La Crosse Technology K2 EXTREME User Manual

1.0 Introduction.............................................................................................................................................................

2.0 The K2-100 Parts and Its Functions.........................................................................................................................

3.0 Major Function Modes - Time Keeping, Altimeter and Barometer Mode......................................................................

4.0 Tim e Keeping Mo de and its Su b-displays .......... .......... .......... .......... .......... .......... .......... .......... .......... .......... .......... ...

4.1 Time Keeping Mode - Current Time and Dual Time Display..................................................................................

4.2 Time Keeping Mode - Setting the Current Time and the Dual Time.......................................................................

4.3 Time Keeping Mode - Daily Alarm, Date Alarm and Chime/Alarm On/Off..............................................................

4.4 Time Keeping Mode - Setting the Daily Alarm and the Date Alarm........................................................................

4.5 Time Keeping Mode - Start/Stop the Chronograph...............................................................................................

4.6 Time Keeping Mode - Record/Recall a Lap Memory.............................................................................................

4.7 Time Keeping Mode - Countdown Timer and Repeater Timer....................................................................................

4.8 Time Keeping Mode - Setting the UPV for the Timer and the Timer Counting Display...................................................

4.9 Time Keeping Mode - Using the Timer................................................................................................................

5.0 Alt imeter Mode and its sub- displays.. .......... .......... .......... .......... .......... .......... .......... .......... .......... .......... .......... .........

5.1 Alt imeter Mode - Altitude G raph Displa y......... .......... .......... .......... .......... .......... .......... .......... .......... .......... ..........

5.2 Alt imeter Mode - Altitude H istory Grap h Scale.... .......... .......... .......... .......... .......... .......... .......... .......... .......... .......

5.3 Alt imeter Mode - Calibrate the Altimet er........ .......... .......... .......... .......... .......... .......... .......... .......... .......... .......... .

5.4 Alt imeter Mode - Set the Alt itude Alarm .......... .......... .......... .......... .......... .......... .......... .......... .......... .......... ..........

5.5 Alt imeter Mode - Normal Alt itude and Re lative Alt itude..... .......... .......... .......... .......... .......... .......... .......... .......... ..

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5.6 Altimeter Mode - 24 Hour Memory (the History Graph).......................................................................................

5.7 Altimeter Mode - Ascending and Descending Rate of the 24 Hour Memory.........................................................

5.8 Altimeter Mode - The User Log Memory (ULM)..................................................................................................

5.9 Altimeter Mode - Set the Sampling Rate of ULM................................................................................................

5.10 Altimeter Mode - Start the Recording of the ULM.............................................................................................

5.11 Altimeter Mode - Recall the ULM Altitude Memory Segment.............................................................................

5.12 Altimeter Mode - Recall the ULM Altitude Memory Record................................................................................

6.0 Barometer Mode and its sub-displays......................................................................................................................

6.1 Barometer Mode - Barometric Pressure Graph Display...........................................................................................

6.2 Barometer Mode - Pressure History Graph Scale...................................................................................................

6.3 Barometer Mode - Implication of the Barometric Pressure History Graph...........................................................

6.4 Barometer Mode - Calibrate the Barometer........................................................................................................

6.5 Barometer Mode - 48 Hour Memory...................................................................................................................

6.6 Barometer Mode - Ascending / Descending Rate of the 48 Hour Memory...........................................................

7.0 Specifications.........................................................................................................................................................

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K2 EXTREME

K2-100

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Thanks for your purchase of the K2-100.
Your K2-100 features an electronic sensor that measures

the o utdo or con ditio ns suc h as temp erat ure, press ure and
alti tude.

Your K2-100 provides the essential information while
you are performing hiking, climbing and other outdoor
activities.

Your K2-100 also includes normal time, dual time, daily
alar m, chron ograp h and timer .

Your K2-100 is carefully designed and produced for
ou tdo or a ct ivi ti es, in or der to ut il ize the se fe at ure s of
your K2-100, it is advisable to read the following
inst ructi ons:

- Read the instructions before you use the K2-100.

- Avoid exposing your K2-100 to extreme conditions for
an unreasonable amount of time.

- Avoid rough usage or severe impacts to your K2-100.

- Do not open the K2-100's case. Only a certified
service agency should service the unit as your K2-100
contains precise electronic sensors and components.

- Clean your K2-100 with a soft cloth occasionally to
prolong the life of you watch.

- Store your K2-100 in a dry place when it is not in
use.

1.0 Introduction

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3

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2.0 The K2-100 Parts and Its Functions

3.0 Major Function Modes - Time Keeping, Altimeter and Barometer Mode

Time Keeping Mode

mode

button

PU strap

pointer

adjust
button

start/stop
button

rotatory
ring

lap/reset
button

mode
button

light
button

display

mode
button

mode
button

Altimeter Mode

Barometer Mode

P

Mode Button

- To select among Time Keeping Mode, Barometer Mode
and Altimeter Mode.

- Press and hold for 2 seconds to enter setting modes.

- To select sub function of Time Keeping Mode, Barometer
Mode and Altimeter Mode.

- To select the items in setting modes.

- To select Altitude 24 hour memory.

To select Barometric Pressure 48 hour memory.

- To increase the number during setting.

- To start / stop the chronograph and timer.

- To switch between Current Time and Dual Time Display

- To decrease the number during setting.

- To record lap memory in Chronograph Mode.

- Press and hold for 2 seconds to reset lap memory in
Chronograph Mode.

- To select history graph scale information.

- Press and hold for 2 seconds to switch among sensor
units.

- To exit setting sequences.

Adjust Button

Start/Stop Button

Lap/Reset Button

m

C

P

hPa

mb

P

C

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4.0 Time Keeping Mode and its Sub-displays

Current Time Display

adjust
button

adjust
button

adjust
button

adjust
button

start/stop

button

start/stop

button

Dual Time Display

Chronograph Display

Countdown Timer Display Repeater Timer Display

P

P P

P

A

A

A

6

7

Current Time and Dual Time Display

- Press the [start/stop] button once to switch between
the Current Time Display and the Dual Time Display.

Current Time Display

- The 1st row of the display shows the Pressure History Graph
of the last 48 hours;

- The 2nd row of the display shows the current
time in hour, minute and second;

- The 3rd row of the display shows the month, day and day of
week.

- Press and hold the [lap/reset] button for 2 seconds to select
between 'second' display or 'temperature' display.

Dual Time Display

- The 1st row of the display shows the Dual Time Display
Indicator.

