AUTOOL PT503 Mini Differential Pressure Gauge - User Manual

Copyright Information

All rights reserved by AUTOOL TECH. CO., LTD. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission from AUTOOL. The information is for the use of this unit only. AUTOOL is not responsible for its application to other units. AUTOOL and its affiliates are not liable for damages, losses, costs, or expenses incurred by the purchaser or third parties due to accident, misuse, abuse, unauthorized modifications, repairs, alterations, or failure to comply with AUTOOL operating and maintenance instructions. AUTOOL is not liable for damages arising from the use of non-AUTOOL designated options or consumable products. Other product names are for identification purposes only and may be trademarks of their respective owners. AUTOOL disclaims rights in those marks.

Trademark

Trademarks, registered trademarks, service marks, domain names, logos, and company names used in this manual are the property of AUTOOL or its affiliates. In countries where they are not registered, AUTOOL claims rights associated with unregistered marks. Other product/company names may be trademarks of their respective owners. Use of AUTOOL or third-party marks requires permission from the owner.

For permission to use materials or for other questions, contact AUTOOL at https://www.autooltech.com or aftersale@autooltech.com.

Safety Rules

General Safety Rules

• Always keep this user manual with the machine.
• Before using, read all operational instructions. Failure to comply may result in electric shock and skin/eye irritation.
• Each user is responsible for installation and use according to this manual. The supplier is not responsible for damage from improper use.
• Only operated by trained and qualified personnel. Do not operate under the influence of drugs, alcohol, or medication.
• This machine is for specific applications; modification or use for unintended purposes is strictly prohibited.
• The supplier assumes no warranties or liabilities for personal injury or property damage caused by improper use, misuse, or failure to follow safety instructions.
• Intended for professionals only. Improper use by non-professionals may cause injury or damage.
• Keep out of reach of children.
• Ensure nearby personnel or animals maintain a safe distance. Avoid working in rain, water, or damp environments. Keep the work area well-ventilated, dry, clean, and bright.

Handling

• Used/damaged devices must not be disposed of in household waste. Dispose of them in an environmentally friendly manner using designated electrical equipment collection points.
• Used recycling oil and batteries should be treated as hazardous waste.

Electrical Safety Rules

• If the device has not been used for a long time or the battery is depleted, it may not turn on properly. Replace the battery before attempting to power on.

Equipment Safety Rules

• Never leave the device unattended while powered on. Always turn off at the main switch when not in use.
• Do not attempt to repair the equipment yourself.
• Before connecting to power, check if the power supply voltage matches rated parameters. Mismatched voltage can cause hazards and damage.
• Protect the equipment from rainwater, moisture, mechanical damage, overload, and rough handling.

Application

• Before use, check the battery, hoses, and adapters for damage. Do not operate if damaged.
• Use the equipment only in compliance with safety instructions, technical documents, and vehicle manufacturer specifications.
• When replacing the power battery, use only a brand-new, unopened product of the correct type.

Personnel Protection Safety Rules

• The oil in the system can be harmful; avoid contact.
• Always wear safety goggles ? to prevent splashing into eyes. If contact occurs, rinse eyes with flowing water for several minutes with eyelids open. Consult a doctor if symptoms persist.
• Always wear protective gloves ? to avoid skin contact with oil. If skin contact occurs, wash immediately with soap and water. Remove contaminated clothing/footwear immediately.
• If swallowed, seek medical advice immediately.
• Ensure stable footing to safely control equipment in emergencies.

Precautions

Warnings

• Before use, check the gauge's appearance and ensure the display functions correctly when powered on.
• If the battery indicator flashes or is unstable, the battery is low and needs replacement.
• Keep away from vibration and strong magnetic fields. Avoid using in environments with rapid temperature changes.
• During measurement, do not compress the silicone tube to ensure proper air pressure transmission to the sensor.
• Do not exceed the maximum measurement range to prevent overload and damage. The pressure limit is 200 kPa; do not exceed this value during measurement.

Technical Specifications

Product Structure

Interface Display

The interface display shows:

• Data Lock ?
• Real-time Pressure (large numerical display)
• Differential Pressure (-AP) (large numerical display)
• Positive Pressure Port and Negative Pressure Port connections.
• Units available: psi, inHg, kPa, mbar, mmHg.
• Backlight ? indicator.
• Battery Level ? indicator.
• Unit Display showing the current measurement unit.

