INSTRUCTION MANUAL FOR 83-469-001 Revision B MODEL SERIAL NUMBER LAMBDA EMI 405 ESSEX ROAD, NEPTUNE, NJ 07753 TEL: (732) 922-9300 FAX: (732) 922-9334
TABLE OF CONTENTS Description Page ................................................... 1.1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2 SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3 RETURNING EQUIPMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.
TABLE OF CONTENTS Description Page 6.6 CONTROL CHANNEL PROGRAMMING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 6.7 LIMIT CHANNELS PROGRAMMING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 ...................................... 7.1 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.2 CALIBRATION . . . . . . . . . . . . .
1 GENERAL INFORMATION 1.1 INTRODUCTION This manual contains instructions for the operation and maintenance of the BOS/S 100, 200, 400 Watt Bi-polar operational Source/Sink Power Supply series manufactured by Electronic Measurements, Inc. of Neptune, NJ. The BOS/S is a Bipolar Operational Source/Sink Amplifier, a true four quadrant power supply with high bandwidth capabilities. It utilizes the latest MOSFET technology for high slew rates and high efficiency.
for repair or replacement. Before returning any equipment to the factory, the following steps should be taken: 1. Notify Electronic Measurement, Inc., Customer Service Department, at telephone number (908) 922-9300. Give full description of the difficulty, including the model and serial number of the unit in question. Upon receipt of this information, EMI will assign a Return Material Authorization (RMA) and provide shipping instructions. 2.
1.4.5 COOLING REQUIREMENTS All BOS/S units use forced air cooling. The side and rear panels of the BOS/S must be clear from objects that could impair circulation, a minimum of 4 inches of clearance is required. Rack mounting is allowed provided air flow is adequate. 1.4.6 OVERTEMPERATURE PROTECTION An internal thermostat will disable the unit when the internal heatsink reaches 195°F. 1.
1.6 ELECTRONIC PERFORMANCE SPECIFICATIONS REGULATION Voltage 0.005% max. 0.005% max. 0.008 0.01%/c max. 3.00mV Line Regulation Load Change (100%) Time Temperature Coefficient Output Ripple MODEL 100 W BOS/S 20-5 BOS/S 50-2 BOS/S 100-1 200 W BOS/S 20-10 BOS/S 36-6 BOS/S 50-4 BOS/S 72-3 BOS/S 100-2 400 W BOS/S 20-20 BOS/S 36-12 BOS/S 50-8 BOS/S 72-6 BOS/S 100-4 BOS/S 200-2 Max DC DC Output Range Eo Io Bandwidth* DC to F<3 dB Full Power V Current 0.005 1.0 mA 0.008 0.03%/c 0.
1.7 MECHANICAL SPECIFICATIONS Page 5 of 24 83-469-001 Rev.
2 INSTALLATION 2.1 INITIAL SETUP AND TEST Before connecting the unit to the powerline, the user should verify the line cord is of the proper gauge (Refer to para. 1.2.2 for loading requirements) and the safety ground is connected. The user should verify the unit is configured for the proper input voltage. To determine the proper configuration check the top of the unit for appropriate marking. 2.
2.3 VITAL FUNCTIONS TEST After the appropriate line voltage has been applied to the BOS/S, it may be desirable to do a VITAL FUNCTIONS TEST to verify that no damage was sustained during shipment. VOLTAGE MODE A) Ensure that the voltage sensing leads are connected. B) Switch the V/I switch to V. C) Switch the VOLTAGE INT/EXT to INT. D) Rotate the VOLTAGE CONTROL POTENTIOMETER fully clockwise. E) Rotate the +V LIM POTENTIOMETER fully clockwise, -V LIM POTENTIOMETER fully counter clockwise.
3 OPERATION 3.1 CONNECTING THE LOAD The load can be connected to the front or rear panel of the BOS/S. The front panel connection is a 5 way binding post and the output at the rear panel is located on TB2 labeled Plus (+) and Minus (-). (See Drawing 02-469-001.) The load must be connected with wires of the appropriate gauge avoiding excessive lengths and bundling, reducing reactive components. When possible, twist the load wires to reduce noise from stray fields. 3.
Figure 3.2.1 Remote Sensing 3.3 CONSTANT VOLTAGE MODE OF OPERATION To enable the constant voltage mode of operation set the V/I switch (Item 6) to the “V” position. The unit can now be controlled manually or via an external voltage source. 3.3.1 MANUAL OPERATION The manual mode of operation is enabled by setting the voltage input switch (Item 8) to “INT”. To adjust the output voltage turn the “VOLTAGE CONTROL POTENTIOMETER” (Item 9) to the desired voltage.
Figure 3.3.3.1 Voltage Channel External Gain Select In normal operation, there are jumpers between TB1-7 and TB1-8, TB1-9 and TB1-10. This jumper configuration makes the OP-AMP and INVERTING amplifier with a gain of -1. To change the gain of the amplifier, remove the link between TB1-7 and TB1-8 and insert an external resistor between TB1-7 and TB1-8.
Switching the CURRENT INT/EXT to EXT, enables the BOS/S to accept an External Current Control Signal. The EXT CURRENT SIGNAL is input on the red and black binding posts labeled “EXT CURRENT PROGRAMMING INPUT” (Item 15, dwg 02-469-101). The control signal is connected to the red binding post, and the common is connected to the black post. Fullscale programming is ±10V with respect to common. The output is directly proportional to the input signal. Rear Panel Detail 1. SPARE 2. I GAIN R 3.
