Multirae Pro

Question 1

What 5 gases does the MultiRAE pro detect

Answer 1

LEL, Oxygen, H2S, CO, Volatile organic compounds (VOCs)

Question 2

High-Low alarm levels for LEL

Answer 2

10%-20%

Question 3

High-Low alarm levels for O2

Answer 3

19.5-23.5

Question 4

High-Low alarm levels H2S

Answer 4

10ppm-15ppm

Question 5

High-Low alarm levels for CO

Answer 5

35ppm-100ppm

Question 6

High-Low alarm levels for VOCs

Answer 6

50ppm-100ppm

Question 7

What contaminants may give false readings, damage sensors, or damage meter?

Answer 7

Organic silicones, silicates, Lead containing compounds

Question 8

What are VOCs

Answer 8

Modern industrial compounds such as fuel, coatings, solvents,etc. high FP, volatile, evaporate easily.

Question 9

What is the highest IP the MultiRAE can detect?

Answer 9

10.6eV is the highest IP it can detect

Question 10

How does the MultiRAE read VOCs?

Answer 10

3 diff PID sensors, one reads PPM from 0.1-5000 ppm; the other from 1-1000 ppm and the 3rd reads in PPB from 10-2000 ppb

Question 11

What do you want to do with the meter just prior to metering the HAZ area?

Answer 11

A. Block pump inlet to make sure it’s working. Press rest.

B. Bump test. (If fails, recalibrate meter)

C. Confirm measurement gas (conversion factor) is set appropriately.

Question 12

What are “conversion factors”?

Answer 12

Values that must be multiplied by the reading, in LEL or VOCs, to get the true reading of a known chemical.

Question 13

Describe the MultiRAE probe and how long it takes for gas to reach the meter

Answer 13

Filter on the inlet tube of the meter it self, made out of plastic, intrinsically safe.

If using wand or tubing, takes about 1 sec/ft of tubing and wand for gas to reach meter.

Question 14

How do you bump test the meter? How often?

Answer 14

After meter has finished its warmup screen and is in the Home Screen, press and hold the Y/+ and N/- keys at the same time. The multi sensor bump screen will appear, apply 4 gas and press start. When finished it’ll say pass or fail. The next screen will be to bump the PID sensor. Apply the gas, press start. When finished the meter will go back to the home page.

Or

Press the O and N/- buttons at the same time. Select the bottle, select “multi sensor bump” and follow prompts.

The meter should be preformed once a week and before/after every call

Question 15

What do you do if the meter does not pass?

Answer 15

Meter must be calibrated, if it still fails, green tag and send in for repairs.

Question 16

What gas do we calibrate LEL, O2, CO, and H2S on?

Answer 16

Multi gas- methane, O2, CO, H2S

Question 17

What gas do we calibrate VOCs on?

Answer 17

Isobutylene

Question 18

Steps to manually calibrate meter

Answer 18

1.meter must be in fresh air.
2.Home Screen press O and N/- same time
3.select calibration bottle
4.select multi sensor span
5.attach 4 gas and select start
6.see pass or fail, PID calibration starts
7.apply isobutylene, press start
8.PID done, back button to home page

Question 19

How to turn off meter

Answer 19

Press and hold O button for 5 sec

Question 20

How do you change the conversion factor for LEL and VOCs?

Answer 20

Hold O and N/- at same time
Go to 999ppm icon
Select change meas gas
Pick LEL or VOCs
Select gas library
Select gas you want to use
Back to Home Screen

The LEL and VOC will flash once every 5 sec to show what conversion factor you’re in.

Question 21

What type of battery is in the meter?

Answer 21

Lithium ion rechargeable batteries. Should be on charger when not in use.

Spare alk batt comes with meter in case lithium ion battery goes dead

Question 22

When using instrument to meter for combustible liquids w/ flash points above 100°F what area of the meter should be watched (read)?

Answer 22

VOCs. High carbon molecule products (greater than 9) may give erroneous low readings in the LEL area.

Question 23

Proper metering techniques

Answer 23

Moving slowly allowing meter to read
Meter high and low
Know the MW of the product

Question 24

How do you get the backlight to illuminate?

Answer 24

Press any button