9
Tel: 1/888/525-7300 • Fax: 1/435/753-7490 • www.apgsensors.com • [email protected]
Your
True Echo
TM
Radar Level Transmitter
is very low maintenance and will need little care as long as it was
installed correctly. However, in general, you should:
•
Avoid applications for which the sensor was not designed. Follow all temperature range restrictions,
and avoid contact with incompatible corrosive chemicals and fumes, or other damaging environments.
•
Inspect the threads whenever you remove the sensor from duty or change its location.
Chapter 3: Maintenance
• General Care
Your True Echo
TM
Pulse Radar Level Transmitter has a setting to more accurately measure target materials
with low dielectrics (ε < 4). The Low Dielectric Materials mode can be turned on or off via the Calibration
Switch on the radar.
•
Unscrew the lid of the radar.
- Blinking Green Status LED (see Terminals on Page 5) indicates Low Dielectric Materials mode is ON.
- Solid Green Status LED indicates Low Dielectric Materials mode is OFF.
•
To toggle the Low Dielectric Materials mode, press and hold the Calibration Switch button until the
Status LED cycles from Yellow to Red and then off (see Terminals on page 5).
•
Replace lid of radar when finished.
•
Low Dielectric Material Setting
All
True Echo
TM
Pulse Radar Level Transmitters can be calibrated in the field to set minimum or maximum
material levels for 4 mA or 20 mA output.
For Full/Maximum Level Calibration
•
Turn Low Dielectric Materials mode OFF (see instructions above).
•
With target material at maximum desired level, press and hold Calibration Switch button.
- For 20 mA output, release button when Status LED turns Yellow.
- For 4 mA output, release button when Status LED turns RED.
•
Status LED will flash after release to confirm setting.
For Empty/Minium Level Calibration
•
Turn Low Dielectric Materials mode OFF (see instructions above).
•
With target material at minimum desired level, press and hold Calibration Switch button.
- For 20 mA output, release button when Status LED turns Yellow.
- For 4 mA output, release button when Status LED turns RED.
•
Status LED will flash after release to confirm setting.
• Field Calibration
