General Tools DA833 User Manual
Altimeter / Barometer
Weather Forecasts and Clock / Calendar
TABLE OF CONTENTS
INTRODUCTION --------------------------------------------- 2
DESCRIPTION OF PARTS ---------------------------- 2
INSTALLING AND REPLACING BATTERIES -- 3
GENERAL OPERATION OF THE ALTIMETER 4
• Altitude Calibration ----------------------------------------- 6
• Units of Measurement for Altitude ---------------------- 6
• About The Altitude Change Graph ---------------------- 6
• Altitude History Display ----------------------------------- 7
• About Altitude Change Memory ------------------------- 7
• Clearing Altitude Memory, Max / Min Altitude
Memory, and Vertical Ascent / Decent Memory ----- 7
• The Altitude Alarm ------------------------------------------ 8
• Altitude Sampling Rate ------------------------------------- 8
• Notes On Altimeter Functions ---------------------------- 9
GENERAL OPERATION OF BAROMETER
AND WEATHER FORECAST FUNCTIONS ------- 9
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with
Model: DA833
User’s Manual
• Barometric Calibrations ------------------------------------ 10
• Units of Measure for Barometric Pressure ------------- 10
• About The Pressure Change Graph ---------------------- 11
• Pressure History Display ----------------------------------- 11
• Notes On Barometer Functions --------------------------- 11
GENERAL OPERATION OF TIMR AND
DATE FUNCTIONS --------------------------------------- 11
• The Time and Date ------------------------------------------- 12
• The Daily Alarm ---------------------------------------------- 13
• Deactivating The Alarm ------------------------------------- 14
• The Count-Up Timer ----------------------------------------- 14
• Temperature Display ----------------------------------------- 1 4
RESETTING THE UNIT --------------------------------- 14
MAINTENANCE ---------------------------------------------- 15
SPECIFICATIONS -------------------------------------------- 15
1
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INTRODUCTION
Thank you for your purchase of the Altimeter / Barometer .
Designed to be durable, this unit is constructed for rugged outdoor
use.
The DA833 has three primary functions.
1. An Altimeter
- Functions related to altitude measurement.
2. A Barometer and Weather Forecast Device
- Functions related to weather forecasts and atmospheric
pressure.
3. Clock, Current Date Calendar, and Count-Up Timer
- Functions related to time, date, and time measurement.
An altimeter, the DA833 will measure and display current altitude
readings, changes between two elevations, and maximum and
minimum altitudes. The unit stores altitude data and can indicate
changes in altitude for a 12-hour period or calculates the total
accumulation of elevation ascents over a given period of time. In
addition, the user can set an altitude alarm that will activate when
specified elevations are reached.
The DA833 is also a barometer. It measures and displays current
pressure readings, and provides a barometric history and a bar
graph showing barometric changes over a 12-hour period.
A weather forecast device, the DA833 uses barometric information
to make forecasts as sunny, slightly cloudy, cloudy, and rainy. It
also has a built-in thermometer.
As a timepiece, this unit functions as a clock / calendar, daily
alarm, and count-up timer.
To optimize the usefulness of this device, be sure to read this
instruction manual carefully before use, and keep it handy for
future reference.
DESCRIPTION OF PARTS
Liquid Crystal Display (LCD)
- Large easy-to-read 3-line LCD
[ALT] Altimeter Button
- Alternates between Altimeter displays
[BARO] Barometer Button
- Alternates between Barometric displays
2
TIME Button
- Alternates between Time displays
[+ -] Button
- Changes the value of a setting
- Clears memories
- Activates / deactivates alarm
- Selects units of measure
- Switches from fast to slow sampling rate
Battery Compartment
- Houses 2 (two) CR-2032 batteries
- RESET Button
Sensor Vents
- Openings for atmospheric sensitive sensors
Neck Cord
- Facilitates carrying around the neck or attached to
a rucksack or belt
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Hand Grips
- Rubberized grips that prevent the unit from being
accidentally dropped
Wall-Mount Bracket
- to mount unit to wall or vertical surfice
INSTALLING AND REPLACING OF
BATTERY
The DA833 operates with 2 (two) CR-2032 Lithium batteries that
are included with all new units. During initial packaging, the
batteries were insulated with a red tape so as to maximize the shelf
life of the product. Before use, remove the insulation tape by
gently pulling.
Upon removal, the display will show a full-segment display for 3
seconds; it will then enter the Normal Altitude Display.
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FULL SEGMENT DISPLAY
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Follow these steps to install or replace batteries:
1. Open battery cover located at the back of the unit by removing
screws.
2. Insert 2 (two) new CR-2032 Lithium batteries.
3. Replace the battery cover.
A battery-low indicate [
BATT
] will show on the display when the
batteries require changing.
It is recommended that when the user is stationary at one elevation,
that the unit is placed in Barometer Mode. The Altimeter Mode
may shorten battery life. Stored altitude related data is not affected
by having the unit in Barometer Mode for extended periods of
time.
Note: Disposed of improperly, batteries can be harmful.
Protect the environment by taking exhausted batteries to
authorized disposal stations.
GENERAL OPERATION OF THE
ALTIMETER
In Altimeter Mode, by detecting changes in air pressure, the
DA833 determines a given altitude level. Subsequently, the unit
can be set to show changes in altitude and maximum / minimum
elevations. It can store altitude-related data and display elevation
trends over a 12-hour period of time. The unit can also display the
net total of accumulative ascents.
A small
and that the displays are altitude related.
To view display sequences in Altimeter Mode:
1. Press [ALT] to move between various Altimeter Mode displays.
Normal Altitude Display
The first display in Altimeter Mode.
Note: If the unit is being used for the first time, it will
automatically enter the Normal Altimeter Display.
Display shows:
Altitude
icon
Altitude
trend
graph
icon indicates that the unit is in Altimeter Mode
Current Altitude
Current Time
Current Temperature
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NORMAL ALTITUDE DISPLAY
2. Press [ALT] to view the Altitude Max Memory Display.
Display shows:
Altitude change indicator
Change in altitude
4. Press [ALT] again, Altitude History Display.
Display show:
Current altitude
Corresponding altitude level
at the indicated time
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Maximum
altitude
reached
ALTITUDE MAX MEMORY DISPLAY
Accumulative vertical
ascent icon
The accumulative vertical
ascent memory
3. Press [ALT] again, to view the Altitude Min Memory Display.
Display shows:
Change in altitude
Minimum altitude
reached
ALTITUDE MIN MEMORY DISPLAY
Accumulative
vertical decent icon
Accumulative
vertical decent
memory
One hour previous*
ALTITUDE HISTORY DISPLAY
* Previous altitude levels can be displayed for up to 12-
hours. Press [+] or [-] to display previous altitude levels
at one-hour intervals for the past 12-hours.
5. Press [ALT] again to view the Altitude Alarm Display.
Display shows:
Alarm display indicator
Altitude level where the
alarm will activate
Current Time
ALTITUDE ALARM DISPLAY
Current Temperature
5
Alarm On/Off Indicator
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