GSE 355 I.S. Product manual

GSE Model 350/355 I.S.
INTRINSICALLY SAFE INDICATOR
Technical Reference Manual
Version 3.0


GSE Model 350/355 I.S.
Technical Reference Manual
Version 3.0

GSE Model 350 I.S. and Model 355 I.S. Intrinsically Safe Technical ReferenceManual
Copyright © 2005 GSE Scale Systems. All rights reserved.
Published by:
GSE Scale Systems
42860 Nine Mile Road
Novi, MI 48375
USA
Information in this Operation Manual is subject to change without notice due to correction or
enhancement. The information described in this manual is solely the property of GSE. No part of this
manual may be reproduced or transmitted in any form or by any means, electronic or mechanical,
including photocopying and recording and sold for any monetary figure without the express written
permission of GSE.
GSE Locations
GSE Scale Systems
42860 Nine Mile Road
Novi, MI 48375
U.S.A.
Phone: (800) 755-7875
www.gse-inc.com
GSE Canada, Inc.
617 East Lake Road
Airdrie, Alberta Canada T4B 2B8
Phone: (403) 948-9921
Fax: (403) 948-1449
SPX GSE Amprobe Europe GmbH
Phone:+49 (0) 2161-59906-11
Fax:+49 (0) 2161-59906-20



i
Table of Contents
Chapter 1: Introduction...........................................................................................................................1
Hazardous Area Guidelines................................................................................................................2
Hazard Grouping................................................................................................................................2
Duration of Hazard.............................................................................................................................2
Temperature Codes ............................................................................................................................2
Definitions..........................................................................................................................................4
Entity Evaluation Concept.................................................................................................................4
Entity Rating Definitions ...................................................................................................................5
Entity Ratings.....................................................................................................................................5
Factory Mutual Approval ...................................................................................................................6
NEMKO Approval (ATEX)................................................................................................................7
CSA Approval ......................................................................................................................................8
Standard Functions..............................................................................................................................9
Standard Features................................................................................................................................9
Specifications ........................................................................................................................................9
Display.................................................................................................................................................10
LED Display....................................................................................................................................10
LCD Display....................................................................................................................................10
Annunciators ....................................................................................................................................10
350 I.S. KEYPAD...............................................................................................................................11
Secondary Functions........................................................................................................................11
355 I.S. Keypad..................................................................................................................................12
Weigh Mode Functions......................................................................................................................14
Entering a Tare Value (Model 350)..................................................................................................14
Entering a Tare Value (Model 355)..................................................................................................14
Chapter 2: Installation...........................................................................................................................15
System Diagrams................................................................................................................................16
Outline Drawings ...............................................................................................................................16
Load Cell Connections.......................................................................................................................17
Communication Port Connections ...................................................................................................18
Remote Key Connections...................................................................................................................18
Remote Display Connections ............................................................................................................19
Hazardous Area Options...................................................................................................................19
Battery Power Supply (External) .....................................................................................................19
AC To DC Power Supply (External) ...............................................................................................20
AC To DC Power Supply Extension Cable .....................................................................................20
5 Volt And 8 Volt Excitation...........................................................................................................20
Fiber-Optic Interface........................................................................................................................20

