GDS Corp GASMAX EC User manual

GDS Corp.
2513 Hwy 646 Santa Fe, Texas 77510
409-927-2980 409-927-4180 (Fax) ww.gdscorp.com
Operation and Maintenance
Manual
GASMAX EC Loop-Powered Toxic Gas Monitor

GASMAX EC Operation & Maintenance Manual, Revision 3.5
Page 2
CAUTION: FOR SAFETY REASONS THIS EQUIPMENT MUST BE OPERATED AND
SERVICED BY QUALIFIED PERSONNEL ONLY. READ AND UNDERSTAND INSTRUCTION
MANUAL COMPLETELY BEFORE OPERATING OR SERVICING.
ATTENTION: POUR DES RAISONS DE SÉCURITÉ, CET ÉQUIPEMENT DOIT ÊTRE UTILISÉ,
ENTRETENU ET RÉPARÉ UNIQUEMENT PAR UN PERSONNEL QUALIFIÉ. ÉTUDIER LE
MANUE D’INSTRUCTIONS EN ENTIER AVANT D’UTILISER, D’ENTRETENIR OU DE
RÉPARER L’ÉQUIPEMENT.
REVISION HISTORY
Revision 3.5.1 4/15/13 Initial rewrite for GASMAX EC
Copyright © 2013 GDS Corp. All Rights Reserved
P/N 1200-0852-01

GASMAX EC Operation & Maintenance Manual, Revision 3.5
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CONTENTS
1 SAFETY INFORMATION _______________________________________________ 8
2 GENERAL INFORMATION ______________________________________________ 9
Introduction ________________________________________________________________ 9
GASMAX Sensors ____________________________________________________________ 9
3 SPECIFICATIONS ____________________________________________________ 10
4 INSTALLATION _____________________________________________________ 11
Locating the GASMAX EC _____________________________________________________ 11
Mounting the GASMAX Instrument Enclosure ____________________________________ 11
Mounting the GASMAX emote Sensor Enclosure _________________________________ 12
Explosion Proof Installation ___________________________________________________ 12
Intrinsically Safe Installation __________________________________________________ 13
Connecting Loop Power / Signal Wiring _________________________________________ 13
Local Smart Sensor __________________________________________________________ 14
Connecting a emote Sensor __________________________________________________ 15
Initial Setup _______________________________________________________________ 16
5 CALIBRATION ______________________________________________________ 18
Calibration Overview ________________________________________________________ 18
Calibration Procedure _______________________________________________________ 19
6 OPERATION AND MAINTENANCE ______________________________________ 21
GASMAX Display Screens _____________________________________________________ 21
Data Display Screen _________________________________________________________ 21
Trend Display Screen ________________________________________________________ 22
Normal Operation __________________________________________________________ 22

GASMAX EC Operation & Maintenance Manual, Revision 3.5
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Alarm Operation – ALA M 1 and 2 _____________________________________________ 22
Alarm Operation – ALA M 3 __________________________________________________ 23
Sensor eplacement ________________________________________________________ 23
Sensor eplacement – emote Sensors _________________________________________ 25
Normal Maintenance ________________________________________________________ 25
7 USER MENUS ______________________________________________________ 26
Main Menu ________________________________________________________________ 26
System Configuration Page ___________________________________________________ 27
Measurement Name _______________________________________________________________ 27
Eunits ___________________________________________________________________________ 27
Zero (0%) ________________________________________________________________________ 27
Span (100%) ______________________________________________________________________ 27
Decimal Points ____________________________________________________________________ 27
Cal Span Value ____________________________________________________________________ 27
eadout Deadband ________________________________________________________________ 27
Track Negative ____________________________________________________________________ 27
Temp Compensation _______________________________________________________________ 28
Backup Config ____________________________________________________________________ 28
estore Config ____________________________________________________________________ 28
Upload Sensor Data ________________________________________________________________ 28
Cal Marker _______________________________________________________________________ 28
TX Sensor Life _____________________________________________________________________ 28
Alarm Settings Page _________________________________________________________ 29
Set Point _________________________________________________________________________ 29
Dead-Band _______________________________________________________________________ 29
ON Delay ________________________________________________________________________ 29
OFF Delay ________________________________________________________________________ 29
Low Trip _________________________________________________________________________ 29
Latching _________________________________________________________________________ 29
Display Event Log __________________________________________________________________ 30
Clear Event Log ___________________________________________________________________ 30

