eL-720 User’s Guide
4
SENSOR
An
eL-720
sensor is designed for a long, trouble-free life. The
sensor is tested and calibrated automatically each time the unit is
powered on.
A failed or failing sensor will be indicated 3
seconds after power-on by a two-tone alarm and all LEDs
flashing.
CLEANING THE SENSOR
If moisture is suspected of contaminating the sensor, the probe
and sensor may be cleaned using this procedure.
1.
IMPORTANT:
Remove the sensor from the instrument as
directed on page 5.
2. Remove the probe tip cap and filter from the probe tip.
3. Blow compressed air into the probe tip to remove any residual
moisture from the probe.
4. Blow compressed air
*
into the inlet and outlet ports of the
sensor.
5. Place a few drops of distilled water or isopropyl alcohol into
both the inlet and outlet ports of the sensor.
6. Blow compressed air
*
into the inlet and outlet ports of the
sensor to remove any remaining liquid and thoroughly dry the
exterior of the sensor.
7. Install the sensor, and insert a new filter into probe tip. The
unit should now operate properly.
* Note: Do not exceed 50 psi pressure. Doing so may result
in the loss of the small o-rings in the inlet and outlet ports of
the sensor.
