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  Overview: https://assets.omega.com/pdf/test-and-measurement-equipment/temperature/sensors/rtds/PR-11.pdf

List of Travelers

NumberTitle and LinkAuthorDate Modified
ATLAS CO2-100ATLAS CO2-100 High Pressure Decay Test.docxBrian Qiu8 July 2020
ATLAS CO2-101ATLAS CO2-101 Evacuation and CO2 Filling Procedure.docxBrian Qiu3 June 2020
ATLAS CO2-102 ATLAS CO2-102 operation of the Julabo chiller .docxBrian Qiu8 July 2020
ATLAS CO2-103ATLAS CO2-103 Startup and Shut Down of the CO2 Plant 7-9.docxBrian Qiu9 July 2020
ATLAS CO2-104Brian Qiu18 Nov 2021
ATLAS CO2-105CO2 Operation harzard for CO2 Plant in B33Zhi Zheng18 Nov 2021
ATLAS CO2-106CO2 operation spreadsheetZhi Zheng18 Nov 2021
pressure system number of 1433

Pressure System Registration form


2014

Manual for VFD:  https://www.hitachi.us/supportingdocs/forbus/inverters/Support/WJ200_Instruction_NT325X.pdf

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The harzard of CO2 are summarized in the table as well as in the ATLAS CO2-105

Failurescommentsunmitigated consequencemitigation
pressurize the CO2 plant to over 1000 psigA pressure of higher than 1000 psig exceeds the rated pressure of some components of the CO2 plantLeaks and release of high-pressure gasesadd a pressure limit device at the pressure source, such as a PRV
valve of CO2 cylinder is not at fully close position after filling
Leaks and release of high-pressure CO2
when connected to a vacuum pump, the CO2 plant has not vented or the pressure gauge doesn't show zero gauge pressure
Damage to the vacuum pump can occur and personnel injure can happen if this step is not followed.Check pressure gauge and make sure it shows zero, before connected to a vacuum pump
run the gear pump when there is no liquid CO2 in the system
Running the gear pump without liquid can damage the gear pump due to overheating.Operation Training.
make sure the system pressure is at 800 psi before turning on the pump
run the chiller with a setpoint at lower than -52C for CO2 coolingCO2 has a triple point of -56.6 C and chiller will adjust the heat transfer fluid temperature around the setpoint, in this case CO2 might become dry iceCO2 might become dry ice and block the pipe, might cause damage on the gear pumpOperator training.
leakage from local support ( stave or ring ) at Room Temp with 800 psiEnergy for the stave with 800 psi at RoomT is around 3.5 J (with tube length ~200 mm) and for the ring, the energy is around 16 J, the energy is very smalsmall broken pieces flashing out might cause some personnel injurewear safety glasses