EC-Gold-NEM Gas Concentration Transmitter

EC-Gold-NEM
Gas Concentration Transmitter
User Manual
Technical Support
Continental North America Toll Free 1-(800) 387-9487
Ph: +1 (905) 829-2418 Fx: +1 (905) 829-4701
A Product of Arjay Engineering Ltd.
Oakville, Ontario, Canada
www.ArjayEng.com
www.EnmetGasDetection.com
Model: EC-GOLD-NEM
ECGoldNEMUm04.DOC
Rev: 0.4
TABLE OF CONTENTS
1.0 2.0 3.0 4.0 INSTRUMENT OVERVIEW ............................................................................................3 1.1 FEATURES ........................................................................................................3 1.2 DESCRIPTION...................................................................................................3 1.3 SPECIFICATIONS .............................................................................................5 INSTALLATION...............................................................................................................6 2.1 MECHANICAL INSTALLATION .........................................................................6 2.2 ELECTRICAL INSTALLATION ..........................................................................7 STARTUP AND CONFIGURATION ...............................................................................9 3.1 NOTES ON THE USER INTERFACE OPTIONS ..............................................9 3.2 STARTUP ..........................................................................................................10 3.3 USING THE DIP SWITCH FOR SETUP AND CALIBRATION..........................10 3.3.1 ENTERING SETUP MODE .................................................................10 3.3.2 SETTING CONFIGURATION..............................................................10 3.3.3 SETTING THE HIGH ALARM .............................................................11 3.3.4 SETTING THE LOW ALARM ..............................................................11 3.3.5 SETTING THE CALIBRATION GAS CONCENTRATION ..................11 3.3.6 SETTING THE NETWORK ADDRESS ...............................................12 3.3.7 EXITING SETUP MODE .....................................................................13 CALIBRATION ................................................................................................................14 4.1 CALIBRATION NOTES ......................................................................................14 4.2 SINGLE POINT CALIBRATION ..........................................................14 4.3 DUAL POINT CALIBRATION ..............................................................15 5.0 PUSH TO TEST FEATURE ............................................................................................17 6.0 TROUBLESHOOTING ....................................................................................................18 7.0 CONTROLLER SETTINGS SHEET ...............................................................................19 -2-
ECGoldNEMUm04.DOC
Model: EC-GOLD-NEM
1.0
INSTRUMENT OVERVIEW
1.1
FEATURES
1.2
Rev: 0.4

Single gas transmitter for a large variety of gas types.

Carbon Monoxide sensor has expected life of 5 years min. (3 year guarantee)

Other sensors have expected life of 2 years (1 year guarantee)

Output may be user selectable for analog (4-20mA / 2-10V) or Arjay’s Discrete Voltage Output
(DVO).

Convenient pushbutton calibration.

User selectable for Single or Dual Point calibration

High, Low, and System Fault indication

User selectable High and Low Alarm levels

Modbus protocol via RS-485 for access by Arjay/Enmet Central Access Panel or compatible
system

