LPS 305 Linear Programmable Power Supply User’s Manual
CONTENTS 1. GENERAL INFORMATION........................................................................................................... 1 1.1 1.2 1.3 1.4 1.5 1.6 2. Introduction ................................................................................................................................. 1 Safety Considerations ................................................................................................................ 1 Options ..................................................
1. 1.1 GENERAL INFORMATION Introduction This section contains a general description of your power supply as well as its performance specifications. Information about options and accessories are also provided. The TPS-3025 series has been designed and tested according to EN-61010-1, Safety requirement for Electronic Measuring Apparatus. 1.
Under certain conditions, dangerous voltages may exist even with power cable removed. To avoid injuries, always disconnect power, discharge circuits and remove external voltage sources before touching components. DO NOT SERVICE OR ADJUST ALONE Do not attempt internal service or adjustment unless another person, capable of rendering first aid and resuscitation, is present. DO NOT EXCEED INPUT RATINGS This instrument must be connected to a properly grounded receptacle to minimize electric shock hazard.
1.3 Options Options 01 determine which line voltage is set at the factory. This information is on the rear panel label. Option 01: RS-232 Interface Option 02: Rack mount Shelf 1.4 Accessories Power cable Operation manual Fuse 1.5 Output Isolation The output of the power supply is isolated from earth ground. Either output terminal may be grounded or the output may floated up to +/- 240 Vdc (including output voltage) from chassis ground 1.
Ripple/Noise (p-p) Transient Response 10mVp-p 20mVp-p 200s Typical 100ppm / ℃ Typical Temperature Coefficient CONSTANT CURRENT CHARACTERISTICS (at rated output : 2.
2. 2.1 INSTALLATION Introduction This section contains instructions for checking and mounting your power supply and connection your power supply to AC power. The power supply generates operating magnetic which may affect the operation other instruments. If your instrument is susceptible to operating magnetic fields, position it more than three inches from the power supply. 2.2 Initial inspection Your supply was thoroughly inspected and tested before shipment.
3. 3.1 GETTING STARTED Front panel controls and output terminals Note：most soft keys have two functions. The first function of the key is function entry (i.e. + Vset, -Iset, Tracking etc.)The second function for the soft keys is data entry (ji. E. 0~9). REFER TO THE FIGURE A. (1) LCD display : Displays alphanumeric information with status annunciators. A detailed listing of descriptions is presented in section 3.2. (2) Power on/off : Powers on the unit.
point key. (15) Beep (3) : Beeper control key which toggle the beeper on or off. Numeric entry key for number three. (16) Enter : Enter the values on the display for the specified function and return the display to output-off mode or metering mode. (17) Clear : Used in conjunction with the numeric entry keys to clear partially set commands. Also returns unit to the previous mode. (18) output(on/off) : mode control key which toggles the output on or off simultaneously.
1 7 3 8 4 9 5 6 10 LPS - 305 +VSET CV CC CV CC INDEP TRACK 5V 3.3V +ISET 7 8 -VSET -ISET 4 5 TRACK 1 + + 9 6 BEEP 2 3 ±OUTPUT 0 POWER ON I ±240 Vc MAX O OFF 2 5V/3.3V 24 COM2 COM1 23 11 12 22 14 21 13 20 16 19 15 FIGURE A 3.2 LCD display message REFER TO THE FIGURE B. 3 1 CV CC CV CC INDEP ALL OUTPUT OFF 20.00V -15.00V TRACK 5V 3.
STATUS ANNUNCIATORS Position 1: Position 2: Position 3: Position 4: Indicator of CV mode or CC mode of + output (positive). It will flash when the output is enabled. Indicator of CV mode or CC mode of - output (negative). It will flash when the output is enabled. Indicator of the independent mode or tracking mode. Flashing cursor implies the unit is working normally. Indicator of the selected output 5V or 3.3V. It will flash when the output is on.
4. 4.1 OPERATION Initial conditions When AC voltage is applied, the power supply undergoes a self-test and disables all outputs by default. The display will show an “ALL OUTPUT OFF “ message along with the + Vset and – Vest values as shown in Figure 4.1. CV CC CV CC INDEP ALL OUTPUT OFF 0.00V -0.00V TRACK 5V 3.3V FIGURE 4.1 4.2 Control of output functions The power supply will accept programming values directly in volts or amps.
when the selected output is disabled. 4.3 Enabling/Disabling the output The selected output channel can be turned on and off from the front panel. The output on/off key toggles both the +output and –output on and off simultaneously. The “.” key toggles the 5V or 3.3V output on and off. An output disabled by the output on/off key will be have as if it were programmed to zero volts. 4.4 Overload protection of 5V or 3.3V output When the 5V or 3.
5. CALIBRATION Calibration steps: Equipment needed for calibration: DMM, such as Fluke model 45 or HP 34401A. Step 1: Simultaneously press the “8” and the “ -▼ ” keys on the Keypad and the following message will Appear on the LCD: CV CC CV CC INDEP +V Lo=09.487 ADC GET=01036 TRACK 5V 3.3V Step 2: Measure the DC voltage from the +output terminals (+ and COM1) with the DMM and key in the measured value (i.e. if the DMM shows 9.487V then key in 9.487) followed by the “ENTER” key.
Step 4: Measure the DC current from +out terminals (+ and COM1) with the DMM and keyin the value (i.e. if the DMM shows 0.728A, then keyin 0.728 ) followed by the “ENTER” key. The following message will then appear on the LCD: CV CC CV CC INDEP +I Hi=2.491 ADC GET=02579 TRACK 5V 3.3V Step 5: Repeat step 4. Keyin the measured value (i.e. if the DMM shows 2.491A then keyin 2.491) followed by the “ENTER” key.
CV CC CV CC INDEP ADC GET=00200 -I Lo=0.624 TRACK 5V 3.3V Step 8: Measure the DC current from –output terminals ( - and COM) with the DMM and keyin the measured value (i.e. if the DMM shows 0.642A then keyin 0.642) followed by the “ENTER” key. The following message will then appear on the LCD: CV CC CV CC INDEP ADC GET=02503 -I Hi=2.418 TRACK 5V 3.3V Step 9: Repeat step 8. Keyin the measured value (i.e. if the DMM shows 2.418A, then keyin 2.418) followed by the “ENTER” key.
6. USER MAINTENANCE/SERVICE 6.1 Fuse Replacement If the fuse is suspected of being defective, it should be inspected and, if necessary, replaced. To inspect or replace the fuse, please perform the following steps: (1) Disconnect the AC line cord from the unit to reduce electrical shock hazard. (2) Remove the fuse by sliding out the fuse holder. The fuseholder is beneath the AC Receptacle. Test the fuse for electrical continuity with an ohmmeter.
Command OUT TRACK STATUS CALI MODEL VERSION HELP BEEP VDD Description 0=+/- output off 1=+/- output on 0= independent 1= tracking from ch1 2= tracking from ch2 Working status(see note7) 0=Reset 1=begin calibration 2=input calibration parameter Display model no. Display version no. Display command list 0= beeper function off 1= beeper function on 0= digital output off 3= digital output 3.3V 5= digital output 5V Example OUT0 OUT1 TRACK0 TRACK1 TRACK2 STATUS CALI0 CALI1 CALI2 9.
Bit 9: Bit 10: 0:beeper function off 1:beeper function on 0:CC output compensated off 1:CC output compensated on 17
ZOM-305MI-1B
