Rae RAEGuard EC User manual

RAEGuard
S
EC
Toxic Gas and Oxygen Transmitter
RAEGuard
S
LEL
Combustible Gas Transmitter
RAEGuard
S
IR
Non-Dispersive Infrared (NDIR)
Transmitter
User’s Guide
P/N 033-4117-E00 Rev A August 2009

RAEGuardSEC / LEL / IR User’s Guide
- READ BEFORE OPERATING -
This manual must be carefully read by all individuals who have
or will have the responsibility of using, maintaining, or servicing
this product. The product will perform as designed only if it is
used, maintained, and serviced in accordance with the
manufacturer’s instructions. The user should understand how
to set the correct parameters and interpret the obtained results.
CAUTION!
To reduce the risk of electric shock, turn the power off before
removing the instrument cover. Disconnect the power before
removing the sensor module for service. Never operate the
instrument when the cover is removed. Remove instrument
cover and sensor module only in an area known to be non-
hazardous.
WARNING!
The calibration of all newly purchased RAE Systems
instruments should be tested by exposing the sensors to known
concentration calibration gas before the instrument is used or
put into service. For maximum safety, the accuracy of the
RAEGuardSshould be checked by exposing the sensor(s) to
known concentration calibration gas every three (3) months.
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RAEGuardSEC / LEL / IR User’s Guide
Contents
1. General Information......................................................................... 3
1.1 General Specifications............................................................... 6
RAEGuardSEC Specifications ................................................. 6
RAEGuardSIR Specifications................................................... 7
RAEGuardSLEL Specifications................................................ 9
2. Operation....................................................................................... 10
2.1 Physical Description ................................................................ 11
2.2 Installation and Access Instructions ........................................ 11
Mounting.................................................................................. 12
Instrument Assembly Removal................................................ 13
Electrical Wiring....................................................................... 14
Instrument Assembly Installation............................................. 15
Earth Grounding Instructions................................................... 16
2.3 Display And User Interface...................................................... 18
User Interface .......................................................................... 18
Magnet Key ............................................................................. 18
Using The Magnet Key ............................................................ 19
System Initialization................................................................. 19
Reading Display ...................................................................... 20
Alarm Contacts ........................................................................ 20
2.4 Calibration ............................................................................... 21
Zero Calibration ....................................................................... 22
Span Calibration ...................................................................... 23
2.5 Advanced Menu (EC & LEL) ................................................... 25
2.6 Advanced Menu (IR)................................................................ 31
2.7 Restoring Default Values (EC & LEL) ...................................31
3. Theory of Operation....................................................................... 33
4. Maintenance .................................................................................. 35
5. Troubleshooting............................................................................. 35
Table A: EC Sensor configuration ................................................ 37
6. ModBus/RS-485 Information ......................................................... 38
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RAEGuardSEC / LEL / IR User’s Guide
1. General Information
RAEGuardSEC The RAEGuardSEC is a fixed electrochemical
detector for oxygen and toxic gas (CO, H2S, SO2, NO, NO2, Cl2, O2,
ClO2, NH3, PH3, HCN and ETO). It operates with voltages from 9 to
36 VDC and provides an analog (4 to 20mA) output signal and digital
(RS-485, ModBus) output signal within the corresponding ranges of
gas detection. The RAEGuardSEC uses an interchangeable
electrochemical smart sensor, which can be pre-calibrated
independently offline. Housed in an explosion-proof enclosure, the
RAEGuardSEC is equipped with a local digital display of the gas
concentration and unit of measurement, status LEDs, and function
keys for performing calibration.
RAEGuardSIR The RAEGuardSIR is fixed non-dispersive infrared
(NDIR) detector for hydrocarbon combustible gases, carbon dioxide,
and other gases, It operates with voltages from 9 to 36 VDC and
provides an analog (4 to 20mA) output signal and digital (RS-485,
ModBus) output signal within the corresponding ranges of gas
detection of 0 to 100% LEL or 0 to 50,000 ppm CO2. The RAEGuardS
IR uses a smart NDIR sensor, which can be pre-calibrated
independently offline. Housed in an explosion-proof stainless steel
enclosure, the RAEGuardSIR is equipped with a local digital display
of the gas concentration, status LEDs, and function keys for
performing calibration.
RAEGuardSLEL The RAEGuardSLEL is a fixed, highly poison-
resistant catalytic bead lower explosion limit (LEL) sensor for
combustible gases detection. It operates with voltages from 9 to 36
VDC and provides an analog (4 to 20mA) output signal and digital
(RS-485, ModBus) output signal within the corresponding range of 0
to 100% LEL. The RAEGuardSLEL uses a smart LEL sensor, which
can be pre-calibrated independently offline. Housed in an explosion-
proof stainless-steel enclosure, the RAEGuardSLEL is equipped with
a local digital display of the gas concentration, status LEDs, and
function keys for performing calibration.
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RAEGuardSEC / LEL / IR User’s Guide
Key features:
•Interchangeable smart electrochemical sensor that can be
calibrated offline
•4 to 20mA analog output signal.
•RS-485 digital communication in ModBus Protocol
•Explosion-proof stainless-steel enclosure for hazardous
environment applications
•Magnetic-key interface eliminates the need to open the explosion-
proof housing when adjusting parameters.
•LCD and status/error LEDs
•LED alarms when High or Low alarm point is reached
•Operation at 9 to 36 VDC
•Two dry contacts (<30V, 2A) normally open (or normally closed),
one for High and Low alarm, another for Fault alarm
Applications:
•Waste water treatment plants
•Petroleum and natural gas fields
•Marine and offshore oil wells
•Refineries and petrochemical plants
•Solvent recovery systems
•Chemical plants
•Industrial safety
•Sewers and pipelines
•Pulp & paper plants
•Heavy industry
•Power plants
•Steel mills
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RAEGuardSEC / LEL / IR User’s Guide
Hazardous Location Classification:
ATEX: II 2G Ex d IIC T6 -40° C < Tamb < +60° C
Complies with EN60079-0 :2004, EN60079-1 :2004
Example Of Name Plate On RAEGuardSModels:
Notes:
Sensor Name is replaced by the actual sensor name.
