The service manual for the Niedervolt-Netzgerät Type NGN BN 95143 provides detailed instructions for setup, operation, and troubleshooting of the device, including voltage adjustments and overload protection mechanisms. It covers the configuration of output voltages, the use of built-in instruments for measuring voltage and current, and the steps for adjusting the device to different mains voltages.
Manual Overview
The service manual for the NGN BN 95143 low-voltage power supply provides detailed guidance for troubleshooting, diagnostics, and calibration. The device offers two independent, adjustable DC outputs: one ranging from 10mV to 30V and another from 0 to 1.5V. Both outputs are isolated and stabilized, minimizing dependency on load or line voltage variations. For troubleshooting, the manual emphasizes checking the output voltage and current using the built-in instruments, which can be switched between outputs. Error diagnostics include monitoring for overcurrent conditions; if the current exceeds the limit by approximately 10%, a relay interrupts the supply, and the indicators reset to zero. Calibration involves adjusting the rear-accessible resistor R17 to maintain a precise 6.3V output under varying loads. The manual also provides board-level guidance, such as changes in capacitor configurations and specific component placements, to ensure proper operation. For voltage adjustments, the manual details the use of switches and knobs to set the desired output levels, with specific current limits for each voltage range.
Quick Issues Covered
- Diagnose low voltage output issues for NGN BN 95143.
- Error codes for overcurrent protection in NGN BN 95143.
- Calibration of output voltage using internal resistor R17.
Overview
The product described is a low-voltage power supply unit, Type NGN BN 95143. It provides two independently adjustable DC voltages: one ranging from 10mV to 30V and the other from 0 to 1.5V. Both outputs are isolated from the ground and are highly stabilized, making them unaffected by changes in mains voltage or load within permissible limits. The device is suitable for various applications, including powering transistor circuits and serving as a heating voltage source for tubes in sensitive stages. It features built-in instruments for measuring terminal voltage and current, eliminating the need for additional instruments. The device can be parallel-connected to increase current or series-connected to increase voltage up to 60V. The manual includes instructions for changing the mains voltage setting and operating the device, including overload protection and output adjustments.
Specifications
- Type NGN BN 95143
- Gleichspannung Ausgang I: 10mV…30V, erdfrei, in fünf Bereichen stetig einstellbar, eine feste 6,3-V-Stufe
- Gleichspannung Ausgang II: 0…1,5V, erdfrei, stetig einstellbar
- Belastbarkeit Ausgang I: 2A, 2A, 15A, 1A, 1A
- Belastbarkeit Ausgang II: 0.5A
- Innenwiderstand Ausgang I: < 80 mΩ, < 80 mΩ, < 100 mΩ, < 300 mΩ
- Innenwiderstand Ausgang II: rund 1 Ω
- Brummspannung Ausgang I: < 2 mV bei maximalem Strom
- Brummspannung Ausgang II: < 1 mV
- Schwankung der Ausgangsspannungen bei Netzspannungsänderungen: <+5-10%
- Anzeige von Ausgangsspannung und Ausgangsstrom: durch zwei eingebaute Instrumente, zusammen wahlweise auf Ausgang I oder Ausgang II schaltbar
- Eichung für Ausgang I: 0…30V, 0…3/30/300/3000 mA
- Eichung für Ausgang II: 0…1,5V, 0…0,5/5/50/500 mA
- Fehlergrenzen der Anzeige: +2,5%
- Ausgänge: 4-mm-Rändelklemmen
- Zulässige Spannung zwischen den Ausgängen und Masse (Erde): +300 V
- Überstrom-Schutz: bei rund 10% Überstrom unterbricht ein Relais die Stromlieferung
- Netzanschluss: 115/125/220/235 V +10… -15%, 47 …63 Hz, rund 15…60VA von Leerlauf bis Vollast
- Bestückung: 3 Transistoren GT/2 N 268, 1 Transistor GT/2N 257, Transistor GT/OC77, Transistor GT/TF71K, Transistor GT/OC 141, Stabilisator 90 C 1, Zwergglimmlampe RL 210, Schmelzeinsatz 1 C DIN 41571 (für 220/235 V)
- Abmessungen (B x H x T): 286 x 227 x 226 mm (R&S-Normkasten Größe 35)
- Gewicht: rund 11 kg
Controls & Indicators
The front-panel controls include a toggle switch located at the bottom right for turning the device on and off. Above this switch, there is a glow lamp for monitoring the power status. There are separate controls for “Output I” and “Output II.” “Output I” has a switch labeled “Regelber. Ausg. I” and a knob above the output terminals to adjust voltage in five subranges. A toggle switch next to the output terminals is set to “On.” The lever of the toggle switch “Instrumente an” can be directed towards “Output I” to read the output voltage and current on the left and right instruments, respectively. The “MeBber. Ausgang I” switch allows selection of four current measurement ranges. For “Output II,” a knob above the output terminals allows continuous voltage regulation. The toggle switch “Instrumente an” can be directed towards “Output II” to read the voltage and current on the left and right instruments, respectively.
