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 31 of 55
Linear Positioner:
The magnetic assembly supplied with the positioner should corre-
spond to the stroke length and failure direction of the actuator. To make sure you have
the appropriate magnet assembly, check the part. The stroke length and failure direction
should be printed on the part. On the older SmartCal the magnet assembly is not printed
with this information, although there should be a serial number. Contact the factory with
the serial number to verify that it is correctly matched to the actuator. (See Figure 5-1 &
Figure 5-2).
5.1.5. Supply Pressure
The supply pressure should be regulated appropriately with regard to the actuator. If
there is question as to the proper supply pressure, the actuator manufacturer should be
contacted.
5.1.6. Positioner Pressure Rating
If the supply pressure is above 40 PSI a high pressure SmartCal positioner must be
used. If the supply pressure is below 40 PSI a low pressure SmartCal positioner must
be used.
(See Ordering Guide - Section 2.1)
5.2 FAQ’s
Listed here are some FAQ’s encountered with the SmartCal positioner.
5.2.1. The LCD remains blank even after power is applied to the positioner.
Check if loop current polarity matches positioner input.
The positioner should be given a minimum current of 3.2mA and at least 9VDC @
20mA. The voltage across the positioner can be checked by removing the cover
and connecting a voltmeter across TP1 and TP2 on the display board.
5.2.2. The positioner has power but the position as shown on the LCD does not
match the actual position of the actuator/ valve.
May need to be calibrated. Perform a manual step by step calibration or a full
automatic calibration (see sections 4.7 and 4.8).
Beacon may be incorrectly oriented.
Check if it is properly configured as linear or rotary (see section 4.8 function
“Type”
).
The flow characteristic during calibration was set to equal percentage or quick
opening, not linear. If linear is desired enter calibration and make this change (See
Calibration Instructions section 4.1 & 4.2).
.