- The 2nd row of the display shows the dual time in hour,
minute and second;

- The 3rd row of the display shows the month, day and day of
week for the dual time.

NOTE:

-

To use the Pressure History Graph, check the 'Implication of

the Pressure History Graph ' section for more detail.

4.1 Time Keeping Mode - Current Time and Dual Time Display

start/stop

button

mode
button

start/stop

button

hold

adjust

Dual Time Display

Current Time Setting Display

Dual Time Display

pressure history graph

dual time
display Indicator

digits have been
selected (flashing)

Current Time Display

Current Time Display

Current Time Display

day of week day of week

month monthdate date

current time

dual time

4.2 Time Keeping Mode - Setting the Current Time and the Dual Time

second

12/24

hour format

display
contrast

minute hour

day

year

month

To Set the Time and Date

- To set the date and time, press and hold the [adjust]
button for 2 seconds to change from the Current Time
Display to Current Time Setting Display.

- The second digits flash on the display because they are
being selected.

The Setting Procedure

- Press [adjust] button to change the selection as in the
Current Time Setting Sequence.

- While digits are flashing (selected), press the [start/stop]
button to increase the number; press the [lap/reset] button
to decrease the number. Hold the button to change
the number at a higher speed.

- While display contrast setting is being selected, press the
[start/stop] button to increase the number. Press the
[lap/reset] button to decrease the number. 15 gives a
darker display; 0 gives a lighter display.

- After you set the time, date, display format and display
contrast, press the [mode] button to exit the Current Time
Setting Sequence.

- If no button is pressed in the setting display for about 3
minutes the K2-100 will return to the Current Time
Mode automatically

To Set the Dual Time

- To set the date and time, press and hold the [adjust]
button for 2 seconds to change from the Dual Time
Display to Dual Time Setting Display.

- Follow the Current Time Setting steps to set the
subsequent settings of the dual time.

Current Time Setting Sequence

adjust

adjustadjust

adjust

adjust

adjust

hold

adjust

mode
button

adjust adjust

8

Daily / Date Alarm Displays

Current / Dual Time Display

Switch between the Current / Dual Time Display

Switch between the Daily / Date Alarm Display

4.3 Time Keeping Mode - Daily Alarm, Date Alarm and Chime/Alarm On/Off

start/stop

start/stop

Daily Alarm and Date Alarm Display

- K2-100 has two alarm modes: The Daily Alarm and
the Date Alarm.

- The Daily Alarm and the Date Alarm work
independently.

- When the Daily Alarm is ON, the K2-100 sounds at the
preset alarm time every day.

- When the Date Alarm is ON, the K2-100 sounds at the
preset alarm time on the schedule date.

- Press the [start/stop] button to switch between
the Daily Alarm Display and the Date Alarm Display.

To Set the Daily Alarm and Chime On or Off

- Press the [lap/reset] button to change the ON/OFF status
of alarm and the hourly chime, in the Daily Alarm Display.

- When the alarm indicator appears (alarm
ON), the K2-100 sounds at the preset alarm time
every day.

- When the chime indicator appears (chime ON),
the K2-100 beeps every hour on the hour.

- To stop the sound, press any button to stop the alarm.

To Set the Date Alarm On or Off

- Press the [lap/reset] button to change the ON/OFF status
of the alarm, in the Date Alarm Display.

- When the alarm indicator appears (alarm ON),
the K2-100 sounds at the preset alarm time on the
preset date.

Date Alarm Display

Date Alarm Display

Daily Alarm Display

Daily Alarm Display

daily alarm
indicator

date alarm
indicator

current time

alarm time

P

A

P

A

P

A

P

A

the alarm
date

Daily Alarm Display

P

A

Date Alarm Display

P

A

hPa

Increase
the number

Decrease
the number

Increase the minute
at a higher speed

Decrease the number
at a higher speed

start/stop hold start/stop lap/reset hold lap/reset

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4.4 Time Keeping Mode - Setting the Daily Alarm and the Date Alarm

To Set The Daily Alarm

- Press and hold the [adjust] button for 2 seconds to change
from Daily Alarm Display to Daily Alarm Setting
Display.

- The hour digits flash on the display because it is being
selected.

The Setting Procedure

- Press [adjust] button to change the selection in the
Daily Alarm Setting Sequence.

- While any digits are flashing (selected), press the [start/stop]
button to increase the number; press the [lap/reset] button to
decrease the number. Hold down the button to change the
number at a higher speed.

- After you set the alarm time, press the [mode] button to exit
the setting sequence.

- If no button is pressed in the setting display for about 3
minutes, the K2-100 will return to the Alarm Time Mode
automatically

To Set The Date Alarm

- Press and hold the [adjust] button for 2 seconds to change
from Date Alarm Display to Date Alarm Setting Display.

- The hour digits flash on the display because it is being
selected.

The Setting Procedure

- Press the [adjust] button to change the selection in the
Date Alarm Setting Sequence.

- Follow the Daily Alarm Setting steps to set the
subsequent settings of the Date Alarm.

Daily/Date Alarm Display

Daily/Date Alarm Setting Display

Daily Alarm Setting Sequence

Date Alarm Setting Sequence

month day

adjust

adjust adjust adjust

adjust

adjust

hour digits
have been
selected
(flashing)

A

A

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4.5 Time Keeping Mode - Start/Stop the Chronograph

Chronograph Mode

- The Chronograph measures elapsed times and lap­times.

- The display shows the 'All Zeros' display when the
chronograph is being selected the first time or the
chronograph is reset.

- The chronograph resolution in 1/100 second.

To Start/Stop the Chronograph

- When the chronograph is idle, press the [start/stop]
button to start the chronograph; press the [start/stop]
button once again to stop the chronograph.

- The elapsed time between the 2-[start/stop]-keystoke
will appear on the display.

- Repeat the steps mentioned above to get another set
of elapsed time.

To Reset the Chronograph

- To record a new set of elapsed times, press and
hold the [lap/reset] button for 2 seconds to reset
the chronograph to the 'All Zeros' display.

Chronograph

Running Display

Chronograph Stop Display

Chronograph
'Zero' Display

start/stop

start/stop

hold

lap/reset

the digits
stop running

the digits
keep running

1/100 sec

chronograph
display indicator

hour minutes seconds

start/stop

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4.6 Time Keeping Mode - Record/Recall a Lap Memory

Chronograph

LapDisplay

Chronograph

Running Display

lap/reset

To Record Lap Memory

- The Chronograph Mode allows you to record up to 10
lap memories.

