Judd Communications Depth Sensor, Analog Version
1. Obtain the raw distance measurement from the sensor. (make sure DIP Switch 3 is ON)
2. Get the external temperature measurement.
3. Calculate the Correction Factor. CF = ((Temp C. + 273)/273)^.5
4. Multiply the raw distance by the CF.
DIP Switch 4
600 milliseconds after power up the air temperature measurement will be output, and stay on the output
for at least 200 milliseconds before the output changes over to the distance measurement. Some
dataloggers and control systems do not have the ability to make millisecond resolution delays. When DIP
Switch 4 is turned on, the air temperature measurement is held on the output for an addition second for a
total of 1.2 seconds.
This enables dataloggers and control systems with at least one second delay resolution to obtain the air
temperature measurement.
Normal sensor timing sequence with DIP switch 4 OFF:
0 to 400 ms
sensor warm up
400 to 800 ms
air temp. output
600 to 2600 ms
error checking
2600 ms -
distance output
Sensor timing sequence with DIP switch 4 ON:
0 to 600 ms
sensor warm up
600 to 1800 ms
air temp. output
1800 to 3600 ms
error checking
3600 ms -
distance output
MISC.
Some control systems and dataloggers want to know minimum and maximum range values instead of scale
multipliers. These values do not denote the actual maximum range of the sensors.
Distance:
Scale
Minimum
Maximum
Inches
0
492.15
Centimeters
0
1250
Air Temperature:
Scale
Minimum
Maximum
Degrees Kelvin
0
500
WARRANTY
The Judd Communications Depth Sensor is warranted by Judd Communications to be free of defects in
material and workmanship under normal use and service for a period of one year from the date of
shipment. Judd Communications obligation under this warranty is limited to repairing or replacing
defective products. The customer shall assume all costs of removing, reinstalling, and shipping defective
products to Judd Communications. This warranty shall not apply to any Judd Communications products
which have been subjected to modification, misuse, neglect, accidents of nature, or shipping damage. This
warranty is in lieu of all other warranties, expressed or implied, including warranties of merchantability or
fitness for a particular purpose. Judd Communications is not liable for special, indirect, incidental, or
consequential damages.
Products may not be returned without prior authorization. To obtain a Return Materials Authorization,
contact Judd Communications. Phone (801)424-2889
Non-warranty products returned for repair should be accompanied by a purchase order to cover the repair.