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General| Brand | BRUEL & KJAER |
|---|---|
| Model | 2307 |
| Category | Measuring Instruments |
| Language | English |
Details modifications to the instrument for improved performance and notes on local representative service.
Instructions on how to order spare parts, emphasizing the need for instrument type and serial number.
Guidance on diagnosing and correcting faults, including rechecking voltages and basic functions after repairs.
Explains signal processing through potentiometers, attenuators, and the chopper stage for the input signal.
Details the rectifier circuit, its response types (RMS, average, peak), and the lower limiting frequency.
Describes the output amplifier, feedback, and the role of the range potentiometer in resolving power.
Instructions for removing the Range Potentiometer safely, including precautions for the writing system.
Details the remote control circuitry, including start/stop, motor drive, and paper drive functions.
Explains the start/stop circuit and motor drive section, including associated components and logic.
Describes various paper drive functions like Stop, Continuous, Automatic Stop, Polar, and X-Recording.
Details polar recording and X-recording modes, their operation, and external control.
Lists test points and expected DC and AC voltage values for calibration and verification.
Procedure to verify and adjust the writing speed, checking paper length against sapphire movement.
Method to test the instrument's resolving power by adjusting attenuator steps and checking deflection.
Procedure to check and adjust the writing system's overshoot, ensuring it does not exceed 1 mm.
Method to measure and adjust the DC voltage across the driving coil for proper output amplifier balance.
Procedure to balance the input amplifier, checking DC voltages and overload response.
Checking input potentiometer range and adjusting sensitivity, including 100 mV reference calibration.
Procedure to verify maximum driving power by measuring voltage across the driving coil.
Checking rectifier response modes (Average, Peak, DC) by observing sapphire deflection.
Procedure to check frequency response and cut-off across various settings and frequencies.
Procedure to detect hum by monitoring sapphire movement when changing frequency towards mains frequency.
Instructions for cleaning and checking the Range Potentiometer, including lamellae and slider.
Testing stop, continuous, automatic stop, polar recording, and X-recording paper drive functions.
Instructions for cleaning the writing system and adjusting the dB scale.
Detailed steps for removing the magnet system and measuring coil resistance.
Instructions for removing gear wheels from the gear box, including chain wheels and nylon gears.
Steps to remove the motor, including desoldering wires, removing circuit boards, and circlips.
Procedure to test and adjust the friction clutch by ensuring it slips at 200g pressure.
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