- Press the [lap/reset] button once to record the lap
memory while the chronograph is running.

- The lap number will be displayed at the right hand side of
the display for 5 seconds, as well as the lap time display
on the bottom row of the display. Then the chronograph
starts running again automatically.

- While the lap number and lap time are displayed, the
chronograph keeps running.

- Repeat the steps mentioned above to get another set of
lap memory.

To Recall Lap Memory

- Press and hold the [adjust] button to enter the lap
memory recall sequence, in the Chronograph Stop Display.

- Press the [lap/reset] button to switch among the lap
memories.

- Press the [mode] button to exit the lap memory recall
sequence.

To Reset Lap Memory

- To record new sets of lap time, press and hold the
[lap/reset] button for 2 seconds to reset the chronograph
lap memory while the chronograph is stopped.

5 second

the digits
is running

the lap
number

Chronograph
Stop Display

lap memory recall

sequence

lap/reset

1st lap memory

the next

lap memory

mode

hold adjust

To record the Lap Memory

To recall the Lap Time

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4.7 Time Keeping Mode - Countdown Timer and Repeat Timer

Countdown Timer and Repeat Timer Display

- The K2-100 has two timer counting displays:
Countdown Timer and Repeat Timer.

- The Countdown Timer starts counting from the preset
value to zero and stops at zero.

- The Repeat Timer starts counting from the preset
value to zero and then the timer restarts the counting
again and again automatically until the [start/stop] button
is pressed.

- To select between Countdown Timer and Repeat
Timer Display, check the 'Setting the Timer Counting
Display' section for more detail.

The Timer Display Format

- The 1st row of the display shows the Countdown Timer
or the Repeat Timer indicators.

- The 2nd row of the display shows the digits, which the
timer starts counting down from.

- The 3rd row of the display shows the digits, which the
timer is going to be set at.

To set the Timer from the Quick-Set-Values

- Press the [lap/reset] button to select among the 5
quick-set-values (3,5,10,15 and 45 min) and the existing
User Pre-set Value (UPV) as in the

- When the desired value displays on the 3rd row of the
display, press and hold the [lap/reset] button for 2
seconds to load that value to the 2nd row of the display.
The timer is now set.

- To set the timer values other than the 5 quick-set-value
and the existing UPV, check the 'To Set the User Pre-set
Value' section for detail.

Timer Setting

Sequence.

Count Down Timer Display Repeater Timer Display

3 min

User
Pre-set
Value
(UPV)

5 min

45 min

10 min

15 min

Timer Setting Sequence

lap/reset lap/reset

lap/reset lap/reset lap/resetlap/reset

the setting row

the counting row

the counting row

countdown timer
display indicator

hPa

repeater timer
display indicator

hour

minute

minute

mode
button

hold

adjust

hold

adjust

mode
button

Increase
the number

Decrease
the number

Increase the minute
at a higher speed

Decrease the number
at a higher speed

start/stop hold start/stop lap/reset hold lap/reset

hour

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Altimeter Graph Display

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4.8 Time Keeping Mode - Setting the UPV for the Timer and the Timer Counting Display

UPV and Timer Counting Display Setting Sequence

Timer Display

digits have been
selected (flashing)

User Pre-set Value (UPV)

Setting Display

C (Celsius)
m (Meter)

C (Celsius)

ft (Feet)

F(Fahrenheit)

ft (Feet)

F (Fahrenheit)

m (Meter)

hold

lap/reset

hold

lap/reset

hold

lap/reset

hold

lap/reset

Unit Selection Sequence

Graph Scale Display

24 Hour Memory Display

Altitude Setting Sequence

To view the memory

by forward scrolling

(from -24 hour to -15 min.

To view the memory

by backward scrolling

(from -15 min. to -24 hour)

To Set the UPV and the Timer Counting DIsplay

- Press and hold the [adjust] button for 2 seconds to
change the display from Timer Display to User Pre-set
Value Setting Display.

- The hour digits flash on the display because it is
being selected.

The setting procedure

- Press [adjust] button to change the selection as in the
User Pre-set Value Setting Sequence.

- While digits are being selected (flashing), press the
[start/stop] button to increase the number; press the
[lap/reset] button to decrease the number. Hold down the
button to change the number at a higher speed.

- When the FLASHING PART moves to "REPEAT" or
"COUNT " character, just press [start/stop] or [lap/
resst] button to select the Countdown timer or Repeater
timer.

- After you set the timer, press the [mode] button to exit
the setting sequence.

- If no button is pressed in the setting display for about 3
minutes, the K2-100 will return to the Timer Mode
automatically

hour

secondminute

Timer Counting Display

(Countdown Timer or

Repeater Timer)

adjustadjust

adjustadjust

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To Use the Timer

- When the Timer is set, press the [start/stop] button to
start the timer. Press the [start/stop] button again to stop
the timer.

- The time to 'Zero' will be shown on the display.

- The timer starts to beep every second when it is 5
seconds from the end of the countdown.

- When the countdown time is reached, a long beep that
lasts for 2 seconds will be heard.

- Pressing any button in this period will terminate the beep
sound prematurely.

- The user preset time will be loaded automatically at the
end of the beep sound.

To Reset the Timer

- Press and hold the [lap/reset] button for 2 seconds to
reset the timer after it has stopped.

4.9 Time Keeping Mode - Using the Timer

Timer Display

(Timer sets as 1 minute)

Counting Display

Stop Counting Display

Counting Display

digits start
counting

digits stop
counting

digits start
counting
again

start/stop

start/stop

start/stop

hold

lap/reset

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5.0 Altimeter Mode and its sub-displays

5.0 Altimeter Mode and its sub-displays ... continue

15

Altimeter Graph Display

adjust
button

hold

lap/reset

mode
button

hold

adjust

lap/reset

button

adjust
button

adjust
button

adjust
button

adjust
button

adjust
button

mode
button

start/stop

lap/reset

m

P

mode
button

mode

button

hold

adjust

hold

adjust

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5.3 Altimeter Mode - Calibrate the Altimeter

5.4 Altimeter Mode - Set the Altitude Alarm

Before Calibrating the Altimeter

- The altimeter's calibration procedure is designed for
use in the normal altimeter mode.

- As the altitude is calculated from the air pressure,
the change of air pressure will affect the altitude reading.

- To achieve a more accurate reading, the K2-100 needs to
be calibrated from time to time as pressure may change
gradually even within hours.

