Hach-Lange POLYMETRON 9245 User Manual - Manual (Page 31)

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Analyzer Overview
3.10 Analyzer outputs
The following tables shows the outputs (screen, analog, alarm relays and RS485) generated by
the analyzer during the various processes (measurement, grab sample, calibration and sensor
reactivation).
For the grab sample and calibration processes, see Automatic calibration cycle on page 25 ,
Manual calibration cycle on page 27 , and Grab sample measurement cycle on page 28 for a
definition of each phase referred to in the table.
The terminology used in the tables is as follows:
• Frozen - output frozen at the last concentration value measured
• Actual - output shows the actual concentration value being measured
For the RS485 output, several variables are accessible:
• Address 0 - actual concentration value being measured
• Address 2, 4, 6, 8 - concentration value for channel 1 to 4 respectively
• Address 163 shows the analyzer status:
• 1 - number of channel
• 5 - grab sample mode
• 10 - auto calibration mode
• 11 - manual calibration mode
• 13 - sensor reactivation mode
3.10.1 Sensor reactivation
3.10.2 Standard measurement process
3.10.3 Grab sample process
Action Screen 4-20 mA Alarms
RS485
Address 0 Others
Frozen Frozen Frozen Frozen Adr 163=13
Action Screen 4-20 mA Alarms
RS485
Address 0 Others
Rinsing step Frozen Frozen Frozen Frozen
Measurement Actual
Updated during
last minute of
measurement.
Updated during
last minute of
measurement.
Actual
Address 2, 4, 6, 8:
Updated at end of
the cycle
Action Screen
4-20 mA
Alarms
RS485
Conc. Other prog. Address 0 Others
Phase 1
Frozen Frozen Event
Grab Sample
N/A
Frozen
Address 163=5
Phase 2
Phase 3
Phase 4
Phase 5
Actual Actual Actual