Part 3 Operation
3.1
Understanding the Controls and their Operation
The EMD-570 Trace Oxygen Transmitter is an economical method to measure trace oxygen. The key
attributes to the unit is its easy to use interface. There is only 1 span knob to adjust which is necessary
for periodic calibration (see section 4.1 and 4.2 for more information on calibration proceedures).
All features are preset from the factory, small adjustments to the output and output range can be made
by the user. Contact the factory for more details on what settings are configurable in the field. The
Display of the analyzer is pre-configured with 5 ranges and is setup to auto-range. The ranges include
0 - 10ppm, 0 - 100ppm, 0 - 1000ppm, 0 -1% and 0 - 25%. The 4 -20mA analog output (and optional 0 -
1V DC analog output) are manually set via a short on the PCB to a selected range.
Preset from the factory the 4 - 20mA analog ouptut range is 0 - 100ppm unless otherwise specified. It
is possible to manually change the locked range in the field.
The unit is configured with a single span knob. This span knob allows for air calibration or span cali-
bration and is recommended every 2 - 3 months or as your process dictates.
