A&D 2 Plus - Manual (Page 9)

PLANNING A DECOMPRESSION DIVE
Before planning a decompression dive, reread the import warning at
the beginning of this section.
STEP 1 When the Monitor 2+ scrolls to
the desired depth, touch
contacts A & D. The word “Add”
appears in the depth zone, the
flashing dive time is now one
minute more than the allowable
no-stop time, and all decom-
pression information is
displayed, including stop depth,
stop time, and total ascent time.
Increase the dive time by touching contacts
A & C. If you increase the dive time too much and want
to reduce it, touch contacts A & B.
STEP 2
Increase Time
Decrease Time
When you reach the desired dive
time, release the contacts. After a few
moments, the Monitor 2+ will display
the new decompression information,
including the first decompression
stop, time at the first stop, and total
ascent time. You can then, as shown
in step 2, increase and decrease the
dive time as you wish.
To return to the pre-dive scrolling,
touch contacts A & D. If you want to
STEP 3
Note: If there is no activity during the Pre-Dive Planning Mode for three
minutes, the M2+ automatically returns to Surface Mode or Ready
Mode.
To return to Surface Mode or Ready Mode, touch
contacts A & D until you hear two beeps.
STEP 4
WARNING: If two or more divers using computers are
planning a dive, planning for all divers must be based on
the dive computer showing the shortest no-stop times.
Failure to do this may lead to serious injury or death from
OVERVIEW
The M2+ is a robust instrument designed to withstand the rigors of
SCUBA diving. However, you still need to protect it from shock,
extreme heat, chemical attack, and tampering.
Even though the M2+’s material is tough and durable, it is suscep-
tible to chemical attack and scratches. Chemical attack can be in the
form of spray propellants, gasoline fumes in your garage or boat, and
alcohol. U.S. Divers cannot replace scratched gauge faces. However,
small scratches naturally disappear underwater.
CAUTION: Never use aerosol sprays, including silicone
sprays, on or near the M2+. The propellants may chemi-
cally attack the plastic, causing the plastic case to crack.
CARE BEFORE THE DIVE
The M2+’s plastic housing is made of a shock resistant resin. This
housing protects the M2+ from the normal bumps that occur when
diving. However, the computer cannot withstand the impact of heavy
objects, such as weight belts or SCUBA cylinders. Impact from heavy
objects is the most common cause of computer damage. When you set
up your dive gear on a boat or the beach, keep the M2+ protected
until you are ready to dive. Never leave the computer exposed where
someone could accidentally step on it, or drop something on it.
CARE DURING THE DIVE
The most common damage inflicted on a computer while underwater
is scratches to the computer face. Scratches occur when a dangling
computer console gets dragged over coral or rocks. Most buoyancy
compensators have gauge hose retainers that keep the computer
close to your body for easy access and reduce the possibility of
scratching the computer face.
CAUTION: Scratches to the computer body or gauge face
are not covered by the Two-Year Limited Warranty
CARE AND MAINTENANCE
CARE AFTER THE DIVE
CAUTION: If the M2+ is not attached to a first-stage
regulator while soaking (explained below), make sure that
water is not allowed to enter the high pressure hose.
Water entering the submersible pressure gauge (SPG) via
the high pressure hose may cause damage to the internal
components.
After each day of diving, soak the M2+ in a warm, fresh water bath
to dissolve salt crystals. To dissolve heavy salt buildup, use a slightly
acidic vinegar/water bath. After removing the computer from the
bath, rinse thoroughly with fresh water. Towel dry the computer
before final storage. Place the M2+ in a cool, dry and protective case
to transport.
If the M2+ is in a console, it should be rinsed at the same time the
regulator is rinsed. Connect the first-stage to a charged SCUBA
cylinder. Turn on the cylinder valve and submerge the whole
regulator/tank system in a bath of water. By applying pressure to
the regulator, you absolutely prevent any water from entering the
regulator, including the high pressure hose.
ANNUAL DEALER INSPECTIONS & FACTORY SERVICE
The M2+ should be inspected annually by an Authorized U.S. Divers
Dealer. The dealer will perform a depth accuracy test, function
check, and routine inspection for damage or wear. To keep the two-
year limited warranty in effect, this annual inspection must be done
one year from the purchase date, plus or minus 30 days. U.S. Divers
recommends that you continue to have yearly inspections to ensure
the M2+ is working properly, even after the warranty period expires.
An annual inspection record is provided in the rear of this manual,
which should be signed by the technician after each inspection. The
cost of this service is not covered under the two-year limited
warranty. Also, be sure to record any factory services that are
performed.