ii
Safe Area Options ..............................................................................................................................21
Safe Area Hub Kit............................................................................................................................21
Safe Area Analog Option Installation..............................................................................................26
Chapter 3: Configuration......................................................................................................................31
Entering the Setup Mode (Model 350 I.S.)......................................................................................32
Entering the Setup Mode (Model 355 I.S.)......................................................................................33
Selecting a Parameter........................................................................................................................33
Changing a Parameter Value............................................................................................................34
Selection Parameters........................................................................................................................34
Key-In Parameters............................................................................................................................35
Saving Parameters .............................................................................................................................36
Factory Default...................................................................................................................................38
List of Parameters..............................................................................................................................39
Parameter Map Details.....................................................................................................................41
Preset Transmit Selections ................................................................................................................48
ID Number Entry and Printing ........................................................................................................49
Custom Transmit ...............................................................................................................................50
Elements Of A Custom Transmit.....................................................................................................50
Writing A Custom Transmit ASCII Text File .................................................................................51
Access Setup And Clearing Existing Custom Transmit ..................................................................51
Entering ASCII Text ........................................................................................................................51
Entering ASCII Control Codes ........................................................................................................51
Parameter Selection Numbers..........................................................................................................53
Exiting Setup Mode And Saving Changes.......................................................................................54
Parts Counting ...................................................................................................................................54
Setpoint Setup.....................................................................................................................................55
Activation Methods (General) .........................................................................................................56
Pre-Acts (General) ...........................................................................................................................57
Learn Feature (General)...................................................................................................................57
Pause Feature (General)...................................................................................................................57
Changing Targets From The Weigh Mode (General)......................................................................58
Change Target Weight Example (General)......................................................................................58
Bargraph Setup (LCD)......................................................................................................................59
Scaling For "Bars" (Bargraph Arrows)............................................................................................59
Percentage Check-Weighing .............................................................................................................62
Setpoint Activation (Percentage Check-Weighing).........................................................................62
Changing Targets From The Weigh Mode (Percentage Check-Weighing).....................................62
Example (Percentage Check-Weighing)..........................................................................................63
Fill........................................................................................................................................................63
Activation Method (Fill) ..................................................................................................................64
Pre-Acts (Fill) ..................................................................................................................................64
Learn Feature (Fill) ..........................................................................................................................64
Pause Feature (Fill) ..........................................................................................................................65

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Changing Targets From The Weigh Mode (Fill) .............................................................................65
Example (Fill) ..................................................................................................................................65
Batch....................................................................................................................................................65
Activation Method (Batch) ..............................................................................................................66
Pre-Acts (Batch)...............................................................................................................................66
Learn Feature (Batch) ......................................................................................................................66
Pause Feature (Batch) ......................................................................................................................66
Changing Targets From The Weigh Mode (Batch) .........................................................................66
Example (Batch) ..............................................................................................................................67
Discharge.............................................................................................................................................67
ActivationMethod (Discharge) .......................................................................................................68
Pre-Acts (Discharge)........................................................................................................................68
Learn Feature (Discharge) ...............................................................................................................68
Pause Feature (Discharge) ...............................................................................................................68
Changing Targets From The Weigh Mode (Discharge) ..................................................................69
Example (Discharge)........................................................................................................................69
Both.....................................................................................................................................................69
Activation Method (Both) ................................................................................................................70
Pre-Acts (Both) ................................................................................................................................70
Learn Feature (Both) ........................................................................................................................70
Pause Feature (Both) ........................................................................................................................70
Changing Targets From The Weigh Mode (Both)...........................................................................71
Example (Both)................................................................................................................................71
Absolute Check-Weighing.................................................................................................................71
Setpoint Activation (Absolute Check-Weighing)............................................................................72
Changing Targets From The Weigh Mode (Absolute Check-Weighing)........................................72
Example (Absolute Check-Weighing).............................................................................................73
Independent Setpoint Operation......................................................................................................73
Setpoint Activation (Independent)...................................................................................................74
Changing Targets From The Weigh Mode (Independent)...............................................................74
Example (Independent)....................................................................................................................75
Target Deviation Check-Weighing...................................................................................................75
Setpoint Activation (Target Deviation Check-Weighing) ...............................................................75
Changing Targets From The Weigh Mode (Target Deviation Check-Weighing)...........................76
Example (Target Deviation Check-Weighing) ................................................................................77
Time and Date Setup (Model 350 I.S.).............................................................................................77
Time and Date Setup (Model 355 I.S.) .............................................................................................79
Remote Key Configuration...............................................................................................................80
Upgrade Indicator Firmware............................................................................................................80
Prepare For Upgrade ........................................................................................................................81
Load Flash File.................................................................................................................................81
Analog Output Setup.........................................................................................................................82
Analog Output Calibration...............................................................................................................82
Entering Analog Calibration Values................................................................................................83
Analog Output Example...................................................................................................................84