- Calibration of the K2-100 must occur at a known

altitude, such as at sea level or beside an altitude sign pole,
as that altitude value has to be entered into the K2-100
during the calibration procedure.

Important: Entering an incorrect altitude in the calibration

procedure will result in a mistaken altitude in the future.

Altitude Calibration Procedures

- Press and hold the [adjust] button for 2 seconds to enter the
Altitude Calibration Display.

- Press the [adjust] button once again to enter the calibration
sequence, the digits of the middle row of the display and the
altitude unit will start flashing.

- Press the [start/stop] button to increase the number; press
the [lap/reset] button to decrease the number. Holding down
the button changes the number at a higher speed.

- After you set the altitude, press the [mode] button to exit the
setting sequence.

- Press the [mode] button once again to return to
Altitude Graph Display.

Altitude Alarm 1 and 2

- The K2-100 has two built-in altitude alarms: Altitude
Alarm 1 and Altitude Alarm 2 that work independently.

- The Alarm icon will flash and the K2-100 will sound for 10

seconds when you pass through the Altitude Alarm Limit,
either below or above the limit.

- When the alarm sounds, press any button to stop the alarm.

- The Altitude Alarms can be set within the range from

-30065ft to 30065 ft (-9164m to 9164m).

- If two Altitude Alarms are set at the same altitude limit value,

the Altitude Alarm 1 will be activated only.

To Set the Altitude Alarm Limit and set the Alarm 1 ON/OFF

- Press and hold the [adjust] button for 2 seconds to enter

Altitude Calibration Display. Press the [adjust] button once
again to select the Altitude Alarm 1 Display.

- Press and hold the [adjust] button to enter the Altitude Alarm

Setting Display. In the setting display, the altitude digits and
the altitude unit will flash. Press the [start/stop] button to
increase the altitude number; press the [lap/reset] button to
decrease altitude number. Holding down the button changes
the altitude at a higher speed.

- Once you change the altitude alarm, the Altitude Alarm

1 turn ON automatically. After you set the altitude alarm,
press the [mode] button to exit the setting sequence.

- Press the [lap/reset] button to turn the alarm ON or OFF.

- Press the [mode] button once again to return to the Altitude

History Graph Display. A dotted line will show on the display
to illustrate the Alarm 1's limit.

To Set the Altitude Alarm 2

- Set the Altitude Alarm 2 in the same manner as setting

Altitude Alarm 1.

Altitude Graph Display

Altitude Graph

Display

Altitude History Graph

Temperature
in degree Celsius

Altitude in meter

Altitude history graph

the altitude
variable
(Y-axis)

the time variable
(X-axis)

Real time

Altimeter Graph Display

- In the Altimeter Graph Display, the 1st row of the display
shows the altitude history graph of the last 24 hours.

The 2nd row of the display shows the altitude
and the current temperature.

- The 3rd row of the display shows the current t

ime:

hour

minute and second.

The Altitude History Graph

- The K2-100 stores the altitude values automatically
as time goes by.

- The Altitude History Graph of the Altitude Graph Display
is plotted by these historical altitude values.

- The X-axis of the history graph is time variable; the Y­axis of the history graph

is altitude variable. The A

ltitude

History Graph makes up 11 rows and 40 columns.

- The memory on the left hand side of the history graph
is recorded early than those on the right.

- The scale of the Y-axis of the history graph is changeable,
the scale will be changed in order to fit in the altitude
values. Check the 'Altitude History Graph Scale' section
for more detail on the scale of the history graph.

To Switch among Units

- The K2-100 can display altitude in meter (m) or feet (ft);
the K2-100 can display temperature in Celsius ( C) or
Fahrenheit ( F).

- Press and hold the [lap/reset] button to change the units
as in the units select sequence.

Altitude History Graph Scale

- The scale of the Y-axis of the History Graph is varied
for fitting all the alt

itude memory into the grap

h.

- Press the [lap/reset] button once to view the altitude
scale information, in the Altitude Graph Display,

- The 'GRAPH SCALE' message will slide out and display
for 3 seconds, then the X-axis and Y-axis resolutions
will be shown.

- For example, 'X=0:15'00"' implies that the resolution of
X-axis is 15 minute per column; at the same time,
'Y=20m' implies that the resolution of Y-axis is 20
meter per row.

- The maximum and the minimum altitudes of the History
Graph will be shown on the display a while later.

- For example, 'MAX 151M' implies that the current
maximum altitude of the Altitude History Graph is 151
meter. 'MIN 0m' implies the current minimum altitude of
the Altitude History Graph is 0 meter.

NOTE:

- The resolution of X-axis of the history graph (time
variable) is fixed as 15 minutes.

- The resolution of Y-axis of the history graph (altitude
variable) is ranging from 1,2,5,10,20,50,100,200,500,1000
to 2000 meters.

5.1 Altimeter Mode - Altitude Graph Display

C (Celsius)

m (Meter)

C (Celsius)

ft (Feet)

F(Fahrenheit)

ft (Feet)

F (Fahrenheit)

m (Meter)

hold

lap/reset

hold

lap/reset

hold

lap/reset

hold

lap/reset

lap/reset

button

Unit Selection Sequence

5.2 Altimeter Mode- Altitude History Graph Scale

History Graph Scale Display

altitude

total display time
(15 min. X 40 column=600 min or 10 hour)

total display altitude
(Y axis resolution X 11 row)

Y-axis

resolution

1, 2, 5, 10

20, 50

100, 200, 500

1000, 2000

meter(s)

X-axis

resolution

15 minutes

hold

adjust

hold

adjust

adjust
button

Altitude Alarm 1 Setting Sequence
( Set the Altitude Alarm 1 as 129m)

Increase
the altitude

mode
button

mode

button

Altitude Graph Display

lap/resetstart/stop

digits have been
selected (flashing)

alarm
limit line

alarm 1 ON
indicator

digits
flashing

Decrease
the altitude

start/stop lap/reset

hold

adjust

hold

adjust

Calibration Sequence
( Calibrate the altitude from 123 to 128m)

Increase
the altitude

hold

adjust

Altitude in meter

Altitude History Graph

digits flashing

mode
button

mode

button

Altitude Graph Display

Decrease
the altitude

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adjust
button

flashing
column

ascending or

descending rate

flashing
column

24 Hour Memory Display
( the newest memory)

24 Hour Memory Display
(the oldest memory)

hold

adjust

adjust

button

lap/reset

button

lap/reset

button

adjust

button

adjust
button

adjust
button

hold

adjust

Relative Altitude Setting Sequence

Relative Altitude DisplayNormal Altitude Display

mode

button twice

To view the memory
by forward scrolling

(from -24 hour to -15 min.