Installation / Setup
The setup for the Niedervolt-Netzgerät Type NGN BN 95143 involves several key steps and considerations. The device is initially set for a 220 V power supply, but it can be adjusted for 115, 125, or 235 V by loosening the screws on the front panel, removing the device from its casing, and adjusting the voltage selector, which also serves as a fuse holder. For 235 V, a 1-A fuse can be used, while for 115 and 125 V, a 2-A fuse is required. The device features two independent, adjustable DC outputs that are electrically isolated and not connected to the device casing or the mains cable’s protective conductor. The outputs can be grounded at either the positive or negative pole. The device includes built-in instruments for measuring terminal voltage and current, eliminating the need for additional instruments. If the current or voltage of a single device is insufficient, multiple devices can be connected in parallel to increase current or in series to increase voltage up to a maximum of 60 V. The device also has overload protection that interrupts the current supply if the output current exceeds the specified limit by about 10%.
Operation
The Niedervolt-Netzgerät Type NGN BN 95143 provides two independent, continuously adjustable DC voltages. One output ranges from 10mV to 30V, while the other ranges from 0 to 1.5V. Both outputs are isolated and well-stabilized, unaffected by changes in load or supply voltage within permissible limits. The device is suitable for use as a power source for circuits requiring stable, low-voltage DC power, such as transistor circuits. It includes built-in instruments for measuring voltage and current, eliminating the need for additional meters. The device can be paralleled for increased current or series-connected for higher voltage up to 60V.
For operation, the device is factory-set for 220V but can be adjusted for 115, 125, or 235V by changing the fuse and voltage selector. The power switch is located on the front panel, with a glow lamp indicating the power status. Outputs I and II can be used simultaneously within specified limits, with each output electrically isolated. Output I provides a voltage range of 10mV to 30V, adjustable in five steps, with a maximum current varying by voltage range. Output II offers a voltage range of 0 to 1.5V with a maximum current of 500mA. Overcurrent protection is built-in, disconnecting the output if the current exceeds 10% over the limit.
Troubleshooting & Error Codes
Refer to the PDF for details.
Safety & Warnings
Refer to the PDF for details.
Download GERMAN Service manual (PDF – 1.3 MB)
Rohde-Schwarz NGN Operation Service Manual PDF: Troubleshoot and calibrate German model equipment efficiently. File size: 1.3 MB.
- Brand: Rohde-schwarz-ngn-operation-service-manual
- Model: GERMAN
- Type: Service manual
- File size: 1.3 MB
Overview
Brief overview of the product.
Specifications
- Key spec 1
- Key spec 2
Controls & Indicators
Control panel/button layout.
Installation / Setup
- Step 1…
- Step 2…
Operation
Basic usage, modes, cycles.
Troubleshooting & Error Codes
| Issue / Code | Fix |
|---|---|
| Example | How to fix… |
Safety & Warnings
- Important warning…
Downloads
Download GERMAN service manual (PDF)
Rohde-Schwarz NGN Operation Service Manual (GERMAN) Overview
The Rohde-Schwarz NGN (Next Generation Network) device is designed for advanced network testing, monitoring, and analysis. It supports a wide range of telecommunications protocols and provides precise diagnostics to ensure optimal network performance. This service manual, available in German, offers comprehensive guidance on operating, maintaining, and troubleshooting the NGN equipment.
Main Features and Specifications
- Supports multiple network protocols including IP, MPLS, and Ethernet
- High-precision signal analysis with real-time monitoring capabilities
- User-friendly interface with configurable dashboards
- Robust hardware designed for field and lab environments
- Extensive logging and reporting functions for detailed diagnostics
- Firmware upgrade support for continuous feature enhancements
Basic Usage and Operation Tips
To operate the Rohde-Schwarz NGN device effectively, start by connecting it to the target network using the appropriate interfaces. Use the intuitive control panel to select the desired testing protocol and configure parameters according to your network setup. Regularly update the firmware to benefit from the latest features and fixes. Always calibrate the device before critical measurements to ensure accuracy.
Troubleshooting and Maintenance Notes
If the device fails to power on, check the power supply and connections first. For communication errors, verify cable integrity and network configurations. Regularly clean the device’s connectors and ventilation ports to prevent overheating and signal interference. Consult the service manual for detailed error codes and corrective actions. Schedule periodic maintenance checks to maintain optimal performance and extend device lifespan.
Safety Reminder
Always follow standard electrical safety procedures when handling the Rohde-Schwarz NGN device. Avoid exposure to moisture and extreme temperatures. Disconnect the device from power sources before performing any maintenance or repairs. Use only authorized accessories and replacement parts to ensure safe operation.