iv
Remote Display Configuration.........................................................................................................84
Master To Remote (Slave) Configuration........................................................................................84
Setup Master Indicator.....................................................................................................................85
Setup Remote Indicator....................................................................................................................85
Control (Hazardous Area) to Hub (Safe Area) Configuration......................................................89
300 Series Command Codes..............................................................................................................90
Display Capture Utility......................................................................................................................91
Chapter 4: Calibration...........................................................................................................................93
Setup Mode Calibration....................................................................................................................94
Fast Calibration.................................................................................................................................94
Performing Calibration.....................................................................................................................94
Establishing Zero ...............................................................................................................................94
First Zero..........................................................................................................................................95
Last Zero ..........................................................................................................................................96
False Zero.........................................................................................................................................98
Only Zero .......................................................................................................................................100
Reset Calibration............................................................................................................................101
Multi-Point Linerization.................................................................................................................103
First Zero?......................................................................................................................................103
Reset Cal........................................................................................................................................103
Examining Calibration Results ......................................................................................................104
Establishing A Span.........................................................................................................................104
Exiting Calibration..........................................................................................................................105
Chapter 5: Legal For Trade.................................................................................................................107
NTEP Requirements........................................................................................................................108
OMIL Requirements .......................................................................................................................108
Other Requirements ........................................................................................................................108
Sealing And Audit Trails.................................................................................................................109
Physical Seal..................................................................................................................................109
Audit Trails....................................................................................................................................110
OIML Audit Trail...........................................................................................................................110
Calibration Audit Trail...................................................................................................................110
Setup Audit Trail............................................................................................................................110
Viewing Audit Trail Parameters ....................................................................................................110
Chapter 6: Troubleshooting.................................................................................................................113
Error Messages.................................................................................................................................114
Operational Errors..........................................................................................................................114
Setup Mode Errors .........................................................................................................................114
Hardware Errors.............................................................................................................................115
Calibration Errors...........................................................................................................................115
Communication Errors...................................................................................................................115
Miscellaneous Errors......................................................................................................................115

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Viewing Setup...................................................................................................................................116
Information Mode Parameters .......................................................................................................116
A/D Calibration Procedure .............................................................................................................118
Appendix A: Maintenance...................................................................................................................121
Main Board Replacement................................................................................................................122
Main Board Removal.....................................................................................................................122
Main Board Installation.................................................................................................................122
Keypad Replacement .......................................................................................................................122
Model 350 I.S. Keypad Removal...................................................................................................122
Model 355 I.S Keypad Removal....................................................................................................122
Model 350 I.S. Keypad Installation...............................................................................................123
Model 355 I.S. Keypad Installation...............................................................................................123
Display Replacement .......................................................................................................................123
Display Removal............................................................................................................................123
Display Installation........................................................................................................................124
Appendix B: Label Drawings..............................................................................................................125
Appendix C: Control Drawings...........................................................................................................135


Chapter 1: Introduction
Thank you for selecting the GSE Model 350/355 Intrinsically Safe Indicator. The Model 350 I.S. and Model 355
I.S. continue the GSE tradition of Excellence in Weighing.Aproperly installed and maintained Model 350 I.S.
or Model 355 I.S. will provide many years of reliable, accurate performance.
The chapters of this manual focus on various aspects of the Model 350/355 I.S.:
Chapter 1: Introduction Hazardous Area Guidelines, Features and Specifications.
Chapter 2: Installation Installation of Indicator and Options.
Chapter 3: Configuration Setup the Model 350/355 I.S. to a specific application.
Chapter 4: Operation Using the Model 350/355 I.S.
Chapter 5: Calibration Calibrate the indicator to a scale.
Chapter 6: Troubleshooting Troubleshooting help and error messages.
Appendix A: Maintenance Main board, display and keypad replacement
Appendix B: Label Drawings Drawings of the different approval labels used
Appendix C: Control Drawings System drawings

