CRANE Co.
280N MIDLAND AVENUE, STE.258, SADDLE BROOK, NJ 07663 TEL: 201-794-7650 FAX: 201-794-0913
www.avidcontrols.com
01/05/2018
TECH-537/ D.W.O. 23142
Page 6 of 21
1.5 Special Features
Front panel
o
LCD to show alphanumeric characters (8 digit 14 segment)
o
Diagnostic / Fault - Red LED
Auto Calibration
Direct and reverse acting (set for low or high loop current closes valve)
Transmitter will output 4mA for valve closed, 20mA for valve open with current
Increasing linearly with opening percentage.
Two switch calibration for 4mA and 20mA without need to set loop currents
Low position calibration
High position calibration
Auto tuning automatically selects loop parameters for best operation
Allowed range of actuators in terms of open/close times
250ms to 2 – 10 minutes, upper limit can be adjusted via Long CAL
Manual tuning
o
Set Drop Off on/off
o
Set Gain, Zero and Span positions
o
LCD displays loop current, valve position.
Integrated Transmitter
The transmitter operates from the same sensor input as the main unit, but is powered by
a separate loop. It shows the current position of the valve by sinking between 4mA and
20mA with 4mA being 0% open and 20mA being 100% open.
If the main section of the EaziCal II fails and so ceases to provide position updates to the
Transmitter or the position sensor fails on the main section, so that the current valve
position is unknown, the Transmitter will put out a current of 3.5mA or 21.5mA
(selectable), to indicate this failure. This “fail” current will be put out within 200ms of the
actual failure. If the main unit detects an error >10% of position, the transmitter will
output fault current and the Fault LED starts blinking.
Open/close Limit Switches
These are optional SPDT Mechanical, SPDT T-Switch or NAMUR Inductive proximity
sensors.
Note : For general purpose Eazical II products ONLY, other Inductive proximity sensors
are available. See wiring diagrams 11 & 12.
