Azbil 100 Series, Руководство пользователя

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3-2
3-1-1. Auto-setup using the travel switch
Observation of the SVP is necessary when performing Auto-setup and Zero-span adjustment.
If the SVP was not ordered with the valve or actuator specified and the SVP is being used on
a push down to open acting valve, then you must first set the valve action in the SVP before
performing Auto-setup. Refer to “4.4 Device Configuration and Adjustment” on page 4-8.
The travel switch is two position switches used for triggering Auto-setup and doing manual
zero-span calibration.
Step Procedure
1 Set the input signal to the SVP to 18 ±1 mA DC
2
Open the front cover of SVP, and push travel switch “UP” (“DOWN” for
FloWing Rotary VFR valve).
3
Hold this position until the valve starts to move (approximately 3 seconds).
This starts the auto-setup routine. Release the travel switch.
4
The valve moves from fully shut to fully open twice. The valve then opens to
about 50% and stays this way for up to three minutes.
5
Confirm that the auto-setup routine is complete by varying the input signals.
The entire auto-setup procedure should take about three minutes.
Note) While executing the auto setup program, do not set the input signal below 4 mA. (As long
as the signal is in the range of 4-20 mA, changing the input signal during auto setup will
not affect the program.)
If the input signal drops below 4 mA while auto-setup is running, then autosetup will fail
and must be restarted. After completing auto-setup, keep at least 4 mA of signal (power)
for at least thirty seconds to make sure data and parameters are stored in SVP memory.
After the operation has completed, check valve operation by varying the input signal and
verifying that the valve goes to the correct position corresponding to the signal. If the span
position has shifted, perform a span adjustment operation.
In some cases, the auto-setup routine will not properly detect your valve, especially if
the valve's actuator is smaller than Azbil Corporation's HA1 type actuator (diaphragm
capacity of (850 cm
3
{52 inches
3
})) or the operation stroke is smaller than 14.3 mm
{9/16 inch}. Please contact an Azbil Corp. representative for assistance.