User specified custom features may be added by contacting Arjay Engineering Ltd.
DESCRIPTION
The EC-Gold transmitter may be used to sense a large variety of gases including CO, NO2, Ammonia,
Chlorine, and Hydrogen Sulfide (H2S), and Oxygen.
The EC-GOLD sensor offers a Push To Test feature, which allows the user to check his/her alarm points
to verify if the fans are working without having to gas the sensor.
The analog output may be field configured either as a 4-20mA / 2-10V output or as an Arjay/Enmet
Discrete Voltage Output (DVO). The DVO is a 4 level output: 0V = ok, Low Alarm = 1.8V, High Alarm =
2.8V, Sensor Fault = 10V. The DVO is a common signaling method: any sensor in a zone triggers the
corresponding Low, High or Sensor Fault alarm at the Arjay/Enmet ISA-66RLU alarm panel.
In Discrete Voltage Output mode, the transmitter may be connected as part of a zone connected to an
Arjay/Enmet ISA-66RLU zone system. In Analog mode, the transmitter puts out a 4-20mA output
proportional to the adjustable Span value.
Independent of the output type selected, the transmitter may also be accessed by an Arjay/Enmet Central
Access Panel (modbus protocol) to form part of a networked gas monitoring system where up to 128
transmitters may be linked on a 2-wire RS485 connection. The networked approach allows more
complex control strategies based on the gas concentrations of a number of transmitters.
24VDC
2 Wire
2 Wire RS-485 Network
ENMET EC-GOLD
CENTRAL ACCESS PANEL
(CAP)
UP TO 128 TRANSMITTERS ON THE NETWORK
4-20mA
or
Enmet RLU output
Alarm LED's
Vents
BLOCK.DSF
Calibration / Config
Push to test
pushbutton (from bottom)
pushbutton (from bottom)
Sensor access for calibration
Depending on sensor, access is
either from bottom or front.
EC-GOLD NETWORK
Figure 1.0
-3-
APPLICATION
ECGoldNEMUm04.DOC
Model: EC-GOLD-NEM
3 Wire Discrete Voltage Output shielded connection
Rev: 0.4
To other sensors
RS-485
Alarm LED's
ENMET ISA 66RLU
ZONE PANEL
BLOCK.DSF
Vents
Calibration / Config
Push to test
pushbutton (from bottom)
pushbutton (from bottom)
Sensor access for calibration
Depending on sensor, access is
either from bottom or front.
EC-GOLD
3 Wire Discrete Voltage Output shielded connection
RLU APPLICATION
To other sensors
RS-485
Alarm LED's
GAS ALERT
Vents
BLOCK.DSF
Calibration / Config
Push to test
pushbutton (from bottom)
pushbutton (from bottom)
Sensor access for calibration
Depending on sensor, access is
either from bottom or front.
EC-GOLD
GAS ALERT APPLICATION
3 Wire Connection:
1- 24V
2- Ground
3- 4-20mA or Voltage output
RS-485
Alarm LED's
Vents
Calibration / Config
Push to test
pushbutton (from bottom)
pushbutton (from bottom)
Sensor access for calibration
Depending on sensor, access is
either from bottom or front.
BLOCK.DSF
EC-GOLD 4-20mA / DC VOLTAGE OUTPUT APPLICATION
TYPICAL APPLICATIONS
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ECGoldNEMUm04.DOC
Model: EC-GOLD-NEM
1.3
Rev: 0.4
SPECIFICATIONS
OPERATION
The EC-Gold is a single channel gas concentration transmitter. A variety
of gases may be sensed when fitted with the appropriate sensor. The
output may be field selected to be one of two types: Analog 4-20mA / 210V, or Arjay’s RLU Discrete Voltage Output which is used in zoned
alarm systems. In addition, an RS-485 interface is available so that the
EC-Gold can be accessed by an Arjay/Enmet network master (Central
Access Panel or CAP) or user modbus compatible system.
USER INTERFACE
Calibration and setup DIP switches, pushbutton, and LED status lights.
Self Test
Pushbutton. Only for units with CO sensor.
Network
RS-485 modbus protocol. Used either with the ARJAY/ENMET CAP unit
or via third party, modbus compatible systems.
INPUTS
Integral Sensors
Single sensor. Electrochemical type for gases including CO, H2S, NH3,
NO, NO2 and Cl2, and O2.
OUTPUTS
mA output
DC Voltage output
mA / Voltage output
RLU DV output
Alarms
Alarm Indication
When configured for Analog output: 4-20mA into 650 ohms max.
When configured for Voltage output: 2-10V proportional to calibrated
range.
0.1% resolution – non-isolated.
