C-Tech H1820 Product Manual Download Page 8

 

 

 

  - 6 - 

switch the calibration mode. The upper row of digit shows 1 or 2 or 3 or 4, and short press the 
“Units” to exit the calibration mode 1. Atmospheric correction: showing CAL-1 means snort 

pressing the “HOLD”, and at this time the show of the lower row of Ni

xie tube shifts from empty 

to sequentially lit --, and returns to the normal mode. This calibration is just a translation curve 
(exercised under atmospheric pressure ) (the air pressure needs, during calibration, greater than 

85kap, otherwise a fault will appear).

 

 

Calibration mode 2, vacuum calibration: showing CAL-

2 , short press the “HOLD1”.At this time, 

firstly judge whether the current air pressure is lower than15kpa. 

If it isn't, the lower row of Nixie 

tube will exhibit Error, and press any key to return to the normal. If it is, the exhibition of the lower 
row of Nixie tube will shift from empty to --, and return to the normal mode. This calibration will 
change the slope of the curve (performed in the vacuum environment) (the air pressure needs 

lower than 15kap, during calibration, 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 paralleled 
position in light of the current unit. At this time, the rightmost number will flash. In this preference, 

short press the “HOLD” to switch the cursor location, and “Max” is for

 digit minus, “

℃/℉

 key” for 

digit plus (settings range 0-

60kpa).  After  setting  the  value,  short  press  the  “HOLD”:  for 

calibration, and at this time, the exhibition of the lower row of Nixie tube shifts from empty to 
sequentially lit -- and returns to the normal. This calibration will change the slope of the curve 
(under specified negative pressure). 

 

Calibration mode 4: resume the factory-set calibration value, showing CAL-4, short press the 

“HOLD”, and the pressure curve will return to the factory settings.

 

Warranty 

Thank you for choosing our products, we will provide you with the following services and promises.   

 

The warranty period of this product is 1 year.   

 

After the warranty period expires, repairs will be charged for replacement parts. 

 

After the failure, please contact the manufacturer, we will give you the most complete service in 
the shortest time. 

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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