A&D Scale HT Series Calibration and Function Setting Procedures User Manual

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Calibration switch cover 
Calibration switch 
 
 
 
HT series Compact Scale 
Calibration and Function Setting Procedures 
 
Calibration 
When is Calibration Required? 
Calibration may be required when the HT series compact scale was initially installed or has been moved to 
another location. 
 
Calibration Using a Calibration Weight 
1.  Entering the calibration mode 
Remove the calibration switch cover located on the bottom of the scale. 
Press the [ON:OFF] switch to turn the scale on. 
Press the calibration switch while the scale is in the weighing mode.  
 
1Cal 
  will be displayed.   
 
2. Zero calibration 
Press the [RE-ZERO] key.  Cal0   will be displayed. 
Wait for the STABLE Indicator ({) to be displayed. Press the [RE-ZERO] key to perform zero 
calibration.  
 Calf   will be displayed after a few seconds. To calibrate span, go to step 3. 
To return to the weighing mode without performing span calibration, press the [UNITS] key. 
3. Span calibration 
When  Calf   is displayed, place the calibration weight on the center of the weighing pan. Wait for the 
STABLE indicator to be displayed. Press the [RE-ZERO] key to perform span calibration.   
 end   will be displayed and the scale will automatically return to the weighing mode. 
Note: For details about the calibration weight, see “Specifications”.  
 
Calibration by Gravity Compensation 
If the acceleration of gravity at your location is not 9.798 m/s2 and you do not have calibration weights, the 
scale can be calibrated by compensating for the acceleration of gravity. (See “The Value of Gravity at 
Various Locations”.) 
1.  Setting a new acceleration value 
When  Cal   is displayed, press the [UNITS] key.  9798  will be displayed.  
To change the value, press the [RE-ZEsRO] key to increment the blinking digit and press the [UNITS] 
key to move the blinking digit. 
2.  Storing the value into the memory 
While pressing the [UNITS] key, press and hold the [RE-ZERO] key and release the [UNITS] key.   
After 
1end ,  Cal   will be displayed. Turn the scale off to finish the procedure. 
1WMPD4002012 
Bottom of the scale  
						

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Specifications 
MODEL  HT-300 HT-3000 HT-500 HT-5000 
Capacity/Resolution  310 g x 0.1 g  3100 g x 1 g  510 g x 0.1 g 5100 g x 1 g 
Maximum tare  310 g  3100 g  510 g 5100 g 
Calibration weight 300g ± 0.01g 3000g ± 0.1g 500g ± 0.01g 5000g ± 0.1g 
 
 
The Value of Gravity at Various Locations 
Amsterdam 9.813 m/s2 
Athens 9.807 m/s2 
Auckland NZ  9.799 m/s2 
Bangkok 9.783 m/s2 
Birmingham 9.813 m/s2 
Brussels 9.811 m/s2 
Buenos Aires  9.797  m/s2 
Calcutta 9.788 m/s2 
Cape Town  9.796 m/s2 
Chicago 9.803 m/s2 
Copenhagen 9.815 m/s2 
Cyprus 9.797 m/s2 
Djakarta 9.781 m/s2 
Frankfurt 9.810 m/s2 
Glasgow 9.816 m/s2 Havana 9.788 m/s
2 
Helsinki 9.819 m/s2 
Kuwait 9.793 m/s2 
Lisbon 9.801 m/s2 
London (
Greenwich) 9.812 m/s2 
Los Angeles  9.796  m/s2 
Madrid 9.800 m/s2 
Manila 9.784 m/s2 
Melbourne 9.800 m/s2 
Mexico City  9.779 m/s2 
Milan 9.806 m/s2 
New York  9.802 m/s2 
Oslo 9.819 m/s2 
Ottawa 9.806 m/s2 
Paris 9.809 m/s2 Rio de Janeiro  9.788 m/s
2 
Rome 9.803 m/s2 
San Francisco  9.800 m/s2 
Singapore 9.781 m/s2 
Stockholm 9.818 m/s2 
Sydney 9.797 m/s2 
Taichung 9.789 m/s2 
Taiwan 9.788 m/s2 
Taipei 9.790 m/s2 
Tokyo 9.798 m/s2 
Vancouver, BC  9.809 m/s2 
Washington DC  9.801 m/s2 
Wellington NZ  9.803 m/s2 
Zurich 9.807 m/s2 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
						

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Units 
All the available units and the order they appear in the display are as follows: 
 
 
 
 
 
 
 
 
 
 
                                         Select either one of Taiwan tael or Hong Kong tael. 
                                       
 
The units to be used can be selected in the function setting mode. The displaying order of the selected units   
is the same as above, while skipping the units that are not selected. 
For detailed information about selecting units, see “Function Setting”. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Ounce (avoir)
Troy ounce
Tola
Pound ounce
Gram
Tael
g
ｔ
ozozt
lb oz
ｔｌ 
						

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Function Setting 
Selecting Units 
1.  While pressing the [UNITS] key, press the [ON:OFF] key to turn the scale on. 
1Unit  will be 
displayed. 
2.  Press the [RE-ZERO] key once. ゜
Unit g   will be displayed. 
3.  Each time the [RE-ZERO] key is pressed, the display switches between ゜Unit g  and ゜Unit g . 
Note:  The STABLE indicator in the upper left corner of the display indicates that the unit is selected and 
can be used for weighing. 
4.  Press the [UNITS] key to select a unit. Units are displayed in turn, as shown below: 
tola  t  → ounce (avoir)    oz   → troy ounce    ozt   → pound ounce    Ib oz   → Taiwan tael    tl   
→Hong Kong tael    tl . 
5.  Select a unit to be used and press the [RE-ZERO] key to display the STABLE indicator. 
6.  Press the [UNITS] key. 1
end   will be displayed blinking.   
Press the [RE-ZERO] key. The new setting will be stored and the display will stop blinking. After a 
second, the scale will automatically return to the weighing mode. 
 
 
Changing the Decimal Point Type / Changing the Filter 
1.  While pressing the [UNITS] key, press the [ON:OFF] key to turn the scale on. 1Unit  will be 
displayed. 
2.  Press the [UNITS] key. 1pnt .
   will be displayed. When the decimal point type is not to be changed. 
go to step 4. 
3.  Each time the [RE-ZERO] key is pressed, the display switches between  
pnt .  and  pnt ,
 . 
Select the decimal point type to be used. 
4.  Press the [UNITS] key. 
1fir 0   will be displayed. When the filter is not to be changed, go to step 6. 
5.  Each time the [RE-ZERO] key is pressed, the display switches between  fir 0  and  fir 1 . 
Select the filter to be used. 
Note: 1fir 0   has been set at the factory before shipping. 1fir 1   is a filter with different frequency 
characteristics. Select one appropriate to the operating environment. 
6.    Press the [UNITS] key. 1
end   will be displayed blinking.   
Press the [RE-ZERO] key. The new setting will be stored and the display will stop blinking. After a 
second, the scale will automatically return to the weighing mode.