Ampcontrol Gasguard 2 User manual

Version: 1, July 2020
Designed and manufactured in Australia by Ampcontrol Pty Ltd
GG2 COMMUNICATIONS
4-20mA/IMAC/RS485
UserManual

Ampcontrol Pty Ltd –ABN 28 000 915 542
GG2 COMMUNICATIONS USER MANUAL
GG2B032 Version 1 –JULY/2020
Uncontrolled Copy - Refer to Ampcontrol Website for Latest Version
Page 2 of 22
APPROVED FOR EXTERNAL DISTRIBUTION –PROPERTY OF AMPCONTROL PTY LTD –NOT TO BE REPRODUCED IN PART
WARNING!
The warning symbol highlights a potential risk malfunction or loss of
performance
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.

Ampcontrol Pty Ltd –ABN 28 000 915 542
GG2 COMMUNICATIONS USER MANUAL
GG2B032 Version 1 –JULY/2020
Uncontrolled Copy - Refer to Ampcontrol Website for Latest Version
Page 3 of 22
APPROVED FOR EXTERNAL DISTRIBUTION –PROPERTY OF AMPCONTROL PTY LTD –NOT TO BE REPRODUCED IN PART
Copyright Notice
The Ampcontrol GG2 Display 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 any
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 from the Ampcontrol GG2 range.
WARNING!
In the interests of safety and correct equipment operation, please
take the time to read and understand the content in this manual.
Ampcontrol Contact Details
7 Billbrooke Close, Cameron Park, NSW, 2285
P [phone] | F [phone]
EMAIL: [e-mail]
WEB: ampcontrolgroup.com

Ampcontrol Pty Ltd –ABN 28 000 915 542
GG2 COMMUNICATIONS USER MANUAL
GG2B032 Version 1 –JULY/2020
Uncontrolled Copy - Refer to Ampcontrol Website for Latest Version
Page 4 of 22
APPROVED FOR EXTERNAL DISTRIBUTION –PROPERTY OF AMPCONTROL PTY LTD –NOT TO BE REPRODUCED IN PART
TABLE OF CONTENTS
DEFINITIONS ......................................................................................................5
1 SAFETY AND OTHER WARNINGS..................................................................6
1.1 Safe Use of Equipment..............................................................................6
1.2 Supplementary Documentation..................................................................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 GG2 COMMUNICATIONS ................................................................................8
3.1 Overview....................................................................................................8
3.2 GG2 Detector Types..................................................................................8
4 IMAC COMMUNICATIONS...............................................................................9
4.1 GG2 Detector Removal..............................................................................9
4.2 iMAC Registers..........................................................................................9
4.3 Gasguard Live Registers .........................................................................12
4.4 Hard Fault Output Values ........................................................................17
5 MODBUS COMMUNICATIONS ......................................................................18
5.1 GG2 Detector Removal............................................................................18
5.2 Register Map ...........................................................................................18

Ampcontrol Pty Ltd –ABN 28 000 915 542
GG2 COMMUNICATIONS USER MANUAL
GG2B032 Version 1 –JULY/2020
Uncontrolled Copy - Refer to Ampcontrol Website for Latest Version
Page 5 of 22
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DEFINITIONS
Term
Definition
CO2
Carbon Dioxide
CH4
Methane
CO
Carbon Monoxide
O2
Oxygen
H2S
Hydrogen Sulphide
NATA
National Association of Testing Authorities, Australia
NDIR
Non-Dispersive Infra-red
Warm Up Time
Time interval, with the equipment in a stated atmosphere, between the time
when the equipment is switched on and the time when the indication reaches
and remains within the stated tolerances
AS 4641:2007
Electrical apparatus for detection of oxygen and other gases and vapours at
toxic levels - general requirements and test methods
AS 2290.3-1990
Electrical equipment for coal mines - maintenance and overhaul Part 3:
maintenance of gas detecting and monitoring equipment.
AS/NZS 60079-
29.1:2008
Explosive atmospheres part 29.1: Gas detectors - Performance requirements of
detectors for flammable gases
IEC 60079.0:2011
Explosive atmospheres - Part 0: Equipment - General requirements
IEC 60079.11:2011
Explosive atmospheres - Part 11: Equipment protection by intrinsic safety "i"
GG2
Gasguard 2
ILAC
International Laboratory Accreditation Cooperation Mutual Recognition
Arrangement.
ILAC is the international organisation for accreditation bodies operating in
accordance with ISO/IEC 17011 and involved in the accreditation of conformity
assessment bodies including calibration laboratories (using ISO/IEC 17025),
testing laboratories (using ISO/IEC 17025), medical testing laboratories (using
ISO 15189), inspection bodies (using ISO/IEC 17020) and proficiency testing
providers using ISO/IEC 17043.

