Introduction to the temperature setting of the constant temperature water bath

Introduction to the temperature setting of the constant temperature water bath The constant temperature water bath is a common laboratory instrument, which can not only be used for distillation, drying, concentration, but also constant temperature heating and other temperature tests
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Let’s follow the editor to learn about the temperature setting of the constant temperature water bath
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Use of constant temperature water bath and matters needing attention 1.
Safe electricity use: This product uses 220V AC power supply, and the power socket should be a three-hole safety socket, which must be properly grounded, and the ground wire must not be connected to the gas pipeline
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2.
Pour water into the water tank before power-on.
The heating tube must not be exposed to the water surface during use, otherwise the heating tube will burn or even burst or leak and get an electric shock
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1.
Setting the temperature: Press the SET key to set or view the temperature set point
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Press the SET button and the characters of the digital tube will start to flash, indicating that the meter enters the setting state.
Press the △ button to increase the setting value, and press the ▽ button to decrease the setting value.
Long press the △ button or ▽ button and the data will change rapidly.
Press again.
SET button, the instrument returns to normal working state, and the temperature setting is completed
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 　　2.
Parameter setting: Press the SET button for 3 seconds, the meter enters the inner parameter setting state, and the meter displays the following parameters in sequence
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 　　E: This parameter is the advance amount of heating stop when P=0.
When P is not equal to 0, the instrument is in automatic adjustment mode.
When P is not equal to 0, E parameter is meaningless
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 　　P: is the proportional band, that is, the proportional control value.
When the instrument is started at room temperature, it is heated with full power.
When the P value is less than the set temperature, the instrument enters the automatic proportional working mode
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If P=0, the temperature of the instrument has been increased to the set point minus the advance amount E, and then the temperature drops to the advance amount and then enters the heating state
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 　　T: It is the heating output cycle period, that is, the working cycle period of the relay.
A small T value has a good control effect, but if the T value is too small, the life of the relay will be shortened due to frequent work
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Generally, the T value is 20-60 seconds
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 　　Example: If P is 3.
0, the heating cycle period T is 60
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Set the temperature to 40 degrees
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Turn on the power supply, the instrument controls the heating to 40-3=37 degrees and then enters the proportional working mode.
The instrument supplements the heating body with energy every 60 seconds until the temperature is balanced
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 　　If P=0, E=0.
5, set the temperature to 40 degrees
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Turn on the power supply, the instrument controls the heating to 40-0.
5=39.
5 degrees, and then stops heating, and starts heating again after the temperature drops to 39.
5 degrees
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 　　3.
Error correction: When it is confirmed that the value displayed by the instrument is not the correct measurement value, the displayed value can be corrected
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Press the SET button for 3 seconds to enter the inner menu of the instrument, the first parameter that appears on the instrument is E, press the SET button again and the instrument data will flash, and the flashing parameter is the error correction parameter, which can be modified with the △ or ▽ key.
parameter
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The range of error correction is -9.
9°C to +9.
9°C, and then press the SET key to display the P and T parameters in turn, and then press the SET key to exit
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When the instrument leaves the factory, the correction value is 0.
When using, it is necessary to prevent the correct display of the instrument from being corrected to incorrect
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 　　The above is the relevant introduction about the temperature setting of the constant temperature water bath.
I believe that everyone has a corresponding understanding of this after reading, and I hope it can help everyone
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