Lutron Electronics HT-305 Bedienungsanleitung

pocket type

HUMIDITY METE

Model : HT-305

Your purchase of this HUMIDITY 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

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

3. FRONT PANEL DESCRIPTION...................................5

3-1 Display.............................................................

3-2 Power Button....................................................5

3-3 Hold Button......................................................

3-4 REC Button.......................................................

3-5 Function Button.................................................5

3-6 Battery Compartment/Cover...............................5

3-7 Probe Input Socket ...........................................5

3-8 Probe Plug .......................................................5

3-9 Probe handle.....................................................5

3-10 Probe head ( Humidity & Temperature )..............5

4. GENERAL MEASURING PROCEDURE...........................6

4-1 Humidity and Temperature measurement.............

4-2 Dew point measurement......................................6

4-3 Data Hold...........................................................

4-4 Data Record (Max, Min reading)........................... 7

5. BATTERY REPLACEMENT...........................................12

1. FEATURES

*Humidity + Temperature + Dew point are combined

into one meter, intelligent and professional.

*0.1 %RH resolution for the humidity reading,

0.1 degree resolution for the Temp. reading.

*Wide humidity & temp. measuring range.

*Pocket size with Separate humidity & temp. probe,

easy operation. & remote measurement.

*Fast humidity measuring response time.

*High accuracy and high precision.

*Dew point measurement.

*Just few panel buttons, easy operation.

*Microprocessor circuit assures maximum possible

accuracy, provides special functions and features.

*LCD with two display, easy readout.

*Show the humidity & temperature values on the

LCD display at same time.

*Heavy duty & compact housing case, designed

for easy carry out & operation.

*Records Maximum and Minimum readings with Recall.

*Auto shut off saves battery life.

*Data hold function for freezing the desired value

on display.

*Built-in low battery indicator.

2. SPECIFICATIONS

2-1 General Specifications

Circuit Custom one-chip of microprocessor LSI

circuit.

Display LCD size : 44 mm x 29 mm

dual function LCD display.

Measurement Humidity : %RH ( Relative Humidity )

Unit Temperature : or .℃℉

Dew point : or .℃℉

Response Time 5 to 30 seconds typically.

@ Reach the 85% reading value

Temperature Automatic temp. compensation for the

Compensation humidity function.

Data Hold Freeze the display reading.

Memory Recall Maximum & Minimum value.

Sampling Time Approx. 0.8 second.

Power off Auto shut off saves battery life.

Operating 0 to 50 .℃

Temperature

Operating Main instrument : Less than 85% R.H.

Humidity Probe : 0 to 95 %RH.

Power Supply 006P DC 9V battery

( Alkaline or Heavy duty type ).

Power Current Approx. DC 4.6 mA.

Weight 264 g/0.67 LB.

@ Battery is included.

Dimension

Main instrument :

135x60x33 mm, ( 5.3x2.4x1.3 inch ).

Humidity Sensor Probe :

197 mm ( 7.8 inch ) in length.

Accessories Instruction manual.....................

1 PC

Included Humidity probe...........................1 PC

2-2 Electrical Specifications (23±5 )℃

Humidity/ Temperature

Range 10 % to 95 % R.H.

Humidity Resolution 0.1 % R.H.

Accuracy 70% RH≧± (3% reading + 1% RH).

< 70% RH

±3%RH.

Range 0 to 50 ,32 to 122 .℃℃℉ ℉

Temperature Resolution 0.1 degree

Accuracy - 0.8 .℃℃

- 1.5 .℉℉

Dew Point

℃Range -25.3 to 48.9℃℃

Resolution 0.1 ℃

℉Range -13.5 to 120.1 .℉℉

Resolution 0.1 .℉

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..

@ Above specification tests under the environment RF Field

Strength less than 3 V/M & frequency less than 30 MHz only.

3. FRONT PANEL DESCRIPTION

Fig. 1

3-1 Display

3-2 Power Button

3-3 Hold Button ( ESC Button )

3-4 REC Button ( Enter Button )

3-5 Function Button

3-6 Battery Compartment/Cover

3-7 Probe Input Socket

3-8 Probe Plug

3-9 Probe handle

3-10 Probe head

( Humidity & Temperature )

3-11 Set Button

4. GENERAL MEASURING

PROCEDURE

The meter default value are :

*The temperature reading unit is .℃

*The power management is set to auto power

off.

