13
&LUFXLW%RDUG)HDWXUHV
• Two test points are provided as a convenience for
attaching HART
®
communication master.
7KH:3ZULWHSURMHFWVKXQWHQDEOHVDQGGLVDEOHV
WKHDELOLW\WRFKDQJHFRQ¿JXUDWLRQVHWWLQJV,WFDQ
SUHYHQWXQLQWHQGHGFRQ¿JXUDWLRQFKDQJHVIURPDQ
DFFLGHQWDOSUHVVRIWKH=(52RU63$1EXWWRQDQG
from communications with a HART
®
communication
PDVWHU6HWWKLVVKXQWWR21WRSUHYHQWFRQ¿JXUDWLRQ
FKDQJHV6HWWKLVVKXQWWR2))WRDOORZFRQ¿JXUDWLRQ
changes.
• The FAULT shunt determines whether the transmitter
fails high or low in a fault condition. When set to high,
the transmitter will output 21.0 mA in a fault condition.
:KHQVHWWRORZWKHWUDQVPLWWHUZLOORXWSXWP$LQ
a fault condition. The transmitter will output 3.8 mA
and 20.5 mA when operating normally.
• The FIND shunt determines if the transmitter will
respond to a FIND command. When set to ON,
the transmitter will respond to HART
®
communication
PDVWHU¶V)LQG&RPPDQG:KHQVHWWR2))WKH
transmitter will ignore FIND commands. This is useful
for allowing a HART
®
communication master to
discover the transmitter
7KH/('ZLOOÀDVKLQUHVS$57
®
FRPPXQLFDWLRQPDVWHU¶V6TXDZN&RPPDQG7KLVLV
useful for identifying a transmitter attached to a HART
®
communication master.
&DOLEUDWLRQ
A. Place the WP shunt in the OFF position in necessary
to allow calibration to be performed.
B. Set the valve at the position where you want the
meter to read 0% (that is 4 mA). Press and hold the
=(52SXVKEXWWRQIRUWZRVHFRQG$57
®
FRPPXQLFDWLRQPDVWHUWRVHWWKH=(52SRLQW
C. Turn the valve to opposite position where meter
should read 100% (20 mA). Press and hold the SPAN
pushbutton for two seconds or use a HART
®
communication master to set the SPAN point.
D. Reposition the WP shunt if desired.
*OPTIONAL, MAYBE CONNECTED TO TEST POINT
AS SHOWN OR TO SCREW TERMINALS
**REQUIRED FOR HART
®
COMMUNICATIONS,
OPTIONAL OTHERWISE
FIND SHUNT
FAULT SHUNT
WP SHUNT
SQUAWK
LED
TEST POINT
4-20 mA METER
+
- -
+
**250Q
HART
®
COMMUNICATION
MASTER*
24 VDC
POWER
SUPPLY
6HH 3DJHV
for wiring procedure, intrinsic safety
parameters, relevant warnings and schematics.
