Establish Utility Gas Flows; Enable Power To The Maxum Ii; Leak Check The Column Oven Connections - Siemens Maxum Edition II Installation Manual

Initial Startup Procedures

4.5 Leak Check the Column Oven Connections

4.3

Establish Utility Gas Flows

1. Unblock the instrument air supply. If oven air regulators on the air bath oven are set to their
setpoints, adjust them to 0 psig to turn off the oven heaters. For airless ovens and modular
ovens, the heaters must be disabled using the temperature program in the Maintenance
Panel.
2. Set valve gas, if used, to the pressure specified in the Maxum II factory documentation. If
valve gas is not air, first open the valves on the cylinder providing the gas. Note: the Maxum
II has a shutdown program based on valve gas pressure. A pressure switch is set at a
decreasing setpoint of 700 kPa (100 psig.) If supply line pressure drops below this setpoint,
analyzer mode is set to hold, and all EPCs and heaters are disabled. EPCs and heaters
must then be manually enabled through the front panel touch screen display HMI before
restarting the analyzer.
3. Unblock the carrier gas and set the cylinder regulators at least 175 kPa (25 psig) above the
factory carrier gas setpoints (refer to custom documentation).
4. If used, unblock the flame detector fuel and air supplies and set the cylinder regulators at
least 175 kPa (25 psig) above the factory setpoints (refer to custom documentation).
4.4

Enable Power to the Maxum II

1. Turn on power to the Maxum II. Wait for the system to boot up.
2. On the front panel HMI, the system boots up to the Monitor menu. Select the Maintenance
menu by tapping Maintain on the right side of the touch screen.
3. In the Maintenance menu, tap
Controller to display the EPCs.
4.5 Leak Check the Column Oven Connections
1. Cap all oven vents to prevent loss of pressure. Leak check caps with a foaming liquid leak
detector to verify they are secure.
2. Confirm that the EPCs are enabled and that the pressure indicated matches the setpoint.
3. Switch the valves for a few minutes to allow pressure to stabilize and then switch them back.
Repeat until pressure is stabilized throughout the system.
4. Verify pressure is stabilized and then turn off utility gas.
5. Monitor the pressure at the EPCs for several minutes. Switch valves for a few minutes at a
time. Verify that pressure is not lost. Loss of pressure indicates a leak in the system.
6. If a leak is found in an air bath or airless oven, use a foaming liquid leak detector and leak
test the fittings in the oven. Do not use a foaming liquid detector on connections made with
fused silica capillary columns; instead, use isopropyl alcohol. Clean up any excess leak
check fluid.
7. If a leak is found in a modular oven, use a separate test fixture (part number
A5E03959533001) to leak-check the module.
8. Tighten any leaking fitting with the appropriate wrench until no leaks are detected.
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8:App I/O Temperature & Pressure and then 6:Pressure
Installation Manual
Installation Manual, 12/2019, 2000595 Rev 1