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Delta OHM
CO & CO2 Indoor Air Quality DeltaOHM

CO & CO2 Indoor Air Quality DeltaOHM

Product catalog summary

Overview: The document outlines technical specifications and applications for air quality monitoring instruments, focusing on measuring CO, CO2, temperature, humidity, and related parameters, primarily for indoor air quality (IAQ) assessments.

Instrument Specifications:

HD37AB1347 IAQ Monitor: Measures CO2, CO, temperature, relative humidity, and calculates dew point and atmospheric pressure. It features a large display and complies with ASHRAE 62.1-2004 standards.
Data Logger: Stores 67,600 presets per input with logging intervals from 15 seconds to 1 hour.
Probes: Connects to various probes, including SICRAM modules for CO2, CO, temperature, and humidity measurements.

Technical Specifications:

CO2 Sensor: NDIR dual wavelength, range 0-5000 ppm, accuracy ±50 ppm + 3% of measurement.
CO Sensor: Electrochemical cell, range 0-500 ppm, accuracy ±3 ppm + 3% of measurement.
Humidity Sensor: Capacitive, range 0-100% RH, accuracy ±2% (10-90% RH).
Temperature Sensor: NTC 10kΩ, range -20 to +60°C, accuracy ±0.2°C.
Atmospheric Pressure Sensor: Piezo-resistive, range 750-1100 hPa, accuracy ±1.5 hPa.

Applications:

Monitoring IAQ in schools, offices, and factories.
Analyzing sick building syndrome.
Verifying HVAC systems.
Conducting audits in building automation.

Additional Features:

Probes for air speed measurement using hot-wire and vane methods.
Temperature probes for various applications, including immersion, penetration, and contact measurements.

Purchasing Information: Lists various models and specifications, including dimensions and cable lengths for different probes and sensors.

Calibration Procedure: Calibration involves setting the sensor offset to approximately 400ppm in clean air or 0ppm using nitrogen bottles. The instrument recognizes the calibration method automatically. Calibration should be performed at one point only, as each new calibration cancels the previous one.

Installation Notes: CO2 transmitters should consider factors like convection, diffusion, and forced air movement. Wall-mounted models should be installed with good air circulation, away from doors and windows, at least 1.5 meters above the floor. Duct models require specific installation orientations and fittings.

Electrical Connections: Requires a power supply as indicated in the technical specifications. Analog outputs vary by model, with connections for CO2 and temperature transmitters. Digital outputs can control external devices, with protection diodes recommended.

Product Specifications: Various models are available with different CO2 measurement ranges, output types, and installation configurations. Models include wall-mounted and duct versions, with options for separate air inlets and different analog outputs.

Technical Data: Sensors measure relative humidity, ambient temperature, carbon dioxide, and dew point temperature. Instruments use capacitive sensors for humidity and NTC sensors for temperature, with dual wavelength NDIR technology for CO2.

HD45 and HD46 Series Overview: Provides technical specifications and configurations for humidity, temperature, and CO2 transmitters designed for air quality monitoring.

Specifications:

Sampling and Storage: Data collected every 3 seconds and stored as average values over selectable intervals.
Outputs: Includes serial (USB and RS485 MODBUS-RTU), analog (0-10Vdc), and relay outputs.
Power Supply: Operates on 24Vac ± 10% or 15-35Vdc with a power consumption of 100 mW.
Environmental Conditions: Operating temperature range is 0°C to 50°C, and humidity range is 5%RH to 90%RH without condensation.

Models and Options:

HD45 Series: Models for humidity and temperature, temperature and CO2, and CO2 only.
HD46 Series: Models for humidity, temperature, and CO2, and humidity and temperature.
Output Options: Configurable with analog outputs, RS485 outputs, relay outputs, or combinations thereof.
Display Options: Available with or without LCD displays and keyboards.

Installation and Configuration:

Installation: Designed for easy access to terminal block connections and fixing holes.
Configuration: Configurable via USB connection using RS45 or RS45I cables.

Accessories:

DeltaLog14 Software: Used for instrument configuration and data download.
RS45 and RS45I Cables: Provide serial connection with built-in adapters for USB and mini-USB ports.
HDM46: Replacement module for humidity and temperature calibration.

Catalog excerpts

Portable instruments for measuring humidity, air velocity, barometric pressure, temperature, CO and CO2 Data logger CO, CO2, temperature and humidity Transmitters CO2, CO2 and temperature Wall mounting CO2 Transmitters, Humidity and Temperature for Building Automation The qualitative level of our instruments is the result of a continuous evolving of the product itself. This may bring to slight differences between what written in the following manual and the instrument you bought. We cannot completely exclude the presence of errors inside the manual, which we apologise for. Data, images and descriptions included in this manual cannot be enforced legally. We reserve the right to perform modifications and corrections at any time without notice.

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Example of an immediate printout obtained using the HD40.1 printer Instrument model Instrument firmware version Instrument firmware date Instrument serial number Identification Code Description of the probe connected to input 1 Description of the probe connected to input 2 Date and time Carbon Dioxide Carbon Monoxide Relative Humidity Temperature Atmospheric Pressure Air Speed HD37AB1347 Indoor Air Quality Monitor HD37AB1347 IAQ Monitor is a tool manufactured by Delta Ohm for the analysis of air quality (Indoor Air Quality, IAQ). The instrument simultaneously measures several parameters: Carbon...