When configured for RLU Discrete Voltage Output mode:
0V = No Alarm, 1.8V = Low Alarm, 2.8V = High Alarm, 2.8V = HI/HI
Alarm.
3 alarms (High, Low and Sensor Fault).
High (Red), Low (Yellow), and a 2 color LED for Sensor Fault (Red) and
No Alarms (Green). The 2 color LED is also used to flash calibration
errors (Red for ~2 seconds after an unsuccessful calibration).
PERFORMANCE
Accuracy
±2% of Full Scale Range (the accuracy is limited by the sensors – the
electronic accuracy is better than 1%.
POWER
15VDC - 24VDC @ 0.100A max
MECHANICAL SPECIFICATIONS
Enclosure
Dimensions
Weight
Nema 1 wall mount
7.75” [197mm]H x 3” [76mm]W x 3” [76mm]D
0.3 kg
ENVIRONMENTAL SPECIFICATIONS
Operating Temp.
Relative Humidity
-20°C to +55°C
90% max. with no condensation.
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ECGoldNEMUm04.DOC
Model: EC-GOLD-NEM
2.0
INSTALLATION
2.1
MECHANICAL INSTALLATION
Rev: 0.4
MECHANICAL INSTALLATION
BASE
Dual 3/4" & 1/2" diam.
knock-outs for top entry
cabling.
FRONT COVER
TOP VIEW
2.25"
7.75"
5.25"
Dual 3/4" & 1/2" diam.
knock-outs for rear entry
cabling.
EC GOLD
TRANSMITTER
BOARD
6.00"
3.00"
Mounting holes
(4 Places)
BASE
FRONT COVER
MECHINST.DSF
Figure 2.0
Locate the EC-Gold on a vertical surface away from drafts, open doors or windows, condensation or
dripping moisture.
The vertical placement (above the floor) depends on the gas being monitored. For CO, the unit should be
located within the breathing zone: about 4 - 5 feet above the finished floor*. For other gases, refer to an
Arjay Engineering representative.
* Check local building codes (i.e. Ontario Building code requires mounting 2’11” to 3’11”).
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ECGoldNEMUm04.DOC
Model: EC-GOLD-NEM
ELECTRICAL INSTALLATION
ELECTRICAL INSTALLATION
OUT
!
RS-485 NETWORK
Use good installation practice!
Do not run high voltage cables in the
same conduit as signal wires.
+24VDC
- +
For Networked applications, the 2 wire RS-485 network
connects to the Enmet Central Access Panel.
- +
5 4 3 2 1
For RLU Loop (alarm only) applications, the Output is
configured for Loop output and connects to the corresponding
Zone connection on the ISA-66RLU board.
EC GOLD
TRANSMITTER
BOARD
ENMET EC GOLD
CENTRAL ACCESS PANEL or
HAND HELD CALIBRATOR
4 Wires + shield
(Shld connected at
this point only)
GND
24VDC
DD+
RS-485
(2 Wires)
DD+
OUT
GND
24V
54321
DD+
OUT
GND
24V
54321
DD+
OUT
GND
24V
54321
EC GOLD
Transmitter
EC GOLD
Transmitter
EC GOLD
Transmitter
ALARM RELAYS
Up to 128 EC Gold transmitters on the network
4 3 2 1 ZONE5
4 3 2 1 ZONE4
4 3 2 1 ZONE3
4 3 2 1 ZONE2
ENMET ISA-66RLU
4 3 2 1 ZONE1
For clarity only Zone5 is shown connected.
Sensors per zone: Typically around 20 depending on
wires sizes and lengths.
SGND connection (on ISA-66RLU) NOT made to
EC GOLD transmitters
24V
PGND
VSIG
SGND N/C
54321
DD+
OUT
GND
24V
54321
DD+
OUT
GND
24V
54321
To other
Zones
DD+
OUT
GND
24V
2.2
Rev: 0.4
EC GOLD
Transmitter
EC GOLD
Transmitter
EC GOLD
Transmitter
ELECINST.DSF
Figure 2.1
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ECGoldNEMUm04.DOC
Model: EC-GOLD-NEM
Rev: 0.4
ELECTRICAL INSTALLATION
OUT
!
Use good installation practice!
Do not run high voltage cables in the
same conduit as signal wires.
RS-485 NETWORK
+24VDC
- +
For Networked applications, the 2 wire RS-485 network
connects to the Enmet Central Access Panel.
- +
5 4 3 2 1
For Discrete Voltage Output (DVO for alarm only) applications,
the EC Gold Output is configured for DVO mode and connects
to the corresponding Zone connection on the ISA-66RLU
board or to the Gas Alert DVO connector.
EC GOLD
TRANSMITTER
BOARD
The Gas Alert only accommodates a single zone.
Sensors per zone: Typically around 20 depending on
wires sizes and lengths.
SGND connection (on Gas Alert) NOT made to
EC GOLD transmitters
4321
DVO Connector
GAS ALERT
24V
PGND
VSIG
SGND N/C
DD+
OUT
GND
24V
54321
DD+
OUT
GND
24V
54321
DD+
OUT
GND
24V
54321
EC GOLD
Transmitter
EC GOLD
Transmitter
EC GOLD
Transmitter
ELECINST.DSF
Figure 2.2
All user connections are via mating plug/receptacle connectors to make installation and service easier.
