Lutron Electronics HT-305 Operation Manual
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Lutron Electronics HT-305 Operation Manual

Humidity meter
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pocket type
HUMIDITY METER
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

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Summary of Contents for Lutron Electronics HT-305

  • Page 1 HUMIDITY METER 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.

  • Page 2: Table Of Contents

    TABLE OF CONTENTS 1. FEATURES.............. 1 2. SPECIFICATIONS............ 2 3. FRONT PANEL DESCRIPTION........5 3-1 Display..............5 3-2 Power Button............ 5 3-3 Hold Button............5 3-4 REC Button............5 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 &...

  • Page 3: Features

    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.

  • Page 4: Specifications

    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 : ℃ ℉ Dew point : ℃...
  • Page 5 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 to 50 to 122 ℃...

  • Page 6: Front Panel Description

    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 &...

  • Page 7: General Measuring Procedure

    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 "...

  • Page 8: Data Hold

    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.
  • Page 9 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.
  • Page 10 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.

  • Page 11: Battery Replacement

    After the function is determined, press the " Enter Button " ( 3-4, Fig. 1 ) to save the selection function into memory IC permanently. Press the " Esc Button " ( 3-3. Fig. 1 ) will revert to normal display screen. 7.

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