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Micro Balance
CM-P Pipette Micro Balance
The Aczet CM-P Series pipette micro balances are made for gravimetric pipette calibration and liquid weighing. The CM 11P (11 g) and CM 21P (21 g) read to 1 µg and are suited to testing the volume of pipettes of any size by the gravimetric method, including tests based on ISO 8655. A cylindrical glass weighing chamber reduces electrostatic influence, an optional evaporation trap limits evaporation of the test liquid, and motorised internal calibration, RS 232C output and a built-in clock support GLP records.
Specifications across the series
These are ranges for the whole CM-P Pipette Micro Balance line. Each model has its own exact values: see the brochure below or ask our team and we will confirm the right model for you.
- Model
- CM 11P, CM 21P
- Readability (mg)
- 0.001 (1 µg)
- Weighing capacity (g)
- 11 to 21 (CM 11P: 11, CM 21P: 21)
- Minimum load (µg)
- 100 (CM 11P)
- Pan size (mm)
- Ø 20 (CM 11P; datasheet gives Ø 15 to 30 for the series)
- Repeatability (µg)
- 1.2
- Linearity (µg)
- 6 to 7 (CM 11P: 6, CM 21P: 7)
- Tare range (g)
- -11 to -21 (equal to capacity)
- Minimum sample weight (mg)
- 0.24 (CM 11P)
- Minimum sample weight, as per USP (mg)
- 2.4
- Response time (sec.)
- 8 to 10
- Sensitivity drift (ppm/°C)
- ± 1
- Calibration and adjustment
- Motorised internal calibration
- Display
- Alphanumeric backlit LCD
- Operating temperature (°C)
- 18 to 30
- Units
- gm, mg, ct, GN, mo, oz, dwt, t1T, t1H, t1S, mom, Bat, MS
- Application modes
- PCS, % weighing, animal / dynamic weighing, check weighing, automatic density determination, formulation, automatic statistic calculator
- Interface
- RS 232C, USB optional (Windows direct communication)
- Power supply
- DC adapter, input 100 to 240 V / 0.8 A, output 13 V / 1.5 A
- Compliance
- ISO, GLP / GMP compliance
- Balance size, W × D × H (mm)
- Mechanical box: 360 (L) × 140 (W) × 146 (H) / Electronic box: 240 (W) × 210 (D) × 65 (H)
- Weight, approx. (kg)
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Key features of CM-P Pipette Micro Balance
1 µg readability for pipette testing
The CM 11P (11 g) and CM 21P (21 g) read to 1 µg, so even the smallest pipette volumes can be weighed gravimetrically.
Glass weighing chamber
A cylindrical glass chamber reduces electrostatic influence, and the draft shields come apart easily for cleaning.
Optional evaporation trap
The CET 01 trap steadies the humidity in the chamber and limits evaporation of the test liquid, so room humidity need not be raised.
Automatic internal calibration
Motorised built-in weights plus PSAC recalibrate the balance when the temperature changes or after a set time.
GLP-ready records
Built-in real-time clock, RS 232C output (USB optional) and ten built-in applications support traceable, error-free documentation.
Key advantages of CM-P Pipette Micro Balance
Covers every pipette size
Aczet states the balance suits gravimetric testing for any pipette size, up to the 21 g capacity of the larger model.
Stable weighing conditions
The glass chamber and optional evaporation trap help keep static and evaporation from shifting your readings.
Low sensitivity drift
Sensitivity drift is stated as ±1 ppm per °C within the 18 to 30 °C operating range.
Overload protection
The built-in capacity tracker shows how close you are to the limit, which helps protect the weighing cell.
Qualification support
IQ, OQ and PQ qualification documents and 21 CFR Part 11 PC software are listed as accessories for regulated labs.
About CM-P Pipette Micro Balance
The Aczet CM-P Pipette Micro Balance is a user-friendly microbalance for pipette calibration. Aczet states that it gives accurate gravimetric testing for any pipette size, and that it can be used for ISO 8655 or any other test based on the gravimetric method: you dispense a liquid, weigh it to 1 µg and convert the mass into volume. It suits calibration laboratories, quality departments and research labs that check their own pipettes.
Two models, 1 µg readability
CM 11P: 11 g capacity, 1 µg readability, repeatability 1.2 µg, linearity 6 µg.
CM 21P: 21 g capacity, 1 µg readability, repeatability 1.2 µg, linearity 7 µg.
Made for liquid weighing
An aesthetic, cylindrical weighing chamber made of glass minimises the influence of electrostatic charges on the result.
The optional CET 01 evaporation trap stabilises the humidity inside the weighing chamber and so limits evaporation of the test liquid, which would otherwise cause measurement errors. You no longer need to raise the humidity of the whole room.
The draft shields can be dismantled and assembled easily, which keeps the balance clean.
The balance has two parts, a mechanical measuring cell and a separate electronics box, so the electronics do not influence the measuring cell.
Proven weighing technology
The sensor works on electromagnetic force compensation (EMFC). Motorised built-in weights calibrate the balance internally, and the Perfect Self Automatic Calibration (PSAC) function repeats the calibration when the temperature changes or a set time has passed. A capacity tracker on the display helps you avoid overloading the weighing cell.
Operation and documentation
A bright backlit LCD with large digits and ten built-in applications (including density determination, check weighing, totalling and formulation) simplify routine work. RS 232C output (USB optional) and a built-in real-time clock give traceable records for GLP and GMP. Optional accessories listed by Aczet include an anti-static ionizer, a dot-matrix data printer, 21 CFR Part 11 PC software, an anti-vibration table or pad, test weights, a battery backup and qualification documents (IQ, OQ, PQ).
The table on this page shows ranges for the whole CM-P series. Tell our team the pipette volumes you test, and we will confirm the right model and share the exact figures for it.
Documents & research papers
Frequently asked questions: CM-P Pipette Micro Balance
It is used for gravimetric pipette calibration: the pipette dispenses a liquid onto the balance, the mass is measured to 1 µg and converted into volume to check the pipette's accuracy.
The CM 11P weighs up to 11 g and the CM 21P up to 21 g. Both read to 1 µg (0.001 mg). Aczet's datasheet lists both models; please confirm the current availability of each with our team.
Aczet states the balance can comply with ISO 8655 or any other specification based on the gravimetric method. The standard's requirements depend on your pipette volumes, so ask us about the right model for your tests.
When small volumes of liquid evaporate during weighing, the result is too low. The optional CET 01 evaporation trap stabilises the humidity inside the weighing chamber, which limits the evaporation of the test liquid.
Aczet's product page lists a 20 mm diameter pan for the CM 11P, and its datasheet gives a 15 to 30 mm range for the series. Our team can confirm the pan of the model you choose.
It has motorised internal calibration with built-in weights. The Perfect Self Automatic Calibration (PSAC) function repeats the calibration automatically when the temperature changes or after a defined time.
The balance has an RS 232C interface, with USB (Windows direct communication) as an option. A dot-matrix data printer and 21 CFR Part 11 PC software are listed as accessories.
Aczet gives the operating temperature as 18 to 30 °C. Install it on a stable bench; an anti-vibration weighing table or pad is available as an accessory if the bench vibrates.
Enquire about CM-P Pipette Micro Balance
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