SECTION 5: SYSTEM CONTROL ELECTRONICS
YZ Systems Milton Roy • 201 Ivyland Road • Ivyland, PA • USA • 18974 • P: 281.362.6500 • www.yzsystems.com
Page 42
NJEX ZEO Version 04/13/2021
Rate. When the desired value is displayed, press the Select Key to exit the editing mode.
The value will display as standard with the default background color and dark text.
2.6. Repeat step 2.5 to set the remaining parameters: Maximum Gas Flow, and Odorant
Density, Flow (No Signal), Low Flow Shutoff, and Odorant Output. Maximum Pump
Capacity will be a read-only parameter taken from the pump calibration procedure.
2.7. Flow (No Signal), Low Flow Shutoff, and Odorant Output parameters are not enabled by
default. If they are not enabled, the N-400 controller disregards these parameters. To
enable, use the navigation arrows to navigate to the box displayed next to Enable and
press the Select Key. If the parameter is enabled, the box will be filled with a check mark.
2.8. Repeat step 2.7, if necessary, to enable additional optional parameters.
2.9. To disable these optional parameters, use the navigation arrows to select a box that is
filled with a check mark next to Enable and press the Select Key. If the parameter is
disabled, the box will be displayed empty.
3 - Calibrating Input Signals
The N-400 controller uses inputs
from various devices to properly
determine the injection rate to
the flowing pipeline. The Calibration menu
is used to manually calibrate each device to
ensure
proper
measurement.
The
measurements that are calibrated include
the Injection Pump, Flow Signal, Odorant
Tank Level, and Inlet
Pressure.
Note: The N-400 controller should be in the
stopped mode when performing the
following calibrations.
IMPORTANT: Analog Flow Input (TB8)
and Pulse Flow Input (TB2) shall not be
connected at the same time.
3.1
– Injection Pump Calibration
Calibrating the injection pump against the pipeline pressure sets the system
operational curve and reduces the time it takes to reach the injection rate target.
IMPORTANT: The pump calibration accuracy is dependent on inputting an accurate
pipeline back pressure. If the pipeline pressure varies over time due to seasonal changes
or flow changes, it is recommended to visit the ZEO system and recalibrate the injection
pump. Proper calibration allows for the most efficient system performance.
IMPORTANT: The pump calibration must be performed after the system is installed and
the priming maintenance function has been performed.
Figure 24 Calibration Menu
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