To view the memory

by backward scrolling

(from -15 min. to -24 hour)

24

Altitude Graph Display

adjust
button

Ascending / Descending

Rate Display

5.7 Altimeter Mode - Ascending and Descending Rate of the 24 Hour Memory

lap/reset

To view the memory

by forward scrolling

(from -24 hour to -15 min.)

To view the memory

by backward scrolling

(from -15 min. to -24 hour)

mode
button

adjust
button

adjust
button

start/stop

22

23

5.6 Altimeter Mode - 24 Hour Memory (the History Graph)

21

Normal and Relative Altitude

- The K2-100 measures Normal and Relative

Altitudes.

- Normal altitude is the difference between your current
altitude and SEA LEVEL. (Assuming that air pressure at
sea level is 1013.21mbar).

- Relative altitude is the difference between your
current altitude and the altitude of a specific altitude level
at which you set the altimeter to 'Zero'.

- To use relative altitude, for example, measure the
altitude difference between the starting point and the
finish points of a trek.

- To measure the altitude difference, set the K2-100 to
Relative Altitude display at the starting point of the trek,
the K2-100 will automatically set the altitude to 'Zero'.

- Check the altitude at the finish point of the trek, the
K2-100 will show the altitude difference on the
display.

To Switch between the Normal and Relative Altitude

- Press and hold the [adjust] button for 2 seconds to enter
Altitude Setting Display. Press the [adjust] button four
times to select the Normal / Relative Altitude Display.

- Press and hold the [adjust] button to enter the setting
display of the Normal / Relative Altitude Display. Press
the [lap/reset] button to switch between the Normal and
Relative Altitude.

- After you set the altitude, press the [mode] button to
exit the setting sequence. Press the [mode] button once
again to return to the Altitude Graph Display.

24 Hour Memory

- The K2-100 has two altitude memory functions: the 24
Hour Memory and the User Log Memory.

- 24 Hour Memory automatically records the altitude values
for every 15 minutes of the last 24 hours.

- These figures can be reviewed in the 24 Hour
Memory Display.

Review the 24 Hour Memory

- Press the [adjust] button to select the 24 Hour Memory
Display, in the Altitude Graph Display.

- The 'ALTIMETER 24 HR MEM' will slide out and display
for 3 seconds, the 'MEM' indicator will be shown as
well.

- The Altitude 24 hour's history graph shows on the 1st row
of the display.

- The altitude memory and temperature shows on the 2nd
row of the display.

- The time that the memory was recorded will show on
the 3rd row of the display.

- Press the [lap/reset] button to view the memory through
backward scrolling (from -15min to -24hour), press the
[start/stop] button to view the memory through forward
scrolling (from -24 hour to -15 min).

Note:

- The memory columns on the left hand side of the
history graph are recorded early than those on the right.

- The flashing column of the history graph indicates which
memory is displaying during the 24 hour memory
reviewing.

5.5 Altimeter Mode - Normal Altitude and Relative Altitude

Altitude Graph Display

Altitude Graph Display

start/stop lap/reset

lap/reset

button

mode
button

5.8 Altimeter Mode - The User Log Memory (ULM)

User Log Memory

- The K2-100 has a built-in altitude memory function - User

Log Memory (ULM).

- The user can set the starting/finishing time and the
sampling interval of the ULM. For example, start the
recording of the ULM at the starting point of a trek, stop
the recording of the ULM at the finish point of that trek,
and set the sampling rate as 30 minutes.

- Check the 'To Set Sampling Rate' section for setting the
sampling rate of the ULM.

The Altitude Logbook, Altitude Memory Record and
Altitude Memory Segments

- The altitude memory records is the altitude data of
each sampling during the ULM recording.

- The altitude memory segment is a group of altitude
memory records of one ULM recording

.

- The altimeter logbook stores all altitude memory segments.

The Feature of the User Log Memory

- During the review of the ULM segments or records,
the K2-100 shows the following:

1. The date which the memory segment was recorded,

2. The time span of the memory segment,

3. The time which the altitude record was stored,

4. The temperature at which the altitude record was

stored,

5. The scale of the history graph,

6. The max and min altitudes of the history graph,

7. The ascend/descend rate (the difference between two

memory records) of the altitude record,

8. The accumulative ascend (the total ascending) and,

9. The accumulative descend (the total descending) of the

altitude record.

ULM
Altimeter
Logbook

starting point
of a trek
(start recording)

8 March 2001
AM 8:00 00

The date which the memory segment was recorded: 8 March 2001
The time span of the memory segment: 5:00 00

8 March 2001
PM 1:00 00

altitude memory
record

altitude memory
segment

0

300
200
100

400

500

600

m

700

30

60 90 120 150 180 210

the sampling rate = 30 minutes

240 270 300 minute

Finish point
of a trek
(stop recording)

The Relationship between Altimeter Logbook,

Altitude Memory, Segment and Altitude Memory Record

ULM
Altitude Memory
Segment

ULM
Altitude Memory
Record

Ascending and Descending Rate

- The K2-100 has a built-in function for calculating the ascending
and descending rate of the Altitude of the last 24 hours.

- The ascending and descending rate is the altitude
difference between two memory records.

- A (+) value implies ascending rate; a (-) value implies a
descending rate.

- These rates can be reviewed in the Ascending/
Descending Rate Display.

Review the Ascending and Descending Rate

- Press the [adjust] button three times to select the
Ascending / Descending Rate Display, in the Altitude
Graph Display.

- While the Ascending / Descending Rate Display is shown,
the Altitude Ascending or Descending Rate shows on the
1st row of the display.

- The altitude memory and temperature show on the 2nd
row of the display.

- The time that the memory was recorded shows on
the 3rd row of the display.

- Press the [lap/reset] button to view the memory by
backward scrolling ( from -15 min. to 24 hour), press the
[start/stop] button to view the memory through forward
scrolling (from -24 hour to -15 min.).

- While these displays are shown, press the [mode] button
to exit the reviewing and the display will return
to the Altitude Graph Display.

