2 Working Modes & 1 Calibration Modes

2 Working Modes：

The mode is normal when the device is turned on, and in short time press the "DIF" button for monitoring mode. Again short press it to exit the monitoring mode.In the monitoring mode, the screen displays a flashing SET indicator, and the buzzer emits a single beep every three seconds, with a frequency cycle of 1Hz. If the current pressure is lower than the designated pressure at this time, an alarm will run.During this period, the backlight flashes and the buzzer alarms continuously, whose frequency is 1Hz. 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.

1 Calibration Modes：

Calibration mode : Long press the "CAL" button to enter calibration settings,automatically exits upon completion.

Our 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).

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.).

13 Measurement Units

The vacuum gauge is set up with 13 measurement units (mmHg, inHg, umHg, ftH2O, cmH2O, inH2O, Pa, Kpa, mbar, bar, Kg/cm², psi, oz/in²) which can be switched at will.

Buttons：

1. Power Button::Long press to turn on the device, and press again the power button to choose turn on or off the backlight.

2. Unit Button：Press the “UNITS” to choose the needed pressure unit.

3. MAX Button：Press the “MAX” to switch between the maximum and the minimum pressure.

4. DIF Button：“DIF” is identical with “SET”. Press “DIF” for some time accompanied by “C/F” and “MAX” to designate the alarming value of vacuum pressure, and confirm by pressing “HOLD”.

5. C/F Button：Press “C/F” to switch the unit of temperature.

Technical Parameters：

Working temperature：-10~50°C

Storage temperature：-20~50°C

Temperature scale：-10~50°C

Temperature resolution：0.1°C

Measurement cycle：0.5s