DS-685L/F Series Service Manual
Page No. 5
1.7. Operation Condition
z Power source
a) DS-685L: AC 240/230/220V, 117/100V (+10%, -15%) (Factory Set)
DC 6 x D size dry battery (9V)
b) DS-685F: AC 240/230/220V, 117/100V (+10%, -15%) (Factory Set)
DC 12V 3Ah rechargeable battery (optional)
z Operating Temperature: -10
o
C to +40
o
C
z Operating Humidity: 15% to 85% RH
z Power Consumption
a) DS-685L: 1.5W for AC Power / 0.1W for Dry Battery
b) DS-685F: 18W for AC Power / 3.6W for Rechargeable Battery
1.8. Charging Condition (For Rechargeable Battery Only)
a) DS-685L
Power Source: DC 8V from charger
Charging Current: 800mA
Charging Time: 12 ~ 14 hours
b) DS-685F
Power Source: AC 240/230/220V, 117/100V. (Factory set)
Charging Current: 800mA
Charging Time: 18 ~20 hours
1.9. Analog Specification
z Input Sensitivity: 1mV/V
z Zero Adjustment Range: 0 ~+/-2.5mV
z Zero Balance Range: 0 ~ +/-0.5mV
z L/C Exciting Voltage: DC 5V
z A/D Conversion Speed: 3 times/sec
z Internal Resolution: 1/30,000 (DS-685L), 1/60,000 (DS-685F)
1.10. Main components used
z Microcomputer:
DS-685L:
NEC uPD75308GF (4 Bit, 8K PROM) or NEC Upd75304GF (4Bit, 4K ROM)
DS-685F:
NEC uPD75P216ACW (4 BIT 16K PROM) or NEC uPD75212ACW (4 BIT 12K ROM)
z Crystal Oscillator: 4.19 MHz
z Display Device:
DS-685L: Liquid Crystal Display (LCD)
DS-685F: Vacuum Fluorescent Display (FIP)
z Load Cell: 1K resistance load cell (OIML)
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