CAUTION:
THE UNIT HOUSES SENSITIVE ELECTRONIC COMPONENTS AND SHOULD BE HANDLED WITH CARE. IF
PUNCHING OR DRILLING THROUGH THE ENCLOSURE WALLS IS NECESSARY MAKE SURE THAT THE
INTERNAL ELECTRONIC MODULES ARE SHIELDED FROM DEBRIS ESPECIALLY METAL PARTICLES.
PLEASE MAKE SURE THAT THE CONNECTIONS HAVE THE POLARITY AS INDICATED OR THE CONTROLLER
MAY BE DAMAGED.
USE GOOD INSTALLATION PRACTICE! DO NOT RUN HIGH VOLTAGE CABLE IN THE SAME CONDUIT AS
SIGNAL WIRES.
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ECGoldNEMUm04.DOC
Model: EC-GOLD-NEM
3.0
Rev: 0.4
STARTUP AND CONFIGURATION
USER INTERFACE OVERVIEW
SENSOR BOARD
Gnd
D-
D+
2
+24V
mA / Vout
ON
1
3
Test
Points
Gnd
1
2
3
4
5
TB1
4
DVO Ext
5
DVO Int
6
High Alarm
Low Alarm
Status (2 color)
1
2
7
7 POSITION DIP SWITCH
RS-485
3
4
5
6
The DIP switch and the
Calibration pushbutton are
used to configure / calibrate
the unit.
7
Green
Green blinking (ON and OFF)
Orange (Red & Green both ON)
Red (On for 2 seconds only)
Red (Steady ON)
Push to Test
pushbutton
Calibration
pushbutton
STATUS LED COLOR
Push to Test
pushbutton
Calibration
pushbutton
Gas Sensor
CO sensor shown for example
Push to Test only available
when used with CO sensor
MEANING
Instrument ok, no faults. Will remain green for High or Low Alarms
In Configuration entry mode or while waiting for 2nd Calibration point.
Calibration request acknowledge - while cal pushbutton pressed
Calibration error or user error.
Instrument failure / Sensor Fault condition
ECGoldSmtUserInt.dsf
Figure 3.0
3.1
NOTES ON THE USER INTERFACE OPTIONS
The EC-Gold may be configured and calibrated using either of 2 methods:
1. Using the integral DIP switch and Calibration pushbutton. The EC-Gold front cover must be
removed to access the DIP switch. For calibration only, the pushbutton is accessible without
removing the front cover.
2. Using Arjay’s optional 2000-CAL hand held calibrator. The calibrator communicates with the ECGold via the RS-485 connection using the modbus protocol. The calibrator’s LCD and keypad
offer a more convenient method of setting up and calibrating the EC-Gold unit. See the 2000CAL hand held calibrator manual for details if using it instead.
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ECGoldNEMUm04.DOC
Model: EC-GOLD-NEM
3.2
Rev: 0.4
STARTUP
Power up the unit. The status LED should be green. The High and Low alarm LED’s should go off in
less than a minute.
Note: all of the following settings are preset at the factory as per the customer
requirements. The settings are listed on the packing slip and may be entered in
the controller setting of this manual for future reference. The following
procedures should only be followed if changes are required.
3.3
USING THE DIP SWITCH FOR SETUP AND CALIBRATION
3.3.1
ENTERING SETUP MODE
Set DIP switches 1-6 (switch 7 is not important here) to the ON position, and press the
Calibration pushbutton. The Status LED starts to blink Green indicating the system is now
ready to accept configuration changes.
ON
1
3.3.2
2
3
4
5
6
7
SETTING CONFIGURATION
1.
While the Status LED is blinking green, set the DIP switch as follows:
MODE SETTINGS
ON
1
2
3
4
5
6
4
Sensor supports self tests
Sensor does not support self tests
5
Single point Cal
2 Point Cal
6
Continuous output mode - For mA output Sw7=Off, V out Sw7=On
DVO (Discrete Voltage Output) mode. This requires Sw7 to be set for voltage output (On).
2.
Single Point / Dual Point Calibration: The default position is Single Point Calibration.
A Single Point calibration assumes the instrument has already been zeroed
successfully. This mode saves calibration time. The Dual Point calibration is selected
if the sensor has not been successfully zeroed, or if a new sensor is installed in the
field. Set switch 5 On for Single Point and Off for Dual Point calibration.
3.
Output Mode: In Analog output mode, the output is proportional to the gas
concentration. In Discrete Voltage Output mode, the output is set to one of 4 step
values based on alarms and is compatible with Arjay’s ISA 66RLU/Gas-Alert systems.
Notes:

