Cla-Val 131VC Series - Manual (Page 2)

How it Works
131-01 Valve
Transmitter
Dead
Band
Set-Point Command
131-01 Valve Transmitter
Transmitter
Feedback
Signal
Deviation
Transmitter
131-01 Valve
Devitation Transmitte
Feedback
Signal
1. Set-Point Command
Set-point command is received from a
remote location or entered via the key
pad into the Electronic Valve Controller.
2. Feedback and Comparison
The Electronic Valve Controller compares
the feedback signal from the transmitter
to the set-point. If the deviation exceeds
the deadband, the valve control system is
activated.
Display
The 131VC-1 has been engineered to be the industry’s most
user friendly controller. With three digital displays areas (two
offering up to 9 characters of true alphanumeric), the 131VC-1
effectively eliminates cryptic messages, sub-routines and loops
that could confuse even the most experienced operator. The
bright, crisp display is vacuum fluorescent, and offers much
better readability than any other display technology. Additional
operator-friendly features include: custom programmable
alarm messages, illuminated keys, and an easy-to-use menu
system.
Status Indicators - Four status indicators show the controller’s
operating status at all times:
Manual Key Light: For manual control.
Set-point Key Light: For indication of remote control.
Output Indicator : “OUT” and indicator lights illuminate
when either output 1 or 2 are on.
Alarm Indicator : “ALM” and indicator lights illuminate
when either output 1 or 2 are on.
Keys Pads: All menu entry, configuration, tuning and set-point
controls is entered through rugged backlit rubber keys. A simple
menu system prompts the operator, step by step, through all
procedures. Security system prevents unauthorized changes to
all values.
3. Valve Actuation
The Electronic Valve Controller actu-
ates the solenoid controls, causing the
valve to modulate as needed to regain
the set-point condition.
Keypad & Display