C-Tech H1820 Product Manual Download Page 7

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Press the “UNITS” to choose the needed pressure unit.

Press the “Max” to switch between the maximum and the minimum pressure.

“DIF” is identical with “SET”. Press “DIF” for some time accompanied by 

℃/℉

 and “MAX” to

designate the alarming value of vacuum pressure, and confirm by pressing “

HOLD

”.

Press “

℃/℉

” to switch the unit of temperature.

Mode 

Divided into normal and monitoring mode 

The mode is normal When the device is turned on, and in short time press the “

HOLD button

for monitoring mode. Again short press it to exit the monitoring mode. Under the monitoring
mode, the temperature is showed normal, with the SET light on the screen flashing, Whose cycle

is 1 Hz. The buzzer sounds once

 every three seconds. If the current pressure is lower than the

designated pressure at this time, an alarm will run. In Which period, the backlight flashes and

the  buzzer

  alarms 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 pressure, and after that, the device is still in the monitoring mode.

Under monitoring mode or normal one, long pressing “

HOLD

”  will enter the set  screen of

alarming pressure, at Which time, SET lights for a long time with six “0” (000000) on the screen.
Decimal point will be displayed in light of the present unit, at which time the rightmost digit
flashes. At this preference, short pressing “SET” could switch the location of cursor. “Max” is for
digit plus and “

℃/℉” 

is for  digit  minus. (set range 0-99kpa) Short press “

HOLD

”  to exit and

reserve, whose designation value will be saved in single-ship micro-computer. During the process,
short press “Units” to exit the settings.

Calibration 

Divided into four modes 

Under normal mode, long press “HOLD” to enter calibration mode.

At this time lighting Cal, the upper row of digit exhibits 1, and short press the 

“HOLD button” to

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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