PRECISION BALANCE AXIS Precision balance AXIS BTA2100D maximum load 2.1 kg accuracy 0.01 g pan Φ150 mm external calibration legalization at extra charge Precision balance AXIS ATZ2200 maximum load 2.2 kg accuracy 0.01 g pan Φ150 mm external calibration legalization at extra charge Precision balance AXIS ATA2200 maximum load 2.2 kg accuracy 0.01 g pan Φ150 mm internal calibration legalization at extra charge