Self Recording Current Meter
Model 105
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The Models 105 & 106 of Valeport measure Speed and Direction as standard, with optional Temperature and Pressure parameters. The only difference between the two units is the size of the impeller - the larger impeller on the Model 106 gives a lower stall speed and better accuracy for current speed data, but all other specifications are the same. All measured parameters are logged within the unit, and are available for real time display on PC (using Valeport's DataLog software) over cable lengths up to 50m, or on the Model |
8008 Control Display Unit over longer cable lengths. 12 bit processing gives excellent data resolution and accuracy.
The sampling mode, rate and averaging period are set up using either the customer's PC or the Model 8008 Control Display Unit, and the set up is retained until overwritten. Calibration for all sensors is held within the instrument and data is provided in engineering units. Power may be taken from an internal battery, from a surface battery, or from the Model 8008 CDU if connected. The unit has a 512 Kbyte memory, which is capable of storing over 65,000 full paramter records. |
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Main Body All external metal parts are manufactured from titanium, providing excellent corrosion protection and long product life. All other external parts are manufactured from hard wearing polymers.
Data Acquisition The current meter works on a basic 1 second cycle, during which the impeller counts are taken and a single compass heading reading is made. From this, East and North velocity vectors are calculated, which are then summed over the averaging period. The additional paramters of temperature and pressure (if fitted) are sampled once every sample period, and averaged over the averaging period.
Setting Up Unit can be set up either by using the Model 8008 Control Display Unit, or by PC using Valeport's DataLog software. User controls sampling rate and averaging period, and, if using a PC, site information data.
Data Recovery Direct to PC via communications port. Maximum RS232 data rate of 19200 baud.
User Software DataLog Windows based PC software for data display, instrument set up, data extraction and tabular and graphical data plots.
Memory 512 KByte Solid State Memory. Each paramter record uses 2 bytes. As an example, this gives a duration of over 1 week with full parameter sampling every 10 seconds, or 220 days with samplying every 5 minutes.
Communications Self Recording Data Extraction: RS232 to PC over cable lengths up to 50m.
Digital Current Loop to Model 8008 CDU, or to PC over longer cable lengths (requires additional adaptor).
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