Keithley 2400 Digital Multimeter

Main features:

• Integrating the functions of 5 instruments (IV source, IVR measurement)

• 6 modes: 20W~100W DC, 1000W pulse, 1100V~1 μ V, 10A~10pA

• Source and trap (4 quadrants) operation

• 0.012% basic measurement accuracy (6-and-a-half bit resolution)

• 2-wire, 4-wire, and 6-wire remote voltage sources and measurement sensing

• 1700 readings per second (4 and a half bit resolution), via GPIB

• Using/disabling comparator for quick sorting/sorting

• Provide high-speed sensing line contact inspection function

• Programmable DIO port for automation/processing programs/probe control

• Standard SCPI GPIB, RS232, and Jishili trigger link interfaces

• Jishili LabTracer 2.0 I-V Curve Tracking Application Software (Download)

Typical Applications

Equipment:

• Discrete semiconductor devices

• passive component

• Transient suppression device

• IC、RFIC、MMIC

• Laser diode, laser diode module LED、 Photodetector

• Circuit protection devices: TVS, MOV, fuses, etc

• airbag

• Connectors, switches, relays

Testing:

• electric leakage

• Low voltage/resistance

• LIV

• IDDQ

• I-V characteristic analysis

• Isolation and printed line resistance

• temperature coefficient

• Forward voltage, reverse breakdown, leakage current

• DC parameter testing

• DC power supply

• It's shrimp

• Example of insulation withstand voltage test sequence

The advantages of compact integrated instruments

By connecting the source and measurement circuit in a single device, these instruments can provide a variety of systems that are superior to those constructed with individual sources and measurement instruments. For example, they greatly shorten the time required for testing station development, establishment, and maintenance, while reducing the overall cost of purchasing the system. By eliminating the complex synchronization and connection issues associated with using multiple instruments, they simplify the testing process itself. Moreover, the compact half rack size saves valuable "space" for testing racks or test benches.

Integrating 5 instrument functions (IV source, IVR measurement)

The precise coupling characteristics of source measuring instruments have many advantages over discrete instruments. For example, it has shorter testing time, reduces GPIB traffic, and simplifies remote programming interfaces. It also protects the tested equipment from damage in occasional overload, thermal runaway, and other situations. Both the current source and voltage source can be set to read back to ensure the integrity of the device measurement. If the read back reaches the limit of programmable tolerance, the source is clamped at this limit, providing error protection.

I-V characteristic analysis

All digital source tables provide 4-quadrant operation. Working in the first and third stages, serving as a power source to output power to the load. Work in the second and fourth pixels as a trap (load) to absorb energy. Voltage, current, and resistance can be measured during source or trap operation.

Automation to improve speed

Jishili digital source meters have improved the efficiency of production testing. It can measure while providing voltage or current sources without changing connections, making it suitable for reliable operation in uninterrupted production environments. In order to meet the throughput requirements for production applications, digital source meters have many built-in functions that enable them to run complex test sequences without the need for slower computer control or GPIB communication.

Standard scanning and customized scanning

The scanning scheme uses automated hooks to greatly accelerate testing. The three basic scanning waveforms can be set to single event or continuous operation, making them very suitable for I/V, I/R, V/L, and V/R characteristic analysis.

• -Linear staircase scanning: using equal linear steps from the starting level to the ending level

• -Logarithmic staircase scanning: Scanning in proportion to the specified number of steps per ten units

• -Customized scanning: supports setting up dedicated scanning by specifying the number of measurement points and the output level of each point

• -Up to 1700 readings per second (4 and a half bit resolution), to GPIB bus

• -5000 readings can be stored in non-volatile buffer memory

Built in test sequencer (source memory list)

The source storage list provides faster and more convenient testing, allowing you to set up and execute up to 100 different tests without PC intervention.

• -Store up to 100 instrument configurations, each containing source settings, measurement settings, pass/fail criteria, and more.

