In laboratory monitoring projects, different laboratories have requirements for temperature and humidity, and most of the experiments are conducted in an environment of clear temperature and humidity. Laboratory environmental conditions directly affect the results of various experiments or tests. Accurate and reliable monitoring instruments are required to provide accurate environmental parameter data for each experiment.
The key factor to be considered in temperature and humidity control under environmental conditions is to ensure that the environmental temperature and humidity of the experimental operation can meet the needs of each process of the experimental program. We mainly formulate the range of laboratory environment temperature and humidity control from the following aspects.
First of all, identify the requirements for environmental temperature and humidity.
We mainly identify needs of instrument, reagent and experimental procedures, and humanistic considerations for laboratory staff (human body feels comfortable when relative humidity is in the range of 35 - 80% and temperature at 18 - 25 ℃, and there is a certain causal relationship between environmental dryness and throat inflammation from a medical point of view). The four factors are comprehensively considered, and requirements for controlling the range of temperature and humidity is listed.
Second, select and formulate effective range for environmental temperature and humidity control
The narrowest range is taken from the list of all requirements of the above elements as the allowable range for environmental control of the laboratory, the management procedures for environmental condition control are formulated, and a reasonable and effective SOP is formulated according to the actual situation of the department.
Third, maintain and monitor.
Through various measures to ensure the temperature and humidity of the environment within the control range, and to monitor the temperature and humidity
of the environment and make monitoring records. When the temperature and humidity exceed the allowable range, timely measures such as turning on the air conditioner to adjust the temperature and turning on the dehumidifier to control the humidity should be taken.
During pathological experiments, the use of microtome, dehydrator, dyeing machine, electronic balance and other instruments has relatively strict requirements for temperature. For example, electronic balance should be used under the condition of stable ambient temperature (temperature change is not more than 5 ℃ per hour) as far as possible. Therefore, the temperature and humidity of such laboratories need to be monitored and recorded in real time.
DSR temperature and humidity recorder can provide accurate recording data of temperature and humidity, which is helpful for the smooth progress of various experiments.
It has strict requirements for temperature and humidity of the environment. Under normal circumstances, temperature of the cold place is 2 ~ 8 ℃, and temperature of the cool place is not more than 20 ℃. Higher or lower preservation temperature of antibiotics will make it inactivate, and inactivation temperature of different kinds of antibiotics is also different. Therefore, monitoring and recording of temperature and humidity recorder is an important link in such laboratory environment.
Chemical detection room
The chemical laboratory includes a variety of laboratory rooms, such as chemical testing room, physical testing room, sampling room, etc. There are different standards for temperature and humidity of each room, and a special person is designated for each room to monitor its temperature and humidity regularly, usually twice a day. By using DsR temperature and humidity recorder plus professional networking connection, staff can check the temperature and humidity status of each laboratory at the central console, download and save the records of temperature and humidity during the experiment.
Experimental animal house
The environment requirements of animal laboratory focus on the experimental animals. It is required that the humidity should be maintained between 40% and 60% RH. Take rats as an example, if they live in an environment with relative humidity below 40%, they will easily fall ill then die. DSR temperature and humidity differential pressure recorder can establish a temperature and humidity monitoring and recording system through networking alarm and other measures, which is conducive to the control of temperature and humidity differential pressure in animal rooms, prevent the spread of diseases and avoid mutual infection of animals.
Temperature and humidity have certain effects on the performance of some building materials, so the environmental conditions for material testing are clearly stipulated in many standards and must be observed. As stipulated in GB/T17671 1999, the laboratory temperature shall be kept stable at 20 ℃ ±2 ℃ and the relative humidity shall not be less than 50% RH when the specimen is molded. When we use DSR temperature and humidity recorder, a set of temperature and humidity monitoring and recording system can be established according to the laboratory's own conditions to strengthen the laboratory's temperature and humidity control.
Certification and Metrology Laboratory
The certification and metrology laboratory needs to record the changes of temperature and humidity in the whole process of inspection in real time when implementing inspection, identification, testing and certification services. Using DsR temperature and humidity recorder can simplify the recording work, save costs, and the recorded data will not be interfered by too many human factors, which can objectively and truly reflect the detection process. Whether the temperature and humidity of the test environment and equipment is accurately controlled or not has a great influence on the accuracy and repeatability of the test results. GLP, GAP, CNAS, ISO17025, ISO15189, ISO17020, ISO9000, ISO16949, ISO14000 and other certifications are the basic requirements for the laboratory environment. Products of ZOGLAB meet various requirements like providing accurate monitoring and original records with high precision that cannot be tampered with.
Judging from the indoor environment of the laboratory, there is almost no situation that can lead to sharp temperature difference and excessive humidity. Therefore, there are very high requirements for short-term control degree of the temperature and humidity regulator, and it should be strictly controlled by cooling, heating, humidification and dehumidification.
At the same time, from the perspective of the external environment, the temperature and humidity changes in the laboratory room will be affected by external conditions. For example, the climate characteristics of the region, the temperature difference between day and night, and various special weather will result in temperature and humidity changes. Therefore, in order to ensure the balance of temperature and humidity and reach the experimental standard, the laboratory needs to be sealed off, thus preventing indoor air from changes when unexpected situation happens in external environment.
Strict requirement for the timing of sending fresh air by the management personnel should be made to prohibit the pollution of indoor environment caused by the negligence of personnel. It is required to make temperature measure in environment when using lighting equipment and precision instruments, ensuring that the indoor temperature and humidity within the range of specified deviation.
In particular, the change of relative humidity in the laboratory should be strictly controlled. There are no other conditions in the air of the laboratory that lead to temperature and humidity difference. When the temperature of the air changes by 1.0 ℃, it will lead to a large change of relative humidity and affect the normal operation of indoor instruments. Even a temperature difference of 0.2 ℃ will cause a humidity change of more than 0.5%.
Therefore, laboratories that are very sensitive to temperature and humidity need to use professional sensors to strictly control the deviation, especially to achieve accurate monitoring of humidity. There are two kinds of sensors, one is temperature sensor
, which is relatively accurate; the other is the humidity sensor, which will be inaccurate under certain conditions. The humidity of the air must be monitored regularly to ensure accuracy. At the same time, attention should be paid to the uniformity of the whole control area for temperature and humidity when constructing the laboratory.