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 engineered to accurately measure hydrogen gas concentration in parts per million (ppm) within a clean air environment, maintaining high precision across a wide range of temperatures and humidity levels.

3.0 Calibration/Compensation

The Hydrogen Leak Detector is calibrated for H₂ sensitivity across varying temperatures. On-board sensors for temperature, humidity, and pressure are utilized to compensate and correct the sensor's output for environmental fluctuations. These measurements are also accessible 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, including hex, socket head cap, and hex flange bolt heads. Ensure mounting bolts are torqued to 8 Nm ±2 Nm.

The sensor should be mounted with the gas entry port facing downwards to prevent water from pooling on the gas membrane or dust from accumulating. Such buildup can impede free gas passage into the sensor. If a downward orientation is not feasible, position the sensor on its side to minimize water or dust collection on the gas membrane.

5.0 Sensor Diagnostics

• 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.

DM3 (J1939-73 Standard)

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

7.0 HLD Outmessages

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

PDU 0XFF10/65296

Data Field Descriptions:

• Temperature: Range (±125°C). Calculation: Temperature (°C) = (int8_t)DegC.
• Humidity: Range (0...100%RH). Calculation: Humidity (%rH) = (uint8_t)RH*0.5.
• Pressure: Range (0.45...1.1 Bar). Calculation: Pressure (Bar) = (uint8_t)Bar*0.004+0.45.
• Hydrogen: Range (-5k...200k ppm). Calculation: Hydrogen (ppm) = (int16_t)PPM*50.

Error Field:

Bit 7: Error Light. An error is set if any fault is active and its corresponding fault Light is "ON". Refer to Table 4.

Counter Field:

Rolling Counter (0-255). Incremented by 1 for every message transmitted. The receiver can track missing messages using this counter.

Example:

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

Figure 1. Product Dimensions (mm)

The sensor housing is roughly rectangular with rounded corners. It features two mounting tabs on the left side, each with a circular hole for bolts. The dimensions are approximately: Overall width 77.5 mm, height 54.56 mm, depth at mounting tabs 21.9 mm. The main sensor body width is 62 mm and height is 44.5 mm. A gas entry port is located on the left side of the main body. The connector is on the bottom, with four pins labeled 1 through 4.

• Overall Width: 77.5 mm
• Main Body Width: 62 mm
• Main Body Height: 44.5 mm
• Height to top of mounting tabs: 72.63 mm
• Height to bottom of connector: 54.56 mm
• Mounting tab hole diameter: 4 x R4.5 ±0.2
• Mounting tab bolt hole spacing: 2x 18.6 mm
• Gas entry port: Located on the left side.
• Connector dimensions: 21.9 ±0.1 mm width, 9.9 -0.15 / +0.10 mm height, 13.05 mm length.

Table 5. Pin Out

8.0 Additional Sensor Installation Notes

• A. Orientation: The H₂ Sensor is not sensitive to orientation. However, it is recommended to point the gas port downwards to prevent fluids from pooling on the membrane. Orienting the gas port on its side is an alternative method to prevent fluid/debris collection on the gas port surface.
• B. CAN Bus Termination: 120 Ohm termination resistors are required on both ends of the CAN Bus.
• C. Flame Suppressor: The sensor is equipped with a Flame Suppressor. This component is designed to contain any internally generated flame/explosion and will not initiate a flame/explosion in the surrounding ambient environment.
• D. Flame Suppressor Integrity: Opening the device or damaging the flame suppressor will compromise the sensor's flame containment performance.
• E. Chemical Sensitivity: The H₂ gas sensor is highly sensitive. Avoid close contact with volatile chemicals, including solvents and other volatile organic compounds such as ketones (acetone), aldehydes (formaldehyde), alcohols (ethanol, methanol, isopropanol), aromatics (toluene), and esters (glycol ester).
• F. Chemical Outgassing: These chemicals are often found in epoxies, glues, and adhesives. They may outgas during baking or curing processes.
• G. Acid Exposure: Minimize or avoid exposure to acids like Hydrochloric, Sulfuric, and Nitric.
• H. Other Chemical Contact: Minimize or avoid contact with chemicals such as Ketenes, Ammonia (NH₃), Hydrogen Peroxide (H₂O₂), and Ozone (O₃).
• I. Service 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 must be returned to the manufacturer via the RMA process.
• K. Ambient Air Composition: The H₂ sensor is configured to operate in ambient air. Standard 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.

For More Information

Honeywell Sensing Solutions provides customer service through a worldwide network of sales offices and distributors. For application assistance, current specifications, pricing, or to locate an Authorized Distributor, please visit the Honeywell 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

Warranty/Remedy

Honeywell warrants its goods to be free from defects in materials and workmanship for the applicable warranty period. The standard Honeywell product warranty applies unless otherwise agreed in writing. Please refer to your order acknowledgment or consult your local sales office for specific warranty details. If warranted goods are returned during the coverage period, Honeywell will, at its option, repair or replace, without charge, items found defective by Honeywell's sole discretion. This is the buyer's sole remedy and is in lieu of all other warranties, expressed or implied, including those of merchantability and fitness for a particular purpose. Honeywell shall not be liable for consequential, special, or indirect damages.

While Honeywell may offer information or engineering support through its personnel, literature, and website, it is the buyer's sole responsibility to determine the suitability of Honeywell products for their requirements.

Specifications are subject to change without notice. The information provided is believed to be accurate at the time of writing, but Honeywell assumes no responsibility for its use.

Warnings

Personal Injury

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

• The information presented 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. ⚠️