User's Manual

2
SECTION 2 – INSTALLATION INSTRUCTIONS
2.1 Introduction
Important: This manual describes the 2-Wire 4-20mA versions of the ECO-A-X. The unit is a
fixed-point monitor designed to provide continuous monitoring of hazardous gases in the
workplace. Monitored values are displayed in their engineering units as well as graphically as a
bar graphs or 30-minute trends (Figure 2.1). Input is for the electrochemical toxic sensor which is
supplied by the factory. The ECO-A-X advanced microcontroller electronics and superior graphic
LCD operator interface offers enhanced diagnostics and fault analysis not possible in competing
products. The unit provides a standard 4-20 mA output signal for connection to control systems
or other alarm instrumentation. Non-volatile memory retains all configuration data during power
interruptions. Magnetic, non-intrusive calibration can be easily performed by one person without
opening the enclosure. A standard “real time clock & calendar” feature allows data logging of
calibrations and alarm events for recall to the LCD readout.
Only periodic calibration checks are needed to assure dependable performance. Operator
interface is very intuitive with the LCD displaying data both graphically as bar-graphs / trends and
in engineering units (Figure 2-1). Additional features include:
• No potentiometer or jumper settings required. All setup is with menus accessed via the LCD
/ magnetic keypad operator interface without opening the enclosure.
• Field adjustable alarm levels may be high, low, fault, fail-safe, latching and acknowledgeable.
• New alarms cause front LED’s to flash and become steady after acknowledge.
• CAL MODE advises when to apply gas during calibrations
• One half hour trend screen shows rate of change of gas exposures
• Sensor life bar-graph updates after each SPAN calibration.
• Modular design affords efficient installation and plug in sensors allow changing target gases
after installation
• New smart sensors are recognized by the ECO-A-X and prompts users to either upload new
configuration data or continue with data from the previous smart sensor.
• Sensors are industry proven for fast response and long life.
2.2 Ratings and Certifications
ATEX certified for hazardous locations. ATEX certificate # DNV 09 ATEX 60195X. Refer to
Appendix C for information on specification and certification.
Special Conditions of Safe Use (X):
Enclosure volume shall not be increased by the addition of the Ex d sensor.