GASMAX EC Operation & Maintenance Manual, Revision 3.5
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Sensor settings page ________________________________________________________ 30
Install New Sensor _________________________________________________________________ 30
ecall Cal History __________________________________________________________________ 30
Input Type _______________________________________________________________________ 30
New Sensor ______________________________________________________________________ 30
ecent Cal _______________________________________________________________________ 30
CLOCK/DELAY SETUP Page ____________________________________________________ 31
Time ____________________________________________________________________________ 31
Date ____________________________________________________________________________ 31
Warm Up Delay ___________________________________________________________________ 31
Cal Purge Delay ___________________________________________________________________ 31
LCD CONT AST Adjustment Page ______________________________________________ 31
HELP Screen Page ___________________________________________________________ 31
DIAGNOSTICS Page __________________________________________________________ 31
Output Simulation _________________________________________________________________ 32
elay Test ________________________________________________________________________ 32
SYSTEM SECU ITY Page ______________________________________________________ 32
Contact Name ____________________________________________________________________ 32
Secure Level ______________________________________________________________________ 32
8 TECHNICIANS MENUS _______________________________________________ 33
XMITTE CONFIG Menu ______________________________________________________ 33
O2 / Toxic ________________________________________________________________________ 33
LEL / Current _____________________________________________________________________ 33
Output Zero / Span Trim ____________________________________________________________ 33
eal Time Clock ___________________________________________________________________ 33
Model ___________________________________________________________________________ 33
TECHNICAL PAGE Menu ______________________________________________________ 34
Set Balance _______________________________________________________________________ 34
Set Voltage _______________________________________________________________________ 34
Preamp Gain Set __________________________________________________________________ 35
Input Type _______________________________________________________________________ 35
Zero Cal Value ____________________________________________________________________ 36

GASMAX EC Operation & Maintenance Manual, Revision 3.5
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aw Min / Max Counts _____________________________________________________________ 36
Marker Menu _____________________________________________________________________ 36
9 TROUBLESHOOTING GUIDE ___________________________________________ 37
Toxic Sensor Indicates Fault or Overrange _______________________________________ 37
Toxic Sensor Will Not Calibrate ________________________________________________ 37
eceiving Device and GASMAX Displayed Values Don’t Match _______________________ 37
GASMAX Display Blank ______________________________________________________ 37
GASMAX Error Codes ________________________________________________________ 37
10 SPARE PARTS ____________________________________________________ 39
Display & Enclosure _________________________________________________________ 39
Sensor Head Accessories _____________________________________________________ 39
emote Sensor _____________________________________________________________ 40
11 DRA INGS AND DIMENSIONS ______________________________________ 41

