DSP-19 User Manual
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DSP19_MAN_A
repeatedly with 50 milliseconds on followed by 50 milliseconds off for one
second, and then display its normal state.
OPEN LOOP
When the detector senses that the loop is open or the inductance is too high, the
LED will flash on once for 150 milliseconds every two seconds. This usually
indicates that there is no sensor attached or that the cable has been cut.
SHORTED LOOP
When the detector senses that a loop is shorted or the inductance is too low, the
LED will flash on twice for 150 milliseconds every two seconds.
LARGE CHANGE FAULT
When the detector senses that a loop is experiencing a large inductance change
(greater than 30%), the LED will flash on three times for 150 milliseconds every
two seconds.
PRIOR FAULT
The detector is equipped with the ability to remember prior faults that have
occurred since the last power interruption or reset (changing a DIP switch or the
sensitivity). The detector will hold this status for one week and then
automatically clear the status. The display will be on with one, two, or three blinks
off depending upon the prior failure type. See chart below for actual timing.
NORMAL
The LED is always on when the detector is in its normal state of operation.
Figure 4: Power LED States