Lutron Electronics PHB-318 User manual

HUMIDITY/TEMP.
BAROMETE
R
Model : PHB-318
Your purchase of this
METER marks a step
forward for you into the
field of 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......................................................
.
2
2-1 General Specifications..........................................2
2-2 Electrical Specifications........................................3
3.FRONT PANEL DESCRIPTION..................................... 5
3-1 Probe Head.........................................................5
3-2 Humidity/Temp. Sensor.......................................
.
5
3-3 Power ( ) Button.............................................▲5
3-4 Hold ( ) Button, Unit Button.........................
5
3-5 REC ( ) Button, Mode Button............................▼5
3-6 LCD Display........................................................
.
5
3-7 Battery Compartment/Cover.................................5
4.MEASURING PROCEDURE.......................................... 6
4-1 Mode ( Function ) selection..................................6
4-2 Unit selection...................................................... 7
4-3 Humidity measurement........................................9
4-4 Barometer measurement.....................................
.
9
4-5 Dew point measurement......................................9
4-6 Data Hold...........................................................
.
9
4-7 Data Record ( Max., Min. reading ).......................10
4-8 Auto power off management................................11
5.BATTERY REPLACEMENT...........................................
.
11
6.OPTIONAL CARRYING CASE.......................................11

1. FEATURES
* Barometer, Humidity, Temperature meter, three in
one, professional.
* Barometer unit : hPa, mmHg, inHg.
* Humidity with Dew point measurement
* Temperature measurement with , unit.℃℉
* Fast response time for humidity measurement.
* Atmosphere measurement with high accuracy.
* Two display can select the four mode ( function ) :
Humidity/Temp., Humidity/Dew point,
Barometer/Temp., Barometer/Humidity.
* Bright LCD display.
* Microprocessor circuit ensures high accuracy and
provides special functions and features.
* Records Maximum and Minimum readings with recall.
* Auto power off saves battery life.
* Operates from DC 1.5V ( UM4/AAA ) x 4 PCs batteries.
* Durable, long-lasting components, enclosed in strong,
compact ABS-plastic housing.
1

2. SPECIFICATIONS
2-1 General Specifications
Display LCD size : 28 mm x 19 mm.
Temp. unit ,℃℉
Barometer unit
:
hPa, mmHg, inHg.
Humidity unit %RH
Dew point ,℃℉
Circuit Custom one-chip of microprocessor LSI
circuit.
Sensor Barometer Semiconductor
Structure Humidity Capacitance humidity
sensor, semiconductor
Temperature Semiconductor
Data Hold Freeze the display reading.
Memory Recall Maximum & Minimum value.
Sampling Time Approx. 1 second.
Power off Auto shut off saves battery life or
manual off ( REC function ).
Operating 0 to 50 .℃
Temperature
Operating Less than 80% R.H.
Humidity
Power Supply DC 1.5 V battery ( UM4/AAA ) x 4 PCs,
Power Current Approx. DC 3.0 mA
Weight 157 g/ 0.35 LB. @ Battery is included.
Dimension 210 x 40 x 40 mm (8.3" x 1.6" x 1.6")
Accessories Instruction manual.....................
.
1 PC
Included
Optional Soft carrying case with sash
Accessory ( 210 x 80 x 50 mm ), Model : CA-52A
2

2-2 Electrical Specifications (23±5 )℃
Humidity / Dew point
a. Humidity
Range 10 % to 95 % R.H.
Resolution 0.1 % R.H.
Accuracy 70% RH≧± (3% reading + 1% RH).
< 70% RH - 3% RH.
±3%RH.
b. Dew point
℃Range -25.3 to 48.9℃℃
Resolution 0.01 ℃
℉Range -13.5 to 120.1 .℉℉
Resolution 0.01 .℉
Remark :
*
Dew Point display value is calculated from the
Humidity/Temp. measurement automatically.
*
The Dew Point accuracy is sum accuracy value of
Humidity & Temperature measurement..
Barometer
Measurement Range Resolution Accuracy @ reading
hPa 10.0 to 999.9 0.1 ± 1.5 hPa
1000 to 1100 1 ± 2 hPa
mmHg 7.5 to 825.0 0.1 ± 1.2 mmHg
inHg. 0.29 to 32.48 0.01 ± 0.05 inHg
3

Temperature
Measuring Range 0 to 50 /32 to 122℃℃℉ ℉
Resolution 0.1 /0.1℃℉
Accuracy ± 0.8 /1.5℃℉
*
Above specification tests under the environment RF Field Stren
g
th less than
3
V
/M & frequency less than 30 MHz only.
4

3. FRONT PANEL DESCRIPTION
Fig. 1
3-1 Probe head
3-2 Humidity/Temp. Sensor
3-3 Power ( ) Button▲
3-4 Hold ( ) Button, Unit Button
3-5 REC ( ) Button, Mode Button▼
3-6 LCD Display
3-7 Battery Compartment/Cover
5

