A laboratory is a place where research is carried out in diverse fields to achieve multifarious objectives. A researcher carries out a slew of tasks that involves the measurement of different samples. This is where a precision balance for laboratory becomes an important enabling device, which can have an impact on the outcome of research. Although while using a balance for quantitative analysis we often take its reading for granted, there may be instances when it can give erroneous readings. This may happen due to reasons such as:
Temperature
If the temperature inside a laboratory increases the weight of the sample can show a change – either expand in volume or lose weight due to evaporation of the water content inside. Similarly, if the temperature decreases – either the sample contracts thus showing a loss in its weight or gain weight as the water content condenses. Hence, it is important the temperature inside a precision balance for laboratory remains unchanged.
Vibration
A precision balance is a very sensitive device where the machinery can be affected by even minute vibrations. The vibrations can be caused by big machines like generators, coolers, air conditioners, or refrigerators, some of which might be present inside laboratories. Such vibrations can either displace, rearrange or spill the samples that are kept inside leading to the alteration in their weight.
Air pressure
Not only temperature but airflow too can affect the sample content that is present in a precision balance. Thus, it is important the balance is not placed under a source of airflow like a fan, cooler, air conditioner or even near an open door or window.
Chemical Reaction
There are volatile substances such as sodium or white phosphorous that can cause a fire when there is a slight change in the atmospheric pressure. Such chemical reactions can be dangerous to the research team or the property in a laboratory.
User Errors
Many a time the wrong calibration of a precision balance by a user can cause an erroneous reading. It is thus important to secure the laboratory to preclude any change in the atmospheric pressure due to user error.
In addition to preventing the above mentioned factors from impacting the workings of a precision balance for laboratory, it is of paramount importance that such a balance adheres to the highest standards of quality. This is where precision balances from HiWEIGH, an experienced ISO9001 China based company, can be used for their quality (OIML, EC type approval, and ISO17025 for a select few balances,) and range.
Diverse Range
The Various types of Precision Balance from HiWEIGH are as follows:
BJA: Available in nine models this particular type has a maximum capacity of 6100gm with features such as an imported EMF cell, a bright VFD display, RS232 interface etc.
JT: Available in eight models with a maximum capacity of 3100gm the features include animal weighing, checkweigh function, clock set, zero/tare etc.
FH: With a maximum capacity of up to 6000gm, the features include HBM load cells, and LCD display among others.
BLB: With a maximum capacity of 30kg this precision balance in four models has a number of features such as a rechargeable battery, accumulation & counting functions etc.
Conclusion
The readings of a precision balance can be affected by a number of factors. The ones from HiWEIGH should be preferred for their advanced features, the range of models, and quality certification.