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14

Front panel operation

NOTE

No Pulses Detected message

If no pulses are detected, current will not be measured (i.e., -----A), and the “NO 
PULSE” message will be displayed. The “NO PULSE” message is displayed with 
dashes or the last valid pulse reading. Dashes are shown if the pulse-current mea-
surement settings are not appropriate for detecting pulses. The last valid pulse is 
shown if the pulse disappears while taking readings and no change in pulse settings 
was made. 

Pulses are not detected with the output OFF. With the output ON, pulses will not be 
detected if the trigger level is too low or too high. Adjust the trigger level as neces-
sary and toggle back to the display mode until pulse measurements are displayed. 

NOTE

If possible, the user should always use an oscilloscope to determine the timing and 
transient characteristics of a DUT. The waveform information is very useful in set-
ting up the Model 2306, reducing setup time, and achieving maximum performance 
and productivity. The voltage and current characteristics of the DUT can be deter-
mined with a two-channel oscilloscope, a 0.1 ohm resistor used as a current sense 
resistor, and a voltage probe at the DUT as shown in Figure 7. 

Figure 7

Circuit — determining the dynamic voltage and current characteristics of a DUT

NOTE

Figure 7 contains a simple circuit for determining the dynamic voltage and current 
characteristics of the DUT using a 2-channel oscilloscope, a 0.1 ohm resistor used 
as a current sense resistor, and a voltage probe at the DUT.

External Test Circuit

Quick Disconnect

Connector

DVM +

DVM -

Source -

Source -

Sense -

Sense +


Twisted pair

Model 2306

source input/output

DVM input

Oscilloscope

0.1 

Ω

 Current

sense resistor

CHANNEL 1

CHANNEL 2

DUT

+

-

Summary of Contents for Keithley 2302

Page 1: ... P2306 903 01D 2306 903 01D tek com keithley Quick Results Guide 2306 903 01 Rev D May 2019 Model 2302 2302 PJ 2306 2306 PJ 2306 VS Battery Charger Simulator ...

Page 2: ...Model 2302 2302 PJ 2306 2306 PJ 2306 VS Battery Charger Simulator Quick Results Guide 2019 Keithley Instruments LLC All rights reserved Cleveland Ohio U S A May 2019 Document Number 2306 903 01 Rev D ...

Page 3: ......

Page 4: ...le setting the line voltage or replacing consumable materials Maintenance procedures are described in the user documentation The procedures explicitly state if the operator may perform them Otherwise they should be performed only by service personnel Service personnel are trained to work on live circuits perform safe installations and repair products Only properly trained service personnel may per...

Page 5: ...rs before connecting or disconnecting cables or jumpers installing or removing switching cards or making internal changes such as installing or removing jumpers Do not touch any object that could provide a current path to the common side of the circuit under test or power line earth ground Always make measurements with dry hands while standing on a dry insulated surface capable of withstanding the...

Page 6: ...luding the power transformer test leads and input jacks must be purchased from Keithley Instruments Standard fuses with applicable national safety approvals may be used if the rating and type are the same The detachable mains power cord provided with the instrument may only be replaced with a similarly rated power cord Other components that are not safety related may be purchased from other suppli...

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Page 8: ...4 wire remote sense connection of the DUT to the output 3 2 wire local sense connection of the DUT to the output 4 Pulsed waveform 10 Eliminating the effect of a current transient on a pulse current measurement 11 Circuit determining the dynamic voltage and current characteristics of a DUT 14 Pulsed waveform 17 Battery schematic 21 Actual battery pack terminal voltage during GSM phone simulation 2...

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Page 10: ...tery and charger channel features contained in this manual apply for the Model 2306 and 2306 PJ only battery channel features contained in this manual apply for the Model 2302 and 2302 PJ Refer to Appendix F of Instruction Manual 2306 901 01 for specific Model 2302 and 2302 PJ information Information contained in this guide applies to all power supply channels unless otherwise noted In this manual...

Page 11: ...A Available trigger ranges for the 500mA current range Model 2306 PJ and 2302 PJ 10mA 100mA and 500mA 3 Variable output impedance on channel 1 0Ω to 1 00Ω in 0 01Ω steps Channel 2 has fixed output impedance Proper connection of the supply to the DUT WARNING When installing a unit into a test system make sure the external power sources do not apply voltage to the power supply in excess of its maxim...

Page 12: ...LATION FROM EARTH 22 VOLTS MAX RELAY CONTROL 24VDC MAX _ _ _ _ SOURCE SENSE DVM IN SOURCE OUTPUT 2 DVM IN 30 VDC MAX CAT I External Test Circuit Quick Disconnect Connector Model 2306 source input output DVM input DUT DVM DVM Source Source Sense Sense Source Source Twisted pair Figure 2 shows a rear panel view of the Model 2306 detailing the connector sockets for the battery channel OUTPUT 1 and th...

