MAINTENANCE

Question 1

What are the MAX depth limitations for KM-97 and MK-20?

Answer 1

KM-97: 132 FSW

MK-20: 150 FSW

Question 2

what PSI does the pressure relief valve blow on console for LP SIDE?

Answer 2

400psi

Question 3

what is the pressure relief valve set to blow at on the first stage regulator on ICS?

Answer 3

180-200psi

Question 4

how long is the umbilicals?

Answer 4

330ft

Question 5

on the HP side of the console, what is the max psi on the gauge read?

Answer 5

5000psi

Question 6

what is the max strength of the umbilical?

Answer 6

800lbs

Question 7

when is the cross connection valve used for?

Answer 7

when hand loader fails.

loosing HP pressure from one bank.

Question 8

what does ICS stand for?

Answer 8

intermediate compensate system

Question 9

what is the working pressure set at on the HP whips?

Answer 9

5000 psi

Question 10

what is the hand loader set at during dive ops?

Answer 10

350-375psi

Question 11

what is the HAND LOADER regulator rated at?

Answer 11

5000psi and a max outlet pressure of 400psig.

Question 12

what’s the LP manifold pressure gauge read?

Answer 12

0-600psi (blows at 400psi)

Question 13

what is the depth of the pneumo?

Answer 13

250ft

Question 14

what is the strength member on the umbilicals?

Answer 14

comms line

Question 15

what is the EGS pressure set at- over bottom?

Answer 15

135-165psi (generally standard at 135psi)

Question 16

what is the ICS over bottom set at?

Answer 16

155- 165psi

Question 17

what is the max depth of the cosole?

Answer 17

165ft.

Question 18

what is the max LP outlet pressure?

Answer 18

400-420psi

Question 19

what is the max flow capability on HP side?

Answer 19

400 psig

Question 20

what is the reducer on the hand loader set at?

Answer 20

350 psig w/ max flow of 700psg

Question 21

what are the ADVANTAGES of console?

Answer 21

light weight and portable
rapid set up and deployment
ease of operation
HP and LP cross connect capabilities for added redundancy and safety. 
low maintenance, durable and reliable

Question 22

what’s the circumference of the umbilical?

Answer 22

1/4” and 3/8”

Question 23

DASP - DIVERS AIR SAMPLE PROGRAM

DIVERS air procured commercial source SHALL:

Answer 23

1- be certified in writing by the vendor
2- GRADE A SOURCE 1 (presurized cylinder)
3- SOURCE II - compressor

Question 24

DASP: when do you do a air sample?

Answer 24

every 6 mos w/in interval betw/ 4 to 8 mos:

• following last tested
• contamination is suspected
• after system overhaul

note: the most recent air sample analysis report shall be maintained on file for sac. air compressor.

Question 25

what size cylinders are we authorised to use?

Answer 25

1- aluminum 80's 2- steel 100's 3- steel 63's 4- pony .8cu (ics)

Question 26

WHAT IS THE PNEUMO MADE OF, SIZE, AND RATED PRESSURE?

Answer 26

BLACK NYLON PLASTIC 3/16" DIAMATER MAX INTERNAL PRESSURE OF 200PSIG PNEUMO GUAGE 0-250'.

Question 27

WHAT IS THE PURPOSE OF THE ICS?

Answer 27

ICS REDUCES THE NORMAL UMBILICAL SUPPLY OF 350PSIG TO BETWEEN 150-170PSIG OVER AMBIENT PRESSURE TO THE DEMAND MODE (HELMET/ MASK).

Question 28

DESCRIBE HOW THE AIR FLOWS THROUGH THE SYSTEM.

Answer 28

xlds system uses a specially designed 1/4" main gas umbilical assembly that reduces the weight and bulk of the umbilicals to approx. half of the surface supply. console produces supplied air of 350-375psi to a volume compensated pressure control system worn by the diver ics. ics manifold w/ .8ltr accumulator and manifold regulator system that reduces high velocity medium pressure breathing air betw/ 155-165psig to the helmet / mask.

Question 29

what (4) components make up the umbilical assembly?

Answer 29

``` breathing gas hose pneumo comms grab line (20') note: both comms and grab line has a D ring snap shackle attached to it. ```

Question 30

what is the umbilical hose rated at what psig? (2)

Answer 30

designed at 1500 psig | rated at 400psig

Question 31

what is the minimum breaking strain for the comms line?

Answer 31

2200 lbs minimum | 800lbs strength lifting capacity

Question 32

what is the purposes of the check valve and where are they located at?

Answer 32

purpose of the check valve is to not let air escape from the egs if for instance the umbilical gas hose severed or damaged. check valve is located in the manifold of the ics and km97 hat. ICS: check valve allows breathing air to flow into manifold block assembly from EGS cylinder carried on divers back. If the umbilical air supply is interrupted, the diver can open EGS valve using control knob. The breathing air is channeled from the EGS, through the manifold block assembly and into the umbilical to mask hose assembly attached to the demand regulator.

Question 33

Can we use a MK20 MOD 1 for contaminated water diving?

Answer 33

NO, because it's non positive pressure, meaning occasional water will enter mask.

Question 34

What temperature can MK20 sustain up to?

Answer 34

29 degree water and warmer

Question 35

Describe what is the KM97 helmet? (3)

Answer 35

1- 455 balance regulator stainless steel that offers for greater overall breathing performance than the non balanced super flow 350 regulator. 2- Operates in water temp as low as 34 degrees. 3- Weighs 31lbs.

Question 36

Explain how the KM97 regulator works?

Answer 36

Regulator is loaded as the diver increasing descends and unloaded as diver returns to surface. If the diver experience free flow w/ regulator, when the bias adjustment knob is properly set and regulator has been maintained correctly, the pressure setting on the HP regulator may be set too high and may need to be decreased. Quad exhaust system is recommended for contaminated diving.

Question 37

Explain how check valve works on KM97?

Answer 37

One way valve (check valve) prevents the flow of gas out of the helmet to the umbilical in the event of a sudden lowering of pressure in the umbilical. This can happen due to accidental break in the hose or fitting near surface. Not only would EGS can be lost if the one way valve failed, but the diver could suffer from a serious squeeze that could cause injury or death. One way valve must be tested daily or every diving day.