Programmable current calibrator P321

Also, this device can be called: P-321, P 321.

P321 programmable current calibrator is a precision calibrated source currents and voltages with manual and program control and is designed for use in automated calibration settings, as well as a separate device for verification of analog and digital DC appliances.

Specifications P321:

Range issued calibrated currents for CT - 10^-9 A to 10 A (finite values - 10 mcA, 100 mcA, 1 mA, 10 mA, 100 mA, 1 A, 10 A).

Range issued calibrated voltage mode KH - from 10^-5 to 10 V (finite values - 1 V, 10 V).

Calibrated values ​​of currents and voltages are fixed on the light board.

Calibrated current setting increment:

- on bands with finite values ​​of 10 mcA, 100 mcA and 1 mA - 1 nA;

- on bands with finite values ​​of 10 mA, 100 mA - 10 nA; 100 nA;

- on bands with finite values ​​of 1 A, 10 A - 1 mcA, 10 mcA.

Readability setting calibrated voltage - 10 mV.

Calibrators P321 can be manually controlled switches on the front panel, or commands from an external connector UP.

Control software provides:

- startup and shutdown commands calibrator "Start" and "Reset", respectively;

- installation of the final value of the calibrated range and level of current and voltage.

Output accuracy calibrated voltages and currents, as well as the maximum permissible error of the relative values of the calibrated voltages and currents after zeroing and calibration are given in the table below:

where γ_1, γ₂ - dimensionless quantities are numerically equal accuracy class of a normal element and measures the electrical resistance, used for calibration.

Limit of acceptable error calibrator P321 for 3 months of work specified in the table below:

Setup time calibrator P321 - no more than 1 hour.

Continuous operation of the calibrator, excluding setup time in the working conditions of use - at least 8 hours a break to re-enable calibrators - not less than 1 hour.

Instability calibrated current (voltage) due to internal fluctuation noise level calibrator, and the rms value of the variable component at the output of the calibrator in the frequency up to 1 MHz is listed in the table below:

Limit of acceptable calibrator additional error caused by changes in ambient temperature from the temperature at which the calibration is performed, to any temperature within the operating temperature for every 10° C:

- on all bands than 1 A and 10 A - the limit of acceptable basic error;

- on bands 1 A, 10 A - double the limit of acceptable basic error.

Calibrator provides P321 load voltage mode CT and load current mode on CN ranges:

- with a final value of 10 mcA, 100 mcA, 1 mA, 10 mA, 100 mA - not more than 30 V;

- a final value 1 A - no more than 10 V;

- with a final value of 10 A - not more than 2 V;

- with a final 1, 10 - not more than 1 A.

Limit of acceptable calibrator additional error caused by the change in voltage at the load of 10% to the permissible values ​​in CT mode equal to the limit of acceptable basic error.

Limits of additional error calibrator values ​​due to changes in load current 10% to a valid value in the mode of the CN, equal to the limit of acceptable basic error.

Margin adjustment trimming elements needed for calibration, with the release of the calibrator - not less than 20% of the control range.

Time to establish a calibrated current - no more than 5 seconds.

Electrical resistance between the terminal «╧» calibrator and housing - no more than 0,5 Ohms.

Insulation between the body and the network can withstand for 1 min test voltage AC 50 Hz with the current value of 1.5 kV.

The insulation resistance between the case and the P321 scheme isolated areas specified in the table below:

Level control of the output current (voltage) is carried out in BCD 8-4-2-1.

Teams are made with a signal of logical "1" with respect to clamp «╧».

Logical signal "1" corresponds to the voltage level of 2.4 V to 5.25 V.

Signal logic "0" corresponds to the voltage level of 0.4 V to 0.5 V.

Disable the output of the calibrator P321 command "Reset" signal is accompanied by the presence of a logical "1" on track "P" connector UP.

Connector pins UP:

- run command - A;

- reset command - P;

- set the end value 10 mcA - C;

- set the end value 100 mcA - T;

- set the end value 1 mA - Y;

- Set the end value 10 mA - X;

- set the end value 100 mA - C;

- set the end value 1 A - 12;

- set the end value 10 A - 13;

- set the end value 1 V - F;

- set the end value 10 V - 17;

- set the output current (voltage) 8·10^-1 - B;

- set the output current (voltage) 4·10^-1 - V;

- set the output current (voltage) 2·10^-1 - G;

- set the output current (voltage) 1·10^-1 - D;

- set the output current (voltage) 8·10^-2 - E;

- set the output current (voltage) 4·10^-2 - Zh;

- set the output current (voltage) 2·10^-2 - Z;

- set the output current (voltage) 1·10^-2 - I;

- set the output current (voltage) 8·10^-3 - K;

- set the output current (voltage) 4·10^-3 - L;

- set the output current (voltage) 2·10^-3 - M;

- set the output current (voltage) 1·10^-3 - N;

- set the output current (voltage) 8·10^{-4 -} 5;

- set the output current (voltage) 4·10^{-4 -} 6;

- set the output current (voltage) 2·10^{-4  -} 7;

- set the output current (voltage) 1·10^{-4  -} 8;

- set the output current (voltage) 8·10^-5 - 9;

- set the output current (voltage) 4·10^-5 - 10;

- set the output current (voltage) 2·10^-5 - 11;

- set the output current (voltage) 1·10^-5 - 15;

- set the output current (voltage) 8·10^-6 - 16;

- set the output current (voltage) 4·10^-6 - 18;

- set the output current (voltage) 2·10^-6 - 19;

- set the output current (voltage) 1·10^-6 - 21.

Power consumption - not more 350 V·A.

Dimensions calibrator P321:

- control unit - 488×250×535 mm;

- power supply - 488×170×535 mm.

Weight P321:

- control unit - no more than 25 kg;

- power supply - no more than 20 kg.

Operating conditions P321:

Ambient temperature - +10° C to +35° C.

Relative humidity at +25° C - 80%.

Calibrator programmable P320 withstands temperatures from -50° C to +60° C.

Calibrator relative humidity 95% at +40° C.

Capacity of the power calibrators:

- frequency - 50±1 Hz, 60 Hz±1,2;

- voltage - 220±22 V.