Wire connections to the OUT terminal are dependent on the type of Output
mode selected.

When configured for mA out, the transmitter does not become a 2 wire Loop
Powered transmitter. The mA output is referenced to the Ground terminal
(Terminal #2 –see Electrical installation for terminal number details).
For Analog output, switch 6 should be On and switch 7 should either be Off for 420mA output, or On for voltage output (2V – 10V).
For RLU Discrete Voltage output, switch 6 should be in the Off position, and switch 7
should be in the On position.
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ECGoldNEMUm04.DOC
Model: EC-GOLD-NEM
Rev: 0.4
Note: Switch 7 acts immediately and does not require configuration mode to be
entered, or the Cal pushbutton to be pressed to take effect. It can be changed at
any time.
After switches 4 – 6 are set as required, press the Cal pushbutton to lock in the values.
3.3.3
SETTING THE HIGH ALARM
The EC-Gold will register a High Alarm condition when the sensor detects a gas
concentration equivalent or exceeding this value.
1. While the Status LED is blinking green, set the DIP switch as follows:
SET HIGH ALARM FUNCTION
4 56
ON
1
2
3
4
5
6
SWs 4-6 set 1 of 8 different High Alarm values:
4 56
code 0 = 5
code 4 = 75
code 1 = 10
code 5 = 100
code 2 = 20
code 6 = 150
code 3 = 50
code 7 = 200
2. Switches 4-6 should be set as per the desired High Alarm ppm value. For example to
set the High Alarm value to 50 ppm, set switch 4 On, and switches 5 and 6 Off.
3. Press the Cal pushbutton to lock in the value.
3.3.4
SETTING THE LOW ALARM
The EC-Gold will register a Low Alarm condition when the sensor detects a gas
concentration equivalent or exceeding this value.
1. While the Status LED is blinking green, set the DIP switch as follows:
SET LOW ALARM FUNCTION
4 56
4 56
ON
1 2 3 4 5 6
SWs 4-6 set 1 of 8 different Low Alarm values:
code 0 = 1
code 4 = 20
code 1 = 2
code 5 = 25
code 2 = 3
code 6 = 35
code 3 = 10
code 7 = 50
2. Switches 4-6 should be set as per the desired Low Alarm ppm value. For example to
set the Low Alarm value to 35 ppm, set switches 4 and 5 Off, and switch 6 On.
3. Press the Cal pushbutton to lock in the value.
3.3.5
SETTING THE CALIBRATION GAS CONCENTRATION
This value tells the EC-Gold what the value of gas concentration will be used during
calibration.
1. While the Status LED is blinking green, set the DIP switch as follows:
SET CAL CONCENTRATION FUNCTION
1
2
3
4
5
4 56
4 56
ON
6
SWs 4-6 set 1 of 8 different Cal2 values:
- 11 -
code 0 = 5
code 4 = 35
code 1 = 10
code 5 = 50
code 2 = 20
code 6 = 75
code 3 = 25
code 7 = 100
Model: EC-GOLD-NEM
ECGoldNEMUm04.DOC
Rev: 0.4
2. Switches 4-6 should be set as per the desired calibration gas ppm value. For example
to set the value to 100 ppm, set switches 4, 5, and 6 Off.
3. Press the Cal pushbutton to lock in the value.
3.3.6
SETTING THE NETWORK ADDRESS
This value is only used in network applications. Each EC-Gold transmitter connected on a
network must have a unique address. Network problems will result if 2 or more
transmitters have identical addresses.
2 34 5 6
SET RS-485 ADDRESS FUNCTION
ON
1 2 3 4 5 6
SWs 2-6 set 1 of 31 different addresses
2 34 5 6
2 34 5 6
2 34 5 6
=1
=9
= 17
= 25
=2
= 10
= 18
= 26
=3
= 11
= 19
= 27
=4
= 12
= 20
= 28
=5
= 13
= 21
= 29
=6
= 14
= 22
= 30
=7
= 15
= 23
= 31
=8
= 16
= 24
1. While the Status LED is blinking green, set the DIP switch as follows:
2. Switches 2-6 should be set as per the desired number between 1 and 31. For example
to set the address to 5, set switches 2, 3, and 5 On and switches 4 and 6 Off. Note: the
maximum address that can be entered via the DIP switches is 31. To set values up
to 128, use the Arjay/Enmet EC-Gold hand held calibrator.
3. Press the Cal pushbutton to lock in the value.
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Model: EC-GOLD-NEM
3.3.7
ECGoldNEMUm04.DOC
Rev: 0.4
EXITING SETUP MODE
After all configuration is done, the setup mode must be exited for normal operation. Also,
calibration cannot be done via the Calibration pushbutton while in setup mode.
To exit setup mode (i.e. Status LED is blinking green), set the DIP switches 1-6 (switch 7 is
not important) to the ON position, and press the Calibration pushbutton. The Status LED
should remain steady green.
ON
1
2
3
4
5
6
7
IMPORTANT: after exiting the setup mode, do not leave the DIP switches (1-6) in the
ON position as shown above. This will cause entry to Setup mode if calibration is
attempted (i.e. if Calibration pushbutton is pressed). Set at least one switch (1-6) in
the off position. Typically, switch 6 may be set to the OFF position.
