Tenma 72-8795 User manual
Contents
1. TENMA 72 8795 PROGRAMMABLE DC POWER SUPPLY TENMA Uses Ha 405 S Pioneer Blvd Springboro OH 45066 7 2 8 7 9 5 Programmable DC Power Supply Series PROGRAMMABLE DC POWER SUPPLY Thanks for using our products Please read this manual thoroughly before operation CONTENTS CONTENTS Safety Symbols 2 22 e cere etter nenn nn 3 Product Introduction nn un m nn nn eee eee eee 4 Product Overview 2 nn nn nn nn nn nn 4 AdditionalFeatures_ 2 ee ee eee eee ce rs 4 Specifications of Product e r ttt ttt nn nn nn nn 5 Precautions before operation 6 Unpacking ee eee iin nun nn nn nn nn 6 Checking the Voltage u nn nn nn nn 6 Operating Environment 7 Panel Introduction eee eee eee eee 7 9 Layout of the Front Panel 7775757577575755 57575 7 7 7 7 7 Layout of the Rear Panel lt m oaan a seer ss ee ee nn 8 Function Description ttt tt ttre 8 9 Operating Instructions een 10 12 Output Voltage Setting nun nn nn nn eee ee eee 10 Output Current Setting Hu nn nennen 10 OCP Setting mann nennen n nennen ran 11 Voltage Current Step Setting un n nn nn 11 Data Storing and Recalling Setting 5 11 Automatic Sequence Mode 2 2 11 Series and Parallel Operation 2 5 12 Communication Settings Ten 12 Mainten2. desired channel by pressing SHIFT CH to set the cursor to toggle that channel Method 1 Set output voltage by pressing V SET and using the number and decimal keys to key in voltage value then press ENTER Method 2 Press V SET press the rotary knob once and turn the rotary knob to input voltage value The output voltage setting is changed immediately during selection Press ENTER to save the voltage setting 32 00V 3 000A V 3 000A 32 00V 3 000A 06 00V 3 000A Shift INDEP OCP 32 00V 3 000A 06 00V 3 000A 2 Example To setvoltage at 18 50V Press V SET 1 8 5 0 ENTER 2 Output Current Setting Select the desired channel by pressing SHIFT CH to set the cursor to toggle that channel Method 1 Set output current by pressing I SET and using number keys to key in current value then press ENTER Method 2 Press I SET press the rotary knob once and turn the rotary knob toinput current value The output current setting is changed immediately during selection Press ENTER to save the current setting 32 00V 3 000A 32 00V 3 000A 06 00V 3 000A 32 00V _ AP LINDEP 32 00V 3 000A zer 06 00V 3 000A 2 TENMA PANEL INTRODUCTION ip WARNING To avoid electrical shock make sure the power cord has been securely connected to a properly grounded outlet A CAUTION To avoid personal injury and damage disconnect the power cord before r
3. ances ee ee eee ee Se eee E eee See ees 13 15 Fuse Replacement 7 77 ttt ttt tt ttt eee 13 Adjustment and Calibration 9 een nn nn nn nn 14 Cleaning SH SS ERS Teen 15 TENMA GENERAL MAINTENANCE Step 3 After zeroing the voltage of the three channels which are also saved move the cursor to CURRENT of CH1 Connect the ammeter and adjust the knob to make the current reading equal OMA Then press ENTER to store the calibration data of the corresponding channel Move the cursor down to zero and calibrate the current of channel 2 and channel 3 with the same procedure ZERO CALIBRATION H CH1Votage Current CH2Votage Current CH3Votage Current Step 4 After completing step 3 move the cursor to the left press key 2 cursor down until the calibration interface reads Output Calibration Move the cursor to a corresponding channel and adjust the output voltage by using the rotary knob to equal 32V reading on the voltmeter Press ENTER and then the calibration data of the corresponding channel is stored Move the cursor down into the calibration of the other channels with the same procedure with channels 1 and 2 at 32 V and channel 3 at 6 V OUTPUT CALIBRATION 4H CH1Votage Current CH2Votage Current CH3Votage Current Step 5 After completing the maximum voltage calibration connect the ammeter and adjust the current of channel 1 to equal 3A Press ENTER to save the current of the channel Then move th