20

21

22

23

GB

GB

GB

GB

27

26

25

28

Altitude Graph DisplayAltitude User Log Memory

Recording Display

Altitude Graph Display

Free
Record
Display

Free Record Graph Display

start/stop

button

adjust &

start/stop

start/stop

button

lap/reset

button

lap/reset

button

mode
button

adjust &

start/stop

mode

button

flashing

indicator

the user log memories
start recording

user log memory
log book indicator

log book
indicator

total no. of
free records

time span
of this
segment

the 1st
altitude
memory

the altitude
memory

total no. of the
memory segments
are in use

the date which
this memory
segment
was recorded

the memory
number

the history
graph

the time which
this memory segment
was started

the time which
this memory
segment
was started

the segment
number

5.11 Altimeter Mode - Recall the ULM Altitude Memory Segment

5.12 Altimeter Mode - Recall the ULM Altitude Memory Record

Select the User Log Memory Segment

- Before viewing the detail of the memory, check the
following procedure to select the desire memory segment.

- Press the [adjust] and [start/stop] button together in the
Altitude Graph Display, the 'ALTIMETER LOG BOOK' will
slide out and display for 3 seconds, the K2-100 will
switch to the Free Records Display automatically.

- During the Free Records Display, the total number of free
records segments will show on the display, as well as
the 'RECALL' indicator.

- Press the [adjust] button once again to select the
Segment Display. During the Segment Display, the related
information of this altitude memory segment will show on
the display.

- Press the [start/stop] button to select among the
segments through forward scrolling; press the [lap/reset]
button to select among the segments through backward
scrolling.

- When the desired segment is displaying, press the
[adjust] button once to review the altitude memory record
of this segment.

NOTE:

- The maximum number of records in one segment is 1999,
while the total number of record is 2250.

- When the memory is full, a 'MEM FULL' will flashing on
the display.

- Check 'To Delete the User Log Memory Segment' section
for how to delete the User Log Memory Segment.

ULM Altitude Memory Record Display

- When you are reviewing the ULM Altitude Memory Record,
the 1st row of the display shows the Altitude History
Graph.

- The 2nd row of the display shows the altitude memory
and the memory number.

- The 3rd row of the display shows the time which the
memory was recorded.

- Press the [start/stop] button

to review the next Altit

ude
Memory Record of this segment through forward scrolling;
press the [lap/reset] button to review the next Altitude
Memory Record of this segment through backward
scrolling.

- During the ULM Altitude Memory Record reviewing, press
the [adjust] button to check the additional information of
that memory record:

- press [adjust] button once to check the detail of the

history graph (the resolution of X and Y axis, the
X axis' maximum and minimum value)

- press the [adjust] button twice to check the ascending

/ descending rate of the record,

- press the [adjust] button

three times to check t

he

accumulative ascend of the record,

- press the [adjust] button

four times to check t

he

accumulative descend of the record,

- Press the [mode] button once to exit the reviewing display;
press the [mode] button twice to return to Altitude Graph
Display.

NOTE:

- During the ULM Altitude Memory Record reviewing, the
current record will be flashing on the history graph.

5.10 Altimeter Mode - Start the Recording of the ULM

Start/stop the User Log Memory

- Press the [start/stop] button once to start the recording of
the User Log Memory, in the Altitude Graph Display.

- The 'MEM' indicator starts flashing which indicates that
the User Log Memory recording in progress.

Press the [start/stop] button once again to stop the
recording of the User Log Memory.

Free Record Display

- While the User Log Memory is recording (User Log
Memory Recording Display), press the [adjust] and
[start/stop] buttons together to change the display to
Free Record Display.

- The segment number and the number of free record
space is being updated on the Free Record Display.

- Press [lap/reset] button to select between the Altitude
History Graph and the Segment Member.

- Press the [mode] button to return to the User Log
Memory Recording Display.

To Delete the User Log Memory Segment

- Press and hold the [lap/reset] button for 5 seconds in the
Free Record Display to delete all ULM Altitude Memory
Segments.

- To delete an individual ULM Altitude Memory Segment,
press and hold the [adjust] button for 5 seconds in that
ULM Altitude Memory Segment Display.

adjust
button

adjust
button

adjust

button

adjust

button

adjust

button

adjust

button

adjust
button

start/stop

button

start/stop

button

lap/reset

button

lap/reset

button

select the next memory
segment through
forward scrolling

select the next memory
segment through
forward scrolling

select the next
memory through
forward scrolling

select the next memory
segment through
backward scrolling

select the next memory
segment through
backward scrolling

select the next
memory through
backward scrolling

check the detail of
the history graph
of the record

check the ascending/
descending rate of
the record

check the
accumulative ascend
of the record

check the
accumulative descend
of the record

Memory segments

selection sequence

Memory segments

selection sequence

Memory records

selection sequence

the Altitude
History Graph

the no. of
free record
space remain

the segment
in recording

the no. of
free record
space remain

Select the ULM Altitude Memory Segment

5.9 Altimeter Mode - Set the Sampling Rate of ULM

hold

adjust

adjust
button

adjust
button

adjust
button

min.

sec.

hour

Altitude Graph Display

Altitude Sampling Rate

- The sampling rate is used for the User Log Memory
recording. This setting controls the sampling interval of each
log memory.

- There are 4 quick-set-rate (1,10 sec 1 min. and 10 min).
and 1 User Preset Rate (UPR) in the K2-100.

- To set the rate other than the 4 quick-set-rate and the
existing UPR, check the "To Set the User Preset Rate'
section for more detail.

IMPORTANT:To get an accurate result on the altitude ascending
and descending rate, please DO NOT alter the sampling rate
during the time the User Log Memory is recording.

To Select among the Quick-Set-Rates

- Press and hold the [adjust] button for 2 seconds to enter
Altitude Setting Display. Press the [adjust] button three times
to select the Sampling Rate Display.

- Press the [lap/reset] button to select among the 4 quick-set­rates and the existing UPR. When the desired rate is shown,
press the [mode] button to exit the setting.

To Set the User Preset Rate

- Press and hold the [adjust] button to enter the setting display
of the UPR in the Sampling Rate Display. Press the [adjust]
button to change the selection as in the User Preset Rate
Setting Sequence.

- While digits are selected (flashing), press the [start/stop]
button to increase the number; press the [lap/reset] to
decrease the number. Holding down the button changes
the number at a higher speed.

- After you set the rate, press the [mode] button to exit the
setting sequence. Press the [mode] button once again to
return to the Altitude Graph Display.

Altitude Sampling Rate Setting Sequence

adjust mode

adjust

adjust

adjust

mode

button

1 sec.

