522 Krohn Hite Multifunction Calibrator

Features:

• Accuracies based on one full year calibration cycle and conservatively specified by using the "Limit of Error" (or Worst Case) methods.
• E Mode: ±(0.002% of setting + 0.0005% of range + 2 µV)
• I Mode: ±(0.005% of setting + 200 nA)
• Programming: IEEE-488 (GP-IB) and local/manual control. (Note):Operator has control of local/remote mode i.e., shutdown not required to re-establish "local" control.)
• 3 Voltage ranges (1 ppm resolution or 6 decades)
• ± 100 Vdc resolved to 100 µV
• ± 10 Vdc resolved to 10 µV
• ± 100 mVdc resolved to 0.1 µV
• 2 Current ranges (1 ppm resolution or 6 decades)
• ± 100 mAdc resolved to 0.1 µA
• ± 10 mAdc resolved to 0.01 µA
• (Note: 100 Vdc Compliance with variable control.)
• Floating output. Optically isolated between analog output and digital input lines.
• True bipolar control with balanced zero.
• Magnitude is maintained during polarity changes, and scaled on function changes and range changes in the manual mode. i.e., this eliminates the requirement of re-entering the magnitude.
• A "crowbar", or short circuit, of the output may be selected.
• Alpha-numeric dot matrix display, for ease of reading and less digital noise on the analog output.

Applications:

• Calibration of DVMs, DMM, meters, chart recorders, A/D converters, ATE, monitors, controllers, logging systems, etc.
• Simulation of thermocouple and strain gages. (4 to 20 mA and 10 to 50 mA) and other transducers.

Specifications:

Isolation

• Power Transformer to analog output: 2.5 x 104
• M Ohms, 300 pF Control logic to analog
• output; optically isolated. 10 9 Ohms, 130 pF, 500 Vdc

Temperature Coefficient

• Ambient: ±0.0005% / º C
• Operating Limit: ± 0.001% / º C

Switching and Settling Times

• Step Changes: 5 ms
• Range Changes: 300 ms

Protection

• Voltage mode: Short-circuit and overload protection.
• Current mode: Open-circuit protection.
• Front panel enunciator and alpha-numeric display will indicate malfunction condition.
• Warm-up Time: 1 hour to rated accuracies
• 5 Win-man\522.wpd
• 1.4.1 Noise & Ripple: The following specifications are furnished in detail so the user can have complete
• confidence in the results of their tests.

The Model 522 is a microprocessor controlled DC Voltage Calibrator and is a highly versatile reference source designed to meet the needs of today's demanding requirements for accuracy and stability.  The unit's specified accuracies are traceable to the National Institute of Standards and Technologies.