Lutron Electronics SP-82AC User manual

ALTITUDE METER
Model : SP-82AC
Your purchase of this
ALTITUDE METER
marks a ste
p
forward for
you into the field o
f
precision measurement.
Although this METER is
a complex and delicate
instrument, its durable
structure will allow
many years of use i
f
proper operating
techniques are
developed. Please read
the following
instructions carefully
and always keep this
manual within easy
reach.
OPERATION MANUAL

TABLE OF CONTENTS
1. FEATURES.................................................................
.
1
2. SPECIFICATIONS........................................................1
2-1 General Specifications ..........................................
.
1
2-2 Electrical Specification...........................................
.
2
3. FRONT PANEL DESCRIPTION......................................
.
3
3-1 Hold button.......................................................... 3
3-2 button ( Power button )...................................
3
3-3 REC button...........................................................3
3-4 LCD display...........................................................3
3-5 Wristlet................................................................
.
3
3-6 Compass............................................................. 3
3-7 Barometer sensor..................................................3
3-8 Battery Compartment / Cover............................... 3
3-9 Button operation label...........................................3
4. MEASURING PROCEDURES.........................................
.
4
4-1 Power on/off.........................................................4
4-2 LCD backlight on/off..............................................4
4-3 Function selection................................................. 4
4-4 Unit selection........................................................5
4-5 Barometric pressure measurement.........................5
4-6 Altitude measurement...........................................
.
7
4-7 Hold Function...................................................... 8
4-8 REC ( Record ) function .......................................9
4-9 Auto power off disable........................................ 9
5. BATTERY REPLACEMENT............................................
.
10

1. FEATURES
* 3 in 1 , Precision Altitude meter + Barometer and Compas.
* Build in precision baro sensor for the atomsphere value
and altitude measurement.
* Build in the compass.
* Tiny bone shape with lightweight and small size case
design are suitable for handling with one hand.
* Wristlet design provides extra protection to the
instrument especially for user one hand operation.
* Built- in microprocessor circuit assures excellent
performance and accuracy.
* Concise and compact buttons arrangement,
easy operation.
* Memorize the maximum and minimum value with recall.
* Hold function to freeze the current reading value.
2. SPECIFICATIONS
2-1 General Specifications
Display 8 mm LCD display
Measurement 1. Altitude
2. Barometer
3. Compass
Operating Max. 80% RH.
Humidity
Operating 0 to 50° C (32 to 122° F)
Temperature
Over Input Indication of "- - - - "
Display
1

Power Supply CR 2032 DC 3V battery
Power Approx. DC 5 mA
Consumption
Weight 160g (battery included)
Dimension HWD 120 x 45 x 20 mm (4.7 x 1.8 x 1.2 inch).
Standard Instruction Manual
Accessory
2-2 Electrical Specification ( 23 ±5 )℃
Altitude
Unit Range Resolution Accuracy
m -2000 to 9000 m 1 m ± 15 m
ft -6000 to 30000 ft 1 ft ± 50 ft
Barometric pressure ( Barometer )
Unit Range Resolution Accuracy
hPa 10.0 to 999.9 0.1 hpa ± 1.5 hPa
1000 to 1100 1 hpa ± 2 hPa
mmHg 7.5 to 825.0 0.1 mmHg ± 1.2 mmHg
inHg 0.29 to 32.48 0.01 inHg ± 0.05 inHg
2

3. FRONT PANEL DESCRIPTION
Fig. 1
3-1 Hold button
3-2 Button ( Power button )
3-3 REC nutton
3-4 LCD display
3-5 Wristlet
3-6 Compass
3-7 Barometer sensor
3-8 Battery Compartment / Cover
3-9 Button operation label
3

4. MEASURING PROCEDURE
4-1 Power on/off
Button = Power Button
1) Power on :
Press " Power Button " once.
2) Power off :
During power on, press " Power Button " > 3 seconds.
will power off.
4-2 LCD backlight on/off
During power on, press " Power Button " once, then the
LCD backlight will be on 5 seconds then off automatically,
4-3 Function selection
The meter can select 3 kind function as :
a.Barometric pressure
b.Altitude
During power on, press the " Hold button "
continuously ( not release the button ), the Display will
show the following text in sequence :
Display Function
text
bAr Barometric pressure
HigH Altitude
4