2
Hazardous Area Guidelines
The GSE Models 350 I.S. and 355 I.S. instruments are approved by FM Approvals as intrinsically safe for use in
hazardous areas. An intrinsically safe device has been proven through calculation and testing that it cannot
produce enough electric or thermal energy under normal or fault conditions to cause ignition of flammable
material present in the atmosphere. The hazardous area is defined in terms of how long the hazard is present,
how easily it is ignited, and what maximum temperature can be present.
Hazard Grouping
Gas/Dust/Fiber US (NEC 505)
IEC/CENELEC US (NEC500)
Acetylene Group IIC Class I/Group A
Hydrogen (Group IIB + H2)Class I/Group B
Ethylene Group IIB Class I/Group C
Propane Group IIA Class I/Group D
Gases
Methane Group I * Mining *
Metal Dust None Class II/Group E
Coal Dust None Class II/Group F
Dusts
Grain Dust None Class II/Group G
Fibers None Class III
*Not within scope of NEC
Duration of Hazard
Flammable
material present
continuously
Flammable
material present
intermittently
Flammable
material present
abnormally
IEC/CENELEC Zone 0 Zone 1 Zone 2
US (NEC 505) Zone 0 Zone 1 Zone 2
US (NEC 500) Division 1 Division 2
Temperature Codes
Max. Surface Temp.
US (NEC 505)
IEC/CENELEC US (NEC 500)
450oCT1 T1
300oCT2 T2
280oCT2A
260oCT2B
230oCT2C
215oCT2D
200oCT3 T3
180oCT3A
165oCT3B
160oCT3C
135oCT4 T4
120oCT4A
100oCT5 T5
85oCT6 T6

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Class I, Division 1, Groups A, B, C & D
Class I, Division 1 locations are those in which hazardous concentrations of flammable gases or vapors exist
continuously, intermittently or periodically under normal operating conditions. Electrical equipment for use in
such locations may be ‘‘explosion proof,’’ ‘‘intrinsically safe,’’ ‘‘purged’’ or otherwise protected to meet the
intent of Articles 500 of the National Electrical Code®.
Explosion proof protection consists of equipment designed to be capable of containing an internal explosion of a
specified flammable vapor-air mixture. In addition, the equipment must operate at a safe temperature with
respect to the surrounding atmosphere.
Intrinsically safe electrical equipment and associated wiring are incapable of releasing sufficient electrical or
thermal energy to cause ignition of a specific hazardous material under ‘‘normal’’ or ‘‘fault’’ operating
conditions. Normal operation assumes maximum supply voltage and rated environmental extremes; fault
conditions assume any single or dual independent electrical faults plus field wiring open, shorts or connections
to ground. Equipment rated as intrinsically safe is recognized by Article 500 as safe for use in hazardous
locations without special enclosures or physical protection that would otherwise be required.
Purged systems have fresh air or an inert gas under positive pressure to exclude ignitable quantities of
flammables from the electrical equipment enclosure.
Equipment Approved for Division 1 locations shall be permitted in Division 2 locations of the same class, group
and temperature class.
Class I, Division 2, Groups A, B, C & D
Class I, Division 2 locations are those in which hazardous concentrations of flammables exist only under
unlikely conditions of operation. As such, equipment and associated wiring which are incapable of releasing
sufficient electrical and thermal energy to ignite flammable gases or vapors under ‘‘normal’’ operation and
environmental conditions are safe to use in Class I, Division 2 locations.
Class I, Zone 0, Groups IIC, IIB & IIA
A Class I, Zone 0 location is a location (1) in which ignitable concentrations of flammable gases or vapors are
present continuously; or (2) in which ignitable concentrations of flammable gases or vapors are present for long
periods of time. Electrical apparatus for use in such locations may be type of protection ‘‘ia’’ Intrinsic Safety.
Class I, Zone 1, Groups IIC, IIB & IIA
A Class I, Zone 1 location is a location (1) in which ignitable concentrations of flammable gases or vapors are
likely to exist under normal operating conditions; or (2) in which ignitable concentrations of flammable gases or
vapors may exist frequently because of repair or maintenance operations or because of leakage; or (3) in which
equipment is operated or processes are carried on, of such a nature that equipment breakdown or faulty
operations could result in the release of ignitable concentrations of flammable gases or vapors and also cause
simultaneous failure of electrical equipment in a mode to cause the electrical equipment to become a source of
ignition; or (4) that is adjacent to a Class I, Zone 0 location from which ignitable concentrations of vapors could
be communicated, unless communication is prevented by adequate positive-pressure ventilation from a source of
clean air and effective safeguards against ventilation failure are provided. Electrical apparatus for use in such
locations may be type of protection ‘‘d’’ Flameproof, ‘‘e’’ Increased Safety, ‘‘ib’’ Intrinsic Safety, ‘‘m’’
Encapsulation, ‘‘o’’ Oil Immersion, ‘‘p’’ Pressurized or ‘‘q’’ Powder-Filled.
Note: Electrical apparatus Approved for use in Class I, Zone 0 locations shall be permitted in Class I, Zone 1
locations of the same gas group and temperature class.
Class I, Zone 2, Groups IIC, IIB & IIA
A Class I, Zone 2 location is a location (1) in which ignitable concentrations of flammable gases or vapors are
not likely to occur in normal operation and if they do occur will exist only for a short period; or (2) in which
volatile flammable liquids, flammable gases or flammable vapors are handled, processed or used, but in which
the liquids, gases or vapors normally are confined within closed containers or closed systems from which they
can escape only as a result of accidental rupture or breakdown of the containers or system or as the result of the