4. at is designed for a communication interface by RS 232 or USB to computer to enable advanced testing and power delivery by programmable control The voltage and current are controlled by a 12 bit D A Converter with high resolution and accuracy Also the digital interface provides a speedy precise and convenient input of information controlled by intuitive controls The adjustment of voltage current is made by software calibration eliminating potential manual fault that increases the precision of the instrument Over Voltage Protection OVP and Over Current Protection OCP can be set with the software and utilized by the hardware to achieve precise instant protection to prevent damage and increase the users safety We warrant this unit to be free from manufacturer material and workmanship defects for one year from the original date of purchase within North America If the unit fails during normal use withing the warranty period please contact the authorized reseller of this product for repair or replacement This warranty does not apply to defects and failure resulting from customer actions such as mishandling misapplication overloading power or current unauthorized repair or any modification The reseller and manufacturer hold the right to deny any warranty claims based on these reasons or to fulfill warranty with a similar product at a similar value Additional Features e Programmable power supply with a digital interface e Three s
5. ates in series or parallel output modes channel 2 operates as the master CH1 and CH2 will output the settings for Ch2 In independent mode each channel will output it s own individual settings AAM 9 ANX0A OUT SET INDEP OUT lt Independent Output Mode PARA OUT SERIES OUT Ov vuv 3 vu0A Note The following indexes are tested after unit being powered for 20 minutes Specifications 72 8795 0 32Vx2 Vol f oltage aay Output Current 0 3Ax3 Voltage lt 3mV lt 8mV rated current gt 3 0A Load Effect Current lt 3mA lt 5mA rated current gt 3 0A Voltage lt 3mV AC 5 Power Effect 8 Current lt 3mA 3 Voltage 10mV Resolution Current 1mA 2mA rated current gt 3A Set Voltage lt 0 05 10 mV 20 mV rated voltage gt 36V Accuracy 25 5 C Current lt 0 1 5ma 10 mA rated current gt 3 0A Vol Ripples1 mVrms Ripple oltage pp 20Hz 20MHz Current lt 3mArms lt 5mArms rated current gt 3 0A Temperature Voltage 100ppm 3mv Coefficient 0 40 C Current 100ppm 3mA Read back Voltage 10 mV Resolution Current 1mA 2mA rated current gt 3 0A Voltage rise 10 90 s 100ms Response Time Current fall 90 10 lt 10ms 210 rated load Readback Voltage lt 100ppm 10 mV Temperature Coefficient Current lt 150ppm 10 mA Voltage lt 100ppm 10 mV Drift Current lt 150ppm 10 mA Serial Serial synchronous lt 0 1 20 mV synchronous error opera
6. ceed the setting value the instrument will operate in the C V mode 3 Over Current Protection Setting Press OCP to turn on the OCP mode OCP modeis can be turned off by pressing SHIFT OCP 4 Voltage Current Step Setting While using the rotary knob for changing value pressing F C will switch between macro and micro incremental values to either rapidly change or fine tune values 5 The data storage and call setting 5 1 The data storage setting Press SHIFT STORE to access the data store menu screen Use the rotary knob to select the channel group and then press ENTER Move the cursor selection by pressing the direction key 8 2 4 6 to select voltage current and delay time press ENTER then you can input data directly Press ENTER again to store STORE SET CH1 STORE En CIRE 1 32 00 V 2 000A 0001S o OcP 2 43 50 V 1 253A 0002S CH3 STORE 5 3 55 19 V 1 376A 0002S u OFF 1 39 NNI 9 ang Sate INDEP Example To set output voltage current and delay time of the CH1 memory of 01 to be 15 00V 3 00A 20S Press SHIFT STORE to access menu screen and us rotary knob to select Ch1 STOREI Then press ENTER to access CH1 storage interface move the cursor to the voltage and press ENTER to input voltage with number keys or rotary knob and then press ENTER to store data Repeat for current and delay settings Press SHIFT STORE to store all settings OPERATION Operation 1 Output Voltage Setting Select the
