Encardio-rite model EDI-51V is a micro-processor based standardised read-out unit which can be used with any Encardio-rite vibrating wire sensor.

Important features: Robust, waterproof, easy to operate and low cost. Can display the measured parameter directly in proper engineering units Storage facility for calibration coefficients of up to 250 transducers. Data storage for either around 3200 readings from any one vibrating wire sensor or about 6 sets of readings from all the 250 sensors. A battery backed real time clock is provided for time and date stamping of each measurement stored. RS-232C serial output to connect a serial printer or IBM compatible PC. The read-out unit provides non-linearity correction using polynomial constants. Powered with internal 6 V rechargeable SMF battery. It can display the measured frequency in terms of time period, frequency, frequency squared or the value of the measured parameter directly in proper engineering units. Standard engineering units which can be displayed are ue (micro-strain), ksc (kg/cm2), kg, t, mm, m, C and deg. For sensors provided with a YSI 4405 or Dale 1C3001-B3 or Alpha 13A3001-B3 3 kW thermistor, the temperature can be displayed directly in deg C.

Model EDI-51V read-out unit has an internal non-volatile RAM of 2 k byte capacity with daa storage capacity of around 3200 readings. The stored readings can either be uploaded to a host computer using the serial interface or can be printed out on any text printer equipped with a RS-232C serial communications interface. The set-up information (calibration coefficients) for all the channels can also be printed out for verification. The magnetic wire in the vibrating wire sensor is excited through a sensor coil by a swept square wave frequency pulse, 5 V (typical) peak to peak provided by the model EDI-51V digital indicator. The read-out has provision for non-linearity correction of the physical parameter being measured by a vibrating wire sensor. If error due to repeatability and hysteresis of any non-linear transducer is less than the desired accuracy, then by using polynomial correction, the digital indicator can give a better accuracy than is possible by linear approximation. The gage reading is displayed on a LCD dot matrix alphanumeric display, 16 characters x 1 line. The display is used to show the measured value and also for communication with the operator during data entry. A potentiometer is provided for contrast enhancement. A 16 key weather sealed membrane keypad is provided for data entry, set-up, storage, recall and other functions. An internal 6 V rechargeable sealed maintenance free battery is used to provide power to the indicator. A fully charged new battery provides nearly 60 hours of operation on a single charge. A red lamp marked 'Low Batt' provided near the display lights up to indicate that the remaining battery power is less than 15 % of its rated capacity. A separate battery charger is provided with the EDI-51V indicator to charge the internal battery. The read-out unit is housed in a splash proof plastic moulded enclosure with weather proof connectors for making connections to the transducer and the battery charger. Download datasheet in pdf format, for detail specifications.