4
abnormal operation of the equipment with which the liquids or gases are handled, processed or used; or (3) in
which ignitable concentrations of flammable gases or vapors normally are prevented by positive mechanical
ventilation, but which may become hazardous as the result of failure or abnormal operation of the ventilation
equipment; or (4) that is adjacent to a Class I, Zone 1 location, from which ignitable concentrations of
flammable gases or vapors could be communicated, unless such communication is prevented by adequate
positive-pressure ventilation from a source of clean air and effective safeguards against ventilation failure are
provided. Electrical apparatus for use in such locations may be type of protection ‘‘nA’’ Non-Sparking, ‘‘nC’’
Protected contacts, ‘‘nR’’ Restricted Breathing or ‘‘p’’ Pressurized.
Note: Electrical apparatus Approved for use in Class I, Zone 0 or Zone 1 locations shall be permitted in Class I,
Zone 2 locations of the same gas group and temperature class.
Class II, Divisions 1 & 2, Groups E, F & G
Electrical equipment suitable for use in Class II locations, as defined by the National Electrical Code®, is
constructed to exclude ignitable amounts of dust from the equipment enclosure. Approved equipment of this
type has also been evaluated to assure that hazardous surface temperatures do not exist. Equipment listed as
suitable for Class II locations is ‘‘dust-ignitionproof’’ or otherwise designed to meet the intent of Articles 500
and 502 of the National Electrical Code®.
Class III, Divisions 1 & 2
Class III locations are those which are hazardous because of the presence of ignitable fibers or flyings.
Equipment listed for installation in Class III locations is designed to exclude the fibers and flyings from the
equipment enclosure and to function without developing excessive surface temperatures.
Definitions
Associated Apparatus —Apparatus, including Category ia and ib apparatus, in which the circuits are not
necessarily intrinsically safe themselves, but which affect the energy in the intrinsically safe circuits and are
relied upon to maintain intrinsic safety. Associated electrical apparatus may be either:
a) Electrical apparatus that has an alternative type of protection for use in the appropriate potentially flammable
atmosphere; or
b) Electrical apparatus not so protected and thus not suitable for use in a potentially flammable atmosphere.
Control Drawing —A drawing or other document provided by the manufacturer of the intrinsically safe or
associated apparatus that details the allowed interconnections to other circuits or apparatus. If the intrinsically
safe or associated apparatus is investigated under the entity concept, the control drawing will include the
applicable electrical parameters to permit selection of apparatus for interconnection.
Entity Evaluation Concept—A method used to determine acceptable combinations of intrinsically safe
apparatus and connected associated apparatus that have not been investigated in such combination.
Hazardous (Classification) Location —A location in which fire or explosion hazards may exist due to an
explosive atmosphere of flammable gases or vapors, flammable liquids, combustible dust, or easily ignitable
fibers or flyings.
Intrinsically Safe Circuit —A circuit in which any spark or thermal effect, produced either normally or in
specified fault conditions, is incapable, under the test conditions prescribed in this standard, of causing ignition
of a mixture of flammable or combustible material in air in the mixture’s most easily ignited concentration.
Nonincendive Circuit — A circuit, other than field wiring, in which any arc or thermal effect produced
under intended operating conditions of the equipment is not capable, under specified test conditions, of
igniting the flammable gas-air, vapor-air, or dust-air mixture.
Entity Evaluation Concept
The Model 350 I.S. and 355 I.S. indicators have been approved under the entity evaluation concept, which
allows the interconnection of intrinsically safe devices in hazardous areas even though these devices were not