7. e cursor to carry on with the current calibration and storage of channel 2 and channel 3 OUTPUT CALIBRATION 4H CH1Votage Current CH2Votage Current CH3Votage Current 3 Cleaning When the unitis unplugged use a damp cloth or mild cleanser to wipe the housing Never use an abrasive cloth or harsh solvents as these will damage the housing of the instrument GENERAL MAINTENANCE 2 Adjustment And Calibration 2 1 1 Preparation a Power unit on and allow 30 minutes to warm up before calibration b Ambient temperature 23 5 C Humidity Less than RH80 c Select a reliable six and a half digital voltmeter with a current test range more than 5A 2 1 2 Output Calibration Steps Step 1 Press SHIFT 4 to display Password input window input Password 293856 by using the number keys and the Calibration window will appear If an incorrect password is entered the unit returns to the home screen Password kkkkkk Step 2 Control the cursor by using the arrows assigned to the 8 2 4 6 keys Set the cursor to the calibrated item of the corresponding channel and using a connected voltmeter for correct readings use the rotary knob to adjust parameters and regulate the voltage of the corresponding channel to a OV reading on the voltmeter Press ENTER to store the calibration data of the corresponding channel Move the cursor down to calibrate the other channels with the same procedure Tip Use the F C featu
8. emoving the fuse holder 3 Operation Environment The working ambient temperature range of this instrument is from 0 to 40 C 32 to 104 F Do no operate the instrument outside of this range Extreme temperatures can cause damage to the unit Panel Introduction Layout of Front Panel OO O FUNCTION LAYOUT Layout of Rear Panel Function description as below 1 POWER Toggle main unit power on off Displays output voltage and current power settings DISPLAY 7 and volume OVP and OCP statuses 3 CH1 OUT CH1 output terminals 4 CH2 OUT CH2 output terminals 5 CH3 OUT CH3 output terminals 6 GND Terminal Ground terminal connecting to CASE Press and turn to incrementally adjust power settings Rotary Knob turn to cycle through menus and setting Set Output voltage 8 V SET CH1 SHIFT CH1 to select Channel 1 settings Set Output current 9 SET CH2 SHIFT CH2 to select Channel 2 settings Set Over voltage Protection value 10 OVP SET CH3 SHIFT CH3 to select Channel 3 settings TENMA FUNCTION LAYOUT Change incremental tuning value of the rotary knob SHIFT Step to change the incremental steps 11 FAC SIER of the rotary knob Recall the stored settings 12 RECALL STORE SHIFT STORE to edit and save channel settings Tog
9. eparately adjustable linear outputs e The 192x64 LCD Display can display multiple settings and measurements simultaneously e Windows based interface for user friendly operation High stability and low drift Over Voltage Current and Temperature protection Intelligent fan control adjusts with output power e Built in warning buzzer e Accurate user calibration software e Space saving design e Fine adjustment knob e 90 setting memory e Parallel series and independent operation modes e 1 second timing resolution TENMA GENERAL MAINTENANCE 32 AA 9 AN OUT SET 3 INDEP OUT lt Parallel Output Mode SERIES OUT F Oo VUV J UU 32 AA 9 AN OUT SET 3 INDEP OUT SERI_ Serial Output Mode PARA OUT SERIES OUT 00 vuV 3 UU 8 Communication Setting Press SHIFT COMM to access the interface for the communication setting Use the key directions to move the cursor to the corresponding value place You can set the power address communication speed and data bit by using the rotary knob to change the values Press ENTER to store and exit a ANALY 9 AN INTERFACE 0A 3 Saun 19200 OA DATA 9 F 04 IUV uv0A General Maintenance To avoid electrical shock do no perform any service or repair other than those outlined in these operating instructions Any additional attempts at servicing or modifying this unit voids all manufacturer warranty and liability 1 Fuse Replacement If
10. gles automatic execute mode 13 AUTO COMM SHIFT COMM to access the interface of the communication settings INDEP Switch to independent output mode 14 PARA SER SHIFT PARA SER to switch to Parallel or Serial output mode OCP Turn OCP on or off 15 OVP RESET SHIFT RESET key to clear over voltage protection Press first to access the second assigned function 16 SHIFT of a button SHIFT CONTRAST to access the display contrast settings 17 CONTRAST use the rotary knob to adjust press ENTER to exit setting 18 SHIFT to toggle the audible alert on or off 19 T Move the cursor upward by pressing in the storage settings 20 y Move the cursor downward by pressing in the storage settings 21 4 Move the cursor on the left by pressing in the storage settings 22 Move the cursor on the right by pressing in the storage settings Turn on or off output if a channel is selected 23 OUTPUT you can turn on or off the corresponding channel when you select no channel all channels on turned on or off 0 9 24 ENTER Data entry ENTER Value output 25 W o Press SHIFT w to restore factory settings 26 AC Power Socket AC power input terminal 27 Cooling Fan Cooling Fan 28 USB communication interface Interface 29 RS232C communication interface