FOR EXAMPLE, LEAVE THE DIP SWITCH IN THE FOLLOWING
POSITION FOR NORMAL OPERATION:
TYPICAL SETTING FOR NORMAL OPERATION
ON
1
2
3
4
5
6
7
THIS COMPLETES THE STARTUP AND CONFIGURATION
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ECGoldNEMUm04.DOC
Model: EC-GOLD-NEM
4.0
CALIBRATION
4.1
CALIBRATION NOTES
Rev: 0.4
The EC-Gold may be calibrated using either a Single Point or Dual Point
calibration procedure, but is factory set for a single point calibration i.e.
calibration can be performed without removing the cover.
The Calibration pushbutton may be accessed using a screwdriver or other fine
tool – See Figure 3.1 for the location of the access hole.
A full Dual Point calibration is always performed at the factory and involves zeroing the sensor in clean
air, then calibrating at a preset gas concentration. The Single Point calibration is typically used in the
field since it is more convenient. Also, it does not require clean air as one of the calibration points, since
clean air cannot be guaranteed in all installations. A Single Point calibration assumes the unit has
already been zeroed. This is always true for new units from the factory.
CALIBRATION
EC-GOLD
Flowrate regulator
preset for 0.5Lpm
Flow ON/OFF
knob
Calibration
Push button
access hole
EC-Gold
Calibration
Port
Male, Quick Disconnect
tube inserted into ECGold Calibration Port.
6 feet of 5/16" O.D. x 3/16" I.D.
flexible, clear tubing.
CAL GAS CANISTER
CAL.DSF
Figure 3.1
4.2
SINGLE POINT CALIBRATION
The EC-Gold must be configured for Single Point calibration, and the calibration gas
concentration value must be known. The unit comes factory set for Single Point Calibration
and 100 ppm CO or 10 ppm NO2. If either setting is in doubt, then see section 3 to set
these values.
1.
Determine what Calibration gas concentration the EC-Gold is expecting. This value is
listed on the packing slip and may be recorded in the back of the user manual in the
CONTROLLER SETTINGS sheet for future reference. This value can be changed at
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Model: EC-GOLD-NEM
ECGoldNEMUm04.DOC
Rev: 0.4
any time as described in SETTING THE CALIBRATION GAS CONCENTRATION
section described earlier.
4.3
2.
The gas sensor is mounted directly behind the Calibration Port in the middle of the front
plate of the EC-Gold housing [See Fig. 3.1]. Insert the Quick Disconnect tube into the
EC-Gold’s Calibration Port.
3.
Start gassing the sensor by opening the valve on the canister. The flow rate is preset
to 0.5 Lpm (or ~1 SCFH (Standard Cubic Foot per Hour). Wait about 90 seconds.
4.
Press and hold the calibration pushbutton (via the access hole – see Fig. 3.1) until the
Status LED glows orange acknowledging the calibration request. Release the
pushbutton.
5.
If the Status LED does not glow orange, and starts blinking green after the
Calibration pushbutton is released, then the DIP switches (1-6) are probably set to
Enter Setup Mode i.e. all of them are set to ON. If this is the case, shut off the
calibration gas and press the Calibration pushbutton to exit the Setup Mode, then set
DIP switch 6 to OFF.
6.
If the Status LED glows orange, and starts blinking green after the Calibration
pushbutton was released, then the EC-Gold is in Dual Point calibration mode. First,
press the Calibration pushbutton again until it glows orange then release it. The Status
LED will glow red for ~3 seconds indicating that the calibration was unsuccessful (no
change in gas concentration for a Dual Point calibration). The unsuccessful calibration
does not change the EC-Gold calibration values. Go to section 3.0 to change the
calibration type to Single Point, and then attempt calibration again.
7.
If the Status LED remains green after the Calibration pushbutton is released,
then the Calibration has been successfully completed. If the calibration was
successful, the Status LED remains green. If there was a calibration error such as not
enough change for the gas concentration used, then the Status LED shows red for
about 2-3 seconds before reverting back to green. For unsuccessful calibrations, the
original calibration values remain unchanged. For example, if the EC-Gold calibration
gas is set as 100 ppm via the DIP switches (this is described earlier), but the actual
gas used is only 20 ppm then the calculated sensitivity will be out of allowed limits and
will cause a calibration error. The Status LED will light red for 2-3 seconds, but the
new erroneous calibration values will be discarded.
DUAL POINT CALIBRATION
This procedure is typically done at the factory. The Dual Point calibration not only trims the
