A&D Scale HT120 User Manual

 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1WMPD4002673 

 2
SAFETY PRECAUTIONS 
All safety messages are identified by the following, WA R N I N G or 
 CAUTION , of ANSI Z535.4  (American National Standard Institute: Product 
Safety Signs and Labels). The meanings are as follows: 
 
 
 
 
  

 3
Compliance with FCC rules   Please note that this equipment generates, uses and can radiate radio 
frequency energy. This equipment  has been tested and has been found to 
comply with the limits of a Class A computing device pursu ant to Subpart J 
of Part 15 of FCC rules. These rul es are designed to provide reasonable 
protection against interference when  the equipment is operated in a 
commercial environment. If this unit is  operated in a residential area it may 
cause some interference and under...

 4
 
 
 
 
 
 
 
 
 
 
 
 
 
  ON:OFF  key 
Turns the scale power on/off. 
 RE-ZERO  key Sets the display to zero. When  the weight is within ±2% 
of the weighing capacity to  the zero point at the 
power-on, the key will zero  the scale. When the weight 
exceeds +2%, it will be subtracted as tare weight. 
 MODE  key Changes the weighing units. 
STABLE indicator  Turns on when the weight reading is stable. 
NET indicator Turns on when the net weight is displayed. 
ZERO indicator  Turns on at the center...

 5
 
Note  The batteries provided with the scale are for testing the performance 
of the scale and may have a limited life. 
 
 
When Using the AC adapter 
Step 1  Verify that the AC adapter is correct. 
 
Step 2  Plug the AC adapter into the  AC adapter jack. 
 
 
Possibility of Electrostatic Influence 
When the ambient humidity gets low, 
plastics and insulators  will be easily charged. 
That may make the reading unstable and 
cause some errors. To reduce the 
electrostatic influence, ground the scale...

 6
Errors 
 eeeeee      Overload. Remove object from the weighing pan. 
 ------      Out of range or unstable error. Th ere is a load beyond the zero 
range at the power-on. When pressed the  RE-ZERO  key or 
powered on, unstable weighing shows this display either. 
  lbeeee      Low battery. Replace batteries with four new ones immediately. 
 Caleee      Calibration error. Unstable weighing or incorrect calibration weight. 
 erree#      Internal errors (# will be 1, 2, 3, 4, 5 or 6). Request service....

 7
 
Automatic Power Off Function   
If the scale is left ON and the STABLE { is displayed, the automatic 
power-off function turns power off after approximately 5 minutes. 
  poff 0      Automatic power off function is disabled. 
 poff 1      Automatic power off function is enabled. (factory default) 
 
Setting the Response/Stability Condition 
This function is to specify the  response speed and to stabilize the 
weight value reducing the influence of ambient environment like 
vibration. But note that...

 8
 
Setting the Weighing Units to Use 

 9
CALIBRATION 
When is Calibration Required?   
Calibration may be required when 
the scale was initially installed or 
has been moved to another 
location. 
   
 
Calibration Using a Calibration Weight   
Step 1  Press the Calibration switch while the scale is in the weighing mode. 
Then,   Cal       will be displayed. 
 
Step 2  Press the    RE-ZERO    key and    Cal  0
g    will be displayed. 
With nothing on the weighing pan, press the    RE-ZERO    key. 
 
Step 3  The display shows    Cal...

 10
gravity acceleration of your scale to the value of the area where the 
scale is used. See “The Value of  Gravity Acceleration at Various 
Locations” of this manual. 
 
Step 1  Start  from    Cal     display at the Step 1 of “Calibration Using a 
Calibration Weight”, and press the  UNITS  key and the current 
acceleration value will be displayed.      ex.    9.7985  
 
Step 2  Press the    RE-ZERO    and the di git that can be changed starts to 
blink. Change the value with following keys. 
  RE-ZERO...