Structure Diagram

The diagram illustrates the AUTOOL PT503 device. Key components are labeled:

• A: Pressure Interface
• B: Pressure Interface
• C: LCD Display
• D: Power Switch / Backlight Button. Long press to power on/off; short press to toggle backlight.
• E: Unit Switch / Lock Button. Long press to enter/exit unit switch mode, press again to switch units; short press to toggle data lock on/off.

Operating Steps

Battery Installation Steps

• Open the battery cover on the back of the device.
• Insert 2*1.5V AAA batteries, ensuring correct polarity.
• Close and secure the battery cover.

Basic Operating Instructions

• Connection Method: Connect the instrument to the included hose, then choose the appropriate adapter to connect to the measurement device.
• Unit Settings: Long press the [UNIT] button to enter unit switch mode. Press [UNIT] again to select the desired unit (6 units available). Long press [UNIT] to return to the homepage.
• Lighting Selection: Press the [?] button to toggle the backlight on/off.
• Data Lock: Press the [?] button to lock the data display, preventing changes. A lock icon will appear on the screen.
• Data Unlocking: Press the [?] button while data is locked to restore the normal display; the lock icon will disappear.
• The device automatically powers off after 5 minutes of inactivity or no pressure.

Operating Process

• Long press the [?] button for 3 seconds to power on and enter the main screen.
• The device automatically zeros and performs atmospheric pressure calibration upon startup. Note: Do not power on under pressure, as it will lead to inaccurate measurements.
• Connect the included hose to the device's pressure interface.
• Select the appropriate adapter and connect it to the pipeline whose pressure needs to be measured.

Maintenance Service

AUTOOL products are made of long-lasting materials and undergo rigorous production processes and quality controls, ensuring excellent quality and performance. Regular maintenance is recommended for stable operation.

Maintenance

• Avoid rubbing the product against rough surfaces, especially the metal housing.
• Regularly check and tighten connections.
• External and internal parts in contact with chemical media should be treated with anti-corrosion measures (e.g., rust removal, painting) to improve corrosion resistance and extend service life.
• Comply with safety procedures; do not overload the equipment. Ensure safety guards are functional. Eliminate unsafe factors promptly. Inspect the circuit and replace aging wires.
• Store the product in a dry place when not in use. Avoid hot, humid, or non-ventilated locations.

Warranty

The AUTOOL machine has a 3-year warranty for the main unit and a 1-year warranty for accessories, starting from the date of receipt by the customer.

Warranty Access

• Repair or replacement is determined by the product's breakdown situation.
• AUTOOL guarantees that all replaced parts, accessories, or devices are brand new.
• If the product fails within 90 days of receipt, AUTOOL will cover shipping costs and provide replacement accessories.
• If the product fails after 90 days, the customer will bear the appropriate costs, and AUTOOL will provide parts for replacement free of charge.

Conditions Not Covered by Warranty

• Products purchased through unofficial or unauthorized channels.
• Product breakdown due to failure to follow product instructions for use or maintenance.

AUTOOL prides itself on superb design and excellent service. Further support or services are available.

Disclaimer

All information, illustrations, and specifications in this manual are based on the latest information available at the time of publication. AUTOOL reserves the right to modify the manual and the machine without prior notice. Physical appearance and color may differ from the manual; refer to the actual product. While every effort has been made to ensure accuracy, inaccuracies may exist. For doubts, contact your dealer or AUTOOL after-service center. AUTOOL is not responsible for consequences arising from misunderstandings.

Return & Exchange Service

If you are not satisfied with AUTOOL products purchased from authorized online or offline channels, you may return them within seven days of receipt or exchange them for an equivalent product within 30 days of delivery, according to global AUTOOL sales terms.

• Returned and exchanged products must be in fully saleable condition, accompanied by proof of sale, all relevant accessories, and original packaging.
• AUTOOL will inspect returned items to ensure they are in good condition and meet conditions. Items failing inspection will be returned to you without refund.
• Exchanges can be made through the customer service center or authorized AUTOOL distributors. The principle is to return to the place of purchase. For difficulties with returns or exchanges, contact AUTOOL Customer Service.

Contact Information