Page 13: ...e the UP and DOWN keys to scroll through the primary menu items Changing channels Model 2306 only When the main menu is displayed use the keys to change the active channel each press of the keys will toggle between chan nel 1 and channel 2 NOTE If a channel number is not shown the LEFT and RIGHT key presses will be ignored Also the LEFT and RIGHT key presses will be ignored if a sub menu only exis...

Page 14: ...sub menu items Turning supply output ON OFF The OPERATE key is used to control the output of the power supply This key toggles the output between on and off While in one of the display modes output ON or OFF is displayed in the upper right corner of the display The key is active in any front panel menu or display mode In menus the on off state of operate is not displayed Actual V and I mode Measur...

Page 15: ... rate for pulse current and long inte gration measurements These measurements are covered in the paragraphs titled Pulse current mode on page 9 and Long integration mode on page 16 Average readings The average reading count 1 to 10 specifies the number of measurement conversions to average for each reading For example with a reading count of 5 each displayed reading will be the average of five mea...

Page 16: ...RR TYPE TRIP Select Trip mode for current limit SENS FUNC VOLT Select the voltage measurement function SENS NPLC 2 Set integration rate to 2 PLC SENS AVER 5 Set average reading count to 5 OUTP ON Turn on the power supply output READ Trigger 5 voltage measurement conversions and return the average of those 5 conversions The average reading is displayed on the front panel SENS FUNC CURR Select curre...

Page 17: ...layed 3 Press ENTER Command Description SOUR2 VOLT 5 Set output voltage to 5V SENS2 CURR RANG AUTO ON Enable auto range for current SOUR2 CURR 750e 3 Set current limit to 750mA SOUR2 CURR TYPE LIM Select LIM mode for current limit SENS2 FUNC VOLT Select the voltage measurement function SENS2 NPLC 4 Set integration rate to 4 PLC SENS2 AVER 4 Set average reading count to 4 OUTP2 ON Turn on the power...

Page 18: ...edge of the pulse triggers the low measurement and an integration is performed for the time specified for the low measurement An average measurement is triggered on the rising edge and covers both the high and low periods of the pulse as specified by the average measurement time setting The Model 2306 computes one measurement parameter high low or average at a time The desired measurement mode on ...

Page 19: ... load is operational the 2306 can be prompted to automatically determine the high time low time and average time in pulsed current mode according to Figure 5 These parameters may also be set manually from the front panel or over the GPIB bus Figure 5 Pulsed waveform NOTE The pulsed waveform in Figure 5 shows trigger level and the high low and average times set by the Model 2306 using the auto time...

Page 20: ...the current transient on the measurement is small the user can eliminate the effect of the transient by adding a suitable amount of trigger delay In this case a delay of 100µs is sufficient to elim inate the effect of transient approximately 70µs from the measurement Accordingly the HIGH integration time TH2 must be reduced in this case 300µs was chosen so the inte gration time does not extend int...

Page 21: ...2306 PJ and 2302 PJ On the 500mA current range the trigger level can be set for either the 500mA 100mA or the 10mA range Trigger level ranges 500mA range 0 500mA in 0 5mA steps 100mA range 0 100mA in 0 1mA steps 10mA range 0 10mA in 0 1mA steps To change the range for the trigger level setting place the blinking cursor on the A at the far right end of line two of the display and press the UP or DO...

Page 22: ...delay is always present Average readings count if necessary Channel 1 and Channel 2 The AVERAGE READINGS sub menu of the PULSE CURRENT 1 2 menu item is used to set the average readings count for pulse current measurements This count specifies the number of measurements integrations to average for each reading Range is 1 100 Pulse current display mode Pulse current measurements are displayed with t...

Page 23: ...oscilloscope to determine the timing and transient characteristics of a DUT The waveform information is very useful in set ting up the Model 2306 reducing setup time and achieving maximum performance and productivity The voltage and current characteristics of the DUT can be deter mined with a two channel oscilloscope a 0 1 ohm resistor used as a current sense resistor and a voltage probe at the DU...

Page 24: ...VER 10 Set average count to 10 SENS PCUR SYNC TLEV RANG 0 5 Select the 1A trigger level range SENS PCUR SYNC TLEV ONE 0 1 Set trigger level to 100mA for 1A trigger level range SENS PCUR TIME AUTO Set integration times automatically SENS PCUR SYNC DEL 50e 3 Set trigger delay to 50msec SENS FUNC PCUR Select pulse current function SENS PCUR MODE HIGH Configure to measure peak pulse READ Trigger 10 me...

Page 25: ...e 17 To average over several pulse peri ods the user must enter the sum of the pulse periods as the integration time The GPIB commands TIMEOUT SEARCH DETECT and FAST are available exclusively in the long integration mode to optimize measurement speed For the relevance and use of these commands regarding a particular measurement application refer to the Model 2306 Instruction Manual Section 4 Long ...