55
specifically approved in this combination. This means that not only can the instrument be used with GSE FM
Approved loadcells and peripherals, but they can also be used with any manufacturer’s FM Approved loadcells
and peripherals provided that they have matching entity ratings and are approved for the appropriate hazardous
area.
The criteria for interconnection is that the maximum input voltage and current, which intrinsically safe apparatus
can receive and remain intrinsically safe, considering faults, must be equal to or greater than the maximum
output voltage and current levels which can be delivered by the associated apparatus, considering faults and
applicable factors. In addition, the maximum internal capacitance and inductance of the intrinsically safe
apparatus, including interconnecting wiring, must be less than or equal to the maximum allowed capacitance and
inductance which can be safely connected to the associated apparatus. If these criteria are met, then the
combination may be connected and remain intrinsically safe. If the specific capacitance and inductance ratings
of the wiring are unknown, use a capacitance of 60pF/ft and an inductance of 0.2uH/ft.
When connecting a Model 350 I.S. or 355 I.S. to another intrinsically safe device, the entity ratings
must be compared and satisfy the conditions shown in the following table.
350 I.S./355 I.S. Indicator Condition Intrinsically Safe Device
Voc <= Vmax or Ui
Isc <= Imax or Ii
Ca >= Ci + cable capacitance
La >= Li + cable inductance
Po <= Pi
Entity Rating Definitions
Voc or Uo –the maximum open circuit voltage that may be present at the specified terminals
Isc or Io–the maximum short circuit current that may be present at the specified terminals
Ca or Co-the maximum capacitance that may be connected to the specified terminals
La or Lo -the maximum inductance that may be connected to the specified terminals
Po -the maximum output power from the specified terminals
Lo/Ro –inductance to resistance ratio that indicates the maximum inductance per ohm of resistance that can be connected
to the specified terminals
Vmax or Ui –the maximum voltage that may be connected to the specified terminals
Imax or Ii -the maximum current that may be connected to the specified terminals
Ci –the capacitance present at the specified terminals
Li –the inductance present at the specified terminals
Pi –the maximum power that may be supplied to the specified terminals
Li/Ri –the maximum internal inductance to resistance ratio at the specified terminals
Entity Ratings
Terminal
Description Voc Isc Po Ca La Group
J10 Loadcell (5V EXC)
7V 400mA 700mW 8.3uF 198mH A-G, IIC-IIA
J10 Loadcell (8V EXC)
14 V 400mA 1.4W 4.6uF 945.2uH C-G, IIB-IIA
J8 COMM 1&2 7V 50mA 87.5mW 15.4uF 13.7mH A-G, IIC-IIA
J11 Remote Keys 7V 62mA 109mW 15.4uF 9mH A-G, IIC-IIA
J5 Remote Display 7V 50mA 87.5mW 15.7uF 13.7mH A-G, IIC-IIA

