Manual Sherwood Courier CR100 (page 3 of 11) (English)

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8COURIER

OWNER’S MANUAL

2.0 Using the Courier

The key to using the Courier correctly is learning to

access, recognize and interpret the data presented in its

various display modes. The Courier is capable of display-

ing far more data than can fit in a single screen. Thus, to

help avoid confusion, it displays only that data which is

relevant to a particular situation. For example, the data

appearing when the Courier is in its Date/Time Set Mode

is very different from that appearing when it is in Dive or

Deco Mode.

The Courier is capable of presenting ten different dis-

play modes. In the balance of this manual, we will identi-

fy each of these modes, and explain:

■■What the purpose of each mode is.

■■How you enter and exit each mode.

■■What data you will see in each mode, and how to

interpret it.

■■What visible warnings may be displayed in each mode,

and how to respond to them.

2.1 Accessing Display Modes

There are some display modes that the Courier enters

and/or exits automatically. For example, by taking the

Courier under water, you automatically activate its Dive

Mode. After sufficient inactivity, your Courier will automat-

ically enter its Sleep (Battery Saver) Mode.

To access other modes, you may need to push one of

the two large, red buttons appearing on the Courier’s

face. These are the A (Plan) and B (Log) buttons.

COURIER OWNER’S MANUAL 9

Figure 1: The front of the Courier, showing its Liquid

Crystal Display (LCD) in Check Mode, and the two large

A (Plan) and B (Log) buttons.

You will find both buttons easy to use. In some instances,

you may need only press a button once and release it to

achieve the desired result. In other instances, you may

need to hold the button down until you get the result

you wish. This manual will outline clearly which proce-

dure to follow for each mode or task.

2.2 Sleep (Battery Saver) Mode

So long as there is sufficient battery voltage, your Courier

never turns completely off. Even when it appears to be

“asleep,” the Courier monitors factors such as battery volt-

age and altitude. Nevertheless, to prolong battery life,

your Courier is programmed to project data on its Liquid

Crystal Display (LCD) only when absolutely necessary.

SLOW

DECO

min min

min

°F °C

MAX

SURF T.NDL

DIVE TIME NDL

TOTAL

AVE

“A” (Plan)

Button

“B” (Log)

Button

10 COURIER OWNER’S MANUAL

Figure 2: Sleep (Battery Saver) Mode.

To enter this mode: There is actually nothing you can

do to force your Courier into Sleep Mode. If you have

activated your Courier—but not taken it diving—it will

return automatically to Sleep Mode after five to six min-

utes. If, on the other hand, your Courier calculates that

there is still residual nitrogen present from previous dives,

it will not enter Sleep Mode until it determines that all

residual nitrogen is effectively gone.

What you will see: When the Courier is in Sleep Mode,

its Liquid Crystal Display (LCD) will normally be blank, as it

appears in Figure 2.

Warnings you may encounter: As shown in Figure 2,

there is one warning that may appear, even though the

rest of the Courier is “asleep.” This is the Low Battery

warning. This warning may or may not blink on and off.

The Low Battery warning means that the Courier’s battery

lacks sufficient voltage to function properly.

Once the Low Battery warning appears, it will remain

visible in all display modes except Log Mode. Additionally,

the presence of the Low Battery warning will prevent the

Courier from entering Dive Mode—a feature designed to

help prevent the Courier from failing under water.

Appears if

battery is low

(computer will not

enter Dive mode)

COURIER OWNER’S MANUAL 11

Once the Low Battery warning appears, you

must return your Courier to your local autho-

rized Sherwood distributor for battery replace-

ment, or replace the battery yourself, following

the procedures outlined later in this manual.

Before replacing your Courier’s battery, be sure

to copy all dive log data to your log book, as

the battery replacement process erases all such

data from the Courier’s Random Access

Memory (RAM).

The battery that comes with your Courier is designed to

last up to several years under normal use. Several factors

may affect battery life; therefore, do not be surprised if

you get significantly more or less use from your Courier’s

battery.

To exit this mode: You can exit Sleep Mode (i.e, cause

your Courier to “wake up”) by pressing either the A or B

buttons, or by taking it under water.

2.3 Check Mode

When you “awaken” your Courier from Sleep Mode, the

first thing it will do is enter Check Mode. In this mode,

the Courier projects its full segment display. Check Mode

provides you with the opportunity to test your Courier for

proper function before taking it under water.

To enter this mode: From Sleep Mode, press either the

A or B button, or take it under water.

What you will see: As shown in Figure 3, all pixels (pic-

ture elements) on your Courier’s Liquid Crystal Display

(LCD) should appear clearly during Check Mode.

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Sherwood Courier CR100 Manual

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