4. MEASURING PROCEDURE
4-1 Mode ( Function ) selection
1)Turn on the meter by pressing the " Power Button "
( 3-3, Fig. 1 ) momentarily.
* Pressing the " Power Button " ( 3-3, Fig. 1 )
momentarily again will turn off the meter.
2)The meter can select four kind mode ( function ) as :
a.Humidity/Temp.
b.Humidity/Dew point
c.Barometer/Temp.
d.Barometer/Humidity
Pressing the " Mode Button " ( 3-5, Fig. 1 )
continuously at least 2 seconds, both upper and the
lower display value will be flashed, use the " ▲
Button " ( 3-3, Fig. 1 ) or " Button " ( 3-5, Fig. 1 )▼
to select the one kind mode ( function ) of above
a, b, c, d, then press " Button " ( 3-4,
Fig. 1 ) to entry the selecting mode.
6

%RH
60.9 Value Flashing
Value Flashing 25.9 ℃
* After the mode ( function ) is selected, it will be
memorized into the memory circuit .
If power off and on again will present the
existing selection mode ( function ).
4-2 Unit selection
1)Turn on the meter by pressing the " Power Button "
( 3-3, Fig. 1 ) momentarily.
* Pressing the " Power Button " ( 3-3, Fig. 1 )
momentarily again will turn off the meter.
2)Pressing the " Unit Button " ( 3-4, Fig. 1 )
continuously at least 2 seconds, both upper and the
lower unit will be flashed, use the " Button " ( 3-3,▲
Fig. 1 ) to select the upper display's unit, use the " ▼
Button " ( 3-5, Fig. 1 ) to select the lower display's
unit, then press " Button " ( 3-4, Fig. 1 )
to entry the selecting unit.
7

Unit Flashing %RH
60.9
25.9 ℃Unit Flashing
The measuring unit for different mode
( function ) are :
Temp. unit ,℃℉
Barometer unit hPa, mmHg, inHg.
Humidity unit %RH
Dew point ,℃℉
* After the unit is selected, it will be memorized into
the memory circuit. If power off and on again will
present the existing selection unit.
4-3 Humidity measurement
1)Turn on the meter by pressing the " Power Button "
( 3-3, Fig. 1 ) momentarily.
2)For the above 4-1 mode ( function ) selection, please
set to :
a.Humidity/Temp.
( Upper display show humidity value , lower
display show Temp. value )
c.Barometer/Humidity
( Upper display show atmosphere value , lower
display show humidity value )
8

4-4 Barometer measurement
1)Turn on the meter by pressing the " Power Button "
( 3-3, Fig. 1 ) momentarily.
2)For the above 4-1 mode ( function ) selection, please
set to :
c.Barometer/Temp.
( Upper display show atmosphere value , lower
display show Temp. value )
d.Barometer/Humidity
( Upper display show atmosphere value , lower
display show humidity value )
4-5 Dew point measurement
1)Turn on the meter by pressing the " Power Button "
( 3-3, Fig. 1 ) momentarily.
2)For the above 4-1 mode ( function ) selection, please
set to :
b.Humidity/Dew point
( Upper display show humidity value , lower
display show dew point value )
4-6 Data Hold
* During the measurement, press the " Hold Button "
( 3-4, Fig. 1 ) momentarily to hold the measured
value. The LCD will show a " HOLD " symbol.
* Press the" Hold Button " once again to release the
data hold function.
9

4-7 Data Record ( Max., Min. reading )
1)The data record function records the maximum and
minimum readings. Press the " REC Button " ( 3-5, Fig. 1 )
momentarily to start the Data Record function,
shows " REC " on the display.
2)With the " REC " symbol on the display.
a)Press the " REC Button " ( 3-5, Fig. 1 ) momentarily,
the " REC MAX " symbol along with the maximum
value will appear on the display.
b)Press the " REC Button " ( 3-5, Fig. 1 ) momentarily
again, the " REC MIN " symbol along with the
minimum value will appear on the display.
* When display shows " REC MAX " or " REC MIN ",
press the " Hold Button " ( 3-4, Fig. 1 )
momentarily will delete the max. ( min. ) value,
the display will show the " REC. " only and
execute the memory function continuously.
c)To exit the memory record function, press the
" REC " button for 2 seconds at least. The display will
revert to the current reading, not show " REC "
10

4-8 Auto power off management
1)The instrument has built-in "Auto Power Shut-off "
function in order to prolong battery life. The meter will
switch off automatically if none of the buttons are
pressed within 10 min..
2)To de-activate this feature, Select the memory record
function during measurement, by pressing the
" REC Button " ( 3-5, Fig. 1 ).
5. BATTERY REPLACEMENT
*Replace the batteries when the left corner of the LCD
displays the low battery icon " ", using 4 fresh
1.5 V ( UM4, AAA ) batteries.
*To change the batteries, open ( rotate clockwise direction )
the " Battery Cover " ( 3-7, Fig. 1 ).
*Make sure the " Battery cover " (3-7, Fig 1) is secured
after changing the batteries.
6. OPTIONAL CARRYING CASE
Soft carrying case with sash.
Size : 210 x 80 x 50 mm
Model : CA-52A
11 0612-PHB318