6
Factory Mutual Approval
The Model 350 I.S. and 355 I.S. indicators and options have been approved for the following hazardous areas:
Factory Mutual Project Identifier: 3018357
Indicator/Option Approval
M350 I.S./M355 I.S.
(5V Excitation)
20H350-00010
20H350-00020
20H350-00030
20H355-00010
20H355-00020
20H355-00030
I.S. for CL I-III, DIV 1, GP A-G
I.S. for CL I, ZN 0, GP IIC-IIA
N for CL I, DIV 2, GP A-D
N for CL I, ZN 2, GP IIC-IIA
S CL II-III, DIV 2, GP F-G
T4 (Ta=50oC)
M350I.S./M355 I.S.
(8V Excitation)
20H350-00011
20H350-00021
20H350-00031
20H355-00011
20H355-00021
20H355-00031
I.S. for CL I-III, DIV 1, GP C-G
I.S. for CL I, ZN 0, GP IIB-IIA
N for CL I, DIV 2, GP A-D
N for CL I, ZN 2, GP IIC-IIA
S CL II-III, DIV 2,GP F-G
T4 (Ta=50oC)
Battery Power Supply Option
24H3502-201C0
I.S. for CL I-III, DIV 1, GP A-G
I.S. for CL I, ZN 0, GP IIC-IIA
N for CL I, DIV 2, GP A-D
N for CL I, ZN 2, GP IIC-IIA
S CL II-III, DIV 2,GP F-G
T3 (Ta=40oC)
AC to DC Power Supply Option
24H3501-200C0
(single output used)
AIS for
CL I-III, DIV 1, GP A-G
CL I, ZN 1, AEx m [ia] GP IIC-IIA
N for CL I, DIV 2, GP A-D
N for CL I, ZN 2, GP IIC-IIA
S CL II-III, DIV 2,GP F-G
S CL I-III, DIV 1,GP A-G*
T4 (Ta=50oC)
* When installed in a CL I-III, DIV 1, GP A-G location, conduit must be
used on the AC supply cable.
AC to DC Power Supply Option
24H3501-200C0
(dual outputs used)
AIS for
CL I-III, DIV 1, GP C-G *
CL I, ZN 0, GP IIB-IIA *
N for CL I, DIV 2, GP A-D
N for CL I, ZN 2, GP IIC-IIA
S CL II-III, DIV 2,GP F-G
S CL I-III, DIV 1,GP C-G*
T4 (Ta=50oC)
* When installed in a CL I-III, DIV 1, Group C-G location, conduit must
be used on the AC supply cable.

77
NEMKO Approval (ATEX)
Recapitulation of certification
NEMKO approval number 04ATEX1356X
II1GD T117°C
II2(1)GD T64°C
II2(1)GD T193°C
ITEM Intrinsic Safety APPROVAL
Description GS E part number
Equipment
Group
Category
Rating
gases,
Vapors, Mist
Rating
Dusts
Class
group
Zone
T rating
Ta
350IS 355IS
Standard Indicators 20H350-XXXX0
20H355-XXXX0 II 1G
T
117°C
D1IIC 0T4 50°
C
350IS 355IS
Indicators with 8V
Exc.
20H350-XXXX1
20H355-XXXX1 II 1G
T
117°C
D1IIB 0T4 50°
C
M3502 Battery
Power Supply 24H3502-201C0 II 1G
T
193°C
D1IIC 0T3 40°
C
AC-DC Power
Supply
Single output
24H3501-200C0 II 2G
D
T 64°C1IIC 1T4 50°
C
AC-DC Power
Supply
Dual output
24H3501-200C0 II 2G
D
T 64°C1IIC 1T4 50°
C
Above NEMKO ratings include the following options:
24H350-100B0 Fiber Optic Transceiver Option Kit
Following components must be used in a safe area, these products do not have NEMKO approval:
24S350-100A0 Safe Area Hub Kit, M350/355IS
24S350-200B0 Battery Charger, M350/355IS

