Watlow Series F4S/D - Manual (Page 52)

5 . 4
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S e t u p Wa t l o w S e r i e s F 4 S / D
Retransmit Output 1
To track the temperature of the
equipment inside the chamber,
Andy configured a retransmit out-
put to match input 3. He scrolled
down the list of inputs and outputs
on the Setup Page and found Re-
transmit Output. He chose 50ºF
and 150ºF, respectively, for the
Scale Low and Scale High; the
smaller the range, the higher the
resolution on the chart.
Source: Input 3
Current: 4-20mA
Scale Low: 50°F
Scale High: 150°F
Scale Offset: 0°F
Control Output x
(1A, 1B, 2A, 2B)
Next, he scrolled back up to
set the control outputs con-
trolling heat and humidity.
For the fastest possible
switching rate, tighter control
and longer heater life, he se-
lected Burst Fire control for
each of them, designating 1A
and 1B as heat/cool outputs,
and 2A and 2B as
humidify/de-humidify outputs.
Sample Application:
Setup for Environmental Testing
F 4
1 2
i
1B 1B 2A 2A 2B 2B
1A 1A
Main Page___________
Go to Profiles Go to Setup
Go to Factory
Analog Input 1
For greatest accuracy in measuring the chamber temperature, a re-
sistance temperature detection (RTD) sensor has been wired to ana-
log input 1. Andy wanted to measure tenths of degrees Fahrenheit,
with an alarm that would clear by itself if the temperature exceed-
ed or fell below the active alarm set point band. Alarm set points
are determined in the Operations Page.
Sensor: RTD Set Point High: 450.0°F
Type: DIN No Calibration Offset
Decimal Point: 0.0 0-second Filter
Set Point Low: 32.0°F Self-Clearing Error
Digital Output 7
Digital output 7 was wired to an SSR (solid-state relay) that switch-
ed a solenoid valve controlling the flow of liquid nitrogen used for
cooling.
Name: Default
Function: Boost cool
Boost Power Level: -90%
Boost Delay: 20 seconds
Before programming the profile
to run the temperature and hu-
midity tests in the environmen-
tal chamber, Andy had to con-
figure the controller to suit the
equipment and the test.
He went to the Setup Page,
System Menu, and established
the global system parameters,
including the real-time clock,
the date and the PID units.
Then he continued through the
list of inputs and outputs, con-
figuring each and keeping
notes about his settings on the
User Setup Chart.
To enter, press the Right
Key.
. .
To exit, press the Left Key
repeatedly.
, ,
Use a copy of the chart at
the end of this chapter to
record your settings.