4-1 Humidity and Temperature measurement

1)Plug the " Probe Plug " ( 3-8, Fig. 1 ) into the " Probe

Input Socket " ( 3-7, Fig. 1 ).

2)Power on the meter by pressing the " Power Button "

( 3-2, Fig. 1 ), the LCD shows the unit " %RH " & " "℃

at the same time and measured value will show on

the display ( upper display is Humidity value, the

lower display is the temperature value ) .

3)The meter Temp. display unit is defaulted to " ". If℃

intend to let the meter's temperature unit default to " "℉

, then please refer section 5-1 ( page 9 ).

4-2 Dew point measurement

The procedures of " Dew point measurement " are same

as the above " 4-1 Humidity and Temperature

measurement " except select the " Dew point " function

by pressing the " Function Button " ( 3-5, Fig. 1 ) once,

the LCD will show the unit " DEW " & " ( or ).℃℉

The upper display show the Dew point value, the lower

display show the temperature value.

4-3 Data Hold

During the measurement, press the " Hold Button " ( 3-3,

Fig. 1 ) once will hold the measured value & the LCD will

display a " HOLD " symbol.

* Press the " Hold Button " once again will release the data

hold function.

4-4 Data Record ( Max., Min. reading )

* The data record function records the maximum and

minimum readings. Press the " REC Button " ( 3-4, Fig.

1 ) once to start the Data Record function and there

will be a " REC. " symbol on the display.

* With the " REC. " symbol on the display :

a)Press the " REC Button " ( 3-4, Fig. 1 ) once, the

" REC. MAX. " symbol along with the maximum value

will appear on the display.

If intend to delete the maximum value, just press

the " Hold Button " ( 3-3, Fig. 1 ) once, then the

display will show the " REC. " symbol only & execute

the memory function continuously.

b)Press the " REC Button " ( 3-4, Fig. 1 ) again, the

" REC. MIN. " symbol along with the minimum value

will appear on the display.

If intend to delete the minimum value, just press

the " Hold Button " ( 3-3, Fig. 1 ) once, then

the display will show the " REC. " symbol only &

execute the memory function continuously.

c)To exit the memory record function, just press the

" REC " button for 2 seconds at least. The display will

revert to the current reading.

5. ADVANCED MEASURING

PROCEDURE

When execute the following Advanced

Measuring Procedure should cancel the " Hold

function " and the " Record function " first. The

display will not show the " HOLD " and the " REC "

marker.

a.Hold the " Set Button " ( 3-11, Fig. 1 ) at least two

seconds until the lower display show " COde ", then

release the " Set Button ", the upper display will show

" 1000 ".

*1000 is the password code that allow to execute the

Advanced Measuring Procedure following.

After display show " COde 1000 ", push the " Enter

Button " ( 3-4, Fig. 1 ) once will go to the following b.

procedures.

*If push the " ESC Button " ( 3-3, Fig. 1 ) will escape

the selecting function and return to the normal

measuring display.

b.One by one to press the " Set Button " ( 3-11, Fig. 1 )

once a while to select the two main function that show

on the lower display as :

.......℉Change the Temp , unit℃℉

OFF......

Auto power ON/OFF management

5-1 Change the Temp , unit℃℉

Use the " Set Button " ( 3-11, Fig. 1 ) to select the main

function to " ", then one by one to press the "℉

Function Button " ( 3-5, Fig. 1 ) a while will determine

the default Temp. unit to or℃℉

@Press the " Function Button ", if the upper display value

show " 0 ", the default Temp. unit is ℃

@Press the " Function Button ", if the upper display value

show " 1 ", the default Temp. unit is .℉

After the function is determined, press the " Enter Button "

( 3-4, Fig. 1 ) to confirm and save the selection data into

memory IC permanently. Press the " Esc Button " ( 3-3.

Fig. 1 ) will revert to normal display screen.

5-2 Auto power ON/OFF

Use the " Set Button " ( 3-11, Fig. 1 ) to select the main

function to " OFF ", then one by one to press the "

Function Button " ( 3-5, Fig. 1 ) a while will determine

the default the power management system is Auto

Power Off enable or disable.

@Press the " Function Button " once, if the upper display

value show " 0 ", it is not Auto Power Off management

( disable ).

@Press the " Function Button " once, if the upper display

value show " 1 ", it is the Auto Power Off management

( enable ).

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