- low cost intelligent www sensor
APPLICATIONS - online measuring and control of temperature at:
- building HVAC management
- building HVAC automation
- industrial Ethernet
- server rooms
- telecommunication devices
- warehouses
- glasshouses
- manufacturers
- museums, archives, galleries
- air-conditioned rooms
Example of an online monitoring system of Comet Ethernet sensors
| MODES OF COMMUNICATION | |
|---|---|
| Modbus TCP: | Modbus TCP protocol enables to read measured values, set alarm limits, adjust the probe. |
| Telnet: | Port 9999 enables to set alarm limits (lower, upper limits, hysteresis for temperature and time delay), e-mail addresses, SNMP addresses, probe description, refresh of www pages (10s to 65535s), set storing interval to history (10s to 65535s), enable each communication channel. Capacity of the history memory is 600 values. Password protection of this port is enabled. Automatic IP address assignment from DHCP server is also enabled. |
| WWW pages: |
User selectable design of www pages enabling to display curve of measurement history. User can design the look of www pages and temperature history.
Online temperature, humidity, pressure in Roznov, Czech Republic from similar Comet internet www sensor T7511 |
| SNMP: | It is possible to read actual values and alarm limits. In case of alarm creation warning message (trap) is sent to addresses defined by the user (maximum three addresses). |
| SOAP: | Online transmitter enables to send actual measured data in the format of SOAP message to selected web server in preset interval 10-65535 s. In case message is not received by the server till next message is sent, warning trap 1/2 is sent. |
There are the following options of alarm indication:
| ALARM INDICATION OPTIONS | |
|---|---|
| E-mail: | In case of alarm creation warning e-mail message is sent to addresses defined by the user (maximum three addresses) or via e-mail to SMS message. |
| SNMP: | In case of exceeding of adjusted temperature limits alarm is activated and warning trap is sent to user specified IP addresses (maximum 3 addresses). |
| WWW pages: | In case of exceeding of adjusted temperature limits active alarm is displayed on www page. |
| syslog: | Online thermometer enables to send text messages to selected syslog server after different events appear. E.g. after thermometer restart, alarm activation, communication error with SNTP, write to thermometer via mdb, sntp, after firmware change, after alarm termination, after communication error with SOAP server. |
| TECHNICAL PARAMETERS | |
|---|---|
| Supported physical units: | degrees Celsius, degrees Fahrenheit |
| Supported temperature sensors: | Digital temperature sensor Dallas DS18B20 |
| Measuring range: | -55 to +80°C, -30 to +80°C model P8510 |
| Accuracy: | ±0.5°C from -10 to +80°C, ±0.8°C model P8510 |
| Resolution: | 0.1°C |
| Sampling interval: | 2 s |
| Memory capacity for temperature history: | 600 values, export to CSV file enabled |
| Interval for temperature history record: | adjustable from 10 s to 18 h |
| Temperature operating range: | -30 to +80°C |
| Temperature operating range of LCD display: | readable to operating temperature +70°C, it is recommended to switch OFF the LCD over +70°C |
| Protection of the case: | IP30 |
| LAN connection: | RJ-45 connector |
| Power: |
5Vdc, maximum consumption 250mA. For power over Ethernet any PoE splitter is necessary e.g. DWL-P50 from D-Link company |
| Power connector: | co-axial, diameter 5.5 x 2.1 mm |
| Dimensions of the P8510 case: | 88 x 126 x 39,5 mm (W x H x D) |
| Dimensions of the P8511,P8541 case: | 88 x 74 x 39,5 mm (W x H x D) |
| Weight: | 240 g |
| Warranty: | two years |
| Thermometer type | Description | Notes |
|---|---|---|
P8510
|
Thermometer with built-in temperature sensor |
accuracy ±0.8°C measuring range -30 to +80°C |
P8511
|
Single channel thermometer for one DSTGL40/C probe |
accuracy ±0.5°C measuring range -55 to +80°C |
P8541
|
Four channel thermometer for four DSTGL40/C probes |
accuracy ±0.5°C measuring range -55 to +80°C |
Basic Manual
Included accessory:
Traceable calibration certificate from the manufacturer, instruction manual.
Calibration certificate with declared metrological traceability of etalons is based on requirements of EN ISO/IEC 17025 standard.
Example of calibration certificate.
Free program TSensor for configuring of the transmitter is ready to download.
Free program SensorReader for logging values from one thermometer to a PC disk file is ready to download. Program enables to alarm acoustically the PC user if adjusted alarm limits are exceeded. Recorded values in CSV format are easy to process in e.g. Excel. Program can be started several times on a computer at the same time to monitor values from several transmitters.
For acquiring values from several transmitters, third party software is necessary to use. Tested functionality is with programs:
LabVIEW from National Instruments, by means of the free Modbus Library for LabVIEW.
For viewing of actual values and graphs following examples of application were created in LabVIEW 8.5 :
P851x-Ethernet.vi for single channel thermometers P8510, P8511
P8541-Ethernet.vi for quad channel thermometers P8541
TIRS.NET - transmitters are also directly supported by program TIRS.NET from Coral s.r.o. company. Please download demo enabling full work with transmitters.
Tested functionality is also with programs:
ControlWeb,
EasyView.
For record of values to graphs via web interface, project Cacti
www.cacti.net
is available.
| OPTIONAL ACCESSORY | ||
|---|---|---|
|
probes |
DSTGL40/C - temperature probes -30 to +80°C with digital sensor Dallas DS18B20 with the Cinch connector for thermometers P8511, P8541. Stainless steel 17241 with PVC cable of specified length. Diameter 5.7mm, length 40mm. Cable lengths 1,2,5 or 10 meters available. Specify required cable length please. |
|
MD036 | self adhesive Dual Lock for easy installation |
|
A1825 | ac/dc adapter 230V-50Hz/5Vdc |
|
DWLP50 |
DWL-P50 Power over Ethernet (PoE) adapter from company
D-Link.
The adapter is supposed to be connected to Ethernet switch supporting PoE. |
 | Compact Ethernet sensors |  | Precise Ethernet sensors |
 | Ethernet temperature, humidity, pressure sensors with relay outputs |
Declaration of conformity in pdf format