CALIBRATION__________________________________________ 
Important: Always perform calibration procedure after first turning the unit on and allowing it to warm 
up and stabilize for 20 seconds. If possible please calibrate the scale on your SCALEPAD (included in the 
box), mousepad or similar surface. Calibrate your scale at regular intervals if the scale is subject to 
weather or altitude changes or if the display shows Out2. Incorrect calibration can occur if you do not 
follow the steps exactly. If your scale does not perform accurately, please also try replacing your 
batteries. You will need a 100 gram weight (or 200 gram for the 550) to calibrate this scale.  
NOTE: if you do not have access to a calibration weight you can purchase one at your local store or in 
emergency situations you can use coins or weights (ie 20 US Nickels = 100g) as a calibration weight.  

Calibration Procedure: 
1) Turn the scale OFF and Place the it on a Flat, very stable surface  
(Be certain the scale is OFF)  

2) Press and hold both the “CAL” and “ON/OFF” keys for 5 seconds, the display will show 2ERO and then 
100.0 (or 200) 

3) Gently place the correct calibration weight on the tray and wait 3 seconds. 

4) Press the ON/OFF key. The display will show CAL and then PASS,  
calibration is complete. Gently remove the weight and turn the scale Off.  

NOTE: if after calibration your scale does not read accurately, this indicates calibration error and the 
calibration process should be repeated more slowly. Please calibrate on your scalepad, mousepad or 
similar surface if possible. 

FEATURES____________________________________________ 
* Power Up Segment Test: When first turning the unit on, all segments of the display will appear as 
shown below. This display will remain for approximately 3 seconds and then reset to zero. The display 
may also change brightness during this time and show a blank screen for a moment before 0.0 appears 
=8.8.8.8.8 > 

Stable Reading Indication: This is a very precise scale - the display may seem to wander or jump when 
weighing. This is due to air currents or vibrations. Stable weighing is achieved when the display remains 
fixed for 3 seconds. 

* Overload: When an applied load exceeds the capacity. “HHHH” will appear on the display. Remove 
excessive load immediately. The unit may return to normal operation. !Remember: You can 
permanently damage the scale and void your warranty by overloading it! 

* Negative Value: Any tared value will be displayed as a negative number once all weight is removed, 
press TARE or cycle the power to re-zero the scale. 

* Auto off: An auto shut off feature is provided to conserve battery power. The unit will automatically 
turn off after approximately 2 minutes of inactivity.