BELEY 221752 Digital Micron Vacuum Gauge

Technical Specifications

• Unit : mmHg, InHg, umHg, ftH2O, cmH2O, InH2O
• 100Kpa/conversion: 750.061, 29.5299, 750061, 33.4552, 1019.72, 401.463, 100000, 100, 1000, 1, 1.01971, 14.5037, 232.060
• Resolution : 0.001, 0.0001, 1, 0.0001, 0.01, 0.001, 1, 0.001, 0.01

Instrument Description

Purpose

The purpose of this instrument is to accurately measure small pressure variations within a vacuum. It is a digital vacuum gauge that allows you to monitor the vacuum evacuation process in precision cooling systems and heat pumps, particularly during the debugging phase.

By utilizing this instrument, you can obtain real-time pressure readings during the evacuation of the refrigeration system, thereby gathering valuable information about the degree of moisture removal and elimination of contaminants such as oil and external gases.

Overview

The digital vacuum gauge is intended to be used in conjunction with a vacuum pump to create the vacuum environment. It is often paired with refrigerant gauges (analog or digital) to provide comprehensive monitoring of the cooling system.

Component Overview

1. The screen displays Status icons, measurement units, and values.
2. Control buttons: Used for operating the instrument.
3. Brass tee and straight connector: Used for connecting refrigeration hoses, vacuum pumps, refrigerant gauges, etc.
4. Battery compartment: Includes a 9V battery.

Overview of the screen display

Component

• 1 : Temperature and calibration mode
• 2 : Pressure value display
• 3 : Pressure unit display

Overview of the control buttons

• Component: 1, 2, 3, 4, 5, 6
• Function:
• Short press : Switch pressure units.
• Long press: Switch temperature units.
• Long press to enter pressure alarm value settings.
• The long press to enter calibration settings automatically exits upon completion.
• Short press : Toggle between MAX value and MIN value.
• Long press : Power on/off.
• Short press : Toggle backlight.
• Used for setting alarm pressure and adjusting other values.

Product Usage Instructions

Waste Disposal

Dispose of faulty rechargeable batteries/waste batteries in accordance with applicable legal regulations. At the end of the instrument’s lifespan, appropriately hand over the electronic components of the product to relevant entities for disposal. Please comply with local waste disposal regulations.

FAQ

• Q: How do I change the pressure units on the digital vacuum gauge?
  • A : To switch pressure units on the digital vacuum gauge, press the control button designated for changing units. A short press will toggle between different units while a long press may switch temperature units instead.
• Q: What is the purpose of the brass tee and straight connector in the instrument?
  • A : The brass tee and straight connector are used for connecting refrigeration hoses, vacuum pumps, refrigerant gauges, etc., enabling proper setup and operation of the digital vacuum gauge in conjunction with other equipment.

SAFETY AND WASTE DISPOSAL

About this document

• This document is an integral part of the instrument.
• Please ensure proper storage of this manual throughout the entire lifespan of the instrument.
• It is essential to utilize the complete original manufacturer’s instruction manual.
• Prior to putting the product into operation, carefully read and familiarize yourself with this user manual.
• Pay particular attention to safety instructions and warning notices to prevent personal injury and damage to the instrument.

General safety instructions

Safety

• Operate the instrument in accordance with its intended use and within the specified parameter range as outlined in the technical datasheet.
• Avoid exerting excessive force when attempting to open the instrument.
• Refrain from operating the instrument if there are any visible signs of damage to the casing, main power source, or connecting cables.
• Adhere to locally recognized safety regulations when conducting measurements, as the test object or measurement environment may present potential risks.
• Avoid storing the product alongside solvents.
• Refrain from using any drying agents.
• Perform instrument maintenance and repair tasks strictly as described in this manual, following the prescribed procedures meticulously.

Waste disposal

• Dispose of faulty rechargeable batteries/waste batteries in accordance with applicable legal regulations.
• At the end of the instrument’s lifespan, appropriately hand over the electronic components of the product to relevant entities for disposal. Please comply with local waste disposal regulations.

TECHNICAL SPECIFICATIONS

SET VALUES FOR ALARM THRESHOLDS

INSTRUMENT DESCRIPTION

Purpose

• The purpose of this instrument is to accurately measure small pressure variations within a vacuum. It is a digital vacuum gauge that allows you to monitor the vacuum evacuation process in precision cooling systems and heat pumps, particularly during the debugging phase.
• By utilizing this instrument, you can obtain real-time pressure readings during the evacuation of the refrigeration system, thereby gathering valuable information about the degree of moisture removal and elimination of contaminants such as oil and external gases.
• The digital vacuum gauge is intended to be used in conjunction with a vacuum pump to create the vacuum environment. It is often paired with refrigerant gauges (analog or digital) to provide comprehensive monitoring of the cooling system.

Overview

Overview of the screen display

Overview of the control buttons

MAINTENANCE

Battery replacement

•  Power off the device.
• Open the battery compartment.
• Remove the existing battery.
• Insert a new battery according to the markings inside the battery compartment.
• Close the battery compartment.

Instrument cleaning

Contaminants such as oil can affect the accuracy of the vacuum sensor. Follow these steps to clean the sensor:

• Prior to cleaning, ensure the device is powered off.
• Apply medical-grade alcohol to both interfaces.
• Gently shake the instrument for a brief period.
• Remove any residual alcohol from the instrument
• Repeat this process at least twice
• Allow the instrument to air dry for a minimum of 1 hour before the next use.

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