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 with high reliability, high stability, and resistance to chemical poisoning for use in the detection of hydrogen leakage in different applications.

2.0 Use of the Hydrogen Leak Detector Sensor

The Honeywell Hydrogen Leak Detector is designed to provide the ppm level of hydrogen gas present in a clean air environment with high accuracy over a wide range of temperature 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 sensor output for environmental changes. The temperature, humidity, and pressure measurements are also available over 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, such as hex, socket head cap, and hex flange bolt head. Torque mounting bolts to 8 Nm ±2 Nm.

The sensor should be mounted with the gas entry port pointed downwards to prevent water from pooling on the gas membrane, or dust collecting on the membrane. A buildup of liquid, water, and dust on the membrane could inhibit free gas passage into the sensor. If a downward gas port orientation is impossible, the sensor could be positioned on its side to minimize water or dust collection on the gas membrane.

5.0 Sensor Diagnostics

1. Voltage Outside Operating Range (High/Low)
2. H₂ Sensor Error
3. Temperature Outside Operating Range (High/Low)
4. Humidity High Error
5. Pressure Outside Operating Range (High/Low)

Table 1. Specifications

Table 2. Installation Specifications

6.0 Faults

6.1 Fault IDs

• Severity Level options are: Protect, Warning, Replace, Stop Now
• Light Options are: Off, On
• Flash Options are: 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 the error characteristics. Severity, Light, Flash, and FMI are used to describe how 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 of the fault is set and the corresponding fault Light is "ON", refer 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.

Figure 1. Product Dimensions (mm)

Shows the physical dimensions of the HLD sensor. Key dimensions include overall width of 77.5 mm, height of 54.56 mm, and depth of 72.63 mm. It indicates a gas entry port and mounting holes with a diameter of 4x R4.5 ±0.2 mm. The connector is shown with pin assignments.

Table 5. Pin Out

8.0 Additional Sensor Installation Notes

• The H₂ Sensor is not sensitive to orientation. However, the gas port should be pointed downwards to prevent fluids pooling on the membrane. Orienting the Gas port on its side is another way to prevent fluids/debris collection on the gas port surface.
• 120 Ohm termination resistor required on both ends of the CAN Bus.
• Sensor is assembled with a Flame Suppressor. The flame suppressor is intended to contain any internally generated flame/explosion and will not initiate a flame/explosion in surrounding ambient environment.
• Opening of the device/damage to the flame suppressor will eliminate the flame containment performance of this sensor.
• The H₂ gas sensor is a highly sensitive device. Close contact with volatile chemicals (solvents and other volatile organic compounds – ketones (acetone), aldehydes (formaldehyde), alcohols (ethanol, methanol, isopropanol), aromatic (toluene), esters (glycol ester)) must be avoided.
• These chemicals are often a component of epoxies, glues, and adhesives. These chemicals could be outgassed during baking/curing.
• Exposure to acids (Hydrochloric, Sulfuric, Nitric) must be minimized or avoided.
• Contact with other chemicals such as Ketenes, Ammonia (NH₃), Hydrogen Peroxide (H₂O₂), and Ozone (O₃) should be minimized/avoided.
• The H₂ sensor has been evaluated for a service temperature range of -40°C to 85°C.
• H₂ sensors are not repairable. Faulty products should be returned to the manufacturer via the RMA process.
• H₂ sensor is configured to work in ambient air. Ambient air composition should be comprised of:
  • Nitrogen: 78.084%
  • O₂: 20.946%
  • Argon: 0.0934%
  • Carbon Dioxide: 0.036%
• Sensor output will be affected if the composition of the ambient air deviates from its nominal composition.

For More Information

Honeywell Sensing Solutions services its customers through a worldwide network of sales offices and distributors. For application assistance, current specifications, pricing, or the nearest Authorized Distributor, visit our 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 goods of its manufacture as being free of defective materials and faulty workmanship during the applicable warranty period. The Honeywell standard product warranty applies unless agreed to otherwise by Honeywell in writing; please refer to your order acknowledgment or consult your local sales office for specific warranty details. If warranted goods are returned to Honeywell during the period of coverage, Honeywell will repair or replace, at its option, without charge those items that Honeywell, in its sole discretion, finds defective. The foregoing is 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. In no event shall Honeywell be liable for consequential, special, or indirect damages.

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

Specifications may change without notice. The information we supply is believed to be accurate as of this writing. However, Honeywell assumes no responsibility for its use.

Warnings

Personal Injury

DO NOT USE these products as safety or emergency stop devices or in any other application where failure of the product 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.