FGM-1XXXS is replaced by model number.
* < 4
** Optional
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RAEGuardSEC / LEL / IR User’s Guide
1.1 General Specifications
RAEGuardSEC Specifications
Size 7.4" L x 5.9" W x 4.3" H
188mm x 150mm x 109mm
Weight 7.7 lbs
3.5 kg
Detector Off-line pre-calibrated interchangeable smart
electrochemical sensor
Calibration 2-point calibration
Certification ATEX: II 2G Ex d IIC T6 -40° C < Tamb < +60° C
Complies with EN60079-0 :2004, EN60079-
1 :2004
IP Rating IP-65
Power 9 to 36VDC, max 40mA at 24V or 1W
Output 4-20mA
RS-485, baud-rate 4.8, 9.6 or 19.2kb/sec
Sampling Internal diffusion
Display 7-segment, 4-digit LCD and 4 color-coded
alarm LEDs
User Interface Magnetically accessed keys for non-intrusive
calibration and adjustment
Temperature -40° C to 60° C
Humidity 0% to 95% relatively humidity (non-condensing)
Pressure 0.9 to 1.1 Atm
Dry contact Max 30V, 2A
Dry Contacts 30V, 2A, normally open (or normally closed), one for High and Low alarm, another for Fault
alarm
Terminal AWG 24-12
Mounting 2 holes, 5.25" (133mm) from center to center
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RAEGuardSEC / LEL / IR User’s Guide
RAEGuardSIR Specifications
Size 6.6” L x 5.9” W x 4.3” H
168mm x 150mm x 109mm
Weight 7.7 lbs or 3.5 kg
Detector Protected, Off-line pre-calibrated,
interchangeable smart NDIR sensor
Calibration 2 point calibration
Range CO2：0 to 50000 ppm
CH4：0 to 100% LEL
Resolution
CO2：
When CO2< 10000 ppm，resolution is 1 ppm；
When CO2 >10000 ppm，resolution is 1000 ppm
CH4：resolution is 1% LEL.
Response Time
(T90) T90≤30 seconds
Certification ATEX: II 2G Ex d IIC T6 -40° C < Tamb < +60° C
Complies with EN60079-0 :2004, EN60079-1 :2004
IP Rating IP-65
Power 9 to 36VDC, max 60mA at 24V or 1.5W
Output 4-20mA
RS-485
Baud rate: 4.8, 9.6 or 19.2kb/sec
Sampling Internal diffusion
Display 7-segment, 4-digit LCD
4 color-coded LEDs
User Interface Magnetically accessed keys for non-intrusive
calibration and adjustment
Operating
Temperature CO2: -20° C to +60° C
CH4: -40° C to +60° C
Humidity 0 to 95% relative humidity (non-condensing)
Pressure 0.9 to 1.1 Atm
Dry Contacts 30V, 2A, normally open (or normally closed), one
for High and Low alarm, another for Fault alarm
Terminal AWG 24 to 12 (diameter 0.5mm to 2mm)
Mounting 2 holes 5.25" (133mm), from center to center
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RAEGuardSEC / LEL / IR User’s Guide
RAEGuardSIR Default Sensor Settings
Gas Range Resolution Span Gas
Carbon Dioxide (CO2)0to 50,000
ppm
10 ppm or
1000 ppm
2000 ppm to
10000 ppm
Methane (CH4)0to 100%
LEL 1% LEL 20% LEL to
99% LEL
Note: When CO2< 10000 ppm, the LCD displays the reading. When
CO2>10000, the LCD displays X.XE4 (which represents X.X x 104).
For example, when the monitor display 1.5E4, it means 15000 ppm;
when the LCD displays 3.6E4, it means 36000 ppm. The LCD on the
RAEGuardSIR CH4displays the %LEL (percentage of LEL) reading.
For example, when the LCD displays 25, it means 25% LEL; when
the LCD displays 75, it means 75% LEL.
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RAEGuardSEC / LEL / IR User’s Guide
RAEGuardSLEL Specifications
Size 6.6” L x 5.9” W x 4.3” H
168mm x 150mm x 109mm
Weight 7.7 lbs or 3.5 kg
Detector Protected, Off-line pre-calibrated,
interchangeable catalytic bead smart LEL
sensor
Calibration 2 point calibration
Range 0 to 100% LEL
Resolution 1% LEL
Response Time
(T90) <15 seconds to 90% of reading to 50% LEL
methane
Certification ATEX: II 2G Ex d IIC T6 -40° C < Tamb < +60° C
Complies with EN60079-0 :2004, EN60079-
1 :2004
IP Rating IP-65
Power 9 to 36VDC, max 60mA at 24V or 1.5W
Output 4-20mA
RS-485, Baud-rate 4.8, 9.6 or 19.2kb/sec
Sampling Internal diffusion
Display 7-segment, 4-digit LCD
4 color-coded LEDs
User Interface Magnetically accessed keys for non-
intrusive calibration and adjustment
Operating
Temperature -40° C to +60° C
Humidity 0 to 95% relative humidity (non-condensing)
Pressure 0.9 to 1.1 Atm
Dry Contacts 30V, 2A, normally open (or normally closed),
one for High and Low alarm, another for
Fault alarm
Terminal AWG 24 to AWG 12 (diameter 0.5mm to
2mm)
Mounting 2 holes, 5.25" (133mm) from center to
center
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