Installation Instructions for the HLD Series Hydrogen Leak Detector

1.0 General Information

The Honeywell Hydrogen Leak Detector is a thermal conductivity-based hydrogen gas sensor offering high reliability, stability, and resistance to chemical poisoning. It is designed for detecting hydrogen leakage in various applications.

2.0 Use of the Hydrogen Leak Detector Sensor

The Honeywell Hydrogen Leak Detector is designed to provide ppm-level hydrogen gas readings in a clean air environment with high accuracy across a wide range of temperatures and humidity.

3.0 Calibration/Compensation

The Hydrogen Leak Detector is calibrated for H₂ sensitivity over temperature. On-board temperature, humidity, and pressure sensors are used to compensate/correct the sensor output for environmental changes. These measurements are also available via the CANbus message.

4.0 Installation

Mount the sensor using two mounting bushings and two grade 8.8 M6 bolts. The mounting tabs accommodate various bolt head styles. Torque mounting bolts to 8 Nm ±2 Nm.

The sensor should be mounted with the gas entry port pointed downwards to prevent water pooling on the gas membrane or dust collection. If downward orientation is impossible, position the sensor on its side to minimize water or dust collection on the membrane.

5.0 Sensor Diagnostics

The sensor provides diagnostic information, including:

• Voltage Outside Operating Range (High/Low)
• H₂ Sensor Error
• Temperature Outside Operating Range (High/Low)
• Humidity High Error
• Pressure Outside Operating Range (High/Low)

Table 1. Specifications

Table 2. Installation Specifications

6.0 Faults

6.1 Fault IDs

Severity Level options: Protect, Warning, Replace, Stop Now. Light Options: Off, On. Flash Options: Slow, Fast, NoFlash.

Table 3. Serviced Fault from Boot Block

Table 4. Serviced Faults Added to Applications

Faults are reported immediately when triggered using DM1. Faults shall report every 1 second while active. Once all faults are removed/recovered, sensors stop transmitting the DM1 message.

6.2 Fault Messages

DM1 (J1939-73 Standard)

The DM1 message reports error characteristics: Severity, Light, Flash, and FMI are used to describe the error. The DTC identifies the exact error, and occurrence reports how many times it has occurred.

PDU 0XFECA/65226

DM3 (J1939-73 Standard)

The DM3 message is used to clear stored and active DTCs.

PDU 0XFECC/65228

7.0 HLD Outmessages

• CAN Identifier per J1939
• Baud Rate: 250 kbps or 500 kbps
• 120 Ohm termination resistors required on both ends of BUS

PDU 0XFF10/65296

Temperature: ±125°C. Temperature (°C) = (int8_t)DegC

Humidity: 0...100%RH. Humidity (%rH) = (uint8_t)RH*0.5

Pressure: 0.45...1.1 Bar. Pressure (Bar) = (uint8_t)Bar*0.004+0.45

Hydrogen: -5k...200k ppm. Hydrogen (ppm) = (int16_t)PPM*50

Error: Bit 7: Error Light. Error is set if any fault is set and the corresponding fault Light is "ON". Refer to Table 4.

Counter: Rolling Counter (0-255). Counter is incremented by 1 for every message transmitted. The receiver could track for missing messages through the counter.

Example: Broadcast Normal Operation at 23°C (0x17h=23d), 55% Rh(0x6E), 0.970Bar (0x82), 1800ppm (0x0024), one or more Faults are set.

ID: 8FF10E4x Data: 17 6E 82 24 00 01 74 FF

Figure 1. Product Dimensions (mm)

Diagram showing the physical dimensions of the HLD Series Hydrogen Leak Detector. Key dimensions include overall height, width, depth, and mounting hole spacing. It also indicates the gas entry port.

Table 5. Pin Out

8.0 Additional Sensor Installation Notes

• A. Orientation: While the H₂ sensor is not sensitive to orientation, the gas port should be pointed downwards to prevent fluid pooling on the membrane. Orienting the gas port on its side is an alternative to prevent fluid/debris collection on the gas port surface.
• B. CAN Bus: 120 Ohm termination resistors are required on both ends of the CAN Bus.
• C. Flame Suppressor: The sensor is assembled with a Flame Suppressor, intended to contain any internally generated flame/explosion and will not initiate a flame/explosion in surrounding ambient environments.
• D. Damage: Opening the device or damaging the flame suppressor will eliminate the flame containment performance of this sensor.
• E. Chemical Contact: The H₂ gas sensor is highly sensitive. Avoid close contact with volatile chemicals such as solvents, ketones (acetone), aldehydes (formaldehyde), alcohols (ethanol, methanol, isopropanol), and aromatic compounds (toluene), glycol esters.
• F. Chemical Sources: These chemicals are often components of epoxies, glues, and adhesives, which can outgas during baking/curing.
• G. Acid Exposure: Minimize or avoid exposure to acids like Hydrochloric, Sulfuric, and Nitric.
• H. Other Chemical Contact: Minimize or avoid contact with Ketenes, Ammonia (NH₃), Hydrogen Peroxide (H₂O₂), and Ozone (O₃).
• I. Temperature Range: The H₂ sensor has been evaluated for a service temperature range of -40°C to 85°C.
• J. Repairability: H₂ sensors are not repairable. Faulty products should be returned to the manufacturer via the RMA process.
• K. Ambient Air Composition: The H₂ sensor is configured to work in ambient air. Nominal ambient air composition includes: Nitrogen (78.084%), O₂ (20.946%), Argon (0.0934%), Carbon Dioxide (0.036%).
• L. Composition Deviation: Sensor output will be affected if the ambient air composition deviates from its nominal composition.

Warranty/Remedy

Honeywell warrants its goods to be free of defective materials and faulty workmanship during the applicable warranty period. The standard product warranty applies unless otherwise agreed in writing. Honeywell will repair or replace, at its option, defective items found by Honeywell's sole discretion. This is the buyer's sole remedy and is in lieu of all other warranties, expressed or implied, including merchantability and fitness for a particular purpose. Honeywell shall not be liable for consequential, special, or indirect damages.

While Honeywell may provide information or engineering support, the buyer is solely responsible for determining the suitability of Honeywell products for their requirements. Specifications are subject to change without notice.

Warnings

Personal Injury

WARNING: DO NOT USE these products as safety or emergency stop devices, or in any application where product failure could result in personal injury. Failure to comply with these instructions could result in death or serious injury.

Misuse of Documentation

WARNING: The information in this product sheet is for reference only. Do not use this document as a product installation guide. Complete installation, operation, and maintenance information is provided in the instructions supplied with each product. Failure to comply with these instructions could result in death or serious injury.

For More Information

Honeywell Sensing Solutions provides worldwide support through its network of sales offices and distributors. For application assistance, current specifications, pricing, or the nearest Authorized Distributor, visit the website or call:

• USA/Canada: +1 302 613 4491
• Latin America: +1 305 805 8188
• Europe: +44 1344 238258
• Japan: +81 (0) 3-6730-7152
• Singapore: +65 6355 2828
• Greater China: +86 4006396841

Honeywell Sensing Solutions
830 East Arapaho Road
Richardson, TX 75081
www.honeywell.com