Pid

Question 1

What is a PID

Answer 1

Photo-Ionisation Detector

Question 2

What does the PID detect?

Answer 2

VOC’s and toxic chemicals

Question 3

Is the PID intrinsically safe?

Answer 3

Yes

Question 4

What is the battery run time?

Answer 4

16 hours

Question 5

What kind of lamp does the PID use?

Answer 5

Ultraviolet

Question 6

What strength of lamp do we use?

Answer 6

10.6 eV

Question 7

What are the start up test’s?

Answer 7

• Pump test
• Humidity test
• Bump test

Question 8

Pump test

Answer 8

To ensure there are no leaks and the pump is running correctly

Question 9

Humidity test

Answer 9

To check the device responds to moisture

Display should read <2000ppb

Question 10

Bump test

Answer 10

To ensure the instrument is operating within specification.

Question 11

What gas is used to calibrate the PID?

Answer 11

isobutylene

Question 12

What is the battery recharge time?

Answer 12

8 hours

Question 13

What should always be fitted to the probe inlet?

Answer 13

PTFE filter

Question 14

Describe Photo-ionisation

Answer 14

• A PID uses an ultraviolet lamp to ionise molecules

• causing them to release an electron
• forms a positive ion

Question 15

To be detected the Ionisation Energy must be what?

Answer 15

Less than the lamp - 10.6 eV

Question 16

What can be detected by the PID?

Organic

Answer 16

• Aromatics e.g. Benzene
• Ketones e.g. Acetone
• Amines & Amides e.g. Diethyl
• alcohols e.g. Ethanol
• Unsaturated hydrocarbons e.g. Ethylene
• Saturated hydrocarbons e.g Octane

Question 17

What can be detected by the PID?

Inorganic

Answer 17

Ammonia, Arsine and Phosphine

Question 18

What can NOT be detected by the PID?

Answer 18

• Radiation
• Natural Gases e.g. Methane, Ethane
• Acids
• Air
• Toxics

Question 19

What must we use alongside the PID when identifying other gases?

Answer 19

Technical note 106

Correction Factors

Question 20

What can be attached to the PID to collect a sample for analysis?

Answer 20

Tedlar bag