the battery installed in the Dieselguard unit, it is recommended that
the Dieselguard be connected to a power supply during extended storage periods.
2.4 Unpacking of Equipment
The method of packing used will depend on the size and quantity of the equipment. The following
cautions should be interpreted as appropriate.
CAUTION!
Take care when unpacking crates as the
contents may have shifted during transport.
ENVIRO
The disposal of packaging materials, replaced parts, or components
must comply with environmental restrictions without polluting the soil,
air or water.
Ensure that any timber and cardboard used as packaging is disposed
of in a safe and environmentally responsible manner.
Where possible, dispose of all waste products i.e. oils, metals, plastic
and rubber products by using an approved recycling service centre.

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3 PRODUCT OVERVIEW
The Dieselguard System monitors ambient gas levels (methane for a standard installation) and provides
indication and control based upon the measured gas levels. The system prevents unsafe starting of a
machine in the presence of dangerous levels of explosive gas. Similarly, if a machine is running, the
Dieselguard System will shut the machine down if surrounding gas levels rise above the set alarm point.
This prevents continuing unsafe operation of a machine in a potentially dangerous atmosphere.
Key Features
Gas monitoring and control functionality
IP66 stainless steel enclosure
Ex ‘m’ ia certified product
Powered from machine’s alternator
CH4 transmitters with integrated or remote sensor heads
Standard external control enclosures available
Intrinsically safe solenoid valve
3.1 Diesel Machine Monitor
Figure 3.1: Diesel Machine Monitor
The Ampcontrol Dieselguard Machine Monitor is the central connection point for the Dieselguard system,
which comprises of external sensors, external display, control box and the I.S. solenoid valve. The
Ampcontrol Dieselguard Machine Monitor is housed in a low-profile IP66 stainless steel enclosure, with
all internal electronics being encapsulated.
The Diesel Machine Monitor is an Exm ia certified product that is powered from the alternator supply of
the vehicle. Apart from the supply power all other connection to the Dieselguard Control unit are Ex ia
Intrinsically Safe (IS) circuits.
The Diesel Machine Monitor provides the control via a solenoid incorporated into the diesel machine’s
safety pressure circuit. When released the solenoid allows the system to de-pressurise and as a result,
shut down the machine
Input power is provided via the integral encapsulated cable and is not polarity sensitive. The input
circuitry has been designed to withstand a wide variety of ‘dirty’ power supply types. Many alternators
provide power that has a high level of ripple and high voltage noise spikes. The Dieselguard Diesel
Machine Monitor is designed to withstand these conditions without operational problems. The unit will
withstand a 90V repetitive overload condition via its internal auto-reset protection barrier. The input
power supply circuitry is galvanically isolated from the rest of the system.
The unit is designed as a component approved device and can be used with Intrinsically Safe and

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“simple apparatus” accessories provided that the entity requirements are adhered to. Accessories for the
Dieselguard System include: Gas transmitters, RTD’s, Pressure and level switches, LED indicators,
Solenoid valves and Intrinsically Safe display systems.
The Diesel Machine Monitor is pre-configured to detect Methane gas around the vehicle and to provide a
normally energised solenoid supply which will de-energise and hence de-pressurise the vehicle safety
loop (diesel supply valve) in event of high gas readings. The warning signal is pre-set at 1.00% and the
trip function is pre-set to de-energise the solenoid at 1.25% CH4 (as per the requirements of AS/NZS
4871.6:2013 Section 6.4.4).
The Dieselguard Machine Monitor is equipped with wireless capability that allows the user to connect to
the unit, through the use of the Dieselguard Base Station, and configure alarm trip points, provide real
time status information and download logged data.
The Diesel Machine Monitor is designed not to need regular maintenance or access, as such, once fitted
to the machine it does not need to be accessed.
3.2 Diesel Machine Monitor Wireless Antenna
In order for the Diesel Machine Monitor to communicate with the Dieselguard Base Station, it is
necessary to mount the small whip antenna to the vehicle. The antenna is located at the end of the free
coax cable and is protected by a rugged sheath.
When mounting the antenna, consideration should be given to keeping the actual receiving part (the last
200mm of the cable assembly) away from the metalwork of the vehicle. If the antenna is too close to the
vehicle, then the useable range may be reduced. Ideally, the antenna should be mounted in the same
orientation as the receiver.
NOTE
If the wireless capability is not required, it is not necessary to cut off
the antenna. The coaxial cable can be unplugged inside of the Diesel
Machine Monitor’s enclosure.

