Obsidean_VM/01-Documentation/Endress+Houser/CO2/Promass 500 Documentation for CO2 System.md

General Information

This document details the differences between the factory configuration of the Endress+Hauser Promass 500DP and the specific configuration implemented for the CO2 system in the mixer.

Device Information

Parameter	Factory Configuration	CO2 System Configuration
Device tag	Promass300/500DP	Promass300/500DP
Serial number	X10F9F02000	X10F9F02000
Firmware version	V1.00.02	V1.00.02
Nominal diameter	DN15 / 1/2"	DN15 / 1/2"

Key Configuration Differences

1. Measurement Units

Parameter	Factory Values	CO2 System Values	Impact
Mass flow unit	kg/h	g/min	Higher precision for real-time process control
Mass unit	kg	g	Consistent with flow units
Density unit	kg/l	g/ml	Consistent with mass units
Medium selection	Liquid	Gas (Carbon dioxide CO2)	Correctly configured for CO2 measurement

2. Communication and Fieldbus

Parameter	Factory Values	CO2 System Values	Impact
Device address	126	22	Specific address in PROFIBUS network
Status PROFIBUS Master Config	Not active	Active	Confirmation of active communication with PLC
Bus termination	Off	On	Proper network termination for signal integrity

3. Analog Output Configuration

Parameter	Factory Values	CO2 System Values	Impact
0/4 mA value (Output 1)	0.000 kg/h	0.000 g/min	Adjusted to system units
20 mA value (Output 1)	1300.000 kg/h	250000.0 g/min	Range adjusted for CO2 dosing process
100% bargraph value 1	1300.000 kg/h	250000.0 g/min	Display range consistent with operational range

4. Low Flow Cut Off

Parameter	Factory Values	CO2 System Values	Impact
On value low flow cutoff	26.0000 kg/h	4333.333 g/min	Adjusted to eliminate noise readings when idle (26 kg/h ≈ 433 g/min)
Off value low flow cutoff	50%	50%	No change

5. Partially Filled Pipe Detection

Parameter	Factory Values	CO2 System Values	Impact
Assign process variable	Density	Off	Disabled as not applicable for gas measurement

6. Analog Input Configuration

Parameter	Factory Values	CO2 System Values	Impact
Analog input 3 Channel	Corrected volume flow	Density	Modified for density monitoring

7. Calibration and Adjustments

Parameter	Factory Values	CO2 System Values	Impact
Calibration factor	1.8568	1.8568	No change
Zero point	23	23	No change
Calibration date/time	16.01.25 05:52	16.01.25 05:52	Same calibration

Performance Parameters

The device is configured with all the necessary performance parameters for CO2 measurement, with measurement status indicators showing "Good" for all active channels, indicating reliable operation.

Recommendations

1. Monitor flow range: Verify that the configured range of 0-250000.0 g/min is appropriate for all operating conditions of the CO2 system.

2. System integration verification: Confirm that the PROFIBUS address (22) is correctly recognized by the control system.

3. Density measurement validation: Although CO2 density is relatively low, confirm that the density measurements are accurate for process control.

4. Document future calibrations: Maintain records of any additional adjustments made to the instrument.

Conclusions

The Promass 500DP configuration for the CO2 system has been specifically adapted to:

1. Work with more appropriate units for gas measurement (g/min instead of kg/h)
2. Establish measurement ranges appropriate for CO2 dosing (250000 g/min)
3. Configure the device specifically for carbon dioxide gas measurement
4. Set up PROFIBUS communication with the appropriate address for the system
5. Disable density-based partially filled pipe detection, which is not applicable for gas measurement

These changes optimize the flowmeter's performance for its specific application in the CO2 dosing process.