MEASURING INSTRUMENTS
Paul N. Gardner Co., Inc. • www.gardco.com • (954) 946-9454 • 1-800-762-2478
MODEL BM-20 BM-22 BM-252 BM-200 BM-300 BM-500
Weighing capacity 22g 5.1g/22g
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250g 220g 320g 520g
Minimum weighing value 0.001 mg 0.001 mg/0.01 mg 0.01 mg 0.1 mg
Repeatability 0.0025 mg 0.004 mg 0.03 mg 0.1 mg 0.2 mg
(Std Deviation) (for 1 g) /0.01 mg (for 100 g)
Linearity ±0.010 mg ±0.010 mg ±0.010 mg ±0.2 mg ±0.3 mg ±0.5 mg
/±0.02 mg
Stabilization time
(set to FAST) Approx. 10 sec. Approx 10/8 sec. Approx 8 sec. Approx. 3.5 sec.
Sensitivity drift
(10°C to 30°C) ±2 ppm / °C (When automatic self calibration is not used)
Operating temperature 41°F to 104°F (5°C to 40°C), 85% RH or less (non-condensing)
Display refresh rate 5 times/ second or 10 times/ second
Measurement Units g, mg, oz, ozt, ct, momme, dwt, GN, tael, tola, messghal,
(Display mode) pieces (counting mode), % (percent mode), Specific gravity
Counting mode Minimum unit mass = 0.1 mg / Number of samples = 10, 25, 50 or 100 pieces
Percent mode Minimum 100% ref. mass = 10.mg / Minimum 100% display = 0.01%, 0.1%, 1%
(depends on the reference mass stored)
Internal Memory 200 sets weighing data / 100 sets with date & time / 50 sets of calibration data
External Data Logger Store up to 5,000 weighing results with date & time to AD-1688 (standard)
Data Output GLP/GMP/GCP/ISO compliant. Outputs: balance manufacturer, model,
s/n, balance identification number, data, time of calibration, mass used, and space for signature.
Standard interface RS-232C, Quick USB, External key plug for optional foot switch (SW:128)
Internal calibration Motor-driven internal calibration
External calibration masses (g) 20, 10, 5, 2, 1 200, 100, 200, 100, 50 300, 200, 500, 300,
50, 20, 10 100, 50 300, 100, 50
Ionizer electrode pin life Approx. 10,000 hours of continuous use. (User replaceable)
Weighing pan diameter 25mm (50mm, 95mm 90-mm
for weighing filters)
Power consumption Approx. 30 VA (supplied by the AC adapter)
External dimensions/Weight 259 (W) x 466 (D) x 326 (H)mm / Approx. 10 kg
BM Series Specifications
Standard Accessories and Features
All BM Series balances come with the AD-1688 Data
Logger, A&D WIN-CT software, and are compliant
with GLP/GMP/GCP/ISO industry best practices.
RS-232 and USB ports are stan-
dard on all BM Series balances.
AD-1688 Weighing Data Logger
Stores up to 5,000 weighing results with date, time,
temperature, humidity and atmospheric pressure.
Download to a PC via USB port.
Dedicated Weighing Pans for BM-20/22
The BM-20 and BM-22 include two filter weighing
pans, designed to minimize the influence of drafts.
Also included with the BM-20 and BM-22 are hold-
ers for micro-centrifuge tubes and 3 sizes of dis-
posable aluminum pans with diameters of 8, 12,
15 mm.
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Smart range function: The minimum weighing value switches to 0.01 mg automatically when the display value exceeds 5.1g but returns
to 0.001 mg by pressing the RE-ZERO (tare) key.
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