SVNE-2 Mendeleevets - Electronic operating time counter
Application area
The counter is used for recordkeeping of operating time of cathodic protection stations. It can be built in the new equipment and used at repair for replacement of failed electromechanical and other counters of operating time.
Advantages
- the accounting of operating time on two channels: voltage and output current cathodic protection station;
- possibility to connect external operating time counter on current;
- сохранение в энергонезависимой памяти значения счета, событий включения и выключения;
- saving of counting values, facts of switching on and off in the permanent (nonvolatile) memory;
- protection against overvoltage and impulse noise;
- galvanic isolation of measuring circuit;
- powered by USB in order to take readings with the power off
Technical details
The operating time counter SVNE-2 is made in plastic case designed for mounting on DIN lath 35 mm wide in accordance with GOST of R IEC 60715 or on the mounting board.
On the front panel of the counter there are:
– display;
– control buttons K1 and K2;
– USB connector for PC.
At the top and at the bottom there are terminals for connecting power supply and shunt.
The basis of the counter is the quartz resonator of the stabilized electric fluctuations. The signal from the resonator arrives on the microcontroller which carries out the accounting of time and information output on the LED display in the form of decimal number with one category after a comma. Operation hours are stored in the built-ferroelectric RAM.
Pic 1 - Typical connection scheme of SVNE-2
Technical data
| Parameter name | Value |
|---|---|
| Allowed counting time error, %, no more than | 0,2 |
| Range of time tracking, hours | 0 ÷ 99 999,9 |
| Step, hour | 0,1 |
| Setpoints of a threshold for current counting, mV | 0,1; 0,2; 0,3; 0,4; 0,5; 0,6; 0,7* |
| Current consumption from battery, mcA, no more than | 4,5 |
| The breakdown voltage of insulation of galvanic isolation of the measuring circuit, V, not less than | 1000 |
| Running time | No limits |
| Protection degree provided with the cover | IP34 |
| Running temperature, °С | from -40 to +40 |
| Relative humidity at a temperature + 25 °С, %, no more than | 95 |
| Average service lifetime, years, not less than | 10 |
| Dimensions (LxWxH), mm, no more than | 160x100x50 |
| Weight, g, no more than | 400 |
| *For shunt 75 mV/150 A – 200 mA; 400 mA; 600 mA; 800 mA; 1000 mA; 1200 mA; 1400 mA | |
Delivery set
| Name of items for delivery set | Quantity |
|---|---|
| Electronic operating time counter SVNE-2 | 1 |
| Battery CR2032 | 1 |
| USB cable (A) | According to the order |
| Operation manual | 1 |
| Packaging | 1 |
Conventions
| SVNE-2 | TU 4282-037-24707490-2014, OKPD2 26.52.13.110 | |||