Specifications

WESTLOCK CONTROLS CORPORATION
280 MIDLAND AVENUE, SADDLE BROOK, NJ 07663 TEL: [phone] FAX: [phone]
www.westlockcontrols.com
1/12/10 TECH-439/D.W.O. 19024 Page 31 of 58
routine. The sensor calibration also shows up under the MCAL menu. This
calibration only needs to be performed under the MCAL routine when the
positioner is set-up on a new application and only if the ACAL routine is not
performed.
Trnd The purpose of this function is to calibrate the positioner’s pressure transducer.
It should be performed only after a manual sensor calibration.
-mA- This routine calibrates the positioner’s electronics to recognizing input current.
This is done using 4.0 mA and 20.0 mA as reference points. If exactly 4.0 mA
or 20.0 mA cannot be given as inputs, the user can adjust the positioner’s
values to the input using the arrow buttons.
Xmr This routine calibrates the positioner’s optional 4-20mA position transmitter.
The transmitter calibration does not require the user to change the input
current, although it does require the user to be able to read the transmitter’s
value in mA. For each, the zero and span, the user is first prompted to enter the
value that the transmitter is presently at. This is done by using the up and down
arrow buttons. The user is then prompted to enter the desired transmitter output
(typically 4.0 mA for zero and 20.0 mA for span). The positioner then calculates
the difference between the present and the desired output currents (for zero
and span) and uses the differential to adjust the transmitter accordingly.
Flow This function allows for the setting of the flow characteristic of the positioner
(not to be confused with the flow characteristic of the valve). The options are
Lin (Linear), EP (Equal Percentage) and Opn (Quick Opening). A Lin
(Linear) positioner characteristic duplicates the inherent characteristic of the
valve and is the most often used setting.
Type This function configures the positioner for the type of valve. The options are rot
(Rotary) and lin (Linear). This setting needs to be
done in order to configure the positioner to
recognize the type of magnetic feedback being
given to the positioner. This setting is shown on the
left side of the LCD.
FLOP This function allows the user to configure the positioner to match the failure
method of the valve/actuator. The options are “off”
or “on”. The “off” option is for fail closed
applications and the “on” option is for fail open
application. When “off” is chosen the LCD will read
0% at the zero (Lo Calibration) and 100% at the
span (Hi Calibration). When “on” is chosen the LCD will read 100% at the
zero (Lo Calibration) and 0% at the span (Hi Calibration).
Westlock Controls
ICoT HART Rev 1.0.00
R %OP 50.0 %SP 50.0
12.0mA OK
Westlock Controls
ICoT HART Rev 1.0.00
R %OP 50.0 %SP 50.0
12.0mA OK