3
METER MODE
The DS60A Controller provides a feature for monitoring the sensitivity to the target
materials. To invoke “meter” mode, press and hold the pushbutton switch for three or
more seconds. When the switch is released, the multi-function indicator begins flashing
at a rate proportional to the strength of the sensor signal. For minimum or no signal, the
flash rate is approximately 1 Hz. For maximum signal, the flash rate is approximately
25 Hz. The color of the indicator is green if the signal is below the current calibration
threshold and red if above the threshold.
Press and release the pushbutton to exit meter mode. The indicator reverts to following
the outputs.
The gauging function of the controller remains active during meter mode. As the sensor
signal moves above and below the calibration threshold, the outputs switch accordingly
as indicated by the color of the indicator.
MULTI-FUNCTION INDICATOR INTERPRETATION
The multi-function indicator provides information about the state of the controller.
During normal gauging, the state of the indicator follows the outputs directly. When the
outputs are ON (sourcing output high, sinking output low), the indicator is red, and when
the outputs are OFF, the indicator is green.
In meter mode, the indicator flashes at a rate proportional to the strength of the signal
from the attached sensor. For minimum or no signal, the flash rate is approximately 1
Hz. For maximum signal, the flash rate is approximately 25 Hz. The color of the
indicator is green if the signal is below the current calibration threshold and red if above
the threshold.
During one-sample calibration, the indicator turns off momentarily, and then if calibration
is successful, the indicator flashes amber 4 times in succession at a 5 Hz rate then
reverts to following the state of the outputs. If calibration is not successful (the sensor
signal is too weak), the indicator flashes red at a 10 Hz rate for 15 seconds or until the
pushbutton is pressed again. If 15 seconds elapse with no repress, the indicator reverts
to tracking the outputs.
When two-sample calibration is invoked, the indicator begins flashing amber indefinitely
at a 2.5 Hz rate until the pushbutton is pressed for recording of the second calibration
point. After the pushbutton is pressed for recording the second point, the indicator
flashes amber 4 times in succession at a 5 Hz rate then reverts to following the state of
the outputs.