Ampcontrol Pty Ltd –ABN 28 000 915 542
GG2 COMMUNICATIONS USER MANUAL
GG2B032 Version 1 –JULY/2020
Uncontrolled Copy - Refer to Ampcontrol Website for Latest Version
Page 6 of 22
APPROVED FOR EXTERNAL DISTRIBUTION –PROPERTY OF AMPCONTROL PTY LTD –NOT TO BE REPRODUCED IN PART
1 SAFETY AND OTHER WARNINGS
For safety reasons, the GG2 Display 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:
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.
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.
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.
Installation
Correct operation and safety depend on GG2 Display 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.
Operation
As safety depends on GG2 Display functioning correctly it is highly recommended that all safety
functions of the unit be periodically tested to ensure correct operation.
1.2 Supplementary Documentation
The GG2 Display User Manual is expected to be read in conjunction with the following documentation:
GG2B011 GG2 Detector User Manual
GG2B023 GG2 Display User Manual
GG2B033 GG2 Design, Installation and Maintenance Application Guide

Ampcontrol Pty Ltd –ABN 28 000 915 542
GG2 COMMUNICATIONS USER MANUAL
GG2B032 Version 1 –JULY/2020
Uncontrolled Copy - Refer to Ampcontrol Website for Latest Version
Page 7 of 22
APPROVED FOR EXTERNAL DISTRIBUTION –PROPERTY OF AMPCONTROL PTY LTD –NOT TO BE REPRODUCED IN PART
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 the 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 specifications
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.
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.

Ampcontrol Pty Ltd –ABN 28 000 915 542
GG2 COMMUNICATIONS USER MANUAL
GG2B032 Version 1 –JULY/2020
Uncontrolled Copy - Refer to Ampcontrol Website for Latest Version
Page 8 of 22
APPROVED FOR EXTERNAL DISTRIBUTION –PROPERTY OF AMPCONTROL PTY LTD –NOT TO BE REPRODUCED IN PART
3 GG2 COMMUNICATIONS
3.1 Overview
The GG2 Display Module is an intrinsically safe apparatus for the purpose of displaying and transmitting
sensor data and system information. The GG2 Display consists of a certified GG2 Display Module and
associated wiring installed within an IP66 rated stainless steel enclosure.
The GG2 Display is available in three variants, a glanded display supporting iMAC/RS485
communication and two pluggable versions supporting 4-20mA+iMAC and 4-20mA+RS485
communication.
This document details the Modus and iMAC communication protocols. Refer to the following sections
Modbus Communication –Section 5.
iMAC Communication –Section 4.
3.2 GG2 Detector Types
The following table outlines some of the common part numbers. For more information on the GG2 range
of products, refer to GG2B026 GG2 Monitoring Solution Technical Datasheet.
Table 1: GG2 Detector Type Table
Gas
Type
Detector
Technology
Measurement Range
Ampcontrol Part
Numbers
CH4
Catalytic
0-5% v/v
177871
CH4
IR
0-5% v/v
177870
CH4
IR
0-100% v/v
190998
CO2
IR
0-2% v/v
180734
CO2
IR
0-5% v/v
180733
CO
Electrochemical
0-50ppm
177873
CO
Electrochemical
0-100ppm
177874
O2
Electrochemical
0-25% v/v
177872
H2S
Electrochemical
0-50ppm
178228
H2S
Electrochemical
0-100ppm
193071
Figure 1: GG2 Example System (iMAC Communication)
iMAC Fieldbus