• -Pass/fail limit test speed up to 500 μ s/test point

• -The onboard comparator eliminates the delay that occurs when sending data to the computer for analysis

• -Built in, user-defined mathematical functions are used to calculate and derive parameters

Digital I/O interface

The digital I/O interface can connect digital source tables to many popular component processing programs, including Aetrium, Aeco, and Robotronics. Other functions of this interface include:

• Compact system integration for applications such as sorting and sorting

• Built in component processing program interface

• Test start and test end signals

• 5V, 300mA power supply

• Optional extender accessory (2499-DIGIO type) adds 16 digital I/O lines

Trigger link interface

All digital source tables include Jishili's proprietary trigger link interface, which can establish high-speed and seamless communication with many Jishili and other instruments. For example, using trigger link interfaces to connect digital source meters and 7000 series switch systems to achieve a complete multi-point testing solution. During high-speed testing sequences independent of computers and GPIB, the 7000 series switch system can be controlled by a digital source meter by triggering the link.

Optional contact inspection function

Before the automatic testing sequence begins, the contact check function can quickly and easily verify whether the connection is good. This eliminates measurement errors and inaccurate product defects caused by contact fatigue, damage, contamination, looseness or connection interruption, relay failure, etc. Some of the performance features of this feature are as follows:

• 350 μ s verification and notification processing time

• The output of the digital source meter automatically shuts down after an error and is reactivated after confirming good contact, thereby protecting the tested device from damage and protecting the controller from potential security threats.

• 3 pass/fail thresholds: 2 Ω, 15 Ω, and 50 Ω

• During the working process, no energy passes through the tested device

• Enable from the front panel or remotely via GPIB

• 3 fault notification methods

6-wire Ohmic circuit. Due to the high current protection, the voltage at both ends of R2 is 0V, so all test currents pass through R1.

Some 6-wire resistance measurement methods

The digital source meter can perform standard 4-wire, split Kelvin, and 6-wire, protected resistance measurements and can be configured as a constant current or constant voltage method. 6-line measurement method:

• In addition to 4-wire sensing and source testing lines, protective and shielded sensing lines are also used.

• Locking the parallel current path, when measuring the isolation of the tested component in a resistor bank or hybrid circuit

• Allow users to easily configure and plot data using 2400 series source tables, enabling easy analysis of the characteristics of two, three, and four terminal devices

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• Pressure accuracy (local or remote sensing)

• model	range	Set resolution	power supply 1 Accuracy (1 year) 23 ° C ± 5 ° C ± (% rdg.+voltage)	Default measurement resolution	measurement2, 3, 4Accuracy (1 year) 23 ° C ± 5 ° C ± (% rdg.+voltage)	Output conversion rate (± 30%)	Source/trap limit
  2400, 2401	200.000 mV	5 µV	0.02% + 600 µV	1 µV	0.012% + 300 µV		±21 V @ ±1.05 A ±210 V @ ±105 mA*
  	2.00000 V	50 µV	0.02% + 600 µV	10 µV	0.012% + 300 µV
  	20.0000 V	500 µV	0.02% + 2.4 mV	100 µV	0.015% + 1.5 mV	0.08 V/µs
  	200.000 V*	5 mV	0.02% + 24 mV	1 mV	0.015% + 10 mV	0.5 V/µs
  2410	200.000 mV	5 µV	0.02% + 600 µV	1 µV	0.012% + 300 µV		±21 V @ ±1.05 A ±1100 V @ ±21 mA
  	2.00000 V	50 µV	0.02% + 600 µV	10 µV	0.012% + 300 µV
  	20.0000 V	500 µV	0.02% + 2.4 mV	100 µV	0.015% + 1 mV	0.15 V/µs
  	1000.00 V	50 mV	0.02% + 100 mV	10 mV	0.015% + 50 mV	0.5 V/µs
  2420	200.000 mV	5 µV	0.02% + 600 µV	1 µV	0.012% + 300 µV		±21 V @ ±3.15 A ±63 V @ ±1.05 A
  	2.00000 V	50 µV	0.02% + 600 µV	10 µV	0.012% + 300 µV
  	20.0000 V	500 µV	0.02% + 2.4 mV	100 µV	0.015% + 1 mV	0.08 V/µs
  	60.0000 V	1.5 mV	0.02% + 7.2 mV	1 mV	0.015% + 3 mV	0.14 V/µs
  2440	200.000 mV	5 µV	0.02% + 600 µV	1 µV	0.012% + 300 µV		±10.5 V @ ±5.25 A ±42 V @ ±1.05 A
  	2.00000 V	50 µV	0.02% + 600 µV	10 µV	0.012% + 300 µV
  	10.0000 V	500 µV	0.02% + 1.2 mV	100 µV	0.015% + 750 µV	0.08 V/µs
  	40.0000 V	5 mV	0.02% + 4.8 mV	1 mV	0.015% + 3 mV	0.25 V/µs
  *Not available on 2401.

