Process signal verification simulator

Products overview:
ZW - YF - 3 seriesProcess simulation signal calibration instrumentHave professional strong resistance measurement and the function, of output.Thermal resistance checking instrument can test and calibration temperature transmitter, temperature display instrument and data acquisition system, can also measure the temperature and thermal resistance circuit directly.
Second, the working principle:
ZW - YF - 3 seriesProcess simulation signal calibration instrumentPrinciple is when the voltage being measured by precise resistance and relays, programmable voltage divider circuit composed of transformation into A suitable small voltage signal amplitude, after the buffer amplifier, sent to the high precision A/D device, and with the appropriate sampling rate, the instantaneous value is converted into digital signal flow.
Measured electricity flows through the built-in high precision electronic compensation type transformer, namely direct access type measuring, or electronic compensating clip-on transformer (clamp table measurement), will be measured current transform into A suitable small current amplitude, sampling by precise resistance into A voltage signal to the high precision A/D device, with the appropriate sampling rate will be instantaneous value is converted into digital signal flow.The digital signal of the measured voltage and current in transmission by FPGA logic circuit for photoelectric coupler, realized the circuit under test and test system of electrical isolation.Ensures the test safety and stability of the test data.
Applicable occasions:

ZW - YF - 3 seriesProcess simulation signal calibration instrumentPowerful and easy to use site calibrator, measurement, DC current and DC voltage, output 0 to 5 v DC, 0 to 20 ma DC, and can measure 0 to 10 v DC, 0 to 20 ma DC.
Four, the main features:
1, wide application scope of the operation is simple, easily;
2, the function is all ready, measurement, dc current and dc voltage, 0 ~ 5 VDC, 0 ~ 20 madc, measurement of 0 ~ 10 VDC 0 ~ 20 madc;
3, 24 VDC constant voltage source, can be directly set-up two wire transducer;
4, 20% manual step point ability, can quickly detect linear;
5, optional fast, slow slope step function, providing continuous smooth output to test loop and slide valve.
Five, the technical parameters:
Simulation: 1, the current 0 ~ 20 madc current measurements: plus or minus 20 ma;
2, the output voltage 24 v loop, load 30 ma.
3, accuracy, temperature drift: plus or minus 0.005% / ℃, using temperature range of 0 ~ 50 ℃, humidity range < 90% RH, storage temperature range - 10 ~ 80 ℃;
4, power supply: removable high-performance nimh battery pack, charge > 8 hours continuous working time, external 1 only 12 vdc1a output switching power supply;
5, appearance size: 235 * 96 * 55 (mm);
6, weight: 500 g.
Six, conditions of use:
1, power supply: 6 v nimh (li-ion) battery, charging, 220 vac, 5 hz;
2, temperature: 0 ~ 50 ℃ (beyond the temperature range, there is a decrease in the accuracy may be);
3, humidity: 0 ~ 85% RH;
4, environment: no corrosive gas.
Seven, the basic functional requirements:
1, go out requirements should be as small as possible volume, light weight as possible;
2, no job site work station, make verification work in most cases is placed in the ground use;
3, on-site data measurement requirements to be able to store data in a reliable way, and can be easily exchanged;
4, if there is a need to measure the error of electric energy, requires verification must first is a standard watt-hour meter, and should be a convenient site operation, high precision, multi-function watt-hour meter, intelligent;
5, sometimes field wiring inspection is required, which requires the verification needs to vector analysis, can display the vector diagram and the wiring diagram, don't identify lines, so the tester is a combination of standard watt-hour meter and vector analysis software.
Eight, measuring accuracy:

Nine, selection table:

Note:
1, power supply: this machine is equipped with a removable 6 v1300mah high-energy nimh battery pack 1 fast, large capacity can meet the field work long hours.External charging power supply for the DC12V1A import switching power supply;
2, working environment: < 0 ~ 50 ℃ temperature humidity 90% 3. Size: 223 * 96 * 55 mm4;
3, weight: 500 g;
4, the statement: the actual product appearance may, sometimes involves the change of technical standards, product development and shape change, without prior notice.

Quality assurance and after-sales service:
ZW - YF - 3 series process simulation signal calibration instrument product quality assurance period for 12 months, life-long maintenance.Warranty period for the damage, free maintenance, more than warranty, maintenance fee and shipping fee only.To new users first use, generally by the menu function prompts the operation, there are technical difficulties, please call the company technical department to give answers. Company can send engineers to the scene to guide if necessary.