Product User Manual
Page 21
EPRI Commercial Microwave Fabric Dryer
Gerling Applied Engineering, Inc.
Modesto, CA
PROCESS DATA COLLECTION
The microprocessor controlling the CMFD is provided with a
dedicated serial port B which can be used to send information
processed by the microprocessor to a remote data acquisition
system. A ribbon cable terminated with a 9-pin subminiature “D”
type connector is provided at the back of the CMFD for this
purpose.
The microprocessor control software is designed to deliver the
following parameters through this serial port:
•
Exhaust Temperature
•
Exhaust Relative Humidity
•
Microwave Field Strength
A typical IBM compatible personal computer can be used to collect
the data delivered by the microprocessor. The serial port on the
computer is used to collect the data and should be setup as follows:
COM 1
19,200 baud
No parity
8 data bits
1 stop bit
No handshaking
Terminal Emulator Data Logging
Any terminal emulation program (such as HyperTerminal provided
with MS Windows 95) can be used to directly read the last values
sent by the microwave dryer CPU. The serial string received will be
a comma-delimited ASCII string currently configured to send the
last sampled temperature, humidity, and field strength values. The
typical string will be formatted as follows:
TEMP,<temp_value>,F,HUMID,<humid_value>,%,FLDSTR,<fldstr_
value>,%
The temperature value will be an integer between ambient and 250
degrees F. The humidity value will be a floating point between 0.0
and 100.0 %. The field strength value will be a running average of
the last twenty five values sampled and will be a floating point
between 0.0 and 100.0 %. If any of the fields contain {****} it
represents an over-range value.
MS Excel Spread Sheet Data Logging
An Excel spread sheet application (UWAVE.XLS) has been
developed which, in conjunction with WinWedge application