Until the Display show the desired function, just
release the " Hold button " , the meter will execute this
function with default.
Remark :
When power off and on again, the meter
will default to " Altitude " function automatically.
4-4 Unit selection
During power on, press the " REC button "
continuously > 3 seconds, the Display will show the text
" Unit " release the " REC button ", then press " button "
to select the desired unit, after the desired unit
is sleeted, press the " REC button " to save the unit
with default.
REC button = Enter button
The selection unit for all function are :
Measurement Unit
Barometric pressure hPa, mmHg, inHg
* HPA = hpa, mHg = mmHg
Altitude m, Ft
4-5 The barometric pressure measurement
1)Actual air pressure ( abosolute air pressure ) in the
measurement location :
Power on, select the function to " Barometric pressure
measurement " ( refer to chapter 4-3, Display will show
bAr text once awhile at first ), now the meter is ready for
the actual air pressure in the measurement location (
absolute air pressure value ).
5

Remark :
Actual air pressure in the measurement location changes
in response with two things :
changes in altitude and changes in atmosphere.
2)Sea level barometric pressure value measurement
Not move the location, if intend to see the sea level
barometric pressure value, the procedures are :
Press the " Hold button " once, the Display will show the
indicator " HOLD " then press the " REC button "
continuously until the left down bottom of Display show
" m " or " Ft "
m = meter F = feet
Use the " Hold button " and the " button "
adjust the location altitude vale exactly..
Until the location altitude value is set, press
" REC button " will show the sea level barometric pressure
value.
button = button,▲
Hold button = button▼
REC button = Enter button
Remark :
After power off and on again, if select the " Barometric
pressure " function again, the meter will show actual
air pressure in the measurement location ( absolute air
pressure value ) not the sea level barometric pressure value.
6

4-6 Altitude measurement
Altitude measurement principal :
The higher altitude location will get less barometric
pressure value that compare with the sea level.
If intend to measure your altitude value precisely,
a.Method 1 : It should set the altitude value of your
start location is known at the first.
or b. Method 2 : It should reset the sea level barometric
pressure value at the first.
1)Method 1
To set the altitude value of your start
location is known at the first.
a.Power on the meter and under the altitude function,
press the " Hold button " once, the Display will
show the indicator " HOLD " then press the " REC
button " once, the left down bottom of Display
show " m ( or Ft ) " indicator with flashing.
Use the " Hold button " and the " button "
adjust the location altitude value. Until the desired
start location altitude value is set, press " REC
button " to save the setting value with default.
button = button▲
Hold button = button▼
REC button = Enter button
Remark :
You can obtain your altitude value from a
topographical map or local landmark. Goggle Earth is
an excellent free program the provides the exact
altitude for given address : www.earth.google.com.
The other you also can get the reference altitude
value from the reading of GPS system.
7

2)Method 2
To reset the current sea level barometric
pressure value is known at the first.
a.Power on the meter and under the altitude function,
press the " Hold button " once, the Display will
show the indicator " HOLD " then press the " REC
button " > 3 seconds and continuously until the left
down bottom of Display show " HTP " indicator
with flashing then release the " REC button ".
Use the " Hold button " and the " button "
adjust the current sea level barometric pressure value.
Until the desired sea level barometric pressure value
is set, press " REC button " to save the setting value
with default.
button = button▲
Hold button = button▼
REC button = Enter button
Remark :
You can obtain your current sea level barometric
pressure value by checking an interrnet weather
site for a nearby location or contacting a local
airport.
4-7 Hold Function
Whenever press the " Hold Button " will freeze the current
reading value with a "HOLD" symbol on the display.
To release the Hold function, just press the " Hold button "
once again, the " HOLD " indicator will be disappeared.
8