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Memory Storage capacity Logging interval Divided into 64 blocks. 67600 recordings per each of the 2 inputs. Selectable among: 15, 30 seconds, 1, 2, 5, 10, 15, 20, 30 minutes and 1 hour. Relative humidity and temperature probes using SICRAM module Application range Temp. sensor Logging interval Storage capacity Logging interval Storage capacity About 11 days and 17 hours About 1 year and 104 days About 23 days and 11 hours About 1 year and 339 days About 46 days and 22 hours About 2 years and 208 days About 93 days and 21 hours About 3 years and 313 days About 234 days and 17 hours About 7 years...

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Hot-Wire Air Speed measurement probes with SICRAM module: AP471 S1 - AP471 S2 - AP471 S3 - AP471 S4 Type of measurements Type of sensor Speed Temperature Measurement range Speed Temperature Measurement resolution Temperature Measurement accuracy Speed ±0.1 m/s (0…0.99 m/s) ±0.05m/s (0…0.99 m/s) ±0.3 m/s (1.00…9.99 m/s) ±0.15m/s (1.00…5.00 m/s) ±0.8 m/s (10.00…40.0 m/s) Temperature ±0.8°C (-10…+80°C) ±0.8°C (-10…+80°C) Minimum speed 0.1 m/s Air temperature compensation 0…80°C Sensor working conditions Clean air, RH<80 % Approx. 20 hours @ 20 m/s Approx. 30 hours @ 5 m/s Battery life with alkaline...

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Temperature MEASUREMENT PROBES EQUIPPED with SICRAM module TP472I: Pt100 sensor immersion probe. Stem Ø 3 mm, length 300 mm. Cable 2 meters long. TP472I.0: Pt100 sensor immersion probe. Stem Ø 3 mm, length 230 mm. Cable 2 meters long. TP473P: Pt100 sensor penetration probe. Stem Ø 4 mm, length 150 mm. Cable 2 meters long. TP473P.0: Pt100 sensor penetration probe. Stem Ø 4 mm, length 150 mm. Cable 2 meters long. TP474C: Pt100 sensor contact probe. Stem Ø 4 mm, length 230 mm, contact surface Ø 5 mm. Cable 2 meters long. TP474C.0: Pt100 sensor contact probe. Stem Ø 4 mm, length 230 mm, contact surface...

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Using appropriate procedure, the Software DeltaLog13 can evaluate the parameter % OA (percentage of external air), according to the following formula: whereas: Xr = CO2 in return air Xs = CO2 in the outlet air X0 = CO2 in the external air The power supply of the instrument is provided by a 2 Ni-MH rechargeable batteries package (code BAT-20), that that allows 8 hours of continuous working in acquisition mode. Acquisition frequency: frequency 3 sec. 6 sec. 12 sec. 15 sec. 30 sec. 60 sec. = 1 minutes 120 sec. = 2 minutes 180 sec. = 3 minutes 240 sec. = 4 minutes 300 sec. = 5 minutes samples per...

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selectable within: 3,6,12,15,30,60 seconds, 2,3,4,5 minutes. The stored values represent the average value of the samples that are stored every three seconds. selectable within: 3,6,12,15,30,60 seconds, 2,3,4,5 minutes. The printed values represent the average value of the samples that are stored every three seconds. Sensor Features Relative Humidity RH Capacitive sensor Sensor protection Net filter made of stainless steel (upon request filter P6 in AISI316 sintered 20µm or filter P7 in PTFE sintered 10µm) Measurement range 5...100 % RH Sensor working range -20...+60°C Accuracy ±2% (10÷90%RH)...

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the extent ventilation duet – TC Version, In versions with power flow channel and separate electronics, the air is drawn into the measurement chamber. The same flow then returns to the channel through a second tube. The air flow needs to be at least 1m/s. To fix the air inlet to the duct, you can use the HD9008.31 flange, a 3/8” universal biconical fitting or a PG16 metallic fairlead with a Ø 14 mm internal diameter. The air inlets connected to the transmitter by means of flexible tubes are attached to the channels flowing air: we supply air inlets for square or rectangular ducts (code HD3719)...

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Calibration The instruments are calibrated at the factory and do not usually require further action by the user. However, it is possible to perform a new calibration that corrects the sensor offset: • (approx. 400ppm) in clean air • to 0ppm with nitrogen bottles (code MINICAN.20A). The instrument is able to recognize automatically the calibration methods used: whether 400ppm or 0ppm. The calibration should be performed one point only: each new calibration cancels the previous one. Installation Notes The choice of the number of CO2 transmitters to be used in a typical installation and location,...

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Flat wall duct probe HD3719 Circular wall duct probe HD3721 Digital Output The diagram shows an example of application for a digital output that controls, in this case, an external relay coil. When exceeding the alert threshold (1500ppm), the relay contact closes and activates an adjustment device. (*) Warning: Protect the digital output by applying a protection diode as shown in the figure. Do not exceed the maximum reverse voltage and power limits indicated in the technical information. HD37BTV / HD377BTV sizes Flow Input The duct air inlet should be oriented so that the flow enters from the...

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CO & CO2 Indoor Air Quality DeltaOHM

CO & CO2 Indoor Air Quality DeltaOHM

Catalog excerpts

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