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5. Maintenance

5.1 Inspection



Inspect the instrument at regular intervals so that it maintains its initial performance for a long time.



Check the input power cord for damage of the vinyl cover and overheating of the plug and cord stopper. Check

the terminal screws and binding posts for loosening.

5.2 Fuse Replacement

Step

(1)

Take off the power cord and remove the fuse socket using a minus driver.

(2)

Replace the fuse in the holder.

Fuse rating

220V: For models 30V/20A and 60V/10A: T4AL/250V

For models 15V/60A, 30V/30A and 60V/15A: T8AL/250V

110V: For models 30V/20A and 60V/10A: T8AL/250V

Содержание eTM-K Series

Страница 1: ...Programmable Switching DC Power Supply Operation Manual V1 0 eTOMMENS INSTRUMENT ...

Страница 2: ...ut Voltage Setting 5 3 4 Output Current Setting 5 3 5 Over Voltage Protection Setting 5 3 6 Over Current Protection Setting 6 3 7 Output Delay Time Setting 6 3 8 Function Setup 7 3 9 Auto Running Operation 10 3 10 Output On Off 11 3 11 Panel Lock 11 3 12 Rotary Knob 11 3 13 Protection Function 11 3 14 Operation Mode 12 4 Remote Control 14 4 1 Interface Setting 14 4 2 SCPI Commands 14 5 Maintenance...

Страница 3: ...anty items except the one being provided by this summary and the warranty statement The warranty items include but not being subjected to the hinted guarantee items related to tradable characteristics and any particular purpose We will not take any responsibility in cases regarding to indirect particular and ensuing damage such as modifications to the circuit and functions by the users repairing o...

Страница 4: ...oid electrical shock Fuse Fuse type please refer to section 5 2 for details Make sure the correct type of fuse is installed before power up Replace the AC fuse with the same type and rating as the original fuse Disconnect the power cord before fuse replacement Make sure the cause of fuse blowout is fixed before fuse replacement Cleaning Disconnect the power cord before cleaning Use a soft cloth da...

Страница 5: ... be connected to the Earth terminal marked with the letter E or by the earth symbol or coloured Green or Green Yellow The wire which is coloured Blue must be connected to the terminal marked with the letter N or coloured Blue or Black The wire which is coloured Brown must be connected to the terminal marked with the letter L or P or coloured Brown or Red If in doubt consult the instructions provid...

Страница 6: ...led by keyboard The adjustment of voltage current is made by software calibration without manual error that will increase the preciseness of the instrument 1 2 Features High accuracy high resolution Over load over voltage over current over temperature and reverse polarity protections CV and CC operations auto CV and CC switch 122 32 backlit LCD display High speed rotary dial and keypad input Built...

Страница 7: ...ront Panel 1 Power switch 2 Function button and Numeric button 3 Output terminals 4 Remote sensing terminals 5 Rotary knob 6 LCD display 7 LED indicator Fig 2 1 2 Rear Panel 1 RS 232 interface 2 Cooling fan 3 Power cord fuse socket 4 Ground terminal of chassis ...

Страница 8: ...nput digit 9 Input decimal point Clear Exit ProtClear clear protection Menu Select menu I set Set current V set Set voltage ListRun Turns on off the auto run programs OCP Set Over Current Protection value OVP Set Over Voltage Protection value Shift Select the second function Lock 1 Lock the front panel 2 Switch to local operation On Off Turn on off output Move flash digit to the left right Move fl...

Страница 9: ...ex by using the rotary knob because voltage or current value may be multi digit It is very convenient to use the step input method Every press on the corresponding button makes the voltage or current increase or decrease by a step value The input value is validated automatically without pressing Enter button For example to generate a series of voltage with interval 1 1V press buttons sequentially ...

Страница 10: ...00A Press I set 3 2 0 0 Enter 3 5 Over Voltage Protection Setting The Over Voltage Protection OVP function protects the power supply and DUT from damage caused by voltage over the setup voltage Before operation set the OVP function ON and set the OVP value When the output voltage exceeds this value the output will be shut down and OP indicator will light on With OVP function ON the output voltage ...