1 min.

10 sec.

10 min.

UPR

Quick-set

Sampling Rates

UPR Setting

Sequence

lap/reset

button

hold

adjust

mode
button

digits have been
selected (flashing)

24

25

26

27

GB

GB

GB

GB

29

30

6.1 Barometer Mode - Barometric Pressure Graph Display

Barometric Pressure

Graph Display

Temperature
in degree Celsius

Barometric
Pressure

Barometric Pressure
History Graph

Real time

C (Celsius)

hPa/mb

C (Celsius)

inHg

F(Fahrenheit)

inHg

F (Fahrenheit)

hPa/mb

hold

lap/reset

hold

lap/reset

hold

lap/reset

hold

lap/reset

Unit Selection Sequence

Barometric Pressure Graph Display

- In the Barometric Pressure Graph Display, the 1st row of
the display shows the pressure history graph of the last
48 hours.

The 2nd row of the display shows the Barometric
Pressure and the current temperature.

- The 3rd row of the display shows the current time: hour
minute and second.

The Barometric Pressure History Graph

- The K2-100 stores the Barometric pressure values
automatically as the time go by.

The Barometric Pressure history graph of the Barometric
Graph Display is plotted on these pressure values.

--The X-axis of the history graph is time variable; the Y­axis of the history graph is barometric pressure variable.
The Barometric Pressure History Graph is made up
of 11 rows and 40 columns.

- The memory columns on the left hand side of the
history graph are recorded earlier than those on the right.

- The scale of the history graph is changeable, the scale
will be changed in order to fit in the Barometric Pressure
values. Check the 'Barometric Pressure History Graph
Scale' section for more detail on the scale of the history
graph.

To Switch among Units

- The K2-100 can display pressure in millibar (mb) hecto

- Press and hold the [lap/reset] button to change the units
as in the units select sequence.

pascal (hPa) or inch mercury (inHg); the K2-100
can display temperature in Celsius ( C) or Fahrenheit ( F).

C (Celsius)

hPa(mb)

C (Celsius)

inHg

F(Fahrenheit)

inHg

F (Fahrenheit)

hPa(mb)

hold

lap/reset

hold

lap/reset

hold

lap/reset

hold

lap/reset

Unit Selection Sequence

hold

lap/reset

lap/reset

button

Graph Scale Display

6.0 Barometer and its sub-displays ... continue

Barometric Graph Display

31

32

6.2 Barometer Mode - Pressure History Graph Scale

Pressure History Graph Scale

- The scale of the Y-axis of the History Graph is
changeable for fitting all t

he pressure memory into t

he

graph.

- Press the [lap/reset] button once to view t

he pre

ssure
scale information, in the Barometric Pressure Graph
Display,

- The 'GRAPH SCALE' message will slide out and display
for 3 seconds, then the X-axis and Y-axis resolutions
will be shown.

- For example, 'X=1:00'00"' implies that the resolution of
X-axis is 1 hour per column; at the same time, 'Y=0.5mb'
implies that the resolution of Y-axis is 0.5 millibar per
row.

- The highest and the lowest altitudes of the History
Graph will be shown on the display a while later .

- For example, 'HIGHEST 1100.0mb' implies that the
current maximum pressure of the Pressure History Graph
is 1100.0 millibar. 'LOWEST 1000.0m' implies that the
minimum pressure of the Pressure History Graph is

1000.0 millibar.

NOTE:

- The resolution of X-axis of the history graph (time
variable) is fixed as 1 hour.

- The resolution of Y-axis of the history graph ( barometric
pressure variable) is ranging from 0.1, 0.2, 0.5, 1, 2, 5,
10, 20, 50, 100, 200 and 300 millibar.

Pressure
Graph Display

lap/reset

button

History Graph Scale Display

Barometric Pressure

History Graph

the pressure
variable
(Y-axis)

the time variable
(X-axis)

pressure

total display time
(1 hour X 40 column=40 hour)

total display pressure
(Y axis resolution X 11 row)

Y-axis

resolution

0.1, 0.2, 0.5
1, 2, 5

10, 20, 50

100, 200, 300

millibar(s)

X-axis

resolution

1 hour

48 Hour Memory Display

Barometric Calibration Sequence

Barometric Graph Display

adjust
button

mode
button

hold
adjust
mode
button

To view the memory

by forward scrolling
(from -48 to -1 )hour

To view the memory

by backward scrolling

(from -1 to -48 hour)

start/stop

start/stop

lap/reset

lap/reset

Increment the
Barometric Pressure

Decrement the
Barometric Pressure

flashing

digits

6.0 Barometer Mode and its sub-displays

28

29

30

31

60

15

30

45

60

15

30

45

GB

GB

GB

GB

hold

adjust

Calibration Sequence
( Calibrate the Pressure from 1013.8 to 1019.8 mb)

increment
the pressure

mode

button

Barometric Pressure

Graph Display

Decrement
the pressure

digits have
been selected
(flashing)

start/stop lap/reset

hold

adjust

Before Calibrate the Barometer

- The K2-100 was calibrated for you in the factory. For normal

use, you need not to calibrate the Barometer. But for vigorous
users, a calibration procedure has been build in the K2-100.

- Before calibrate the Barometer, you must have the
ambient barometric pressure, because that pressure value
has to be input into the K2-100 during the calibration
procedure.

- You may call up the observatory station at the nearest
location from your current position to get the ambient
barometric pressure.

Important: Inputing an incorrect pressure in the calibration
procedure will result in a mistaken pressure reading in the future.

Pressure Calibration Procedures

- Press and hold the [adjust] button for 2 seconds to change
the display from the Pressure Graph Display to Barometric
Pressure Calibration Display.

- The digits of the middle row of the display and the barometric
pressure unit start flashing because it is selected.

- Press the [start/stop] button to increase the number; press
the [lap/reset] button to decrease the number. Hold down the
button to change the number at a higher speed.

- If you select a wrong barometric pressure unintentionally,
press and hold the [adjust] button for 3 seconds to restore
the setting to the absolute pressure value.

- After you set the barometric pressure, press the [mode]
button to exit the setting and return to Barometric Pressure
Graph Display.

- If no button is pressed in the setting display for about 3
minutes, the K2-100 will return to the Barometric Pressure
Graph Display.

