24
Operation
Normal Operation
To
change
the length setting, use the RAISE/LOWER toggle switch to move the
setting up or down by continuously holding it in the up or down position. The display
will move slowly at first and then faster. Once near the desired value, simply release
the switch momentarily and then resume changing the setpoint at the slower speed.
The new active sensor length is permanently stored in memory. Check the value by
momentarily placing the toggle switch in either position from the center position.
Note
The LENGTH adjustment can only be performed in the INCH or CM units
modes. The LENGTH adjustment is inactive if the units are set for %.
3. Configure the HI SETPOINT and the LO SETPOINT
To adjust the HI and LO setpoints, place the control mode rotary switch in the HI
SETPOINT position or the LO SETPOINT position, respectively. Use the RAISE/
LOWER toggle switch to adjust the respective setpoint in the same manner as
described for the LENGTH adjustment in step 2. The setpoints may be located
anywhere between 0% to 100% of the active sensor length. The HI and LO setpoint
adjustments are compatible with all three units modes.
a. When the measured liquid level reaches or exceeds the HI setpoint, the HI
LEVEL LED on the front panel is energized and a set of relay contacts are
closed on the 9-pin D connector J2 on the rear panel (see the
Appendix
for
the pinout). When the level falls below the HI setpoint, the LED is
extinguished and the relay contacts open.
b. When the measured liquid level falls below the LO setpoint, the LO
LEVEL LED on the front panel is energized and a set of relay contacts are
closed on the 9-pin D connector J2 on the rear panel (see the
Appendix
for
the pinout). When the level reaches or exceeds the LO setpoint, the LED
is extinguished and the contacts open.
Note
The HI and LO contacts are both closed on power-off of the instrument which
is a state unique to the power-off condition.
Note
If the LENGTH is adjusted subsequent to configuring the various setpoints,
the percentage of active length will be maintained for all setpoints. For
example, if the LENGTH is set to 100 cm and the HI SETPOINT is set to 80
cm, then adjusting the LENGTH to 150 cm will result in the HI SETPOINT
being automatically scaled to 120 cm—i.e. the setting of 80% of active length
is maintained.
Summary of Contents for 186
Page 3: ...2 Introduction ...
Page 13: ...12 Installation Configuring power ...
Page 23: ...22 Calibration Approximate Calibration ...
Page 29: ...28 Operation Sensor contamination ...
Page 37: ...36 RS 232 Communication Data Logger Option Error Codes ...
Page 47: ...46 IEEE 488 Communication Option Serial Poll Status Byte ...
Page 55: ...54 Virtual Instrument Operation Running multiple GPIB devices ...
Page 65: ...64 Index ...
