C-Tech H1820 Product Manual Download Page 5

- 3 -

during use, it should be replaced with new oil in time to avoid affecting the vacuum degree 
or unable to operate. It is best to use vacuum pump oil, or mechanical oil above No. 20. 

Before replacing the new oil, it should be turned on for 15

-30 minutes to thin the oil. After

stopping the pump, unscrew the oil drain screw and drain all the dirty oil in the pump. Then
pour 300ml of new oil from the air inlet, start the motor to run for 1 minute to clean the
inside of the pump chamber. Repeat 2-3 times, and after confirming the cleaning, pour in
new oil.

V. Digital vacuum gauge

Our product is a digital vacuum gauge to accurately measure micro change of pressure in vacuum. 
You can use the vacuum gauge to monitor 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 relevant to dehydration and cleaning foreign body (such as 
oil, external gas and etc.). Digital vacuum gauges parallel with vacuum pumps (making vacuum) in 

utilization  and  furthe

r, refrigerant gauges (emulation or  digital) are often employed to monitor 

refrigeration system. 

Technical specifications 

Vacuum tolerance 

±(10%lndicating value+10microns) 
(100-1,000microns) 

Working temperature 

-

10~50

Storage temperature 

-

20~50

Temperature scale 

-

10~50

Temperature resolution 

0.1

 

Parameters 

mmHg, inHg, umHg, ftH

2

O, cm

H

2

O, in

H

2

O, Pa, Kpa, mbar, bar, Kg/cm

2

, psi, oz/in

2

 

Measurement cycle 

0-26.66mbar / 0-20,000microns

Vacuum resolution 

1micron (0-1,000microns) 
10microns (1,000-2,000microns) 
100microns (2,000-

5,000microns)

 

500microns (5,000

-10,000microns) 

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...

Reviews: