C-Tech H1820 Product Manual Download Page 3

- 1 -

I. Description

This instrument is suitable for measuring the theoretical maximum relative density of asphalt mixture 
by vacuum method. It is used for asphalt mixture ratio design, road investigation or road construction 
quality management to calculate void ratio and compaction degree. Not suitable for asphalt mixtures 
with porous aggregates with water absorption greater than 3%. 

II. Technical specifications

Power supply 

220v±10℅ 50Hz

 

Vibration motor input power 

40w 

Handheld digital vacuum gauge, negative pressure range

 

0 - 100kpa 

Test requirement 

3.7Kpa(±0.3) 

Working mode 

manual 

Container volume 

18000ml Class A negative pressure container 

Vibration mode 

Continuous vibration 

Dimensions 

440×440×520

mm 

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 Gauge.  The

vacuum gauge displays the current atmospheric pressure and temperature.

. Start the vacuum pump and the value of the vacuum gauge decreases. When the observed value

is 3.7kpa (± 0.3), turn off the vacuum pump to maintain the pressure. Start the vibration motor,
observe the bubbles in the container until there are no bubbles, then turn off the vibration
motor(the knob on the left side of the switch is used to set the vibration time). Observe the
vacuum gauge. When the pressure exceeds the range of 3.7Kpa(±0.3), turn on or off the vacuum
pump in time to maintain the pressure.

. After the test, open the top switch of the container. Slowly release the pressure to gradually

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: