Sure-Aire™ Flow Monitoring System
12
®
1. Test Equipment
1.1 Digital multimeter - set multimeter to read mA
DC.
1.2
Load resistor - select a series load resistor
between 200 and 900 ohms.
2. Interconnect wiring
2.1
Validate the electronics is set up for 4-20 mA
output signal.
2.2
Validate the power is OFF on the DC power
supply and the Sure-Aire electronics.
2.3
Validate the multimeter is set to read mA DC.
2.4
Select a series Load Resistor between 200 and
900 ohms and install one end to TB3-6.
2.5
Interconnect the multimeter (+) probe to the
other end of the load resistor.
2.6
Interconnect the multimeter (-) probe to TB3-7
to complete the current loop.
2.7
Apply power to the Sure-Aire electronics.
2.8
Press the “Setup” button on the touch panel
interface.
4-20 mA Transmitter Calibration Procedure
NOTE
Apply a vacuum to the Low Port and the 4-20 mA
transmitter to track the span of the pressure range.
For example, the Sure-Aire electronics with a pressure
sensor of 0 - 41.51 in. wg installed, 4.00 mA = 0 in.
wg, 20.00 mA = 41.52 in. wg.
WARNING
Due to load resistance change from product to
product, it may be necessary to recalibrate the 4-20
mA transmitter.
2.9
Keep pressing the “Next” button until you reach
the Transmitter Min Value parameter screen.
2.10
Press “Edit”, then “Inc” or “Dec” until the digital
multimeter reads exactly 4.00 mA.
2.11
Press “Enter” to store the new value.
2.12 Press “Next”.
2.13 On the Transmitter Max Value screen, press
“Edit”, then “Inc” or “Dec” until the digital
multimeter reads exactly 20.00 mA.
2.14 Press “Enter” to store the new value.
2.15 Press “Exit” to return to the main screen.
The 4-20 mA transmitter calibration is complete.
Greenheck
Sure-Aire V 2.00
Transmitter Min Value:
1827
Exit
Prev
Next
Edit /
Enter
Greenheck
Sure-Aire V 2.00
Transmitter Max Value:
720
Exit
Prev
Next
Edit /
Enter
