Global Specialties Symbols and Terms The following symbols may appear on the product or in the documentation. Caution Symbol (ISO 7000-0434) – Statements or instructions that must be consulted in order to find out the nature of the potential hazard and any actions which must be taken.
Failure to comply with these precautions or with warnings elsewhere in this manual violates the safety standards of design, manufacture, and intended use of the instrument. Global Specialties assumes no liability for a customer’s failure to comply with these requirements.
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Global Specialties Only for use in pollution degree 2 environments where non-conductive pollution occurs except occasionally when a temporary conductivity caused by condensation is expected. Electrical Power CAUTION This instrument is intended to be powered from a CATEGORY II mains power environment. The mains power should be 115 VAC or 230 VAC (±10%) at 50/60 Hz.
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Global Specialties for repair. Notify Global Specialties of the nature of any contamination of the instrument.
Global Specialties Use Correctly Sized Wires CAUTION Use only standard 4 mm banana plugs when connecting to power supplies. Solid core wires no larger than 20 AWG must be used for connections to the solderless breadboards. Compliance and Certifications CE Compliance...
Alligator clips and similar connectors are seldom needed. Solderless breadboards on the PB-505A allow insertion of components or wires of up to 20 gauge. A detailed panel layout and description of the PB-505A is given in the section “Description of Individual Features”. Features & Applications The PB-505A Circuit Design Trainer is a robust electronics trainer suitable for all levels of electronics instruction and design.
Global Specialties • Oscillator Circuits • Timers • Function Generator Circuits • Logic Circuits • Gates • Counters • Flip-Flops • Analog-to-Digital Converters • Digital-to-Analog Converters • Medium Scale Integration Circuits • Phase Lock Loops • Operational Amplifiers Courseware Courseware is available separately through our website or as part of the PB- 505ALAB package.
Global Specialties Description of Individual Features In order to properly use the full capabilities of the PB-505A, it is highly recommended that the user become familiar with the panel layout and the features of the components. See Figure 1. AC Power Supply...
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AC Line Input The PB-505A can run off of 115 or 230 VAC. The unit comes standard with a 250 V / 1.5 A type T fuse for the 115 VAC setting. In order to use with 230 VAC, please slide the switch on back to 230 V and replace the fuse with a 250 V / 0.75 A type T fuse.
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DC offset controls for op amps, and timing circuit controls. All leads for both potentiometers are available and uncommitted. BNC Connector The PB-505A may be connected to other pieces of equipment via a BNC connector. This allows the use of shielded cable to minimize noise and interference. Switches Two single pole, double throw (SPDT) switches are provided for general switching functions.
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Global Specialties Logic Probe The logic probe is a tool used for checking the boolean states of logic, either 1 or 0. The red “HI” LED lights up for when the logic is high or a 1. The green “LO” LED lights up when the logic is low or a 0.
Global Specialties Specifications All specifications apply to the unit after a temperature stabilization time of 20 minutes over an ambient range of 20°C ± 5°C Description Specification AC Line Input 115 VAC @ 60Hz or 230 VAC @ 50 Hz (switchable) Fixed DC: +5 VDC 1.0 A max, current limited...
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Global Specialties Description Specification (8) Logic Switches select Logic High and Logic Low Logic Low Level: Ground Logic Switches Logic High Level: Switchable between +5 V and the variable positive power supplies Switches (2) Single Pole Double Throw (SPDT) - uncommitted : 16 LEDs;...
Global Specialties Checking out the PB-505A The PB-505A may be checked out for proper operation by making a few simple measurements and connections. Begin by connecting the AC line cord to a suitable receptacle. The two 7-segment displays should light when the power switch is turned Using a DC voltmeter, check for +5 V between the ground terminal and the +5 volt terminal.
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Global Specialties is released. Next, move the connections from PB1-1 to PB1-2, the NO point. Now the red LED should be lit when PB1 is not pressed, and the green LED should be lit when PB1 is pressed. Repeat these steps to test PB2.
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Global Specialties lead to ground. Observe low LED lighting and pulse LED lighting and staying on. Move pulse/ mem switch to pulse and observe pulse LED going out. Move TTL/ CMOS switch to CMOS, reconnect input lead to the +V terminal. With the +V pot fully counter clockwise, slowly turn the +V pot clockwise until the low LED goes out.
Breadboarding Techniques This section contains information which may prove useful when constructing circuits using the PB-505A. While there are no hard and fast rules for breadboarding, the following tips may save time and trouble. Unless a circuit is being prepared for a demonstration or display, avoid cutting component leads very short.
Warranty Information Limited Three-Year Warranty Global Specialties (a brand of Cal Test Electronics) warrants these products to be free from defective material or workmanship for a period of 3 years from the date of original purchase. Under this warranty, Global Specialties is limited to repairing the defective device when returned to the factory, shipping charges prepaid, within the warranty period.
Global Specialties Service If you have a need for calibration or repair services, technical, or sales support, please contact us: Global Specialties (A brand of Cal Test Electronic, Inc.) 22820 Savi Ranch Parkway Yorba Linda, CA 92887 800-572-1028 or 714-221-9330 globalspecialties.com...
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Global Specialties globalspecialties.com...
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