Method 4 - Hydrogen-Oxygen Titration

Platinum

Preparation

Rate of temperature increase = 10 °C per minute
Vacuum set point = 10 µmHg

Analysis

Gas: Hydrogen
Temperature: 35 °C
Heat rate: N/A
   
Equilibration interval: 10 sec
Relative target tolerance: 5.0%
Absolute target tolerance: 5.0 mmHg
   
Repeat analysis: No
Fast evacuation: No
Unrestricted evac pressure: 30 mmHg
Evacuation time: 30 min
   
Free space: Measure
Incremental dosing: No
Line fit: Enabled for all pressure points
Pressure table (mmHg): 75, 110, 240, 170, and 200

Palladium

Preparation

Rate of temperature increase = 10 °C per minute
Vacuum set point = 10 µmHg
Task No. Action Ramp Rate
(°C / min)
Temperature
(°C)
Time
(Minutes)
1 Flow helium 10 200 10
2 Evacuate, no backfill   100 10
3 Flow hydrogen 10 400 30
4 Evacuate, no backfill   400 30
5 Evacuate, no backfill 10 35 30
6 Leak test, outgas rate
limit = 10 µmHg/min
  35
7 Evacuate, no backfill 10 35 10
8 Flow hydrogen   35 10
9 Evacuate, no backfill 10 35 10
10 * Flow Air   35 2
11 Evacuate, no backfill   35 10

* Use clean, dry air or 2%, 5%, or 10% O2 in helium or argon.

Analysis

Gas: Hydrogen
Temperature: 35 °C
Heat rate: N/A
   
Equilibration interval: 10 sec
Relative target tolerance: 5.0%
Absolute target tolerance: 5.0 mmHg
   
Repeat analysis: No
Fast evacuation: No
Unrestricted evac pressure: 30 mmHg
Evacuation time: 30 min
   
Free space: Measure
Incremental dosing: No
Line fit: Enabled for all pressure points
Pressure table (mmHg): 120, 155, 190, 225, and 260
 
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