User manual

Model: EC-GOLD
ECGOLDUM17.DOC Rev: 1.7
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1.3 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 / 2-
10V, or Arjay’s RLU Discrete Voltage Output which is used in grouped or
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.
SELF TEST FEATURE On demand using the Push to Test pushbutton AND a periodic test
approx. every 18 hours.
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, H
2
S, NH3,
NO, NO2 and Cl2.
OUTPUTS
mA output When configured for Analog output: 4-20mA into 650 ohms max.
DC Voltage output When configured for Voltage output: 2-10V proportional to calibrated
range.
mA / Voltage output 0.1% resolution – non-isolated.
RLU DV output When configured for RLU Discrete Voltage Output mode:
0V = No Alarm, 1.8V = Low Alarm, 2.8V = High Alarm, 10V = Sensor
Fault. (Sensor Fault only detected with CO sensor).
Alarms 3 alarms (High, Low and Sensor Fault).
Alarm Indication 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 Nema 1 wall mount
Dimensions 7.75” [197mm]H x 3” [76mm]W x 3” [76mm]D
Weight 0.3 kg
ENVIRONMENTAL SPECIFICATIONS
Operating Temp. -20°C to +55°C
Relative Humidity 90% max. with no condensation.