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3.3 Gasguard Transmitter / CH4 Sensor
Figure 3.2: Gasguard Transmitter with Integrated CH4 Sensor
The Gasguard transmitter may include an integral or remote head sensor. In either case the sensor
should be mounted pointing vertically downwards and sufficient space left around and beneath the
sensor for fitting of the calibration cup.
The front panel of the transmitter has to be accessible for calibration and service of the sensor and
should be mounted in a position to allow for the magnetic screwdrivers to be used and the reading on the
screen viewed.
It is not necessary for the transmitter to be viewed by the driver.
If the remote head sensor is used bear in mind that if the sensor needs to be replaced, easy removal and
re-installation of the cable is advantageous.
See Gasguard sensor manual for further information.
3.4 IDA Display (Optional)
Figure 3.3: IDA Display
The IDA display provides feedback to the operator of the diesel machine as to the ambient CH4 levels.
The IDA display is optional and alternative display panels using LED and other equipment can be used.
If the IDA display is used it should be mounted in a position where the driver can see it without it being in
his direct line of vision. See IDA technical datasheet for more detail.

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3.5 I.S. Solenoid Valve
Figure 3.4: I.S. Solenoid Valve
The IS Solenoid Valve is used to control the diesel machine’s pressure circuit based upon the outputs of
the Diesel Machine Monitor.
The I.S. Solenoid Valve can be mounted in any suitable location. The pneumatic connections are:
Ports 1 and 2 are normally connected when the solenoid is energised.
Ports 1 to 3 (the vent port) are connected when the valve is de-energised.
The valve should be connected so that the pressure is released from the downstream side of the valve
when de energised.
See manufacturer’s installation and maintenance sheet for additional information.
3.6 Pneumatic Bypass Assembly (c/w I.S. Solenoid Valve)
Figure 3.5: Pneumatic Bypass Assembly
The Pneumatic Bypass Assembly contains the I.S. Solenoid Valve as well as a manually operated valve.
The manually operated valve allows the operator to bypass the Dieselguard system in the event of a flat
battery in the Diesel Machine Monitor.

