KEYENCE EX-500(W) Series - Manual (Page 8)

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3. Set the distance between the sensor head and the target to
half the maximum measuring distance. Then press the <3> key
(linearity compensation key) to check whether the output
voltage is 2.5 V.
Hold the sensor head at half the maximum
measuring distance until the LED of <3> key
goes out.
• If the analog output adjustment cannot be performed during
steps (1) through (3), for example, when any key is pressed
with the target out of the measuring range, the LED of the
corresponding key flashes and the OVER indicator lights.
By pressing the flashing key, the error is reset and the LED
goes out. Re-start the adjustment procedure given in the
previous steps.
(Note: Even if an adjustment error occurs in step (3), the
linearity compensation is performed in the controller.)
• When the response time selector switch is set to RESPONSE
1 (0.1 ms), the linearity and temperature fluctuation of the
analog output voltage is not compensated to reduce the
response time. Although the output voltage is not adjusted to
exactly 2.5 V in step (3), the compensation is completed in the
controller. When a highly accurate measurement is required,
set the response time selector switch to RESPONSE 2, 3 or 4,
then you can start the measurement without re-adjusting the
output voltage.
4. Place the sensor head in contact with the target again as
described in the step (1) to check whether the output voltage is
0 V.
If the output voltage is not 0 V, repeat the steps (1) through (3).
■ Starting measurement
Set the mode selector switch to "1" (MEAS-
UREMENT mode) to start measurement.
Precautions on analog output adjustment
• When you adjust the analog output voltage (current) using
the adjustment mode switch, be sure to complete steps (1)
through (4). If you interrupt the procedure, the linearity
compensation will not be correct.
• To be within the specifications of the EX-500(W) Series, set
the distance between the sensor head and the target exactly
as described above during the analog output adjustment.
• Making the analog output adjustment resets the auto-zero
and auto-span functions.
ADJUSTMENT
When current output is used .
the output current is set to 12 mA. Approx. 3 seconds
after pressing the key.
The LED goes out. The LED lights.
Press the
< 3 > key.
Harf F.S.(Harf max.
measuring distance)
Mode