11. re to switch between broad and precise incremental control Zero Correct H CH1Votage Current CH2Votage Current CH3Votage Current TENMA SAFETY SYMBOLS Safety Symbols WARNING Warning statements identify conditions or practices to avoid electric shock that could cause personal injury or death CAUTION Caution statements identify conditions or practices that could result in damage to this product or other property Ground Ground terminal er PP Frame or chassis ground terminal IN Safety Precautions 1 Pressure shock abuse and vibration should be avoided 2 Do not dismantle alter or repair this unit yourself This could easily damage the unit and could cause further property damage injury or electrical shock 3 This unit was designed to be used with 110 volt power Note the maximum power and amperage settings and fuse specifications for use with this product 4 This unit uses three linear power supplies and has been designed to ensure that the machine casing and power are properly grounded when used with a grounded outlet 5 Never use around high moisture areas never submerge in water and never use with wet hands 6 Range of operating temperature is 0 C 40 C 32 F 104 F do notuse in high temperature high humidity high radiation and areas with magnetic interference PRODUCT INTRODUCTION Product Overview 72 8795 Programmable Power Supply is controlled by a Micro Processor Unit MPU th
12. the fuse blows the display will not light and the power supply will not operate Replace the fuse with a compatible rated fuse The unit was originally supplied with a 5 Amp 250V glass type fuse The fuse compartment is located at the AC plug terminal AN WARNING Replace fuse only with 250V fuse ofthe specifictype and rating and always disconnect power cord before replacing fuse TENMA Technical specifications OPERATION TECHNICAL SPECIFICATIONS 5 2 Sequence range activation After setting all needed values and delays move the cursor over the delay value of the last step in the sequence to be used and press AUTO and a box should appear after the value After the automatic sequence reaches this step it will return to the first step and continuously repeat the sequence 6 Automatic sequence execution From the home screen press AUTO which will set the unit to AUTO mode Press OUTPUT to activate the selected and stored settings the unit then will output the sequences of t voltage current and delay parameters The unit will continued to run through the sequences Press AUTO to stop the automatic sequence 32 00V 3 000A lt Programming Output Mode 32 00V 3 000A 06 00V 3 000A Series and parallel operation mode Press SHIFT PARA SER to select between operation modes Use the rotary knob to select the desired output mode Press ENTER to confirm and return to the main screen When the unit oper
13. tion Series Load 20 mA TECHNICAL SPECIFICATIONS o Set Voltages0 05 20 mV Accuracy Currents0 1 20 mV Parallel Voltage lt 5mA Simultaneous Load regulation Currents6mA Operation Power Voltages3 mV regulation Currents6mA Memory Store Recall points 0 90 Setting time 1s 9999s Timer Resolution 1s Function Auto Step running Interface RS232 USB interface Physical Dimensions 230 W x140 H x380 L mm Specification Weights 10Kg 22 Ibs Operation Environment Indoor use Altitude up to 2000 m Precautions before operation 1 Unpacking the Instrument The product has been fully inspected and tested at our factory before shipping Please carefully unpack and inspect it to check if there is any damage that may have occurred during transportation If any signs of damage are found please contact our customer service team before operation 2 Power requirements The product has been designed to be used with 110V 60Hz power supplies Make certain that the power supply and outlet are properly grounded before use Do not modify the power plug or cord in any way Use only the power cable that is included in the packaging ora direct replacement TENMA OPERATION Example Set current at 1 500A Press I SET 1 0 0 0 ENTER If the load current through output terminals exceeds the setting value the instrument will operate in the C C mode if load current does not ex
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