Didactum has already equipped various research laboratories with a realtime temperature monitoring solutions. For this, we offer the IP capable thermocouple converter. A suitable thermocouple sensor is connected to this IP-capable converter unit. In your case a NiCr-CuNi thermocouple sensor with a temperature measuring range suitable for freezers from -200 to + 50 ° Celsius. Didactum offers this special thermocouple temperature sensor for research and laboratories on request.

The thermocouple converter is connected to the 1-wire module of an networked remote measuring and control unit of the series 50/100/200/300/400/500/600/700. You can configure the thermocouple temperature sensor individually in the multilingual web interface of the measuring and control device. The real-time temperature values measured by the thermocouple (freezer) sensor are stored in the data logger of the measuring and control system. This measurement data can be visualized directly in the web interface. With a simple click of your mouse, this measurement data is exported in XML or CSV data format and processed with suitable software, e.g. Microsoft Excel.

Since every Didactum system is fully SNMPv1-, SNMPv2c- and SNMPv3- compatible, the temperature data can also be remotely transmitted to laboratory software or measurement data tools via TCP / IP network. If desired, the thermocouple sensor connected to the thermocouple converter unit can also be queried directly via SNMP (Simple Network Management Protocol). In addition, each measuring and control system from manufacturer Didactum can report critical temperatures in the laboratory refrigerator to the responsible employees by email and / or SMS (via LTE or GSM modem).

The audiovisual alerting of critical (laboratory) refrigerator temperature by means of the siren with built-in flashing light is also very interesting. Optionally, the critical state can also be sent to the alarm system or building technology. All events are recorded in the syslog of the web-enabled measuring and monitoring device - including date and time stamp.

The capacity of the internal data logger depends on the total number of sensors and the query interval (real-time measurement / measurement every minute). This can be set in the multilingual web interface. You can export the measurement data manually by mouse click (CSV / XML file format) or also in intervals e.g. via e-mail or FTP upload. By simply connecting a suitable USB memory stick (USB adapter cable included), the storage capacity of the data logger can be expanded up to 64 GB. If you have purchased a networked 400 / 500 / 600 / 700 remote monitoring & control system, the measurement data can also be saved on an suitable SD card (SD card must be purchased separately).

A (remote) transmission of the sensor data recorded in real time to measurement data utilities, SNMP tools and network-management-software (Nagios, Icinga, check_MK, openITCOCKPIT, Observium, PRTG, WhatsUp Gold, Zabbix etc.) is supported by all SNMP driven Didactum monitoring and control devices. MIB files as well as plugins for Nagios and Zabbix are available free of charge.

The "Analog Power" function in the webGUI of your monitoring device is used to power the connected analog sensors on or off. For example, you can initiate a reset of the attached the smoke detectors with the "Analog Power" function. Important note of the technical editor: When deactivating the "Analog Power" function, the power supply of all analog sensors is disabled. So please handle this function carefully.

In order to measure and monitor the dew point in the server room / data center, it is required that your Didactum Monitoring System is equipped with a temperature plus a humidity sensor. Otherwise, this web-based remote monitoring device can not calculate and monitor the dew point. Simply attach the precise Humidity sensor to the monitoring device. The digital temperature and humidity sensor can also be connected to the latest monitoring units of the 100 to 700 series.

The analogue sensors can only be connected to the analogue sensor connections of your networked remote monitoring device. A direct mounting of an analog sensor on the CAN bus port is not supported. If all analogue sensor ports are occupied, you will need to obtain a CAN sensor extension box. Here you get 8 additional ports for analog sensors.

Every web-enabled remote security monitoring unit offers a so-called disconnect alarm function. If the sensor cable is cut or the intelligent sensor is destroyed by sabotage, you and your colleagues will receive a immediate alert in the form of SNMP traps, e-mail or SMS alerts (via GSM or LTE modem or Web-to-SMS server). Setting up this “sensor lost” feature is very simple: In the multilingual web front-end of the main sensor unit, go to the "Logic Schemes" menu and create a new notification or alarm rule. Here you select the corresponding sensor and define in the next selection field the status "not connected". Then simply select the desired alert function.

The basic model of Didactum monitoring system provides 8 ports for analog sensors.

By mounting the Didactum expansion modules further analogue sensors can be connected.

Stand 01/2014, a single Didactum monitoring system 500 to monitor up to 96 different analog sensors.

In order to automatically calculate and display the dew point with Didactum`s IP-capable network thermometer, you also need the humidity sensor. If the temp sensor and the relative humidity sensor are connected to your networked remote measuring and monitoring unit, just click on the web interface under "System Tree" on the "+" icon, where you will find the element "Dew point". Here you can set individual thresholds and limits. Then you only have to set up the notifications and alerts in case of an critical dew point in your (IT) infrastructure such as eMail, SMS (via 3rd party gateway) and / or SNMP traps to monitoring software.

Please remove the water detection cable from corresponding sensor and look what will happen. If you get an alarm from Didactum`s networked monitoring device, then please send the sensor to your retailer for inspection. If you get no alert, the water detection cable has been in contact with water or moisture. Then you have to clean and dry it.

Other reason can be that the environmental factor humidity (RH) is very high and vapor / moisture in on the water leakage cable. In this case you need to install a second water leakage cable in parallel , one cable connect to one contact, second to the other contact of the corresponding sensors.

The networked smoke detector can be controlled with a suitable Areosol Smoke Detector Tester. Please use no burning paper or a cigarette, since the optical detection unit can be affected by smoke.

Our programmers have deliberately integrated this feature integrated into all Didactum network enabled remote monitoring devices. In case of cable break, manipulation or tampering, disconnected sensors must be displayed and reported. After testing, the removed sensors can be deleted in webGUI. Just initiate a reboot of your Didactum remote monitoring device.

To do this, just go to the "System Menu" to the point "Reboot the system“. Please empty the cache of your Web browser.

The connected sensors should no longer be present in the webGUI after reboot. Alternatively, you can reset the alarm system Didactum also to factory default settings. Here, in "System Menu“ the entry  „Reset settings to default values“ is provided.

Currently about 15 Didactum smoke sensors can be connected in series. Here, only 1 single analog sensor port on your IP-based Didactum monitoring system is occupied.

Note that the total length of the RJ12 patch cable must not exceed 150 meters. You only get a smoke alarm for the linked smoke detectors.

The table below gives you information in terms of detection range of the smoke sensor:
 

 
Ceiling height
 
 
detection range of single smoke  sensor in square meters
 
 
Recommended distance between  each smoke sensor
 
 
Distance of smoke  sensorto the wall
 
 
 up to 3,5m
 
 
 up to 85
 
 
 9m
 
 
 4,5m
 
 
 from 3,5 to 6,0m
 
 
 up to 70
 
 
 8,5m
 
 
 4m
 
 
 from 6,0 to 10,0m
 
 
 up to 65
 
 
 8m
 
 
 4m
 
 
 from 10,0 to 12,0m
 
 
 up to 55
 
 
 7,5m
 
 
 3,5m