• NOTES

• Temperature coefficient (0 ° C~18 ° C&28 ° C~50 ° C): ± (0.15 x specified accuracy)/° C.

• Voltage regulation rate: Line regulation rate: 0.01% of the range. Load adjustment rate: 0.01% of the range+100 μ V.

• Overvoltage protection: User selectable value, 5% allowable error. Factory default=none.

• Current limit/clamp: The bipolar current limit (clamp) is set to a value. 0.1% of the range (minimum value).

• Overshoot: Typical value<0.1% (full-scale step, resistive load, 10mA range).

• Additional explanation of source indicators (applicable to all models)

• Instantaneous response time: When the load undergoes a step change, the time for the output signal to recover to the specified value is 30 μ s (required).
  Command processing time: The longest time required for the output to start changing after receiving the SOURce: VOLTage | CURRent command. Automatic range on: 10ms. Automatic range off: 7ms.
  Output stabilization time: The time required to reach the final value of 0.1% after command processing and output conversion. 100 μ s (typical value). Resistive load. Range from 10 μ A to 100mA.
  DC floating ground voltage: The output terminal can float up from the chassis ground level to ± 250VDC (± 40VDC for 2440 type).
  Remote sensing: The voltage drop of each load line reaches 1V.
  Embedding accuracy: Increase the range by 0.3% and the reading by ± 0.02% on the basic indicators.
  Over temperature protection: If internal temperature overload is detected, the component will be put into standby mode.
  Range change overshoot: overshoot to full resistive 100k Ω load, 10Hz~1MHz bandwidth, adjacent
  Range: 100mV (typical value), except for 20V/200V (20V/60V for 2420), 20V/100V for 2425 and 2430, range boundary and 2440.
  Minimum embedding value: 0.1% of the range.

• Additional pulse mode source indicators (only applicable to 2430 and 2430-C)

• Maximum duty cycle: 8%, hardware limitation, only 10A range. All other ranges are 100%.
  Maximum pulse width: 5ms from 90% rising edge to 90% falling edge, 2.5ms 10A range.
  Minimum pulse width: 150 μ s.
  Minimum pulse resolution: 50 μ s (typical value), 70 μ s (maximum value) limited by system jitter.
  Source accuracy: determined by the stability time and source range indicators.
  Output stabilization time 0.1%:
  800 μ s (typical value), current source=10A to 10 Ω, limited by voltage conversion rate.
  500 μ s (typical value), current source=10A to 1 Ω, limited by voltage conversion rate.
  Output conversion rate:
  Voltage (10 Ω load): 0.25V/μ s ± 30% within the 100V range. 0.08V/μ s ± 30% in 20V range and 10A range.
  Current (0 Ω load): 0.25A/s ± 30% in the 100V range. 0.08A/μ s ± 30% in 20V range and 10A range.

