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Home   » Balances » Micro Balances » Pipette Microbalances CM 11/61 P


Pipette Microbalances CM 11/61 P

Microbalances CM 11/61 P

CMA/11P series of balances has been designed to meet high requirements for measuring small masses with readability of d= 1 µg. The weighing chamber has been specially designed for calibration of pipettes. Non-centrically located aperture in the upper part of the chamber makes it easier to insert a pipette. Such a solution limits possible air draughts. Pipette calibration may be conducted with a closed weighing chamber. Microbalances are equipped with graphic display with extended user menu. In order to guarantee proper accuracy of measurements, automatic system of calibration has been applied. Microbalance consists of two components. One of them contains electronic modules, and the other precise mechanical measuring system. Such solution guarantees elimination of temperature changes influencing the indication of the micro balance.

Microbalance features esthetic, cylindrical-shaped weighing chamber. All the elements of the weighing chamber are made of glass, which minimizes the influence of electrostatic charges on the weighing result. Microbalance software allows for composition of GLP procedures as standard printout or as freely definable non-standard printout. Balance series CMA is equipped with RS 232, PS/2 output and possibility of connecting additional display as standard.

Microbalances CMA/11P series is equipped with infrared sensors enabling opening of measuring chamber door and activating user defined functions of tare or printout.
Technical Specifications
MODEL CMA11/61/1/P
Max capacity 11/61g
Readability 2/10pg
Readability 4/10 pg
Linearity ± 15 pg
Pan size ø50 mm
Weighing chamber dimensions ø90x90mm
Stabilization time 10s
Calibration automatic (internal)
Working temperature +18° -+ 30° c
Power supply 230V/ 11V AC or 12V / 11V AC
Calibration stand for pipette
Microbalances CMA/ 11 P In order to ensure measurement cohesion, and meeting all the requirements resulting from supervision over measuring equipment and to facilitate the process of pipettes calibration CITIZEN recommends effective and ergonomic solution of calibrating automatic pipettes conducted by a user complete calibration stand for pippets!

Purpose: calibration of automatic pipettes from 10µ to 10ml with constant and variable volume.
Microbalances CMA/ 11 P
Unit contents:
  • Table for calibration
  • Analytical microbalance CMA /11P
  • Anti-vibration table
  • Ionizer
  • Probe for temperature, humidity and pressure measurement
  • Probe for water temperature measurement
  • Sink for used water (for right-handed or left-handed)
  • Armrests
  • LCD monitor
  • PC with ore-installed software PIPETTES
  • UPS power supply
  • Keyboard and mouse
  • Container for used water
  • The pipettes and other small accessories are not included in the unit content.
Calibration stand allows to perform pipettes calibration procedure by a user. The stand features high functionality and ergonomics, it can be operated by both right and left-handed users. Stability and security of operation is guaranteed by of UPS power supply. Pipettes calibration stand comprises of three basic modules:

Microbalances CMA/ 11 P



Microbalances CMA/ 11 P

Microbalances CMA/ 11 P


Microbalances CMA/ 11 P



Microbalances CMA/ 11 P


Microbalances CMA/ 11 P
MEASUREMENT MODULES:
1. Dual range analytical microbalance CMP/ 11P
Balance specially designed for pipettes calibration. The weighing chamber contains special ring producing "steam curtain" minimizing the errors resulting from evaporation: Basic parameters:
- Max: 11/61 g
- d = 2/10µg
- repeatability: 4/10µg
- linearity: ±15µg
More information and full technical specification are available in the product folder

2. Weighing table:
The table has been designed with special emphasis on fast,comfortable and ergonomic work.External construction of the desktop incorporates independent, internal anti-vibration table with a stone table top. This solution eliminates possible vibrations and significantly shortens stabilization time of the balance.



ENVIRONMENTAL MODULE:
1. Probes for water temperature measurement,relative humidity and atmospheric pressure. Parameters:
- air temperature: d = 0,1°C
- relative humidity: d = 1 %
- atmospheric pressure: d = 1 hPa

2. Probe for distilled water temperature measurement.
Parameters:
water temperature: d = 0,1 °C

Air ionizer:
Device minimizing the possible influence of electrostatics on the weighing process Parameters:
- throughput: 106 negative ions/cm3
-application: room size max 25 m2 (75m3)
More information and full technical specification are available in the product folder


COMPUTATIONAL MODULE:
1. PC computer
with LCD monitor, keyboard and mouse

2. PIPETTES computer software
conducting all the computation related to the procedure of pipettes calibration using gravimetric method in accordance with international standard ISO 8655-6.
The program allows to generate calibration reports, archiving measurement results and complex management of a pipette according to the standard ISO 10012.
More information and full technical specification are available in the product folder

Additional attachment for pipettes calibration
Additional attachment for CXA/CX or CM micro balances is a simple device designed to perform procedure of the calibration and /or check piston pipettes by gravimetric method. The device was designed to minimize evaporation during the weighing of the liquid. It consists basically of a special vessel placed inside the weighing chamber of CXA/CX (CM21P) balances,equipped with "evaporation curtain" and special pan which ensure central placement of the measuring vessel.
Use of this equipment for checking pipette allows to minimize the risks connected with evaporation. Low volume of measuring vessel in conjunction with the "evaporation curtain" allows to increase the relative humidity inside the chamber which slowing down the process of liquid evaporation during time of weighing. The contents of the package:
  • base element;
  • special pan;
  • measuring vessel of ~ 20 ml volume;
  • the dish of "evaporation curtain"
  • glass cover with a dosing hole.
The range of measured volumes - 1 ÷ 10 000 ml
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