6.4 Barometer Mode - Calibrate the Barometer

33 35

34 36

Barometric Pressure

Graph Display

adjust

button

flashing

dot

flashing

dot

48 Hour Memory Display
( the newest memory)

48 Hour Memory Display
(the oldest memory)

6.5 Barometer Mode - 48 Hour Memory

48 Hour Memory

- The K2-100 has a built-in memory function: the 48

Hour Memory.

- 48 Hour Memory records the Barometric Pressure for
every one hour of the last 48 hours.

- These memories can be reviewed in the 48 Hour Memory
Display.

Review the 48 Hour Memory

- Press the [adjust] button to select the 48 Hour Memory
Display in the Barometric Pressure Graph Display.

- The 'BAROMETER 48 HR MEM' will slide out and display
for 3 seconds, the 'MEM' indicator will be shown also.

- The Barometric Pressure 48 hour history graph shows
on the 1st row of the display.

- The pressure memory and temperature show on
the 2nd row of the display.

- The time which recorded the memory shows on the 3rd
row of the display.

- Press the [lap/reset] button to view the memory through
backward scrolling (from -1 to -48 hour), press the
[start/stop] button to view the memory through forward
scrolling ( from -48 to -1 hour).

NOTE:

- The memory columns on the left hand side of the
history graph are recorded earlier than those on the right.

start/stop lap/reset

To view the memory

by forward scrolling
(from -48 to -1 )hour

To view the memory

by backward scrolling

(from -1 to -48 hour)

lap/reset

button

mode

button

Barometric Pressure

Graph Display

adjust
button

6.6 Barometer Mode - Ascending / Descending Rate of the 48 Hour Memory

Ascending and Descending Rate

- The K2-100 a has built-in a function for calculating the
ascending and descending rate of the Barometric
Pressure of the last 48 hours.

- These figures can be reviewed in the Ascending Rate
Display and the Descending Rate Display.

Review the Ascending and Descending Rate

- Press the [adjust] button three times to select the
Ascending / Descending Rate Display in the Barometric
Pressure Graph Display.

- While the Ascending / Descending Rate Display is shown,
the Barometric Pressure Ascending or Descending Rate
shows on the 1st row of the display.

- A (+) value implies ascending rate; a (-) value implies a
descending rate.

- The pressure memory and the temperature sho w on the
2nd row of the display.

- The time which this memory was recorded shows on the
3rd row of the display.

- Press the [lap/reset] button to view the memory by
backward scrolling ( from -1 to 48 hour), press the
[start/stop] button to view the memory through forward
scrolling (from -48 to -1 hour).

- While these displays are shown, press the [mode] button
to exit the reviewing and the display will return
to the Barometric Pressure Graph Display.

lap/reset

To view the memory

by forward scrolling
(from -48 to -1 )hour

To view the memory

by backward scrolling

(from -1 to -48 hour)

mode

button

adjust
button

adjust
button

start/stop

ascending or

descending rate

Ascending / Descending

Rate Display

Implication of the Pressure History Graph

- In general, a rise trend in the Pressure History Graph
may forecast good weat

her ahead.

- A steady trend in the Pressure History Graph has the
possibility to have steady weather ahead.

- A falling trend in the Pressure History Graph may
predict bad weather ahead.

IMPORTANT: To get an

accurate result of the weat

her
forecast, the user has to stay at the same altitude for over
48 hours.

Rise Trend

Steady Trend

Fall Trend

Pressure History Graph

6.3 Barometer Mode - Implication of the Barometric Pressure History Graph

32

33

34

35

GB

GB

GB

36

37

38

37 39

38 40

Timer Mode

- 1 second resolution

Count Down Timer

- Quick set function (3, 5, 10, 15 and 45 minutes)

- One user-define timer up to 23 hours 59 minutes 59

seconds

Operation Mode

- Countdown or repeat mode

Timer Sounds

- Beep at last 5 seconds and

sounds for 2 seconds when count to zero

Altimeter Mode

- 1m or 3.28ft resolution

Measuring range

- -702m to 9164m or -2303ft to 30065ft (Assume sea level

is 1013.21 hPa/mbar and 0m)

Display range

- -9164m to 9164m or

Accuracy

- +/-50m or +/-164ft (Over temperature range -10.0 C to

60.0 C or 14.0 F to 140.0 F)

-30065ft to 30065ft (Depends on the

altitude reference setting)

Real Time Mode

- Hour, minute, second, am, pm, month, day, day of week
or barometer pressure tendency display (Selectable
between day of week)

Time System

- 12-hour or 24-hour format

Calendar System

- Auto-Calendar pre-programmed from the year 2000 to
2099

Alarm Mode

- 1 minute resolution

- 1 daily alarm and 1 date alarm

- Hourly chime

Alarm Sounds

- Sounds for 20 seconds at preset time of real time clock

Chronograph Mode

- 1/100 second resolution

Measuring Range

- 23 hours 59 minutes 59.99 seconds

Measuring Mode

- 10 lap memories

- Recall lap memories and total time

7.0 Specifications

Altitude Reference Setting

- -9164m to 9164m or -30065ft to 30065ft

Influence

- Minimum influence of temperature change on altitude

Conversion

- ICAO/ISA (Pressure to Altitude conversion)

Sampling Interval

- First 3 minutes: 1 second; after 3 minutes: 1 minute

Barometer Mode

- 0.1 hPa/mbar or 0.01 inHg resolution

Measuring range

- 300.0 hPa/mbar to 1100.0 hPa/mbar or 8.84 inHg to 32.44
inHg

Display range

- Same as measuring range

Pressure Tendency Setting

- 0.01 hPa/mbar resolution

- 0.00 hPa/mbar to 99.99 hPa/mbar

Compensation

- Temperature compensation

7.0 Specifications ... continue

Sampling Interval

- First 3 minutes: 1 second; After 3 minutes: 1 minute

Thermometer

- 0.1 C or 0.18 F resolution

Measuring range

- -10.0 C to 60.0 C or 14.0 F to 140.0 F

Sampling Interval

- First 3 minutes: 1 second ; After 3 minutes: 1 minute

Backlight

- Electro-Luminescent (EL) backlight

Battery

- Single 3V lithium battery (CR2032)

Battery Life

- Approximately 1.5 year under the following conditions:

30 seconds alarm operation per day

5 seconds EL backlight operation per day

3 minutes sensor mode operation per day

Battery Low Detection

- Battery voltage< 2.4 V +/- 0.2

Accuracy

- +/- 1 C or +/-1.8 F (Over temperature range -10.0 C
to +60.0 C or 14.0 F to 140.0 F)