HABOTEST HT636 Digital Differential Pressure Manometer User Manual

1. Introduction

The HABOTEST HT636 is a high-precision digital differential pressure manometer designed for accurate and rapid measurement of pressure differences. It features advanced sensing technology to capture even tiny pressure changes, providing intuitive and accurate readings without the inaccuracies common in pointer-type gauges. Its compact and portable design makes it suitable for various on-site inspections and outdoor operations.

HABOTEST HT636 Digital Differential Pressure Manometer highlighting high-precision, quick response, multiple unit options, and compact design. — Figure 1: HABOTEST HT636 Digital Differential Pressure Manometer with key features.

Key Features:

High-precision differential pressure sensor (Accuracy: ±0.3% FS)
Quick response time (0.5 seconds)
Multiple pressure unit options for flexible measurement
Compact and portable design for easy carrying
High-definition backlit LCD display for clear readings in any light
Durable, double injection molded ABS engineering plastic shell
Anti-slip design with concave-convex sides for comfortable grip
Pagoda-shaped connectors for stable and tight hose connections

2. Package Contents

Upon opening the package, please verify that all items listed below are present and in good condition:

1 x HT636 Differential Pressure Manometer
2 x Hoses
1 x User Manual (English description)
1 x Storage Bag
1 x Packing Box

Contents of the HT636 package including the manometer, hoses, user manual, storage bag, and packing. — Figure 2: HT636 Package Contents.

3. Parts and Controls

Familiarize yourself with the different parts and controls of your HT636 manometer:

Diagram of the HT636 manometer showing labeled parts: differential pressure sensor ports, display screen, automatic shutdown/clock setting button, data retention/backlight button, pressure unit switching button, difference measurement/reset button, MAX/MIN/AVG mode selection button, and power switch button. — Figure 3: HT636 Manometer Parts and Controls.

Differential Pressure Sensor Ports: Two ports for connecting hoses to measure positive and negative pressure.
Display Screen: High-definition LCD for displaying measurements and settings.
Power Switch Button (①): Turns the device ON/OFF.
UNIT Button: Switches between multiple pressure units.
SET Button: Used for setting automatic shutdown time/clock.
DIF/ZERO Button: Performs difference measurement or zero clearing.
REC Button: Selects MAX/MIN/AVG mode.
H/* Button: Activates data retention (HOLD) or backlight.

4. Setup

4.1 Battery Installation

The HT636 is powered by 3x1.5V AAA batteries (not included). To install the batteries:

Locate the battery compartment on the back of the device.
Open the battery cover.
Insert three 1.5V AAA batteries, ensuring correct polarity (+/-).
Close the battery cover securely.

Image showing the battery compartment of the HT636 manometer, indicating it uses 3x1.5V AAA batteries. — Figure 4: Battery compartment location.

4.2 Connecting Hoses

The device uses pagoda-shaped connectors for easy and secure hose attachment:

Gently push the provided hoses onto the differential pressure sensor ports.
Ensure the hoses are firmly seated to prevent leaks and ensure accurate readings.

Image illustrating the pagoda-shaped connector and the ease of attaching rubber hoses for multiple pressure units. — Figure 5: Pagoda-shaped connectors for hose attachment.

5. Operation

5.1 Power On/Off

Press the Power Switch Button (①) to turn the device ON.
Press and hold the Power Switch Button (①) to turn the device OFF.

5.2 Unit Switching

Press the UNIT button to cycle through the available pressure units (e.g., PSI, inH2O, mbar, kPa, inHg, mmHg, ozin2, ftH2O, cmH2O, kgcm2, bar, mmH2O).

5.3 Zero Clearing

Before taking a measurement, especially for differential pressure, it is recommended to perform a zero clearing:

Ensure the hoses are disconnected or at ambient pressure.
Press and hold the DIF/ZERO button for more than 2 seconds to reset the instrument display to zero.

5.4 Measurement Modes (MAX/MIN/AVG)

The device supports various measurement modes:

Press the REC button to switch between Maximum (MAX), Minimum (MIN), and Average (AVG) value display modes.

5.5 Data Hold and Backlight

Press the H/* button to activate the Data Hold function, freezing the current reading on the display.
Press the H/* button again to release Data Hold.
Press and hold the H/* button to turn the backlight ON/OFF for improved visibility in low-light conditions.

Image showing the high-definition backlit display and high-quality buttons of the HT636 manometer. — Figure 6: High-definition backlit display and durable buttons.

Icons representing the functions of the HT636: High measurement accuracy, Multi gear conversion, AVG (Average value), MAX/MIN (Maximum/Minimum value), Automatic shutdown, HOLD (Data hold), ZERO (zero clearing), Backlit display screen, 0.5s Quick response. — Figure 7: Function Icons.