• Annotation:

• Only 2400 and 2410: The indicator is effective for continuous output currents below 105mA. For continuous operation exceeding 105mA
  In 1 minute, the accuracy decreases by 10%/35mA (higher than 105mA).
  2. Speed=Normal (1PLC). For a 0.1PLC, increase the range compensation index by 0.005%, except for the 200mV, 1A, and 10A ranges, which increase by 0.05%. For a 0.01PLC, increasing the range compensation index by 0.05%, except for a 0.5% increase in the range of 200mV, 1A, and 10A.
  When correctly zeroed, the accuracy is applicable to 2-wire or 4-wire modes.
  4. In pulse mode, limited to 0.1 PLC measurement.

• Current accuracy (local or remote sensing)

• model	range	Set resolution	power supply1, 3Accuracy (1 year) 23 ° C ± 5 ° C ± (% rdg.+voltage)	Default measurement resolution	measurement5, 6, 7Accuracy (1 year) 23 ° C ± 5 ° C ± (% rdg.+voltage)	Source/trap limit
  2400, 2401	1.00000 µA	50 pA	0.035% + 600 pA	10 pA	0.029% + 300 pA	±1.05A @ ±21 V ±105 mA @ ±210 V8
  	10.0000 µA	500 pA	0.033% + 2 nA	100 pA	0.027% + 700 pA
  	100.000 µA	5 nA	0.031% + 20 nA	1 nA	0.025% + 6 nA
  	1.00000 mA	50 nA	0.034% + 200 nA	10 nA	0.027% + 60 nA
  	10.0000 mA	500 nA	0.045% + 2 µA	100 nA	0.035% + 600 nA
  	100.000 mA	5 µA	0.066% + 20 µA	1 µA	0.055% + 6 µA
  	1.00000 A2	50 µA	0.27 % + 900 µA	10 µA	0.22 % + 570 µA
  2410	1.00000 µA	50 pA	0.035% + 600 pA	10 pA	0.029% + 300 pA	±1.05A @ ±21 V ±21 mA @ ±1100 V
  	10.0000 µA	500 pA	0.033% + 2 nA	100 pA	0.027% + 700 pA
  	100.000 µA	5 nA	0.031% + 20 nA	1 nA	0.025% + 6 nA
  	1.00000 mA	50 nA	0.034% + 200 nA	10 nA	0.027% + 60 nA
  	20.0000 mA	500 nA	0.045% + 4 µA	100 nA	0.035% + 1.2 µA
  	100.000 mA	5 µA	0.066% + 20 µA	1 µA	0.055% + 6 µA
  	1.00000 A2	50 µA	0.27 % + 900 µA	10 µA	0.22 % + 570 µA
  2420	10.0000 µA	500 pA	0.033% + 2 nA	100 pA	0.027% + 700 pA	±3.15A @ ±21 V ±1.05 A @ ±63 V
  	100.000 µA	5 nA	0.031% + 20 nA	1 nA	0.025% + 6 nA
  	1.00000 mA	50 nA	0.034% + 200 nA	10 nA	0.027% + 60 nA
  	10.0000 mA	500 nA	0.045% + 2 µA	100 nA	0.035% + 600 nA
  	100.000 mA	5 µA	0.066% + 20 µA	1 µA	0.055% + 6 µA
  	1.00000 A2	50 µA	0.067% + 900 µA	10 µA	0.066% + 570 µA
  	3.00000 A2	50 µA	0.059% + 2.7 mA	10 µA	0.052% + 1.71 mA
  2440	10.0000 µA	500 pA	0.033% + 2 nA	100 pA	0.027% + 700 pA	±5.25A @ ±10.5 V ±1.05 A @ ±42 V
  	100.000 µA	5 nA	0.031% + 20 nA	1 nA	0.025% + 6 nA
  	1.00000 mA	50 nA	0.034% + 200 nA	10 nA	0.027% + 60 nA
  	10.0000 mA	500 nA	0.045% + 2 µA	100 nA	0.035% + 600 nA
  	100.000 mA	5 µA	0.066% + 20 µA	1 µA	0.055% + 6 µA
  	1.00000 A	50 µA	0.067% + 900 µA	10 µA	0.060% + 570 µA
  	5.00000 A	50 µA	0.10 % + 5.4 mA	10 µA	0.10 % + 3.42 mA

• NOTES

• Temperature coefficient (0 ° C~18 ° C&28 ° C~50 ° C): ± (0.15 x specified accuracy)/° C.

