Decription
DK
Clean air consists of 21% oxygen, 78% nitrogen and 1% argon. Under indoor air conditions noble gases, carbon monoxide, carbon dioxide (CO2) and mixed gases, so-called volatile organic compounds (VOCs) are also present in various concentrations. In assessing the room air quality with respect to quality, the two latter components are the most important: CO2 because of its historical significance as a guide value in the HVAC industry, and VOCs due to their affect on health and human well-being.
The amount of CO2 is proportional to the human metabolic rate and approximately proportional to the total concentration of VOCs.
![e-57618-10-pide-000]()
Features
Product properties:
- Configurable LED traffic light on the sensor for visual indication of limit values
- Supply voltage via Power-over-Ethernet (PoE)
- Phantom power using data pairs
- Power over unused wire pairs
- Alternate external supply possible
- Monitor temperatures and trends from a browser
- HTML page design user-variable
- Direct access to the actual value, e.g., for integration into other Web pages
- SNMP polling / alarm traps for temperature, relative humidity and air quality values for integrating into your existing SNMP management system
- E-mail for alarm or reporting functions
- Time synchronization via time server calibration
- Adapters:
- 10/100MBit
- Combined temperature/humidity/air quality sensor included
- Easy Start:
- Connect sensor and network cable
- Connect supply voltage
- Assign IP number
- That’s it!
- Application examples:
- Monitor air quality of offices, conference rooms, etc.
- Send alarms when limits are exceeded via e-mail, SNMP trap, TCP client, Syslog
- Logging of the measured values via FTP, Excel file, e-mail attachment, internal memory
- Software interfaces
- HTTP, Web browser
- AJAX, JavaScript and Java applet
- TCP and UDP sockets, client and server
- OPC server
- SMTP (e-mail)
- SNMP (including trap)
- SYSLOG
- FTP (data logging)
- Conforms to standards both in office and industrial environments:
- Increased noise immunity for industrial areas
- Stricter noise emission for residential and commercial areas
- 5 year guarantee
Background information:
Like all models im the Web-IO Climate series, the Web-Graph Air Quality model 57618 includes everything you need for connecting a temperature/relative humidity/ and air quality sensor to the computer network. In addition, the supply voltage per IEEE 802.3af (Power-over-Ethernet) can be provided over the network cable, with both phantom power over the data pairs as well as power using the wire pairs not used for 10/100BT. Problems with outlets, country-specific plug types, various AC voltages etc. are now a thing of the past.
For cases in which PoE is planned but not yet fully implemented, it is also possible to provide power using an external power supply and screw terminals.
Data
Technical data:
| Thermo-Hygro Probe: |
|
I2C connection |
| VOC probe: |
|
I2C connection |
| Network: |
|
10/100BaseT autosensing
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| Power supply: |
|
Power-over-Ethernet (PoE) or via screw terminal with
DC 18V .. 48V (+/-10%) or AC 18Veff .. 30Veff (+/-10%) |
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| Measuring unit |
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| Measuring range: |
|
0°C...85°C, 5..95% rF, 450-2000ppm VOC/CO2 Equivalent |
| Resolution: |
|
1/10 °C, 1/10% rH |
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| VOC sensor, detected substances: |
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• Alcohols
• Aldehydes
• aliphatic hydrocarbons
• Amines
• Aromatic hydrocarbons
• CO, CH4, LPG
• Ketones
• Organic acids |
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| Measuring error: |
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Temperature: |
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typ. @ 25°C ±0.3°C
max. @ 0..50°C ±1.2°C |
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Relative humidity: |
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typ. @ 25°C ±3%rH
max. @ 0..50°C ±7%rH (0-100%rH)
Long-term stability typ. <0.5%rH / year |
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| Measuring frequency: |
|
4s |
| Storage frequency: |
|
1, 5, 15, 60 min |
| Memory depth (832kB): |
|
min. 10 weeks, max. 8 years |
| Deviation of the internal clock: |
|
max. 4.32 min. / month (without time server calibration)
max. 3 sec. (with time server calibration) |
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| Other data |
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| Electrical isolation: |
|
Measurement inputs to network: min. 500 volts |
| E-mail function: |
|
Mail for sending alarms or as reporting function |
| Power supply: |
|
Power-over-Ethernet (PoE) or via screw terminal with
DC 18V .. 48V (+/-10%) or AC 18Veff .. 30Veff (+/-10%) |
| Current consumption: |
|
AVG: 80mA @24VDC, 100mA @20VAC
Max: 90mA @24VDC, 50mA @48VDC
PoE Class 1 (0.44 - 3.84W) |
| Configuration interface: |
|
RS232 serial port, 9600 baud, 8 data bits, 1 stop bit, no parity |
| Housing: |
|
Plastic compact housing, 105x75x22mm |
| Weight: |
|
approx. 200g |
| Ambient storage temperature: |
|
-25..+50°C |
| Ambient operating temperature: |
|
0..+50°C |
| Permissible relative humidity: |
|
0..95% RH (non-condensing) |
| Scope of delivery: |
|
1x Web-Graph Air Quality for DIN rail mount
1x W&T prober, 2m (temperature/relative humidity & VOC)
1x product CD with
WuTility management tool, OPC server, programming examples for VB/Delphi, SNMP-MIB, reference manual in German/English |
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