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| | | photomultiplier voltage divider C637 series | | |
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| | | 1 description Voltage dividers provide the set of voltages required to operate a photomultiplier. The C637 series of voltage dividers is designed for 30 mm diameter, 11 stage photomuiltiplier tubes. Built onto an epoxy glass circuit board using a combination of surface mount and leaded components, the C637 series covers a range of applications with the following variants: • C637A uniform voltage divider for general purpose applications ^ C637B divider specifically for box and grid photomultipliers • C637C tapered distribution forpulsed lightapplications Terminal posts T1 to T4 are provided for solder connection to high voltage power supply and signal leads. Leads to customer specification, with or without connectors, are available at an extra cost. It is recommended that any electromagnetic screening around the photomultiplier tube is connected to photocathode potential via terminal post T5. | | |
| | | Examples of the Electron Tubes range of Voltage Dividers | | |
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| | | C637 voltage dividers are available as a board only, or mounted 5 outline drawing (mm) on a B14B socket, either unflanged or flanged. mounting option O (ie. C637AO) 2 applications The C637 series is suitable for the following applications using 30 mm diameter, 11 stage photomultiplier tubes: • analogue • pulsed light • photon counting | | |
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| | | mounting option S (ie. C637AS) | | |
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| | | • compact • lowcost • high reliability • positive or negative high voltage • ac/dc coupled versions ofthe negative option • tapered distribution option for pulsed applications | | |
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| | | ecification | | |
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| | | 35 max. | | |
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| | | | | | | | | | | operating position | | any | | | | weight: | | | | | | board only | | 4g | | | | with socket, no flange | | 10g | | | | with socket and flange | | 14g | | | | resistor tolerances | | ±2% | | | | operating temperature range | -25°Cto+70°C | | | | humidity (non-condensing) | 93% RH maximum at 30 °C | | | | atmospheric pressure range | 100kPa(1 bar) to | | | | | | 68kPa (0.68 bar) | | | | applied voltage | | 1850 V maximum (subject | | | | | | to not exceeding max. rating | | | | | | of photomultiplier tube) | | | | | | | | | | |
| | | mounting option F (ie. C637AF) | | |
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| | | 2 holes, 4 dia. | | |
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| | | 35 crs | | |
| | | V | | |
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| | | 30 dia. | | |
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