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TABLE OF FIGURES
FIGU E 3-1: GASMAX EC TOXIC SENSO S .................................................................................................... 10
FIGU E 4-1: GASMAX EC EXPLOSION P OOF ENCLOSU E ........................................................................... 11
FIGU E 4-2: GASMAX EC EMOTE SENSO .................................................................................................. 12
FIGU E 4-3: GASMAX EC LOOP POWE WI ING .......................................................................................... 13
FIGU E 4-4: LOCAL SMA T TOXIC SENSO .................................................................................................. 14
FIGU E 4-5: GASMAX EC EMOTE SENSO WI ING .................................................................................... 15
FIGU E 4-6: GASMAX INT INSICALLY SAFE INSTALLATION .......................................................................... 16
FIGU E 4-7: GASMAX EC IS WI ING GUIDELINES ......................................................................................... 16
FIGU E 5-1: CALIB ATION SETUP ................................................................................................................. 19
FIGU E 5-2: CALIB ATION FLOWCHA T ...................................................................................................... 20
FIGU E 6-1: GASMAX EC DISPLAY SC EENS ................................................................................................. 21
FIGU E 6-2: GASMAX DATA DISPLAY SC EEN .............................................................................................. 22
FIGU E 6-3: GASMAX T END DISPLAY SC EEN ............................................................................................ 22
FIGU E 6-4: SENSO EPLACEMENT ............................................................................................................ 24
FIGU E 6-5: SMA T SENSO ECOGNITION SC EEN ................................................................................... 24
FIGU E 7-1: MAIN MENU FLOWCHA T ........................................................................................................ 26
FIGU E 7-2: SYSTEM CONFIG MENU ............................................................................................................ 27
FIGU E 7-3: SENSO LIFE T ANSMISSSION FO MAT ................................................................................... 28
FIGU E 7-4: ALA M SETTINGS MENU .......................................................................................................... 29
FIGU E 7-5: SENSO SETTINGS MENU ........................................................................................................ 30
FIGU E 7-6: CLOCK DELAY MENU ................................................................................................................. 31
FIGU E 7-7: CONT AST MENU ..................................................................................................................... 31
FIGU E 7-8: DIAGNOSTICS MENU ................................................................................................................ 32
FIGU E 7-9: SYSTEM SECU ITY MENU ......................................................................................................... 32
FIGU E 8-1: XMITTE CONFIG MENU .......................................................................................................... 33
FIGU E 8-2: TECHNICAL PAGE MENU ........................................................................................................... 34
FIGU E 8-3: SET GAIN TO UNITY MENU ....................................................................................................... 35
FIGU E 8-4: P EAMP GAIN SET MENU ......................................................................................................... 35
FIGU E 10-1: GASMAX EC + LOCAL SENSO SPA E PA TS .......................................................................... 39
FIGU E 10-2: GASMAX SENSO HEAD SPLASH GUA D & FLOW CELL ......................................................... 39
FIGU E 10-3: GASMAX EC EMOTE DI ECT SENSO HEAD ......................................................................... 40

GASMAX EC Operation & Maintenance Manual, Revision 3.5
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1SAFETY INFO MATION
Important – ead Before Installation
Users should have a detailed understanding of GASMAX EC operating and maintenance instructions. Use
the GASMAX EC only as specified in this manual or detection of gases and the resulting protection
provided may be impaired. ead the following WA NINGS prior to use.
WA NINGS
•The GASMAX EC gas monitor described in this manual must be installed, operated and
maintained in accordance with information contained herein. Installation in any hazardous area
must comply with all applicable restrictions, requirements and guidelines for said hazardous
areas. It is the end user customer’s final decision to ensure that the GASMAX EC is suitable for
the intended use.
•The GASMAX EC is designed and constructed to measure the level of certain gases in ambient air.
Accuracy in atmospheres containing steam or inert gases cannot be guaranteed.
•Always mount the sensor head vertically with the sensor head facing down.
•Do not paint transmitter or sensor assembly.
•Do not operate the GASMAX EC if its enclosure is damaged or cracked or has missing
components. Make sure the cover, internal PCB’s and field wiring are securely in place before
applying power.
•Do not expose the GASMAX EC to electrical shock or continuous severe mechanical shock.
Protect the GASMAX EC and related sensor assemblies from dripping liquids and high power
sprays.
•Calibrate with known target gas at start-up and check on a regular schedule, at least every 90
days. More frequent inspections are encouraged to spot problems such as dirt, oil, paint, grease
or other foreign materials on the sensor head.
•Periodically test for correct operation of the system’s alarm events by exposing the monitor to a
targeted gas concentration above the High Alarm set point.
•Use only for applications described within this manual.

