General Information on CW250 Scale
This unit is designed as an NTEP Class III weighing device.
Data Interface: 20mA current loop/RS232 Output
Batteries: Six AA 1.2 volt nickel cadmium (standard), or six AA 1.5 volt alkaline
Battery Life: Approximately five years (1500 charge/discharge cycles.)
Battery duration between charges:
Approximately 8 hours of continuous use before the low battery indicator comes on, and up to two hours after that before the scale automatically shuts itself off. (These numbers are lowered by use of lamp or active current loop transmission.)
Charging Voltage: 11.5 volts to 14.5 volts DC. Protection is provided for accidental reversal of charging connections.
Charging Current: Starts at 300mA and drops down to 50mA after 8 hours.
Charging Time: 8 hours if the batteries are discharged to the point of shutting off the scale.
Construction: All aluminum design provides EM/RFI immunity.
Accuracy: +/-0.1% of applied load (NTEP Class III)
Controls:
General: All located on waterproof membrane keypad with large contact surfaces.
Print: Outputs weight local
On/Off: Two separate switches for unambiguous operation.
Zero/Test: Pushbutton zero checks for motion to HB-44. Test performs internal test.
Hold/Release: Hold places scale in automatic capture mode for in-motion weighing. Release places scale in "normal" static weighing mode.
Lamp: Momentary action to activate high efficiency light emitting diodes for night usage.
lb/kg: Sets unit of measure
Local/Total: Local is the standard mode for weighing. Total enables the scale to accumulate weights with other similar scales. Indicators:
Total: Accumulative mode of weighing
Battery: Low battery
Hold: In-motion weighing mode
lb/kg: Unit of measure
Performance:
Speed: 950 milliseconds to typical reading (static).
Accuracy: +/-0.1% of reading static mode.
+/-0.2% of reading holding mode.
Units: lb, kg selectable
Safe Overload: 150% of capacity

Specifications
Ambient
Humidity: 5 to 95% Non-Condensing
Temperature:
Operating:
-28 C to 65 C
-20 F to 150 F
Storage:
-40 C to 75 C
-40 C to 170 F
EMI/RFI: Meets Mil Spec 461

Physical:
Dimensions and weight:
24x24x4"/610x610x100mm
85 lbs./39 kg
15x15x4"/380x380x100mm
38 lbs./17kg
Case: Aluminum
Electrical:
Voltage; Self-contained nickel cadmium batteries (standard) or alkaline. Integral recharger to charge or operate from a 12, 110 or 220 volt power source.