Video 1: Product demonstration showcasing high-precision sensing, unit switching, and robust design.

6. Specifications

The following table outlines the technical parameters and accuracy index for the HT636 Differential Pressure Manometer:

Technical Parameter table for HT636, including function, measuring range, accuracy, response time, pressure units, display, zero clearing, usage environment, storage environment, relative humidity, automatic shutdown, power, weight, and size. — Figure 8: HT636 Technical Parameters.

Function	HT636
Measuring Range	±5PSI
Can withstand maximum pressure	10PSI
Accuracy	±0.3%FS
Accuracy Index	Applicable to temperatures 18°C to 28°C, relative humidity not exceeding 80%, and a one-year warranty period.
Repeatability	±0.2%(max±0.5%FS)
Linear/Posterior	±0.29%FS
Response time	0.5S
Pressure Unit	inH2O; PSI; mbar; kPa; inHg; mmHg; ozin²; ftH2O; cmH2O; kgcm²; bar; mmH2O
Display	LCD display
Measurement value	Measurement of maximum, minimum, and average values
Under voltage prompt	Display the symbol '⚠'
Zero clearing	When the hose is open to the surrounding environment, press and hold the "ZERO" button for more than 2 seconds to reset the instrument display to zero.
Usage environment	0°C to 50°C
Storage environment	−10°C to 60°C
Relative humidity	Non condensing (<10°C) 90% Relative humidity (10°C to 30°C) 75% Relative humidity (30°C to 40°C) 45% Relative humidity (40°C to 50°C) (without condensation)
Automatic shutdown	You can set the automatic shutdown time (5-60 minutes)
Power	3x1.5V AAA battery (Battery is not included in the package)
Weight	Approximately: 134g
Size	152 x 60 x 31mm

Accuracy Index table for HT636, detailing measuring range, maximum pressure, accuracy, repeatability, linearity, response time, and resolution for various units. — Figure 9: HT636 Accuracy Index.

7. Applications

The HT636 Differential Pressure Manometer is suitable for a wide range of applications due to its precision and versatility:

Aseptic cleanrooms
General cleanrooms
Ventilation systems
Natural gas pipelines
HVAC system diagnostics
Industrial process control
Laboratory measurements

Image showing various applications for the HT636 manometer, including aseptic cleanrooms, clean rooms, ventilation systems, and natural gas pipelines. — Figure 10: Widely Used Scenarios.

8. Maintenance

8.1 General Care

Keep the device clean and dry. Use a soft, damp cloth to wipe the exterior. Do not use abrasive cleaners or solvents.
Store the device in its protective storage bag when not in use to prevent damage.
Avoid exposing the device to extreme temperatures, high humidity, or direct sunlight for prolonged periods.
Do not drop or subject the device to strong impacts. The double injection molded shell provides durability, but excessive force can still cause damage.

8.2 Battery Replacement

When the low voltage symbol ('⚠') appears on the display, replace the batteries promptly to ensure accurate readings and continuous operation. Refer to Section 4.1 for battery installation instructions.

9. Troubleshooting

If you encounter issues with your HT636 manometer, try the following troubleshooting steps:

Device does not power on: Check if the batteries are installed correctly and have sufficient charge. Replace with new batteries if necessary.
Inaccurate readings: Ensure the hoses are securely connected and not kinked. Perform a zero clearing (Section 5.3) before measurement. Verify that the measurement environment is within the specified operating temperature and humidity ranges.
Display is dim or unreadable: Activate the backlight (Section 5.5). If the issue persists, check battery charge.
Unit not switching: Ensure you are pressing the UNIT button firmly. If unresponsive, try restarting the device.

If the problem persists after attempting these steps, please contact customer support for further assistance.

10. User Tips

Always perform a zero clearing before critical measurements to ensure the highest accuracy.
Utilize the data hold function (H/* button) when taking readings in hard-to-reach areas or for recording stable values.
Take advantage of the multiple pressure units by switching to the most appropriate unit for your specific application using the UNIT button.
For prolonged use, consider carrying spare AAA batteries, especially for outdoor or remote work.
The compact size and included storage bag make it easy to transport; always use the bag to protect the device from dust and physical damage.

11. Warranty and Support

The HABOTEST HT636 Differential Pressure Manometer comes with a one-year warranty period, applicable under normal usage conditions and within the specified accuracy index temperature and humidity ranges (18°C to 28°C, relative humidity not exceeding 80%). For technical support, warranty claims, or service inquiries, please contact your retailer or the manufacturer directly. Keep your purchase receipt as proof of purchase.

ZOYI HT636