Ampcontrol Pty Ltd –ABN 28 000 915 542
GG2 COMMUNICATIONS USER MANUAL
GG2B032 Version 1 –JULY/2020
Uncontrolled Copy - Refer to Ampcontrol Website for Latest Version
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4 IMAC COMMUNICATIONS
4.1 GG2 Detector Removal
If iMAC is activated and the detector is removed, all bit fields will go to all zeros and all numerical values
will go to 0xFFFF. The setpoint flag bits and data invalid bit will go high (1) and are exceptions to the
previous rule.
4.2 iMAC Registers
Flags Data Register
SCADA* - These registers/bits must be monitored and included in the trip permissives for all safety
system applications when this protocol is selected.
Bit
Description
Value
iMAC
Exception
Trigger?
R/W
Application Notes
SCADA*
0
Analogue
input moved
away from
healthy
region and
reached
Setpoint 1
1 = Warn
Yes
R
This bit is set when it
traverses the setpoint.
1
Analogue
input moved
away from
healthy
region and
reached
Setpoint 2
1 = Warn
Yes
R
This bit is set when it
traverses the setpoint.
2
Analogue
input moved
away from
healthy
region and
reached
Setpoint 3
1 = Trip
Yes
R
This bit is set when it
traverses the setpoint
i.e. typical used for Tripping
in RTGMS / Gas monitoring
SLP codes.

3
SP1 flag not
set AND
SP2 flag not
set
1 = Warn
Yes
R
Used for AIM compatibility.
4
SP2 flag set
AND SP3
flag not set
1 = Warn
Yes
R
Used for AIM compatibility.
5
Power
supply <
Setpoint A
(warn)
1 = Warn
Yes
R
This bit is set when it
traverses the setpoint.
6
Power
supply <
Setpoint B
(trip)
1 = Trip
Yes
R
This bit is set when it
traverses the setpoint
i.e. typical used for Tripping
in RTGMS / Gas monitoring
SLP codes.


Ampcontrol Pty Ltd –ABN 28 000 915 542
GG2 COMMUNICATIONS USER MANUAL
GG2B032 Version 1 –JULY/2020
Uncontrolled Copy - Refer to Ampcontrol Website for Latest Version
Page 10 of 22
APPROVED FOR EXTERNAL DISTRIBUTION –PROPERTY OF AMPCONTROL PTY LTD –NOT TO BE REPRODUCED IN PART
Bit
Description
Value
iMAC
Exception
Trigger?
R/W
Application Notes
SCADA*
7
System fault
1 = System
has detected
a hardware,
Detector or
software fault.
0 = No fault in
operation
detected.
Yes
R
System fault
E.g. sensor head missing /
display <-> head comms
fault, etc.

8
Cal cup on
1 = Cup on
Yes
R
The GG2 senses the
magnets in our approved cup
(E.g. bump test, zero / span
adjust, calibration)
9
Gas Value
Invalid
1 = Analogue
4-20mA gas
reading is not
reflecting the
real world gas
value.
Yes
R
Analogue 4-20mA gas
reading is not reflecting the
real world gas value. (I.e. it is
currently in fault or warmup
or otherwise unreliable. This
includes the sensor being in
warmup, even if 4-20mA is
returning the sensor value
during warmup).

10
Detector
Head
Warmup
1 = Warmup
busy
No
R
GG2 Detector currently in
warmup mode

11
Linearity
test due
1 = Linearity
test due
No
R
International Laboratory
Accreditation Cooperation
Mutual Recognition
Arrangement. Linearity (i.e.
NATA) test is now overdue.
12
Overrange
latch on
CH4
catalytic
detector
OR
NDIR
incomplete
adjustment
1 =
Overrange
latch on CH4
Catalytic
detector
OR
IR adjustment
incomplete
Yes
R
Overrange latch on CH4
catalytic detector
CH4 has exceeded full scale.
The sensor is switched off to
protect it from damage.
OR
NDIR incomplete adjustment
Non dispersive Infra Red
sensors had an incomplete
calibration sequence. This is
unique to this sensor type. In
short, once you start
zero/span adjustment, the
values are wiped at the start.

13
Hardware
fault
1 = Hardware
fault
Yes
R
A fault which
impedes/prevents gas
detection/other critical
function has been detected.
