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3.4.2.3 Using SVI3 DTM with Valvue3 to Check Magnet Position
1. Refer to DTM Manual for connection procedure.
2. Read Raw Position data. When the valve is closed, the value should be 60° rotation
for rotary valve.
3.4.3 Special Cases
3.4.3.1 Rotary - 90 to 120°
For actuators with 90 to 120° rotation, follow the instructions in “Mounting the SVI3 on
Reciprocating Valves” on page 30 except mount the magnet at ± 45° while the actuator is
de-energized as shown in Figure 9 on page 27
3.4.4 Mounting the SVI3 on Reciprocating Valves
This section describes the procedure for mounting the SVI3 on reciprocating valves
(using Masoneilan's 87/88 Multi-Spring actuators as an example).
Verify that the mounting has not been damaged in shipment for a pre-mounted SVI3,
physically inspect the actuator, linkage. Record the following information for the
configuration checkout:
• Valve Air to Open (ATO) or Air to Close (ATC)
• Actuator pressure rating
• Actuator bench range
• Inherent trim characteristic of the control valve; linear, equal percentage, or other.
Tools required:
3.4.4.1 Mounting the SVI3 on a Reciprocating Actuator
The SVI3 mounting assumes that the actuator is in the normal upright position.
WARNING
Do not remove the instrument cover or connect to an electrical
circuit in a Hazardous Area unless power is disconnected.
NOTE : Refer to the valve data sheet or model number of control valve.
• 7/16" Combination Wrench (2
required)
• 3/8" Combination Wrench
• 1/2" Combination Wrench
• Phillips Head Screw Driver
• 4mm, 5mm and 6mm Hex Key
Wrenches