3.5 CURRENT CHANNEL EXTERNAL GAIN SELECT The current channel gain can also be modified through external resistance. current channel preamplifier and TB1 are configured as follows: The Figure 3.5 Current Channel External Gain Select In normal operation there are jumpers between TB1-2 and TB1-3, TB1-4 and Tb1-5. To change the gain of the amplifier, remove the link between TB1-2 qnd TB1-3. Insert an external resistor between TB1-2 and TB1-3.
3.7 VOLTAGE AND CURRENT MONITORS The V monitor and I monitor each have a ±10 Volt fullscale voltage, which is proportional to the unit’s output. The voltage monitor is present at TB1-20, using TB1-24 as common. The current monitor is present at TB1-19 using TB1-24 as common. 3.8 EXTERNAL INTERLOCK An external interlock function can be achieved by providing a dry normally open (NO) contact between TB1-21 and TB1-22 which will cause the front panel circuit breaker to trip. Page 13 of 24 83-469-001 Rev.
4 THEORY OF OPERATION 4.1 GENERAL 1. The BOS/S THEORY OF OPERATION shall describe the following major sections. 2. A200 Output Stage 3. A100 Control Board 4. Simplified Schematic, Voltage Channel 5. Simplified Schematic, Current Channel 6. Voltage Channel Signal Flow 7. Current Channel Signal Flow 8. ±10 VDC Precision Reference 9. Active Limit Circuitry 4.
Figure 4.3.1 A100 Control Board Simplified Schematic Voltage Channel Figure 4.3.2 A100 Control Board Simplified Schematic Current Channel Page 15 of 24 83-469-001 Rev.
4.3.1 A100 VOLTAGE CHANNEL SIGNAL FLOW The Voltage and Current Modes provide both Internal or External Control. The chosen signal is fed into the Voltage Preamplifier. The now inverted signal flows to the error amplifier and compares it against the output voltage. The error amplifier’s output drives the A200 PCB, providing the proper output voltage. 4.3.2 A100 CURRENT CHANNEL SIGNAL FLOW In the Current Mode, the input control signal is selected between Internal and External.
5 BOS/S DIGITAL CONTROLLER BOARD 5.1 INTRODUCTION TO THE BOS/S DIGITAL CONTROLLER BOARD The following contains all instructions for operation of the BOS/S Digital Controller Board. This board is a factory-installed option for remote computer control of the BOS/S power supply, manufactured by Electronic Measurements. 5.2 GENERAL DESCRIPTION The BOS/S Digital Controller Board provides a means to remotely computer control an Electronic Measurements, Inc. BOS/S Power Supply.
6 OPERATING INSTRUCTIONS FOR THE BOS/S CONTROLLER 6.1 GENERAL The BOS/S controller is designed to functionally duplicate all of the controls on the front panel of a BOS/S power Supply. These controls select the control programming mode (Voltage or Current), control channel programming level, and positive and negative limit channel programming levels. The only requirement is that the front panel external programming inputs (Voltage and Current) be open when using the BOS/S controller.
The baud rate is user selectable. However the BOS/S controller requires an 8-bit word, 1 stop, and 1 start bit for proper communications. There is no hardware handshaking, a properly received character will be echoed back over the RS232 line assuming that the echo function is enabled. The default is to echo all characters, this is modified using the SET BACKTALK COMMAND. SB1 = echo on SB0 = echo off 6.
This is the full model number of the BOS/S supply, including its serial number. “?S” will return the last command string sent to the BOS/S controller. This can be useful for debugging command sequences or verifying correct command reception. 6.5 MEASUREMENT COMMANDS The BOS/S controller is capable of measuring the output voltage and output current of the power supply. The optional A/D converter will provide either 16-bit or 12-bit resolution.
Programming in Volts or Amps. Programming as a percentage of full scale. Programming the DAC directly in hexadecimal. The control channel programming commands are of the following forms: Direct programming (Volts or Amps): “Program Control +10.000” = “PC+10.000” = “PC10” = Program to +10.000 Volts or Amps “Program Control -5.432” = “PC-5.432” = Program to -5.432 Volts or Amps. “Program Control 0.000” = “PCO” = program to Zero. Percentage full scale programming (-%99.99 to +%99.99): “Program Control %50.
“Program Limit +ff” = “PL+ff” = Program +Limit to full scale “Program Limit -80” = “PL-80” = Program -Limit to half scale “Program Limit -00” = “PL-00” - Program -Limit to zero Hexadecimal programming (00h to ffh, 00 to -ffh) “Program Limit -%99” = “PL-%99” = Program -Limit to full scale “Program Limit +%50” = “PL+%99” = Program +Limit to half scale Interval Programming Commands The BOS/S controller allows the programming of up to 1001 intervals.
“Interval Duration iiii” = “IDiiii” = Set Interval pointer to point at interval iiii, where iiii is an integer from 0 to 65535. If iiii is omitted, the default duration is 0. The Pointer is selected using the following syntax: “Interval Pointer iiii” = “IPiiii” = Set Interval pointer to point at interval iiii, where iiii is an integer from 0 to 1000. “Program Interval” = “PI” = Begin interval programming.
7 MAINTENANCE AND CALIBRATION 7.1 GENERAL A regularly scheduled preventive maintenance schedule is recommended for the BOS/S series of power supplies. This should consist of wiping the wrapper to prevent dust build up in the air vents and the cabinet which the BOS/S is installed. 7.2 CALIBRATION The BOS/S power supplies are fully calibrated at the factory and do not normally require recalibration. The following are the only calibrations that may be performed in the field.