Страница 11: ...own and OP indicator will light on With OCP function ON the output current is restricted within the OCP range 3 6 1 OCP Value Setting Press OCP button until OCP Set is shown on the LCD Setting method 1 Press numeric buttons 0 9 Decimal Point Enter to complete OCP setting Setting method 2 Press buttons or to move the cursor left or right Rotate the rotary knob left or right to increase or decrease ...

Страница 12: ...is shown on the LCD Set the maximum value of Step to be the maximum value of the voltage range Setting method 1 Press numeric buttons 0 9 Decimal Point Enter to set step voltage Setting method 2 Press buttons or to move the cursor left or right Rotate the rotary knob left or right to increase or decrease the digit on cursor For example Set the step voltage to 10 000V Press 1 0 0 0 0 Enter 3 8 2 Cu...

Страница 13: ...otary knob to turn on or off the beeper 3 8 5 Hotkey Setting Press key Menu until Utility HotKey is shown on the LCD Press or rotary knob to turn on or off the hotkey function After the hotkey function is set ON the numeric button 0 to 9 means the setting data of index number 0 to 9 in memory bank So the setting data of index number 0 to 9 can be recalled by pressing the corresponding number 3 8 6...

Страница 14: ...s of 5 Press 5 Enter Note When a setting is recalled the output automatically turns off 3 8 9 Software Version Press Menu button until Utility Version is shown on the LCD The instrument software version is displayed at the same time 3 8 10 Remote Sensing Setting When the load is consuming large current there will be voltage drop on the connecting cable between terminals of power supply and the loa...

Страница 15: ...uttons or to move the cursor left or right Rotate the rotary knob left or right to increase or decrease the digit on cursor For example Set the start memory address to 0 Press 0 Enter 3 9 2 End Memory Address Setting Press Menu button until Auto End is shown on the LCD Setting method 1 Press numeric buttons 0 9 Enter to set end memory address Setting method 2 Press buttons or to move the cursor le...

Страница 16: ...eft time of running settings on the present memory address LeftCycle represents left executed cycles No means the memory address Press On Off mode to start output 3 10 Output On Off The Output On Off button on front panel is used to turn on or off the output 3 11 Panel Lock The Lock button on front panel is used to lock the front panel from misinput Press Lock button then the button backlight ligh...

Страница 17: ... indicator is on it needs to increase its current limit value to ensure that the output operation is under constant voltage mode 3 14 2 Constant Current Operation 1 Connect load to output terminal For the safety turn off the output before connecting the load to output terminals of and 2 Set the voltage limit value Press V set until Voltage is shown on the LCD the panel operation is set to voltage ...

Страница 18: ...13 green The instrument operates in Constant Voltage mode The instrument automatically switches between Constant Current mode and Constant Voltage mode according to load condition ...

Страница 19: ...g items Check whether the connection cable is broken off or not Check whether the connection cable is crossover cable Check whether the pin connection among interface cable power cord and PC is correct or not Check whether the interface cable is properly connected or not Check whether the communication parameters setup is compliant to COM port setting or not Check whether the end character is line...

Страница 20: ...ver and overheating of the plug and cord stopper Check the terminal screws and binding posts for loosening 5 2 Fuse Replacement Step 1 Take off the power cord and remove the fuse socket using a minus driver 2 Replace the fuse in the holder Fuse rating 220V For models 30V 20A and 60V 10A T4AL 250V For models 15V 60A 30V 30A and 60V 15A T8AL 250V 110V For models 30V 20A and 60V 10A T8AL 250V ...

Страница 21: ...e co efficient 300ppm Constant Current Operation CC Line regulation 0 2 3mA Load regulation 0 2 5mA Ripple Noise 10mArms Display Voltmeter 5 digits display Ammeter 5 digits display Setting resolution 1mV 1mA Reading resolution 1mV 1mA Setting accuracy Voltage 0 03 of reading 10mV 25 5 Current 0 3 of reading 10mA 25 5 Reading accuracy Voltage 0 02 of reading 5mV 25 5 Current 0 05 of reading 10mA 25...

Страница 22: ...17 Weight 5 5kg 4 5kg ...

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