sensitivity (like a Single Point calibration), but also zeroes the reading i.e. 0 ppm in clean air.
The EC-Gold must be configured for Dual Point calibration, and the calibration gas
concentration value must be known. If either setting is in doubt, then see section 3 to set
these values.
The Dual Point calibration is carried out if the EC-Gold must be zeroed in the field (i.e. a
new sensor has been installed). This is the procedure:
1. Determine what Calibration gas concentration the EC-Gold is expecting for the second
point – the first point is always assumed to be 0 ppm. This value is listed in the back of
the user manual in the CONTROLLER SETTINGS sheet. This value can be changed at
any time as described in SETTING THE CALIBRATION GAS CONCENTRATION
section described earlier.
2. Important: first make sure that the ambient air around the sensor is clean i.e. it has no
traces of the gas being monitored. This can be difficult in places where there are
vehicles etc. In applications where the ambient air is not guaranteed to be clean, use a
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Model: EC-GOLD-NEM
ECGoldNEMUm04.DOC
Rev: 0.4
compressed air calibration canister and apply the air to the sensor as described below
for gassing the sensor with the second point.
3. After making sure that the sensor is in clean air (either ambient or from a canister),
press and hold the calibration pushbutton until the Status LED glows orange
acknowledging the calibration request for the first point.
4. If the Status LED does not glow orange, and starts blinking green after the
Calibration pushbutton is released, then the DIP switches (1-6) are probably set to
Enter Setup Mode i.e. all of them are set to ON. If this is the case, press the Calibration
pushbutton to exit the Setup Mode, then set DIP switch 6 to OFF. Attempt calibration
again from step 3.
5. If the Status LED glows orange, and then glows red for ~3 seconds after the
Calibration pushbutton is released, then the EC-Gold is in Single Point Calibration
mode. Go to section 3.0 to change the calibration type to Dual Point, and then attempt
calibration again from step 3.
6. If the Status LED now starts blinking Green, the first point of the Dual Point
calibration has been entered. The EC-Gold is now expecting the second point.
7. The gas sensor is mounted directly behind the Calibration Port in the middle of the front
plate of the EC-Gold housing [See Fig. 3.1]. Insert the Quick Disconnect tube into the
EC-Gold’s Calibration Port.
8. Start gassing the sensor by opening the valve on the canister. The flow rate is preset to
0.5 Lpm (or ~1 SCFH (Standard Cubic Foot per Hour). Wait about 90 seconds.
9. Press and hold the calibration pushbutton until the Status LED glows orange
acknowledging the calibration request. Release the pushbutton.
10. Calibration is complete. If the calibration was successful, the Status LED remains
green. If there was a calibration error such as not enough change for the gas
concentration used, then the Status LED shows red for about 2-3 seconds before
reverting back to green. For unsuccessful calibrations, the original calibration values
remain unchanged. For example, if the EC-Gold calibration gas is set as 100 ppm via
the DIP switches (this is described earlier), but the actual gas used is only 20 ppm then
the calculated sensitivity will be out of allowed limits and will cause a calibration error.
The Status LED will light red for 2-3 seconds, but the new erroneous calibration values
will be discarded.
THIS COMPLETES THE CALIBRATION PROCEDURE
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Model: EC-GOLD-NEM
5.0
ECGoldNEMUm04.DOC
Rev: 0.4
PUSH TO TEST FEATURE
The Push to Test feature allows the customer to verifty if the controller is receiving a LOW, HIGH and
HIGH HIGH (Total span) alarm signals and that ventilation fans, audio alarms etc are working.
Press the Push to Test pushbutton to activate this feature. See Figure 3.0 for the pushbutton location.
When the button is pressed and released, the Status LED starts blinking green on and off every 2
seconds to indicate a test is underway. This feature forces the sensor to to Low alarm plus 1ppm.
Press Button again to force High alarm plus 1ppm. Press Button again to force HIGH HIGH alarm (Total
span plus 1 ppm). Press Button again to get out of Push to Test feature. If Push to Test feature is left ON,
it will time out after 30 minutes.
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Model: EC-GOLD-NEM
6.0
ECGoldNEMUm04.DOC
Rev: 0.4
TROUBLESHOOTING
ERROR DESCRIPTION
WHAT TO DO

