Controls
All controls and displays are available on the front and side of the OBB PMT housing.
Control Specifications | ||
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Display | LCD display of high voltage or signal | |
Controls | On/Off switch | |
BNC Connectors | Signal Out |
Physical Specifications
Dimensions (WxDxH) | 4 x 4 x 8 inches | |
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Weight | 4 lbs |
High Voltage Power Supply Specifications
Input | ± 15 VDC, 250 mA | |
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High Voltage | -200 to -1,100 VDC manually adjustable LCD displays actual cathode voltage | |
External High | 0 to +5 VDC (0 = -200 V, 5 = -1,100 V) | |
Voltage Adjust | Continuously adjustable | |
Input Regulation | ± 0.05% max. (for 15 V ± 1 V input). | |
Load Regulation | ± 0.05% max. | |
Ripple | 100 mV p-p max. | |
Temperature Coefficient | ± 0.01% max. (+5 to 40°C) | |
Drift | ± 0.03%/hr. max. (after 15 minute warm-up) |
Analog Mode Specifications
Gain Settings: | 1 µA = 1 V 0.1 µA = 1 V 0.01 µA = 1 V 0.001 µA = 1 V | |
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Time Constant Settings: (with Corresponding Analog Frequency) | 0.05 msec (20 KHz) 0.5 msec (2 KHz) 5 msec (200 Hz) 50 msec (20 Hz) 500 msec (2 Hz) | |
Offset Correction: | ± 50 nA | |
Signal Output on BNC connector: | Analog voltage |
Photon Counting Mode Specifications
Linear Dynamic Range: | 5 orders of magnitude* | |
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Dead Time: | 250 ns | |
Signal Output on BNC connector: | TTL |
* Linear dynamic range of the OBB photon counting PMT housing. The intensities were produced by attenuating the fluorescence emission of a fluorescein sample with neutral density filters.