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4 INSTALLATION
4.1 General Warnings
These instructions have been designed to assist users of the Dieselguard System with installation.
Before the Dieselguard System can be installed, there are a number of things that need to be considered
and understood to prevent incorrect or unsafe operation of the Dieselguard System or the system into
which it is installed.
Along with relevant competence, and an understanding of the target application, the following points
should be considered:
4.1.1 Ensure that the information provided in this user manual is fully understood.
It is extremely important that the limitations and functionality of the Dieselguard System are understood
to prevent incorrect installation and use from creating a potentially dangerous risk. If in doubt as to the
nature of the limitations or their implication, consult a competent authority such as a supervisor or
Ampcontrol technical representative.
4.1.2 Ensure that the application into which the Dieselguard System is being installed
has been properly defined, designed and approved.
Any system intended to mitigate the risk of injury needs to be properly designed and implemented. Such
a system must be the result of structured risk analysis with the outcomes used to define the system
requirements. These requirements, in turn, will guide the choice of instrumentation, logic solvers and
actuators needed to implement the system. Understanding the needs of the system will ensure proper
selection of equipment.
4.1.3 Ensure that the Dieselguard System will properly perform the required functions
within the system design.
It is important to understand how the Dieselguard System is intended to interact with other equipment
within a system. For safe and reliable use, it is crucial that neither the Dieselguard System logical
operation nor its signalling be compromised by incompatibilities with connected equipment.
4.1.4 Modifications of any form to the Dieselguard System are prohibited.
The Dieselguard System as supplied has been designed and manufactured to comply with the
requirements of protection standards. If modifications of any form are made to the Dieselguard System,
the equipment may no longer be fit for use. If any modifications or damage to the Dieselguard System is
evident, do not use the equipment and contact Ampcontrol for advice.
4.2 Mandatory Installation Practices
The following information must be adhered to when installing the Dieselguard System. Failure to adhere
to this information may give rise to unsafe operation.
Using the Dieselguard System in a manner that exceeds its electrical, functional or physical
specifications, or in a way that is contrary to its operating restrictions, may create risks to personnel
and/or equipment resulting in injury or death.
The Dieselguard System must be powered within the specified voltage range.
The installation of the Dieselguard System must be carried out by suitably trained and qualified
personnel.
Identification labels fixed to the Dieselguard System must not be damaged, removed or covered
before, during or after installation.
The installation is to be in accordance with the relevant installation Standards/Codes of Practice.

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Modifications must not be made to any part of the Dieselguard System. As supplied, the unit is
built to, and complies with the relevant standards. Modifications to its construction will render the
unit non-compliant.
Complete and accurate records of the installation must be kept as part of the site installation.
WARNING!
The apparatus is not suitable for use in areas where acetic acid
gases, mists, vapours or liquids are present.

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4.3 Mechanical Installation Information
4.3.1 Enclosure Dimensions
Figure 4.1: Diesel Machine Monitor Dimensions
4.3.2 Mounting Arrangements
The Dieselguard Diesel Machine Monitor can be mounted in any orientation without affecting its
operation. Since the unit does not require routine servicing, it can be mounted in a position that is not
normally accessible.
The lid of the enclosure must be fitted correctly with the Dubbo seals and M6 stainless steel button
head screws tightened to at least 0.1Nm. This is required to comply with the certification and IP rating.
Space should be allowed to ensure the lid is fitted correctly and the screws are torqued as required.
Figure 4.2: Mounting Hole Locations
200mm
320mm
80mm

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4.3.3 Terminal Layout
Figure 4.3: Terminal Layout for Diesel Machine Monitor
Figure 4.4: Isometric View of Diesel Machine Monitor’s Terminal Block
4-20mA
0V
SPEEDO 0V OIL
0V
RUN
0V
ALM RST 0V DEPUTY
0V
IDA Sig
0V
IDA RED 0V IDA GRN
0V
RTD3
RTD2
RTD1 Drv
RTD1 Ret
RTD1 LO
RTD1 HI
0V
SOL V+
0V IDA V+ 0V
SENSOR V+

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4.4 Electrical Installation Information
Figure 4.5: Typical Connection Diagram for the Dieselguard System
With the exception of the encapsulated flying lead, all of the connections to the Diesel Machine Monitor
are IS circuits and should be wired accordingly. In some locations it may be necessary to protect IS
cabling from mechanical damage. The unit is not supplied with interconnecting cables; the installer is
responsible for providing cabling to suit the application.
Customer Supply
(Alternator)
Ex ‘d’ or Ex ‘e’ Enclosure
Dieselguard Diesel Machine Monitor
Control
Enclosure
0V
TERM 1 TERM 2 TERM 3
TERM 4 TERM 5
PT100 (RTD1)
RED1
WHITE1
WHITE2
RED2
RTD1 Drv
RTD1 Ref
RTD1 LO
RTD1 HI
RTD3
PT100 (RTD3)
RED1
WHITE1
WHITE2
RED2
PT100 (RTD2)
RED1
WHITE1
WHITE2
RED2
RTD2
4-20mA IN
0V
SPEEDO
0V
OIL
0V
CH4 Transmitter
4-20mA
0V
+
Speed Sensor
+
Output
-
Term1: Sensor V+
IDA Display
Pressure Operated
Start Switch
RST DEP
RUN
ASCO Solenoid
0V
Red (12V)
Green (12V)
4-20mA Signal
ALARM RESET
0V
DEPUTY
0V
IDA SIGNAL
0V
IDA RED
0V
IDA GRN
0V
RUN
0V
0V
SOL V+
0V
SOL V+
IDA V+
0V
SENSOR V+
12V
Term1: 0V
V+ (Core 4)
V- (Core 3)
V- (Core 2)
V- (Core 1)
Type 2S
4 Core Cable
(Encapsulated)
Integrated or
Remote CH4
Sensor
EARTH STUD