8
CSA Approval
Master Contract Number: 22640
Certificate Number: 1538366
Ex nL IIC:
Class I, Division 2, Groups A, B, C, D
Weight indicators, Models 350 I.S. and 355 I.S., powered by either battery pack module, Model 3502 or associated
apparatus AC-DC power supply, Model 3501, rated 90-250 VAC, 50/60 Hz, 120 mA with single I.S. output rated 12.7 volt,
315 mA. Non-Incendive when installed per Control Drawing 41533.Temp. Code T4 at Tamb = 50°C.
Ex nL IIC:
Class I, Division 2, Groups C, D
Weight indicators with 8 Volt excitation option board, Models 350 I.S. and 355 I.S., powered by either battery pack
module, Model 3502 or associated apparatus AC-DC power supply, Model 3501, rated 90-250 VAC, 50/60 Hz, 120 mA
with single I.S. output rated 12.7 volt, 315 mA. Non-Incendive when installed per Control Drawing 41533. Temp. Code T4
at Tamb = 50°C.
Ex ia IIC:
Class I, Groups A, B, C, D; Class II, Groups E, F, G; Class III:
Weight indicators, Models 350 I.S. and 355 I.S., powered by either battery pack module, Model 3502 or associated
apparatus AC-DC power supply, Model 3501, rated 90-250 VAC, 50/60 Hz, 120 mA with single I.S. output rated 12.7 volt,
315 mA. Intrinsically Safe when installed per Control Drawing 41533 with the Entity Parameters listed. Temp. Code T4 at
Tamb = 50°C.
Ex ia IIB:
Class I, Groups C, D; Class II, Groups E, F, G; Class III:
Weight indicators with 8 Volt excitation option board, Models 350 I.S. and 355 I.S., powered by either battery pack
module, Model 3502 or associated apparatus AC-DC power supply, Model 3501, rated 90-250 VAC, 50/60 Hz, 120 mA
with dual single I.S. output rated 12.7 volt, 315 mA. Intrinsically Safe when installed per Control Drawing 41533 with the
Entity Parameters listed. Temp. Code T4 at Tamb =50°C.
Item GSE Part
Number Approval
Class I, Div. 2, Groups A, B, C, D
Ex nL IIC T4 at Tamb =50°C5 Volt Excitation
350I.S.
20H350-00010
20H350-00020
20H350-00030
20H350-06010
20H350-06020
20H350-06030
Class I, Groups A, B, C, D;
Class II, Groups E, F, G;
Class III
ExiaIIC T4 at Tamb =50°C
Class I, Div. 2, Groups A, B, C, D Ex nL IIC T4 at Tamb =50°C5 Volt Excitation
355 I.S.
20H355-00010
20H355-00020
20H355-00030
20H355-06010
20H355-06020
20H355-06030
Class I, Groups A, B, C, D;
Class II, Groups E, F, G;
Class III
ExiaIIC T4 at Tamb =50°C
Class I, Div 2, Groups C, D Ex nL IIC T4 at Tamb =50°C8 Volt Excitation
350I.S.
20H350-00011
20H350-00021
20H350-00031
20H350-06011
20H350-06021
20H350-06031
Class I, Div 2, Groups C, D;
Class II, Groups E, F, G;
Class III
ExiaIIB T4 at Tamb =50°C
Class I, Div 2, Groups C, D Ex nL IIC T4 at Tamb =50°C8 Volt Excitation
355 I.S.
20H355-00011
20H355-00021
20H355-00031
20H355-06011
20H355-06021
20H355-06031
Class I, Div 2, Groups C, D;
Class II, Groups E, F, G;
Class III
ExiaIIB T4 at Tamb =50°C
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