Technical Specifications

587
Find Stops
On a failure of the Find Stop routine, verify the following in this order:
1. Turn on the air supply and make sure that it is at least 5 psig more than the upper spring
range value.
2. If any, adjust the reversing relay in accordance to the manufacturer’s specifications of
the reversing relay.
3. Secure all linkages connecting the travel sensor to the actuator motion.
4. Using the Status tab, verify that the alarm position sensor error isn’t enabled. In the case
that it is enabled, re-adjust the lever per the SVI’s instruction manual to insure that the
lever arm is rotating in the appropriate quadrant.
5. Verify that the minimum travel span is 4900 counts and that the sensor counts is less
than 32000 counts and more than 1 (see procedure below).
Procedure for verifying the sensor counts using Valvue2:
1. Change the mode of the SVI to Calibrate.
2. Click on the Calibrate tab.
3. Right-click in the tab or click on the Tools menu, and select Full Close.
4. Select the Check tab and note the value of RawPosition.
5. Right-click in the tab or click on the Tools menu, and select Full Open.
6. Select the Check tab and note the value of RawPosition.
Figure 11 Find Stops Lever Orientation
Maximum lever arm swing for Standard SVI version (short stroke Version is +/- 30 deg from
mid-point)