Check the power to the unit. The voltage
should be 24VDC at the power connector
with the positive and negative connected
as shown on the connector label.

If the Power checks out, call Arjay
Service.

Make sure that DIP switch 7 is set to Off
(down) position.

Make sure that the EC-Gold output mode
is set to Analog mode and not to Discrete
Voltage Output mode. See SETTING
CONFIGURATION section for details.

Calibration may be required. See the
calibration section for details.

Call Arjay/Enmet Service for Help if none
of the above fix the problem.
3. In Discrete Voltage Output mode, the ISA66RLU or Gas Alert connected to the ECGold always shows Sensor Fault

Make sure that DIP switch 7 is set to the
On (up) position.

Make sure that the EC-Gold output mode
is set to Discrete Voltage Output mode
and not to Analog.
4. When pressing the Calibration pushbutton
there is no calibration acknowledge (i.e. the
Status LED does not glow orange)

Make sure the calibration pushbutton is
pressed for at least 2 seconds.

Make sure that the DIP switches 1-6 are
not all On (Up). This will cause the
Setup mode to be entered when the
pushbutton is pressed. If the Status LED
is flashing green, first press the
calibration pushbutton to exit the Setup
mode, then set switch 6 to the Off (down)
position. Then proceed with the
calibration procedure.
1. No Output and all lights off
2. 4-20mA output does not track the gas
concentration.
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Model: EC-GOLD-NEM
7.0
ECGoldNEMUm04.DOC
Rev: 0.4
CONTROLLER SETTINGS SHEET
The factory settings column below lists the typical default settings. The user may change these values at
any time either by the integral DIP switches or via the EC-Gold hand held calibrator. If changed, please
fill in the USER SETTING column for future reference.
PARAMETER
OUTPUT MODE
VOLTAGE /
CURRENT OUTPUT
CALIBRATION
TYPE
DESCRIPTION
There are 2 main output modes which may be field
selected:
Analog: the output is proportional to the gas
concentration. The output type may be further selected to
be mA type (4-20mA) or voltage type (2V-10V) – see
Voltage / Current Output setting.
Discrete Voltage Output mode: the output is compatible
with Arjay’s ISA 66RLU/Gas-Alert Alarm system.
If Analog output mode is selected, then the type of output
may be further selected to be current type (4-20mA) or
voltage (2V – 10V).
Note: if the Output type is RLU discrete voltage, then this
setting MUST be voltage type.
Field selectable for either Dual Point, or Single Point.
The Dual Point type zero’s and spans the instrument.
The Single Point type assumes the zero has been
successfully done, and only spans the instrument.
FACTORY
SETTING
As per order
As per order
Single Point
HIGH ALARM
The value in ppm at or above which a High Alarm
condition is entered.
As per order
LOW ALARM
The value in ppm at or above which a Low Alarm
condition is entered.
As per order
CALIBRATION GAS
The calibration gas value in ppm. This value is assumed
by the EC-Gold during calibration. Note: for Single Point
calibrations, this is the only gas used. For Dual Point
calibrations, the first gas is always assumed to be clean
air (0 ppm)
As per order
This value is only pertinent if Analog Output has been
selected. It is the full scale value in PPM at which
concentration the EC-Gold output is at its maximum:
20mA (current type) or 10V (voltage type).
Note: this value cannot be set via the integral DIP
switches. It can only be set via the EC-Gold hand held
calibrator or EC-Gold Central Access Panel.
Only required for network applications (where the RS485 bus is used).
The Address is used by the EC-Gold calibrator or by the
EC-Gold Central Access Panel to access each EC-Gold
transmitter on a network. Each EC-Gold on a network
must have a unique address number from 0 – 128. Note:
the maximum address value which can be set by the
integral DIP switches is 31. To set values higher than
this, use the EC-Gold hand held calibrator.
As per order
CONCENTRATION
SPAN VALUE
NETWORK
ADDRESS
- 19 -
As per order
USER
SETTING
MAINTENANCE AND CALIBRATION
Your ARJAY / ENMET gas detector is the state of the art in gas detection, but like any other
part of your ventilation system, it requires periodic maintenance and calibration.
There are various sensor technologies that may be used in your Arjay gas monitor; including
solid state MOS, Electrochemical, Infrared and Pellister Pair (Hot wire). These have a normal
operating life of 3 to 5 years under ambient conditions. You should consider a preventive
maintenance schedule whereby you test your system on a periodic basis to ensure its proper
calibration and operation.
For solid state (MOS) sensors, we recommend calibration every 3 to 4 months for a typical
garage application. For Electrochemical sensors, we recommend calibration every 6 months for
a typical garage application. Pellister Pair we recommend every 3 to 4 months and Infrared we
recommend every 6 months. For applications that are more sensitive, or where internal policies
exist, a higher frequency of calibration may be required. This is a simple procedure which will
indicate any problems with your system. A test and calibration kit may be purchased from
ARJAY ENGINEERING for this purpose. Parts are also readily available from our facility.
MAINTENANCE CONTRACT
Alternatively you may wish to consider a Maintenance Contract with ARJAY ENGINEERING
whereby one of our service technicians comes to your site and checks out the unit for proper
calibration and operation on a regularly scheduled basis. This is done on a flat per annum fee.
All parts are extra. Typical target gases are included, however, exotic or specialty gases may
have a surcharge. If you wish us to quote a Maintenance Contract fill in the section below and
return to our office.
COMPANY:
ADDRESS:
CONTACT PERSON:
PHONE:
FAX:
EMAIL:
MODEL AND SERIAL
NO. OF GAS DETECTOR:
Fax to address below or e-mail to arjay@arjayeng.com
ARJAY ENGINEERING LTD
2851 Brighton Rd
Oakville, Ontario, Canada L6H 6C9
Telephone: +1 (905)-829-2418
Telefax: +1 (905)-829-4701
N. America Toll: (800)-387-9487
Internet: www.arjayEng.com
E-Mail: arjay@arjayEng.com
ARJAY ENGINEERING LTD.
GUARANTEE
We hereby guarantee this instrument to be free from defects in workmanship
and materials, and if found defective in workmanship or materials, upon
being returned to our factory, prepaid, within one year from date of purchase,
it will be repaired or replaced at factory without charge. However, if upon
being returned and after inspection, there is evidence that the instrument has
been subjected to tampering, careless handling, improper or faulty
application or installation, the above guarantee shall not be applicable, and we
shall have the right in any such case to make a charge to cover the cost of
repairs, servicing and transportation expense. The undersigned assumes and
shall have no liability for consequential damages resulting from the use or
misuse of the instrument.
The foregoing guarantee is in lieu of all other guarantees or warranties,
expressed or implied, and all other obligations or liabilities, contractual or
otherwise, either to the original purchaser of said instrument, or to any other
person whomever.
BY: ARJAY ENGINEERING LTD.
For service, call ARJAY Engineering Ltd. directly:
Canada (905) 829-2418
North American Toll Free:
1-800-387-9487
Fax:
(905) 829-4701
Internet:
www.arjayeng.com
E-mail:
arjay@arjayeng.com
ARJAY ENGINEERING LTD
2851 Brighton Rd
Oakville, Ontario, Canada L6H 6C9
Telephone: +1 (905)-829-2418
Telefax: +1 (905)-829-4701
N. America Toll: (800)-387-9487
Internet: www.arjayEng.com
E-Mail: arjay@arjayEng.com