25
Gem Series
Model GD603 GD103 GD502-DS GD252,
GD252-DS
Weighing capacity 605 ct/121 g 185 ct/37 g 505 ct/101 g 255 ct/51 g
Readability 0.001 ct/0.2 mg 0.001 ct/0.2 mg 0.005 ct 0.005 ct
Tare range (subtractive) 605 ct/121 g 185 ct/37 g 505 ct/101 g 255 ct/51 g
Repeatability <± 0.001 ct/0.2 mg 0.001 ct/0.2 mg 0.0075 ct 0.0075 ct
Linearity <± 0.002 ct/0.4 mg 0.002 ct/0.4 mg 0.015 ct 0.015 ct
Operating temperature range +10…+30 °C (50°F to 86°F)
Allowable ambient 
operating temperature +5.… +40°C (41°F to 104°F)
Sensitivity drift
within +10…+30 °C <±/K 2·10
–6
2 ·10
–6
4·10
–6
4·10
–6
Response time (average) s 3 3 2,5 2,5
Adaptation to ambient conditions By selection of 1 of 4 optimized filter levels
Display update (depends on the
filter level selected) s 0.2–0.4 0.2–0.4 0.2–0.8 0.2–0.8
External calibration weight g 100 (F1) 20 (F1) 50 (F1) 50 (F1)
(of at least accuracy class)
Net weight, approx.  kg 3.0 3.0 1.7/2.7 1.7/2.7
Pan size mm 90 d 90 d 100 d 100 d
Weighing chamber height mm 133 133 133 GD252-DS: 133
Dimensions (B+T+H) mm 200+270+233 200+270+233 200+270+233 200+270+120/
200+270+233
AC power source/ 
power requirements  AC adapter 230 V or 115 V, +15% to –20%
Frequency 48–60 Hz
AC power source/ 
direct current V 10–20
Power consumption (average) W 1 1 0.75 0.75
Hours of operation with  
the YRB08Z rechargeable 
battery pack h 20 20 25 25