1. When using the super constant temperature water bath for the first time, first check the thermostat power plug with a multimeter for one safety check, and use one of the measuring resistors to block the upper phase, middle and ground of the plug, whether there is a short circuit or poor insulation between each other. phenomenon. 2. Add distilled water according to the regulations (water level is about 30-43 mm from the cover). Turn on the power plug and turn on the power switch and electric pump switch on the control box to circulate the water in the tank. 3. Adjust the super constant temperature water bath to the set temperature. Assuming a room temperature of 20 ° C, the experimental temperature is set to 25 ° C, the adjustment method is as follows: first unscrew the locking screw of the upper end of the mercury contact thermometer spiral adjustment cap, and then rotate the magnetic screw adjustment cap so that the temperature indicating nut is located below To set the experimental temperature at 2~3 °C (such as 23 °C), turn on the heater switch heating (to save heating time, it is best to pour hot water about a few degrees lower than the required constant temperature), such as water temperature and setting The temperature difference is large, you can use high power heating (the heater switch on the instrument panel is in the “on†position). When the water temperature is close to the set temperature, use low power heating (the heater switch on the instrument panel is in the “heating†position). ). Look at the reading of the thermometer. When it reaches about 23 °C, turn the magnetic screw adjustment cap again, so that the contact and the mercury column are just turned on and off (when the constant temperature indicator is off). Heat slowly until the temperature reaches 25 °C, then tighten the locking screw. 4. If it needs to be cooled by the condenser tube on the thermostat below ambient temperature, it can be added with the same electric water pump as the thermostat. One cold water rubber hose is introduced into the condenser from the condensation cylinder into the nozzle and cooled. A pipe clamp is added to the rubber tube to control the flow rate of the cold water. The cold water can only be introduced into the cold state and can only reach 20-15 ° C and the electric heating switch must be turned off. 5. It is best to use distilled water for thermostat heating. Do not use hard water such as well water, river water or spring water. The tap water must be cleaned inside and outside after each use to prevent the scale from accumulating on the wall and affect the sensitivity of the constant temperature.
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