Datasheet

254 | SR1M
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Changing Output Signal
ON
Signal Reversing Switch
Status LED
Zero / Span Pushbutton
to gain access to the
controller board, remove
the four phillips screws
and remove rear cover.
zero/span pushbutton and signal selection switches
located on controller board
Internal Controller Board
Setting Span:
Set the cable to the desired SPAN point then depress and hold the
button until the STATUS LED begins to ash RED. Release the but-
ton when the LED begins to ash RED (not GREEN). The ashing will
then slow down to about two-second intervals to indicate that the
SPAN value is being set into memory. When completed, the STATUS
LED will turn o.
Setting Zero:
Set the cable to the desired ZERO point and then depress and hold
the button until the STATUS LED begins to ash GREEN. Release the
button when the LED begins to ash GREEN (not RED). The ashing
will then slow down to about two-second intervals to indicate that
the ZERO value is being set into memory. When completed, the STA-
TUS LED will turn o. Remove power for 2 seconds then reconnect.
Set Span
Set Zero
Reprogramming ZERO and SPAN:
The ZERO and SPAN points have been preset at the factory but can
easily be changed to match any desired stroke within the full stroke
limits of the sensor. To reprogram the SR1M to your own settings,
remove the rear cover to gain access to the internal controller
board. Locate the push-button on the circuit board and follow the
instructions below.
Please note that ZERO and SPAN points can be set independently. You can set one without setting the other. This operation must
be performed with the sensor under power. Important: when you are finished, disconnect power for at least 2 seconds to permanently set your
new settings.
Factory Set Span Factory Set Zero
Factory Calibrated Stroke Range
SR1M-125 = 125 inches
4 ... 20 o
20 ... 4 on
output signal
options (mA)
switch settings
zero span
o
on
The SR1M leaves the factory set with a 4...20 mA full scale output signal.
The signal can be reversed (see illustration) by simply changing a dipswitch
located on the controller board.
This may be done without resetting the “zero” and “span” points.
Remove the rear cover to gain access to the board.
Reversing the Output Signal:
green red
Status LED**
o o
on ashing
ashing on
output signal within programmed limits
output signal below zero setting
output signal beyond span setting
**Note: Flashing Status LED will cause the output signal to uctuate.