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5.1.3.3 Span Calibration Procedure
NOTE
Level alarms are not disabled if a span-only calibration
is performed. Span calibration must only be performed together
with a zero calibration, otherwise level alarms may be activated
(refer to section 5.1.3)
•
Once the ZERO CALIBRATION has successfully completed, a SPAN calibration
may be performed.
•
Successful completion of the ZERO CALIBRATION is indicated by two quick
flashes of the sensor LED every 2 seconds. To begin SPAN CALIBRATION,
follow the procedure below.
•
Expose the sensor to the
SPAN
calibration gas concentration (refer to section
5.1.2) and immediately begin the CALIBRATION process by placing the
“magnetic wand” over the area indicated on the sensor’s data label. Figure 5-1
shows a sample sensor data label and the correct magnetic wand oriented for
proper
CALIBRATION activation. Maintain the flow of calibration gas until SPAN
CALIBRATION is completed. This may take up to 5 minutes.
•
If the magnet has activated the sensor CALIBRATION properly, the LED stops
flashing and remains continuously lit indicating that the CALIBRATION process
has begun. The receiver’s LCD display reads “IN SPAN” during
SPAN
calibration.
•
Once the unit has completed the CALIBRATION cycle (this may take as long as
five minutes), the LED will signal whether the sensor has passed or failed CALI-
BRATION:
PASSED
- LED indicates 2 quick flashes every 2 seconds.
FAILED
- LED will flash once every 2 seconds. The sensor did not meet the
“pass calibration” criteria. A second attempt at calibration can only be made by
re-entering the calibration mode from the RUN CALIBRATION menu.
If the calibration(s) performed has passed, the unit will automatically terminate
the CALIBRATION sequence, save the new calibration data and resume normal
operation in the RUN mode.
An unsuccessful CALIBRATION will cause the unit to revert to the previous
CALIBRATION factors and a failed CALIBRATION entry will be made in the
CALIBRATION record queue
5.2 Analog Output Calibration
If the instrument contains the optional analog output PCB assembly, the accuracy of the analog out
put (AO) is controlled by the AO
GAIN
and
OFFSET
values in the corresponding menu parameters.
The AO gain and offset values are stored in the database in nonvolatile RAM. This insures that the
values are not lost in the event of a power failure.
The AO is calibrated at the factory and should require no additional calibration. If, for some unfore
seen reason, the calibration is lost or the operator desires to check the calibration, the
SETUP-CON-
FIGURE-CHANNELS-ANALOG OUTPUT-CALIBRATION
menu parameter provides this capability.
Refer to section 4.4.2.2.4 for more information.
NOTE
Performing the analog output calibration will temporarily
interrupt alarms and collection of run-mode data.
Summary of Contents for Capital Controls CHLORALERT 17CA3000 Series
Page 14: ...325 6610 17 14 Figure 2 1 Receiver Outline Dimensions ...
Page 15: ... 15 325 6610 17 Figure 2 2 Sensor Transmitter Outline Dimensions ...
Page 16: ...325 6610 17 16 Figure 2 3 Interconnection Diagram ...
Page 18: ...325 6610 17 18 Figure 2 4 Sensor Wiring ...
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