1 INTRODUCTION This manual is designed to help you quickly and easily learn to use your Berkeley Nucleonics Model 507 current pulse generator. The 507 provides digitally controlled current pulses with currents from 0 - 25 Amps and pulsewidths from 100μs to 100ms. We also offer a long pulse version which holds up to 10A for 10μs - 500ms.
Custom Modifications The 507 is microprocessor-controlled and employs a flexible and expandable user-interface. New features and operating modes often can be added without hardware modifications by merely modifying the software contained inside the 507 - contact Berkeley Nucleonics for details. Safety Issues Normal use of test equipment exposes users to a certain amount of danger from electrical shock because testing must be performed where exposed voltage is present.
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as the on-off switch, fuses, power transformer etc., any time the equipment is connected to an AC outlet, even if the equipment is turned off. 6. Never work alone. Someone should always be nearby to render aid if necessary. Training in CPR first aid is highly recommended.
2 CONTROLS AND CONNECTORS This chapter explains the function of each control and connector on the 507. Front Panel The front panel contains the most frequently used controls and connectors. Display The 507 features a backlit liquid crystal display, which displays menu selections and settings.
There are two (2) output sections on the front of the 507; each consists of a pair of banana plugs, a BNC current monitor, a toggle switch, and a charge level indicator. Each output section is independently controlled and isolated from each other. Loads are connected to the banana plugs.
Sync Out This is a BNC connector which provides a TTL sync output when the instrument is fired. This signal is generated by the internal clock and therefore the actual pulse output will be delayed relative to the Sync Out as specified by the channel delay parameter.
GPIB Port (optional) The GPIB (IEEE 488) interface is available as an option with the 507. AC Input A standard EIC instrument-type cord should be used. The 507 is supplied with a power cord that fits the type of socket used in your country. Input requirements: 100-240VAC, 1A...
3 OPERATING INSTRUCTIONS This chapter presents detailed instructions on the operation of the 507. Overview The 507 provides digitally controlled, single shot, current pulses. The current is provided by a 3700mF capacitor bank charged to approximately 44V. The ability of the instrument to maintain the requested current will be load dependent, limited by the voltage and the stored energy.
Selecting Menu Items The menu items in the 507 are arranged in a set. Pressing the key will toggle between sets of menus, while the key will toggle between menu items within the current set. Hold down the Left arrow key to receive a short description of the current menu item.
Single Shot Mode During Single Shot operation, one pulse is generated each time the Run key is pressed. The rate at which pulses are produced is totally dependent on how fast the Run key is pressed. The delay of each of the outputs is relative to To (the internal clock).
n:Wid - Tn:Pulse Width Each of the two (2) channels has an independent pulse width setting which is set from the Tn:Wid menu, where n = 1, 2. Pulsewidths from 100μs to 100ms may be selected with a resolution of 200ns. *See custom features for Long Pulse option specifications.
Shot Counter The 507 includes a nine (9) digit shot counter. The maximum count displayed is 4,294,967,295 after which the count rolls over to zero. To manually reset the counter to zero, press the Left or Right arrow key. You will prompted to press the to verify that you want to zero the counter.
____________________________________________________________________ 4 COMPUTER INTERFACE The 507 comes standard with an RS232 serial interface; a GPIB (IEEE-488) interface is available as an option. All menu settings can be set and retrieved over the computer interface using a simple command language. Serial (RS232) Pinout The serial port is located on the back of the 507, and uses a 9-pin D-type connector with the following pinout (as viewed from the back of the 507): 1.
Command Protocol All commands have the following syntax: $<name> <##>CR where P $ indicates a command follows. P <name> is the command name. No spaces are allowed between the $ and the <name> . The name is case sensitive. <##> is an unsigned integer associated with the command. A space must be inserted between <name>...
where name = a valid command name. This will return an integer followed by a space, carriage return, and a line feed character (ASCII 10). Example - the following command would retrieve the current Cycles setting: $MODE ? The pulse generator will return the following: Echo Enabled: MODE ?<cr><lf>...
Command List The following table summarizes all the commands: 507 Communication Commands Command Parameters Description Name MODE 0 = Single Shot mode Sets the pulse generator mode. 1 = External Trigger mode T1:Ena 0 = Disable Enable/disable Channel 1 1 = Enable T1:Iamp 0 - 2500 Sets the current level, in 10's of mA (100 = 1A), for...
45 SPECIFICATIONS DELAYS P CHANNELS Two (2) independent outputs, with digitally controlled delay and pulsewidth. P CURRENT 0 to 25A (Bank voltage 44V minimum) RESOLUTION 10mA ACCURACY 50mA P DELAY 0 to 99.9999998s RESOLUTION 200ns P PULSEWIDTH 100μs to 100ms RESOLUTION 200ns P ACCURACY...
OUTPUTS (T1,T2) P IMPEDANCE 1.405Ω P SLEW RATE > 2.5A/μs P OVERSHOOT < 100mA + 10% of pulse amplitude P AMPLITUDE 0-25A (loads 1 - 10 ohm) P PEAK CURRENT 25A per channel P DC CURRENT LIMIT 150mA (each channel) COMPUTER INTERFACE P RS232 9600 Baud.
56 MAINTENANCE Except for fuse replacement, the 507 should require no maintenance. Replacing the Fuse A pair of fuses are mounted in the power entry module. To replace fuses, follow the instructions given below: 1. Unplug the 507 from power source and remove power cord from the back panel.
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