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Final Assessment

You have now completed the knowledge content and activities for PMLTEST500A Calibrate and Maintain Instruments. You may undertake the final assessment if you are ready or review the material in this unit again.

To be recognised as competent in this unit you must be assessed in both the knowledge content and workplace skills. The assessment is in two parts, part one is a trouble shooting task that requires you to apply the knowledge that you have acquired in this unit and part two is a practical assessment.

Part 1. Knowledge Assessment

The results of seven runs of two identical samples on the LSC are provided below. The first run is entirely without incident and shows you the results that you would expect for all seven runs. Unfortunately there have been problems with the subsequent six runs. Look at the images of the LSC readout and the corresponding results from these runs, determine what problem has caused it and develop a Troubleshooting Sheet in a format similar to the following table. Send the completed Troubleshooting Sheet to your Tutor.

Troubleshooting Sheet

Run Number
Problem with results is:
Problem was caused by:
Why?
1
Problem-free run Problem-free run Problem-free run
2
     
3
     
4
     
5
     
6
     
7
     

 

Run Number 1
LSC readout for run number 1

Sample Position
Sample Type
CPM
Comment
1
Background Blank
17.4
Within norm
2
Cocktail Blank
39.9
Within norm
3
Quench Standard
365,998
33.03% quench
4
Sample 1

3H – 29,998
35S – 387,989

Adjusted for blank and quench
5
Sample 2
33H – 31,098
35S – 389,122
Adjusted for blank and quench

 

Run Number 2
LSC readout for run number 2

Sample Position
Sample Type
CPM
Comment
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 

Run Number 3
LSC readout for run number 3

Sample Position
Sample Type
CPM
Comment
1
Background Blank
17.4
Within norm
2
Cocktail Blank
39.9
Within norm
3
Quench Standard
365,998
33.03% quench
4
Sample 1

3H – Error
35S – 387,989

Adjusted for blank and quench
5
Sample 2
3H – Error
35S – 389,122
Adjusted for blank and quench

 

Run Number 4
LSC readout for run number 4

Sample Position
Sample Type
CPM
Comment
1
Background Blank
45.09
Caution – High Blank Backgrounds
2
Cocktail Blank
56.82
Within norm
3
Quench Standard
365,998
33.03% quench
4
Sample 1

3H – 31,112
35S – 487,989

Caution – Low Reading
5
Sample 2
3H – 25,963
35S – 189,122
Adjusted for blank and quench

 

Run Number 5
Note: the LSC panel parameters are correct.
LSC readout for run number 5

Sample Position
Sample Type
CPM
Comment
1
Background Blank
3H – 30,194
35S – 387,989

Caution – High
Blank Backgrounds

2
Cocktail Blank
39.9
Within norm
3
Quench Standard
365,998
33.03% quench
4
Sample 1

17.4

Caution – Low Reading
5
Sample 2
3H – 31,098
35S – 389,122
Adjusted for blank and quench

 

Run Number 6
Note: the LSC panel parameters are correct.
LSC readout for run number 6

Sample Position
Sample Type
CPM
Comment
1
Background Blank
17.4
Within norm
2
Cocktail Blank
39.9
Within norm
3
Quench Standard
365,998
33.03% quench
4
Sample 1

3H – 42.00
35S – 39.75

Caution – Low Reading
5
Sample 2
33H – 41.95
35S – 38.88
Caution – Low Reading

 

Run Number 7
Note: the LSC panel parameters are correct.
LSC readout for run number 7

Sample Position
Sample Type
CPM
Comment
1
Background Blank
3,999,888
Caution High Readings
2
Cocktail Blank
4,999,961
Caution High Readings
3
Quench Standard
1,365,998
Caution > 100% quench value
4
Sample 1

3H – 3,929,998
35S – 5,387,989

Caution High Readings
5
Sample 2
3H – 4,831,098
35S – 4,389,122
Caution High Readings

 

Part 2. Practical Assessment

Practical assessment requires you to demonstrate competency on-the-job (or in a simulated laboratory).

The assessment will consist of:

  • a demonstration of the competency on-the-job or in a simulated workplace.
  • oral questioning about things such as laboratory specific knowledge of processes, troubleshooting and questioning related to specific safety or other factors that may be peculiar to the learner’s work environment, and
  • any relevant workplace documents that support the assessment. You can supply these to your Tutor if you think that they support your case for competency. For instance copies of chemical inventories that you have used, SOPs developed by you etc. Alternatively, your tutor may request specific documents to aid in your assessment.

If you are ready to undertake the practical assessment, send a message to your tutor.

Use the following link to obtain a checklist to be used by your assessor.

form icon Checklist: PMLTEST500A Calibrate and Maintain Instruments

 


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