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4.4.1 Power Supply
The power supply connection for the Diesel Machine Monitor is via the 3 metre 4 core Type 2S flying
lead. This cable must be terminated into a suitable Ex ‘d’or Ex ‘e’enclosure and is intended to be
connected to the alternator supply. The installer would typically gland this cable into the hours run
enclosure, but if all the gland entries are already allocated, a separate enclosure may be required.
The Diesel Machine Monitor can be powered from a nominal 12-24V supply. The unit is designed to
operate on an AC/DC supply of 9.5 - 36V but will withstand 90V. The input to the Diesel Machine
Monitor is isolated from the enclosure for use with non-earthed alternator systems.
Cores 1, 2 & 3 of the Type 2S cable should ideally connect to 0V. Core 4 of the Type 2S cable should
be connected to the +ve of the alternator supply. The Dieselguard system is not polarity sensitive, thus
the connections can be reversed if required. The polarity markings are present for variants with a non-
isolated 0V referenced input supply.
WARNING!
The apparatus must be installed such that the integral wires are
terminated in a suitably certified Ex ‘e’or Ex ‘d’enclosure having a
minimum Ingress Protection (IP) rating of IP55. If the wires are
terminated in an Ex e enclosure suitably certified Ex e terminals must
be used for terminating the wires.
4.4.2 Earth Stud
Figure 4.6: Location of the Earth Stud on Diesel Machine Monitor
WARNING!
The Diesel Machine Monitor has an earth stud that must be infallibly
connected to the chassis of the vehicle to comply with the
certification requirements.
4.4.1 Solenoid Output (Terminal Block 1: SOL V+)
The control solenoid for the Dieselguard System should be connected between the SOL V+ output and
0V on Terminal Block 1. The Diesel Machine Monitor will energise this output when the system is in the
healthy state, or when the Deputy Override Switch is activated.
The solenoid output is 24Vdc and is current limited to 84mA.
Earth Stud