GASMAX EC Operation & Maintenance Manual, Revision 3.5
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2GENE AL INFO MATION
Introduction
The GASMAX EC is a single channel fixed-point gas monitor designed to provide continuous monitoring of
toxic or combustible gases in hazardous areas. Gas values are displayed in calibrated engineering units as
well as bar graph or 30-minute trend graph format.
The GASMAX EC supports one local or remote mount sensors for
toxic gas. The advanced microcontroller, non-intrusive magnetic
interface and superior graphic LCD interface offers rapid setup,
simplified operation and enhanced diagnostics not found in previous
generation products. On-board non-volatile memory retains all
configuration data during power interruptions. A single loop-
powered 4-20 mA output allow for easy connection to control
systems or other alarm instrumentation.
Built-in user-prompted calibration makes it easy for one person to
perform calibration and maintenance without opening the enclosure
or declassifying the area. A battery-powered real-time clock and
event log allows the GASMAX EC to track calibration and alarm events for later recall on the LCD readout.
GASMAX Sensors
For toxic gases the GASMAX EC supports a wide range of electrochemical (“echem”) sensors. These
sensors use chemical reactions to sense the presence of gases such as hydrogen sulfide, chlorine, sulfur
dioxide and many others. Echem sensors output very low level signals; remote echem sensors should be
mounted no more than 15 feet from the GASMAX enclosure, the wiring should be three-conductor with
foil shield, and the wiring should be enclosed in metal conduit for maximum protection against
interference. If longer distance is required, the GASMAX offers a sensor-transmitter option for
electrochemical sensors that converts the output into a 4-20mA signal. Distances up to 500 feet are
practical with 4-20mA signals. Channel 1 on the GASMAX EC can be configured for direct echem or 4-
20mA input.
IMPO TANT: TOXIC SENSO S A E SUBJECT TO ACCELE ATED DETE IO ATION IF POWE IS NOT
SUPPLIED WITHIN 3 MONTHS OF SHIPMENT F OM GDS CO P.

GASMAX EC Operation & Maintenance Manual, Revision 3.5
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3SPECIFICATIONS
Power Input 10-30VDC at less than 0.75W
Display 64 x128 pixel LCD with engineering units, bargraph and 30-minute trend
Input Accepts microamp-level inputs from local or remote GDS Corp toxic or oxygen
deficiency sensors
Accuracy +/- 5% of full scale (typical)
Standard
Output
Two-wire 4-20mA loop powered current sink with fault and overrange indication.
Maximum loop resistance is 600 ohms with standard 24VDC supply
Temperature Electronics -40°C to +60°C. See Echem Sensor Manual for additional details
Memory On-board non-volatile memory retains all user settings
Housing Aluminum housing with epoxy paint standard; #316 stainless steel optional
Dimensions Width 5.4” (137 mm), Height 8” (203 mm), Depth 5” (127 mm)
Shipping weight 6.5 pounds (3 kg)
Approvals CSA Certified Division 1 & 2 Groups B, C, D. Suitable for explosion-proof installations
with flame arrestor. CSA Certified Division 1 & 2 Groups A, B, C, D. Intrinsically safe
when used with IS barrier #10-0263 (MTL 7787P+) or equivalent.
ATEX Certified EX II 2 G EEx d IIB + H2 T5
Warranty Two years on electronics, one year on sensor
10 Oxygen 22 Ethylene Oxide
11 Carbon Monoxide 23 Arsine
12 Chlorine 24 Silane
13 Chlorine Dioxide 25 Fluorine
14 Hydrogen 26 Phosgene
15 Hydrogen Sulfide 27 Hydrazine
16 Hydrogen Cyanide 28 Nitric Oxide
17 Hydrogen Chloride 29 Nitrogen Dioxide
18 Hydrogen Fluoride 30 Mercaptan
19 Sulfur Dioxide 31 Tetrahydrothiophene
20 Ammonia 32 Diborane
21 Ozone 33 Hydrogen Sulfide (Low H)
Figure 3-1: GASMAX EC Toxic Sensors