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on the pressure housing. Without internal amplifier the sensors must be connected to the 
in-situ amplifier which is connected to the bulk-head connector via a cable. 
 

6.4 Sensors for the Field DataLogger Mini 

The FDL Mini can be equipped with sensors for O

2

, H

2

, H

2

S, NO, N

2

O and STOX on 

amperometric channels and electrodes for pH and redox on potentiometric channels. The 
sensors can in the standard version be deployed down to 50 m and in the deep-sea version 
down to 6000 m. Only the N

2

O sensor is not available in a deep-sea version.  

Furthermore, temperature is logged continuously with all other data from a sensor mounted 
inside the pressure housing.  
 

NOTE:

 Polarization of the sensors must be set for each channel individually from within 

SensorTrace Logger. This must be done BEFORE mounting the sensors! Wrong polarization 
may destroy the sensor! For setting polarization see 7.3.1 

Setting polarization

  

 

6.5 Charging and battery 

Battery life time is about 3 months at 25 °C  
Charging time is about 5 hours 
Battery state can be seen in the Unisense Logger software. See 7.3.4 

Checking battery level 

and storage capacity.

 

 

6.6 Computer connection  

The PC communication cable (MDL-COM001) connected to the communications bulkhead 
connector at the non-sensor end of the FDL Mini allows communication between the FDL 
Mini and a computer. Using the SensorTrace Logger software the settings of the FDL Mini 
may be changed, logged data may be downloaded, and the instrument may be used online.  
 

6.7 Logging capabilities 

The FDL Mini comes with 8 GB (micro SD) of data storage capacity. 24 hours logging of the 
signal from four sensors at 1 data point per second gives 2.3 MB corresponding to more 
than 3000 days of data storage capability with 8 GB memory. 
 
The FDL Mini can log data at five different intervals: 1 sec., 10 sec. or 60 sec. 
All channels will log at the same frequency. 
 

6.8 Connection with external units 

The FDL Mini can send data in real time to 

external units such as CTD’s or ADV’s

 using RS-

232 or RS-485 serial protocols. The serial protocol allows that the external unit can poll the 
FDL Mini for getting the last data point. Only one of these serial standards (RS-232 or RS-
485) is supported on one instrument and must be chosen at the time of ordering. Please 

Содержание Mini

Страница 1: ...Field Datalogger Mini Manual Field Datalogger Mini October 2018 docx...

Страница 2: ...l features 10 6 1 Operating principles 10 6 1 1 The Always on principle 10 6 1 2 File creation 10 6 1 3 Download of data 10 6 1 4 Data calibration 10 6 2 Support for STOX sensors 10 6 3 Sensor connect...

Страница 3: ...with built in amplifier 17 7 4 2 Channel with external in situ amplifier 17 7 5 Downloading data to PC 17 7 5 1 File size and download time 18 7 6 Calibration 18 7 6 1 Calibration of the sensors 18 7...

Страница 4: ...se or the inability to use this product 1 3 Repair or adjustment Equipment that is not covered by the warranty will if possible be repaired by Unisense A S with appropriate charges paid by the custome...

Страница 5: ...fy reverse engineer disassemble or de compile all or any part of the software or rent lease distribute or sell the software The Customer shall however be entitled to make one copy of the software for...

Страница 6: ...dditional products or if you encounter any problems and need scientific technical assistance please do not hesitate to contact our sales and support team We will respond to your inquiry within one wor...

Страница 7: ...ation of the front guard is collected together with the signal for O2 concentration The FDL Mini may be integrated with other platforms It may be powered from a CTD or ADV or other source using a 6 28...

Страница 8: ...ini external features Two channel left and four channel right FDL Mini seen from the sensor end These dataloggers are with built in amplifiers FDL Mini with Off dongle and dummy mounted at the non sen...

Страница 9: ...13 Ah 7 4 V Deployment up to 3 months 25 C Not included to be ordered separately Unisense in situ microsensors Connectors for in situ microsensors In situ amplifiers with cable one for each channel w...

Страница 10: ...data that are already stored Therefore when data is downloaded at the end of a deployment the file will contain all data from that deployment Downloading data during a deployment can be used as a sne...

Страница 11: ...e seen in the Unisense Logger software See 7 3 4 Checking battery level and storage capacity 6 6 Computer connection The PC communication cable MDL COM001 connected to the communications bulkhead conn...

Страница 12: ...for connecting the FDL Mini with external units are ordered separately 7 WORKING WITH THE FIELD DATALOGGER MINI 7 1 Connecting the Field DataLogger Mini to a PC The FDL Mini is connected to a USB por...

Страница 13: ...rization must be set correctly and individually for each channel Wrong polarization may destroy the sensor The correct polarization for each type of sensor is found in the sensor manual Open the Senso...

Страница 14: ...create a new logging file in the FDL Mini 7 3 2 Setting sampling rate Right click one of the channels and select Device settings In the window that opens you may select the datalogging frequency for t...

Страница 15: ...he Set button to set the instrument time to the date and time displayed in the New time box Click the Synchronize button to set the instrument time to the current date and time of the connected PC NOT...

Страница 16: ...ltage range for the amplifier Select the smallest range possible to get the most out of the resolution of the amplifier matching the expected signal range of the sensors It is recommended not to selec...

Страница 17: ...housing The sensor needs to be mounted on an In Situ Connector which is then connected to the In Situ Amplifier See separate manuals for this http www unisense com manuals Note Most microsensors requi...

Страница 18: ...stored in the Logger file on the PC and not on the FDL Mini which will only store raw data After downloading a file from the FDL Mini data must be calibrated in Logger using an already stored calibra...

Страница 19: ...and are applied to the FDL Mini datafile after logging is completed Open the data file in Logger using File Open dialog Make the dataset active by double clicking the appropriate experiment name in th...

Страница 20: ...ata file into Logger Double click the relevant experiment in the Experiment overview window to the left Select the data tab name identical to the Experiment name Click the Export button Choose the fil...

Страница 21: ...sor is sensitive to temperature and calibration should be done at the same temperature as the measurements If temperature varies during the deployment the calibration should be done at both the highes...

Страница 22: ...y o See 7 3 4 Checking battery level and storage capacity For each channel set the correct polarization voltage for the sensor to be connected o See 7 3 1 Setting polarization Set the Sampling rate o...

Страница 23: ...ftware Consult the Logger part of the SensorTrace Suite manual http www unisense com manuals for details on how to log data directly on a PC Note that the delivery of data from the FDL Mini to the PC...

Страница 24: ...www unisense com info unisense com...

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