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4.4.2 RUN/Start Input (Terminal Block 2: RUN)
When the RUN input is shorted to 0V, the Diesel Machine Monitor will wake up. This can be
accomplished via the connection of either a normally open momentary “Start” pushbutton in the control
enclosure, or via a pressure operated switch in the main pneumatic line.
Some machines have a two stage safety pressure loop and this function could also be derived from a
pressure switch mounted in the primary pressure circuit. When the machine’s pneumatic lines are
pressurised, the switch will close and the Diesel Machine Monitor will wake up.
4.4.3 Alarm Reset (Terminal Block 2: Alarm Reset)
When the Alarm Reset input is shorted to 0V, the Diesel Machine Monitor will clear any latched trips
(provided that the system is healthy). This can be accomplished via the connection of either a normally
open momentary “Reset” pushbutton or a selector switch with a momentary “Reset” position. This
operator is normally installed in the control enclosure.
4.4.4 Deputy Override (Terminal Block 2: Deputy)
Whilst the Deputy Override input is shorted to 0V, the Diesel Machine Monitor will override any current
alarm states and allow the machine to be started following, or during, a fault condition. This should be
implemented using a latched or locking contact on a selector switch. This operator is normally installed
in the control enclosure.
4.4.5 IDA Display Connections (Terminal Block 1 & 3)
The IDA display output terminals provide supply and control of the Dieselguard System’s intrinsically
safe display.
Terminal Block 1: IDA V+ should be connected to the 12V supply input of the IDA display.
Terminal Block 1: 0V should be connected to the 0V terminal of the IDA display.
Terminal Block3: IDA SIGNAL should be connected to the 4-20mA terminal of the IDA display.
Terminal Block 3: IDA RED should be connected to the Red (12V) terminal of the IDA display.
Terminal Block 3: IDA GRN should be connected to the Green (12V) terminal of the IDA display.
4.4.6 RTD Temperature Inputs (Terminal Block 4)
The Diesel Machine Monitor has one 4-wire RTD input (RTD1) and two 2-wire RTD inputs (RTD2 &
RTD3).
NOTE
If not in use, the RTD Inputs should be connected to the 0V terminal to
prevent the inputs from floating.
4.4.7 CH4 Transmitter Input (Terminal Block 1 & 5)
The GasGuard CH4 Transmitter should be powered from the SENSOR V+ supply on Terminal Block 1,
with the 0V connection being made on Terminal Block 5.
The 4-20mA output of the transmitter should be connected to the 4-20mA IN connection on Terminal
Block 5.
4.4.8 Speedo Input (Terminal Block 5)
The Diesel Machine Monitor is provided with an input for monitoring the speed of the diesel machine.
The Speedo input accepts a 5V pulse train input and records this information in the Diesel Machine
Monitor’s log in Hertz.

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DIESELGUARD USER MANUAL
MAG-179 Version 3 –APR/16
Uncontrolled Copy - Refer to Ampcontrol Website for Latest Version
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NOTE
If not in use, the Speedo Input should be connected to the 0V terminal
to prevent the input from floating.
4.4.9 Oil (Auxiliary) Input (Terminal Block 5)
The Diesel Machine Monitor is provided with an input for monitoring the voltage output of an auxiliary
sensor (typically an oil sensor). The Oil input accepts a 0-5V input and records this information in the
Diesel Machine Monitor’s log.
NOTE
If not in use, the Oil Input should be connected to the 0V terminal to
prevent the input from floating.

Ampcontrol Pty Ltd –ABN 28 000 915 542
DIESELGUARD USER MANUAL
MAG-179 Version 3 –APR/16
Uncontrolled Copy - Refer to Ampcontrol Website for Latest Version
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APPROVED FOR EXTERNAL DISTRIBUTION –PROPERTY OF AMPCONTROL PTY LTD –NOT TO BE REPRODUCED IN PART
5 COMMISSIONING AND CALIBRATION
Prior to being put into service, the Dieselguard System must be correctly commissioned. This manual
does not cover system commissioning; the full scope of commissioning tests should be determined
during the risk assessment or FMEA covering the design of the electrical protection system.
The following test can provide guidance on checking the correct operation of the Diesel Machine Monitor
during commissioning. This is not intended to provide an exhaustive commissioning checklist, but should
be considered to be a minimum set of tests.
5.1 Gasguard Sensor Calibration
Prior to being put into service, the Gasguard CH4 sensor will need to be calibrated as per the
instructions within its user manual.
5.2 Commissioning of the Dieselguard System
In order to confirm the correct operation of the Dieselguard System, the operation of the Gasguard
sensor, Diesel Machine Monitor and the solenoid will need to be tested.
To confirm correct operation:
1. Turn on the diesel machine, following all relevant site safety procedures.
2. Using a calibration gas of known concentration (above the trip level of 1.25%), test the operation
of the Gasguard sensor.
3. Confirm that the Dieselguard System trips, closing the solenoid and turning off the diesel
machine.