Page 26: ...306 PJ and 2302 PJ select 500mA or 5A For Models 2306 and 2302 the 5A range is automatically selected Set trigger level and range TRIGLEVELRANGE and TRIGGERLEVEL sub menus Battery Channel 1 On the 5A current range the trigger level can be set for either the 5A 1A or 100mA range Trigger level ranges 5A range 0 5A in 5mA steps 1A range 0 1A in 1mA steps 100mA range 0 100mA in 0 1 mA steps TRGLEVmARA...

Page 27: ...INTEGRATION TIME sub menu The value for LINT INT TIME for channel 1 or channel 2 can be specified in 0 850 sec to 60 sec i e 60Hz with the UP and DOWN keys Automatically setting long integration time AUTO TIME sub menu Press ENTER when LINT AUTOTIME 1 2 ACQUIRE TIMES appears on the dis play If the correct trigger level is selected in the previous step and the DUT is operating the Model 2306 will a...

Page 28: ...er selectable NOTE If you select AUTO TIME to set the integration time the pulse timeout message LONG INT TRIG NOT DETECTED will display if the output is OFF This mes sage indicates that the integration time has not been updated To update the integra tion time select AUTO TIME after the output is turned ON Programming examples long integration measurements The following command sequence will trigg...

Page 29: ...s the performance of the device This phenomenon occurs in TDMA and GSM cellular handsets where the magnitude of the ON OFF current during transmission varies by as much as a factor of 20 In the absence of any filtering capacitance between the battery and the RF power amplifier the handset will shut off if the supply voltage is below the operating threshold for periods as short as several micro sec...

Page 30: ...he pulse minimum voltage is the voltage at the battery terminals during the transmit or high current portion of the data frame The average battery voltage is the voltage across the terminals measured with a 6 digit DMM at approximately 50 readings per second The figure shows the pulse minimum voltage reaches the shutdown threshold of 5 7V before the average battery volt age The difference between ...

Page 31: ... pulse from a dynamic load simulating a GSM phone 5 00 5 50 6 00 6 50 7 00 7 50 8 00 8 50 9 00 0 0 2 0 4 0 6 0 8 0 10 0 Battery Voltage V Time hrs 6 59 7 18 8 15 5 7V Li ion Average Battery Voltage NiMH Average Battery Voltage NiCd Average Battery Voltage Li ion Battery Pulse Minimum Voltage NiMH Battery Pulse Minimum Voltage NiCd Battery Pulse Minimum Voltage 6 4 4 1 1 3 5 2 2 5 3 6 ...

Page 32: ...ent profile NOTE The simulated GSM phone current profile contained in Figure 11 shows a standby current of 0 030A a transmit current of 1 2A and the pulse minimum voltage during the transmit frame Current Voltage Pulse Minimum Voltage 0 030 amps 1 200 amps ...

Page 33: ...mpedance of a battery pack The output impedance may be set from 0 00 ohms default condition to 1 00 ohms in 0 01 ohm increments from the front panel or over the GPIB bus Figure 13 shows the output voltage and current response of channel 1 with a GSM phone for output impedance values of 0 00 0 05 and 0 10 ohms The voltage drop 70mV in c and 140mV in e is approximately equal to the dynamic load curr...

Page 34: ... 13 Effect of variable output impedance control NOTE Figure 13 contains the effect of the variable output impedance control of the Model 2306 on the current and voltage performance of a GSM handset 1 4 amps 140mV 70mV a b c d e f ...

Page 35: ...ansmit portion of the pulse with the supplied Li ion battery pack See Figure 15 for the comparative illustration using the Model 2306 Figure 14 shows the transient voltage response at the battery terminals with the handset bat tery Using Figure 14 the voltage drop during the transmit portion of the pulse of a GSM phone with the supplied Li ion battery is 0 348V Using the pulse current mode of the ...

Page 36: ...ement to within 3 with the results obtained with the battery included with the handset Figure 15 Voltage drop sample with Model 2306 and output impedance set at 0 24Ω NOTE Figure 15 shows the voltage drop during the transmit portion of the pulse of a GSM phone using the Model 2306 battery channel with output impedance set to 0 24Ω See Figure 14 for actual Li ion battery results VH VL 0 360V ...

Page 37: ...d eliminates oscillations that may occur The LOW bandwidth output mode is selectable from the front panel or over the GPIB bus of the Model 2306 Front panel operation for output bandwidth The following settings are available in main menu under OUT BANDWIDTH 1 2 Use the UP or DOWN keys to set the desired output bandwidth either HIGH or LOW GPIB commands Command Description OUTPut BANDwidth HIGH or ...

Page 38: ... names are the property of Keithley Instruments All other trademarks and trade names are the property of their respective companies Keithley Instruments Corporate Headquarters 28775 Aurora Road Cleveland Ohio 44139 440 248 0400 Fax 440 248 6168 1 800 935 5595 www tek com keithley 12 17 ...

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