User's Manual

7
SECTION 3 – INITIAL START-UP
3.1 “Transmitter Configuration” Menu
Figure 3-1shows the ECO-A-X XMITTER CONFIG menu used to activate channels, precisely
calibrate 4-20mA outputs and set time / date. Its menus are set at the factory and typically
not needed by the user. To access from any data display, place and hold the magnet over the
NEXT key for 5-seconds until the screen appears requesting a special key sequence (4-UP
keystrokes).
3.1.1 Single Gas Monitor Configuration
ECO-A-X’s are 2-wire 4-20mA devices and supports only one electrochemical sensor at this time.
3.1.2 Output Zero / Output Span Trims (Factory Preset, Technicians only!):
The Output Zero Trim / Output Span Trim entries are digital to analog (D2A) values that
determine the ECO-A-X’s final 4-20mA output. Their purpose is to provide precise 4mA and
20mA outputs.
3.1.3 Model Name
When power is applied to the ECO-A-X it will briefly show a 10 digit ASCII model name or
company name as it starts up. The name can be edited in the Transmitter Configuration menu by
editing the Model field.
3.2 Initial Toxic Monitor Start-Up
ECO-A-X Toxic Monitors are factory equipped with an electrochemical sensor which rarely
requires adjustments (other than routine calibrations) to provide accurate readings. After
installation checks should however be performed to ensure proper operation. In addition, alarm
levels, Measurement Name, ASCII fields and other variables may require attention by users in
order to best serve their application.
3.2.1 Initial Toxic Monitor “Span” Check
Prior to the initial Routine Sensor Calibration described below, a coarse SPAN gas reading
verification should be performed after installation. Apply an upscale gas value of at least 25% of
full scale to the sensor. For example, if 0-100ppm H2S is the measurement range, apply at least
25ppm but not more than 100ppm. The indicated value should read within 15% of full scale.
Remember that this is only a coarse check and precision calibrations are performed in Routine
Sensor Calibrations described in the following section 4.1.