SF2 Rebreather Checklist

• Document No.

• Diver

  Sign

• Conducted on

  Date

• Prepared by

• Location
  Address

• Buddy if any…

00. Dive Details

• Dive number

01. Bail out Valve and LOOP

• BOV function - OC/CC - correct?

  Yes

  No

  N/A

• Flow - right to left / flapper valves working

  Yes

  No

  N/A

• Connected to loop hoses

  Yes

  No

  N/A

02. HEAD Visual Inspection & Lubrication

• Visually inspect all components for signs of wear and damage

  Safe

  At Risk

  N/A

• Lubricate required o-rings and sealing surfaces

  Yes

  No

  N/A

• Sensors dry and connected

  Yes

  No

  N/A

• Place head plate with o-ring and secure screwed down

  Safe

  At Risk

  N/A

03. Scrubber components

• Is the scrubber dry

  Yes

  No

  N/A

• How many hours has the scrubber been used for

• Install scrubber and ensure all spacers and o-rings are in place

  Yes

  No

  N/A

04. Mid-section

• Clean and dust free

  Yes

  No

  N/A

• O-ring lubed and correct in place

  Yes

  No

  N/A

• ADV Function OK

  Yes

  No

  N/A

05. Counter lung

• Dry and clean

  Yes

  No

  N/A

• OPV function and set to dive

  Yes

  No

  N/A

06. RB assembly

• Counter lung and Scrubber in place with mid-section. Head aligned. Clips closed.OPV set to dive. O2 + DIL hoses connected.

  Yes

  No

  N/A

07. Cylinders & Gases

• Check all cylinders are correctly labelled

  Yes

  No

  N/A

• Slowly turn on O2 and Dil mix

  Pass

  Fail

  N/A

• Analyse onboard DIL mix % (21/00)

• Analyse onboard O2 % (100)

• mV DIL - sensor; 1 - 2 - 3

• Calibrate with cap and 100% O2

  Pass

  Fail

  N/A

• mV O2 - sensor; 1 - 2 - 3

• Check cylinder mount - locked and ensure they are in the correct positions

  Yes

  No

  N/A

• Check manuel add - both DIL and O2

  Pass

  Fail

  N/A

• Inspect all hoses

  Pass

  Fail

  N/A

08. Connect LOOP

• Flow right to left

  Pass

  Fail

  N/A

• Connect loop to head - secure screws

  Safe

  At Risk

  N/A

• Connect BOV hose

  Yes

  No

  N/A

09. Electronic Checks

• Is handset functioning correctly

  Yes

  No

  N/A

• Are batteries working

  Yes

  No

  N/A

• Check voltage for computer and solinoid

  Yes

  No

  N/A

• Is correct gas visible

  Yes

  No

  N/A

10. Pressure tests

• Perform positive pressure test - turn off valves and breathe in to loop, close and wait 120 sec.

  Pass

  Fail

  N/A

• Perform negative pressure test - breathe gas from loop to completly empty, clos and wait 120 sec.

  Pass

  Fail

  N/A

• Check shut off valves - both DIL and O2

  Yes

  No

  N/A

• Perform pressure drop test; Turn on computers, switch to surface po2 (0.19). Open DIL and O2 valves SLOWLY. Circulate gas in loop. Close valves and ensure NO pressure drop in entire system.

  Yes

  No

  N/A

11. Pre-breathing

• Recheck settings on handset, low SP 0.5, CC/OC, BOV function.

  Safe

  At Risk

  N/A

• Pre breathe in min. 3 min.

  Yes

  No

  N/A

• Does the ADV work

  Yes

  No

  N/A

• Confirm what position the OPV will be left in (dive)<br>

  Yes

  No

  N/A

12. Last check - on site, before entering water

• All valves open

  Yes

  No

  N/A

• Pre breathe again

  Yes

  No

  N/A

• Lead?

  Yes

  No

  N/A

• Lights and heating on board

  Yes

  No

  N/A

13. Comments

• Additional comments

• Photographs

  Media

• I have fully prepared and tested the unit I will be diving with

  Sign