JY821-H Chinese Full Function Calibration InstrumentDetailed product description：

JY821-H Chinese large screen full function calibrator uses a bright display window and a fully Chinese dual channel interface, which can simultaneously observe output and measurement data; Fully enclosed film button, completely preventing the invasion of corrosive gases, rainwater, and dust, especially suitable for harsh environments; Insert the plug into the corresponding socket position, and the screen will automatically switch to the corresponding range unit; Large capacity nickel hydrogen rechargeable batteries can be used while charging, with battery capacity display; The fast charger monitors the charging status in real-time and automatically cuts off the power to protect the battery; All signals can be stored at 10 calibration points; 8 device numbers for the tested instruments can be set, and each device number can record 15 pages, with 3 data records per page (one of which is a user-defined input value); When outputting and measuring thermocouples/thermal resistors, their temperature accuracy is superior to imported portable products of the same type; In terms of noise, temperature drift, time drift, applicable temperature range, linearization processing, stability, and typical accuracy, it has surpassed similar portable products worldwide. The output function has: safety features: automatic protection when all output ports are short circuited, and can withstand 36V DC voltage mistakenly entering; Paperless records; Step level, slope (automatic/manual); Support signal fine-tuning or continuous increase and decrease; Automatic compensation of lead resistance value; Cold end temperature compensation (automatic/manual); Follow the 90 International Temperature Scale; Temperature polarity selection; Percentage display. The measurement function has: safety features: all measurement ports can withstand a voltage of 220V AC accidentally entering; Paperless records; Collect environmental temperature (accuracy: ± 0.2 ℃); Cold end temperature compensation (automatic/manual); Follow the 90 International Temperature Scale; Ω input/output two, three, and four wire systems are available; Percentage display; There is a school zero prompt.

technical indicators
Accuracy level: 0.01 level, accuracy: ± (0.008% reading+0.002% full degree) 2-year guarantee (applicable temperature range: 0 ℃~30 ℃);
0.02 level, accuracy: ± (0.015% reading+0.002% full degree) 5-year guarantee (applicable temperature range: 0 ℃~45 ℃);
Factory accuracy: It is the internal control index of the manufacturer for the factory products in an environment of 20 ℃± 2 ℃. The large margin left is to consider the inevitable effects of temperature drift, time drift, and noise in the future, ensuring that users can ensure the accuracy of use for many years!
Factory temperature coefficient: The internal control index provided by the manufacturer for the "factory product" to ensure the accuracy of use within a wide "applicable temperature range" for users.
Note:
In the measurement, V and mV are both in automatic range.
Thermocouple types: S, R, B, K, N, E, J, T, WRe3-25, WRe5-26
Thermistor types: Pt100, Cu50, G, BA1