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MODE DESCRIPTION PARAMETERS
4
Response Time
Range = 1-3
Default = 1
1 = 3.3 ft/min (1m/min)
2 = 15ft/min (4.5m/min)
3 = >15 ft/min (4.5/min)
Mode 4 is used to select the desired response time of the sensor. The response time represents the
maximum rate of change in target level that the sensor will accurately display. Thus, setting 1 (3.3 ft/min) is
the slowest setting, and setting 3 ( >15 ft/min) is the fastest.
MODE DESCRIPTION PARAMETERS
5
Fail-safe
Range = 0 - 2
Default = 1
0 = hold last
1 = 22 mA
2 = 3.75 mA
Mode 5 sets the output condition that the sensor will revert to in the event of a loss of echo condition. If this
mode is set to 0, the sensor will hold the last reading until the signal is regained. If set to 1, the output of the
sensor will go to 22 mA. If set to 2, the output will go to 3.75 mA.
MODE DESCRIPTION PARAMETERS
6
Fail-safe
Units = Seconds
Delay
Range = 5-9999
Default = 15
Mode 6 sets the delay, in seconds, before the output will show a loss of echo condition set in Mode 5. When
this time has expired, the display and output will change to their fail-safe settings.
• Calibration Modes
MODE DESCRIPTION PARAMETERS
7
4 mA Trim
Range = 0-9999
Default = 5000
Mode 7 fine tunes the minimum current sourced on the analog output.
MODE DESCRIPTION PARAMETERS
8
20 mA Trim
Range = 0-9999
Default = 5000
Mode 8 fine tunes the maximum current sourced on the analog output.
MODE DESCRIPTION PARAMETERS
9
Calibration
Range = 0-1999
Default = 1000
Mode 9 is used to calibrate the sensor for variations in the speed of sound due to variations in atmospheres.
The default of 1000 is used for most applications. Assume a decimal after the first digit.
NOTE
: Most applications do not require the user to manipulate modes beyond 6.
