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©2003 DELMHORST INSTRUMENT CO. 

 

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INTRODUCTION: 

 
The model HT-3000 is a portable, battery-powered meter for the measurement of 
ambient temperature, relative humidity, and through calculation, dewpoint and 
absolute humidity (grains per pound). The display can be read in either degrees 
Fahrenheit (

°

F) or degrees Celsius (

°

C).  

 

OPERATION: 

 
1.  Install the battery in the compartment located on the underside of the instrument 

case handle.  

 
2.  Press and hold the ON/OFF button until the display activates. The meter is now 

ON. The current software version will flash on the screen and then the meter 
automatically enters its default mode: measured Temperature (

°

F) and Relative 

Humidity (%) will appear on the display. T and RH readings are updated at a five 
second interval. 
 

3.  Tap the ROTATE button to alternate between the display of T and RH and the 

calculated values of Dewpoint and Absolute Humidity. A full set of all four values 
is always in the meter memory after power up. This allows immediate access to 
any measured or calculated value, even if the data of interest is not currently 
displayed. 

 
4.  Press the SCALE (F/C) button at any time to switch Temperature and Dewpoint 

readings between Fahrenheit and Celsius.  

 
5.  Press the HOLD button to freeze the displayed readings. The letter H appears at 

the right of the first display line. The meter stops collecting additional readings, 
but the SCALE and ROTATE functions are still available. Press the HOLD button 
again to return the meter to normal operation. 

 
6.  Press and hold the ON/OFF button to turn the meter OFF. The meter must be in 

normal operating mode and not in HOLD mode to turn it off.  

 

AUTO-OFF: 
 

The meter automatically switches OFF after 10 minutes without any button activity 
and as long as the meter is not in HOLD mode. If the backlight is active, the auto-off 
time is 35 seconds. (see below) 
 

BACKLIGHT: 

 
The meter is equipped with a display backlight, allowing use under poor lighting 
conditions. Continued use of the backlight presents an extra drain on the battery and 
significantly reduces expected battery life. 
 

Содержание HT-3000

Страница 1: ...LE OF CONTENTS 3 INTRODUCTION 3 OPERATION 3 AUTO OFF 3 BACKLIGHT 4 LOW BATTERY 4 ADJUSTING THE DISPLAY CONTRAST 4 OPERATION SUMMARY 5 CALIBRATION MAINTENANCE 5 TECHNICAL SPECIFICATION Measurement Accuracy Response Time Resolution Power Supply Battery Life 6 CARE OF YOUR METER 6 SERVICE FOR YOUR METER 7 WARRANTY ...

Страница 2: ... 2003 DELMHORST INSTRUMENT CO 2 of 2 SCALE ROTATE HOLD ON OFF ...

Страница 3: ...the meter memory after power up This allows immediate access to any measured or calculated value even if the data of interest is not currently displayed 4 Press the SCALE F C button at any time to switch Temperature and Dewpoint readings between Fahrenheit and Celsius 5 Press the HOLD button to freeze the displayed readings The letter H appears at the right of the first display line The meter stop...

Страница 4: ... mode Press and hold the ON OFF button Keep it pressed throughout the adjustment process 2 To turn the display darker press and hold the SCALE F C button within 2 seconds Release this button when desired contrast is achieved 3 To turn the display lighter press and hold the ROTATE button within 2 seconds Release the button when the desired contrast is achieved 4 Once the desired contrast is achieve...

Страница 5: ...ibration is not available for the HT 3000 TECHNICAL SPECIFICATIONS Measurement Temperature 20 C to 70 C 4 F to 158 F Relative Humidity 0 100 RH Dew Point 40 C to 80 C 40 F to 176 F Absolute Humidity 0 55 gpp to 3868 gpp Accuracy Temperature 1 C over 0 C 70 C 1 8 F over 32 F to 158 F Relative Humidity 3 Response time Temperature reaches 80 of full excursion in approx 75 seconds Relative Humidity re...

Страница 6: ...ructions prior to returning a meter Include your name address daytime phone and fax numbers or e mail address If you believe the meter is under warranty please provide the original sales slip or invoice Ship via UPS Express Mail Priority Mail or any overnight courier who provides prompt service Do not use standard parcel post Insure your instrument for its full value and ship prepaid We are not re...

Страница 7: ...duct or its calibration With proper care and maintenance the meter should stay in calibration follow the instructions in the Care of Your Meter section Under no circumstances shall Delmhorst be liable for any incidental indirect special or consequential damages of any type whatsoever including but not limited to lost profits or downtime arising out of or related in any respect to its meters or ele...

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