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General| Brand | LUDLUM |
|---|---|
| Model | 12-4 |
| Category | Measuring Instruments |
| Language | English |
Instructions for safely unpacking and verifying instrument components.
Guide for correctly installing the required "D" cell batteries.
Steps for properly connecting the neutron detector to the instrument.
Procedure to check the status of the instrument's batteries.
Steps for performing a functional test of the instrument's operation.
Recommended checks before using the instrument between calibrations.
Six-position switch for OFF, BAT, and range multipliers.
Control to adjust input sensitivity from 1 to 100 mV.
Control to vary high voltage from 200 to 2500 V.
Selects fast (4s) or slow (22s) meter response time.
Displays detector high voltage on the meter when pressed.
Specifies operating temperature, humidity, and altitude limits.
Explains caution and warning symbols found on the instrument.
Guidelines for safely cleaning and performing basic maintenance.
Detailed steps for instrument and electronic calibration, including setup.
Guidance on routine maintenance, recalibration intervals, and battery care.
Specific solutions for common problems with detector electronics.
Details the functions of the main circuit board components and their interactions.
Describes the functionality of the high voltage power supply board.
Lists capacitors, transistors, ICs, diodes, switches, and trimmers for the main board.
Lists various resistor values and specifications for the instrument.
Lists connector part numbers and types used in the instrument.
Lists components specific to the HV power supply board.
References wiring diagrams and lists the neutron detector assembly.
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