User manual

Model: 2100 &2300 Series
2100UM22.DOC Rev: 2.2
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above the High Setpoint.
No action is taken when the process level is between the
High and Low Setpoints.
In the alarm condition, the corresponding alarm LED is turned
ON, and the relay is energized.
Low Yes Alarm condition set and reset as above.
In the alarm condition, the corresponding alarm LED is turned
ON, but the relay is de-energized.
 The Relay Settings menu is now displayed from which other relays may be selected to be set
up. Set the remaining relays 2 – 4 in the same way.
Note: For models 2xx0 and 2xx2 which have 0 and 2 relays respectively, the front panel LED's
are still present for visual indication of alarms even though the corresponding relays are not
installed.
3.4.7 CALIBRATION
If this is a new installation and a calibration has not been successfully done before, then the most
convenient form of calibration is the Auto Cal feature. This requires that the level in the vessel be
changed by at least 10% and the actual two levels in % be entered in the controller. The actual
levels in the vessel must be measured or determined independently and as accurately as
possible. NOTE: the more the level is changed between the 2 calibration points the better. For
example a 1% error in the entered level values for a 25% change translates to a 4% error at Full
Scale.
 Press the CALIBRATION key
*** CALIBRATION ****
1-Auto 2-Manual
3-Slope/Off 4-FS val
 Press 1 for Auto Cal.
 ACCURATELY MEASURE THE PERCENT LEVEL in the vessel (2 decimal places) and
enter it here followed by the Enter key. The tank capacitance (raw signal) is displayed on the
bottom line of the LCD. This is for observation only and may be used to confirm that the
level in the tank is stable.
 The unit now prompts for the 2nd level. RAISE OR LOWER THE LEVEL BY AT LEAST
10%. Less than 10% is allowed but may reduce accuracy. ACCURATELY MEASURE THE
NEW LEVEL IN PERCENT and enter it (again 2 decimal places) followed by the Enter key.
Again, the tank capacitance is displayed on the bottom line of the LCD.
 If the calibration was not successful, an error message is flashed on the screen for 2
seconds. Common problems are either the level in the tank was not changed or that the 2nd
level value in % was entered identical to the 1st.
 At the end of a calibration, the unit calculates 2 parameters, which it uses to determine level:
SLOPE and OFFSET. The Slope is the amount of capacitance change per percent level
change (sensitivity) and the Offset is the capacitance of the empty tank. These values may
be displayed by pressing 4 for Man. 2 option from the CALIBRATION menu. RECORD these
values for later reference in Section 6 of this manual. These values may be re-entered
instead of recalibrating the vessel using Auto Cal.
For more calibration details, see Section 4.2.