Rohde-schwarz-uig-operation-service-manual GERMAN – Service manual (PDF)

The Rohde & Schwarz UIG service manual provides detailed instructions for setting up, operating, and troubleshooting the DC-Mikrovoltmeter, including checking and adjusting the mechanical and electrical zero points, battery control, and connecting devices. It also covers maintenance and repair procedures such as replacing battery sets and fuses, ensuring the device's protection against overloads and its functionality as a preamplifier for various measurements.

Brand: Rohde-schwarz-uig-operation-service-manual
Model: GERMAN
Type: service manual
File size: 7.1 MB

Manual Overview

The Rohde & Schwarz UIG DC microvoltmeter is designed for precise measurement of DC voltages and currents, with additional functionality as a low-noise preamplifier. It features a measurement range from 0.2 µV to 320 V for voltage and 1 pA to 320 mA for current, adjustable via two switches. The device is protected against overloads by electronic circuits and fuses. It operates independently of the mains supply using dry batteries, making it suitable for isolated measurements. The instrument includes a differential input stage that converts DC to AC, amplifies it, and then rectifies it back to DC, with a feedback loop maintaining constant gain. Calibration involves adjusting the voltage and current zero points using front-panel screws. For troubleshooting, the manual provides a block diagram and detailed circuit descriptions to assist with diagnostics and repairs. Error codes and specific board-level guidance are not explicitly detailed in the provided sections.

Quick Issues Covered

Diagnose power-up failures with battery checks and replacements.
Calibrate electrical zero points for accurate measurements.
Adjust mechanical zero point to ensure instrument accuracy.

Overview

The DC-Mikrovoltmeter UIG, identified by number 203.5111, is a highly sensitive measuring device for direct currents and voltages. It features a preamplifier output, allowing it to function as a low-noise and low-drift preamplifier for DC recorders and digital voltmeters, as well as a measuring amplifier. The voltage measurement range spans from 0.2 µV to 320 V, extendable to 30 kV with a DC probe, while the current measurement range is from 1 pA to 320 mA. The device is equipped with two switches for setting measurement units and range limits. It includes a moving-coil instrument with a 105° mirror scale and a central zero point, eliminating the need for polarity switching. The UIG is protected against overloads by an electronic protection circuit and fuses in current ranges. It is powered by dry batteries, making it independent of the mains and suitable for measurements requiring isolated setups. The device’s low power consumption ensures battery life is limited only by storage capability. The UIG is suitable for a variety of measurements in laboratories, production, and service environments, and can measure high and low resistance values with the aid of a voltage or current source. Its high sensitivity and isolated design also make it suitable as a null indicator and tolerance gauge in bridge measurements.