CRANE
CO.
280
N.
MIDLAND
AVE.,
STE
258,
SADDLE
BROOK,
NJ
07663
WWW.AVIDCONTROLS.COM
12/17/12
TECH-440/D.W.O. 23135
Page 30 of 55
5 Trouble Shooting
5.1 Preliminary Checks
Before operating the positioner check the
following:
5.1.1. Voltage
The positioner requires a 4-20 mA current source,
with a minimum voltage of 9VDC at its terminals,
over-current protected up to 35VDC.
Current range: 3.2mA to 22mA, accordingly to the following table
(NAMUR NE43):
Loop Current
[mA]
Electronics
Spool
valve
HART
comm
0.0
≤
I < 3.2
OFF
OFF
OFF
3.2
≤
I < 3.5
ON
OFF
OFF
3.5
≤
I < 3.8
ON
OFF
ON
3.8
≤
I
≤
20.5
ON
ON
ON
I > 20.5
ON
ON
ON
5.1.2. Electrical Connection
Check the polarity of the 4-20 mA loop
current loop. The SmartCal terminal strip
visually designates the positive and
negative terminal points for connection
with a “+” and “-”, respectively.
5.1.3. Pneumatic Connection
Single Acting:
Output port 1 should be
piped to drive the actuator away from the
valves fail position. Output port 2 should be
plugged. (See Section 3.3)
Double Acting:
Output port 1 should be
piped to drive the actuator away from the
valves fail position. Output port 2 should be
piped to drive the actuator towards the
valves fail position. (See Section 3.3)
5.1.4. Magnetic Position Feedback
Rotary Positioner:
The magnetic beacon
should be set in the proper orientation,
based on the direction of failure. (See
Section 3.1)
