C-Tech H1820 Product Manual Download Page 4

 

 

 

  - 2 - 

restore the pressure in the container to atmospheric pressure (no more than 8KPa per second). 

IV.

 

Matters need attention 

.

 

The instrument is equipped with an air drying device to ensure that the gas entering the vacuum 
pump is dry gas. If it is found that water is drawn into the pipeline due to wrong operation, the 
back cover of the box should be opened, and the drying device should be opened for drying. 

.

 

After the vacuum pump is started, if the value of the barometer stops, it means that the container 
is not tightly sealed or the pipeline is leaking. 

.

 

After the test, the container should be cleaned in time, and the water traces on the container, 
lid, vibration table and instrument should be wiped. 

.

 

After unpacking, install the instrument horizontally in a dry, ventilated and clean place, and the 

ambient temperature should not exceed 40°C. 

.

 

It is strictly forbidden to drop water into the instrument box due to operating errors. 

.

 

Except for oil change and drying the drying device, it is strictly forbidden to dismantle the 
protective plates of each part of the instrument if it is not a professional technician of the 
company. 

.

 

Precautions for maintenance of vacuum pump: 

 

The temperature of the pumped gas cannot exceed 40

, and the operating environment 

temperature is: 5

-40

 

It is strictly forbidden to run without oil. Do not block the exhaust port when the pump is 
running. During the test, oil mist-like gas will be emitted from the box, which is a normal 
phenomenon. 

 

Long-term work should always pay attention to whether the pump oil is sufficient. The oil in 
the fuel tank cannot be lower than the center of the oil mark. Insufficient oil will  affect 
performance and even damage components. 

 

To keep the oil clean. The new oil needs to be changed every 250

-300 hours after the new 

pump is used. If the pump oil becomes dirty, turbid, enters water or other volatile substances 

Summary of Contents for H1820

Page 1: ...I LARGE CAPACITY VACUUM PYCNOMETER SET H1820...

Page 2: ...I CONTENTS I Description 1 II Technical specifications 1 III Operation 1 IV Matters need attention 2 V Digital vacuum gauge 3...

Page 3: ...vibration Dimensions 440 440 520mm Weight About 30kg III Operation Connect the equipment to the vacuum pump and vacuum gauge Turn on the vacuum gauge For operation methods refer to V Digital Vacuum Ga...

Page 4: ...40 C It is strictly forbidden to drop water into the instrument box due to operating errors Except for oil change and drying the drying device it is strictly forbidden to dismantle the protective plat...

Page 5: ...the performance of refrigeration systems and heat pumps usually during commissioning And you can gauge the real time pressure of the refrigeration system in vacuuming thus gathering information releva...

Page 6: ...Set point Resolution mbar 0 9999 0 01 bar 0 9 99999 0 1 Structure Operation guidance Press the to turn on the device and press again the power button to choose turn on or off the backlight A LED Scre...

Page 7: ...larms continuously whose frequency is 1 Hz The alarming will automatically disappear or pressing any key or automatically disappear after 30 seconds when current pressure is higher than the set pressu...

Page 8: ...ion otherwise a fault will appear Calibration mode 3 custom calibration showing CAL 3 short press the HOLD the lower row of Nixie tube will show six 0 000000 and the decimal point will be displayed at...

Page 9: ...7 The following items are not covered by the warranty Man made faults are not covered by the warranty...

Page 10: ...8...

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