De Nora Capital Controls CHLORALERT 17CA3000 Series - Calibration (Analog Output Parameters); Mode

325.6610.17 - 56 -
4.4.2.2.4.4 Mode
This menu allows selection of the nature of the
analog output current. The possible selections are:
• 4-20 mA
• 0-20 mA
The minimum value represents the output current
that would be generated for the gas concentration
entered in the zero menu selection in section
4.4.2.2.4.3. The 20 mA output current would be
generated when the gas concentration is the value
entered in the span menu selection in section
4.4.2.2.4.2.
CH1.ANAOUT.MODE
4-10 mA
4.4.2.2.4.5 Calibration (Analog Output Parameters)
This menu allows the minimum and maximum
analog output current to be calibrated for proper
accuracy. Refer to section 5.2 for detailed
calibration information. Available selections are:
• GAIN
• OFFSET
CH1.ANO.CALIBRATION
OFFSET
OFFSET: The offset selection allows the low analog
output current to be adjusted of, for some reason,
the output current loses calibration. The existing
value is present and calibrated at the factory
and should require no adjustment unless testing
determines that an inaccuracy exists.
CH1.ANO.CALIB.OFFSET
128
The range of numerical entry for this parameter is 0
to 255. The default is 128, indicating the midrange
of the adjustment capability. Refer to section 5.2 for
calibration information.
GAIN: Similar to the OFFSET adjustment, the
GAIN selection provides control over the accuracy
of the 20 mA high analog output current. The
existing value is preset and calibrated at the factory
and should require no adjustment unless testing
determines that an inaccuracy exists.
CH1.ANO.CALIB.GAIN
1.000
The format of the entry, while still numerical, is
different from the offset entry. Numbers may be
entered as whole numbers or as decimals. Refer to
section 5.2 for calibration information.