User's Manual

2
Communications
RS-485 and RS-232 (optional) serial ports are provided to support
communications with the gauge via a remote terminal, a PC with terminal
emulation software, or a TN Technologies' Hand Held Terminal.
Current Output
The gauge provides a 4-20 mA, loop-powered (24 Vdc) current output.
Setting Up and Using the Gauge
The companion manual “Accu-Wave Operation Manual” (717791) provides
detailed information on how to set up the Accu-Wave software and operate the
Accu-Wave gauge.
Hardware Installation
Licensing
All microwave frequency tuning is completed at the factory (TN Technologies
Inc., Round Rock, Texas). The Accu-Wave gauge has a Part 15 FCC license
(approval pending) for metal tank installations, so no special license is required.
For other installations, a Part 90 FCC license must be obtained and displayed at
the installation site. TN Technologies can assist you with licensing. For assistance,
call or fax one of the following numbers:
• Phone: [phone] (US only)
• Main Office: [phone]
• FAX: [phone]
Selecting a Location for the Gauge
Selecting a good location and properly mounting the gauge will help ensure the
accuracy and ease of operation of the gauge.
Follow these guidelines when selecting a location:
1. The operating temperature range for the electronics is –40
Ο
C to 70
Ο
C
(–40
Ο
F to 158
Ο
F).
2. The antenna (probe) should be mounted above the smoothest portion
of the process material surface. The antenna should be mounted with
3 degrees of vertical.
3. For best performance, there should be a clear path between the
antenna and the process material to avoid false reflections. Verify that
the path is clear of pipes, beams, or any intermittent liquid sprays that
could block the microwave beam. Try to locate the sensor to keep the
beam path (approximately 18º wide) clear of the following conditions: