SECTION 5: SYSTEM CONTROL ELECTRONICS
YZ Systems Milton Roy • 201 Ivyland Road • Ivyland, PA • USA • 18974 • P: 281.362.6500 • www.yzsystems.com
Page 48
NJEX ZEO Version 04/13/2021
3.4.7. Select span to calibrate the span set
point. When Span is selected, the
calibration instructions are displayed
on the screen. This adjustment is
used
to
calibrate
the
N-400
controller for 100% tank volume.
The N-400 controller is programmed
for 100% of volume to directly
correspond to 5.00 VDC (20 mA) at
the flow input terminal board TB11
terminals #2 and #3. Refer to the
3.4.7.1. To calibrate the span set point,
apply 5.00 VDC (20 mA) to
TB11
terminal
#2(+)
and
terminal #3(-).
3.4.8. After the signal has been applied,
navigate to the Apply Calibration selection and press select.
3.4.9. If calibrated reading is within the acceptable calibration range, the calibration will be
applied and the box next to Calibrated will display a check mark.
Note:
If an error message appears the voltage at the input terminal is outside of the calibration
range of 12 mA - 22 mA.
3.5
– Odorant Inlet Pressure Calibration
3.5.1.
To begin calibrating the
Inlet Pressure,
press the Select
Key from the home screen to open
the Main Menu
3.5.2. Navigate to the Calibration Menu
and press the Select Key
3.5.3. Select the Inlet Pressure Menu
Prior to performing the odorant inlet
calibration, purge the system (if required) and
relieve all pressure from the odorant inlet.
3.5.4. If the Odorant Bulk Tank is
pressurized, close V8 and the
Odorant Supply Valve V17. Close
V13 to isolate the process gas.
Open Vent Valve V5 to release
pressure.
3.5.5. After the pressure has been
relieved, navigate to the Apply Calibration selection and press select.
3.5.6. If calibrated reading is within the acceptable calibration range, the calibration will be
applied and the box next to Calibrated will display a check mark.
Figure 32 Odorant Inlet Pressure Calibration
Figure 31 Level Sensor Calibration
– Analog Sensor
Span