• Current regulation rate: Line regulation rate: 0.01% of the range. Load adjustment rate: 0.01% of the range (except for 0.05% of the 2440 5A range)+100pA.

• Voltage limit/embedding: The bipolar voltage limit (embedding) is set to a value. 0.1% of the range (minimum value).

• Overshoot: Typical value<0.1% (1mA step size, RL=10k Ω, 20V range, suitable for 2400, 2410, 2420, 2425, 2430), (10V range, for 2440).

• Annotation:

• Only 2400 and 2410: The indicator is effective for continuous output currents below 105mA. For continuous operation above 105mA for more than 1 minute, the accuracy decreases by 10%/35mA (above 105mA).
  2. Full operation (1A) without considering load up to 30 ° C (50 ° C for 2420 and 2440). If the ambient temperature is above 30 ° C (50 ° C for 2420 and 2440), reduce the load by 35mA/° C and distribute a 35mA/Ω load. 4-wire mode. For current traps operating in the 1A, 3A, or 5A range, the maximum continuous power is limited to approximately 1/2 of the rated power or lower, depending on the current, up to an ambient temperature of 30 ° C. Refer to the power formula in the user manual to calculate the allowable duty cycle under specific conditions.
  For trap mode, with a range of 1 μ A~100mA, the accuracy is: 2400: ± (0.15%+offset * 4), 2410, 2420, 2425, 2430, 2440: ± (0.5%+offset * 3).
  For the 1A range, the accuracy is: 2400: ± (1.5%+offset * 8), 2410, 2420, 2425, 2430, 2440: ± (1.5%+offset * 3)
  The range of 4.10A can only be achieved in pulse mode. Limit to the maximum pulse width of 2.5ms. Maximum duty cycle of 10%.
  5. Speed=Normal (1PLC). For a 0.1PLC, increasing the range compensation index by 0.005%, except for a 0.05% increase in the range of 200mV, 1A, and 10A. For a 0.01PLC, increasing the range compensation index by 0.05%, except for a 0.5% increase in the range of 200mV, 1A, and 10A.
  When correctly zeroed, the accuracy is applicable to 2-wire or 4-wire modes.
  7. In pulse mode, limited to 0.1 PLC measurement.
  Only 2400 and 2400-C are available.

• Accuracy of resistance measurement (local or remote sensing)1, 2, 5

• range	Default Resolution	Default test current 2400, 2401, 2410	Default test current 2420, 2440	Standard accuracy (23 ° C ± 5 ° C) for 1 year, ± (% rdg.+current)			Enhanced accuracy (23 ° C ± 5 ° C)41 year, ± (% rdg.+resistance)
  				2400, 2401	2410	2420, 2440	2400, 2401
  <0.20000 W3	–	–	–	Source IACC + Meas. VACC	Source IACC + Meas. VACC	Source IACC + Meas. VACC	Source IACC + Meas. VACC
  2.00000 W3	10 µW	–	1 A	Source IACC + Meas. VACC	Source IACC + Meas. VACC	0.17% + 0.0003 W	Source IACC + Meas. VACC
  20.0000 W	100 µW	100 mA	100 mA	0.10% + 0.003 W	0.11% + 0.006 W	0.10% + 0.003 W	0.07% + 0.001 W
  200.000 W	1 mW	10 mA	10 mA	0.08% + 0.03 W	0.09% + 0.1 W	0.08% + 0.03 W	0.05% + 0.01 W
  2.00000 kW	10 mW	1 mA	1 mA	0.07% + 0.3 W	0.08% + 0.6 W	0.07% + 0.3 W	0.05% + 0.1 W
  20.0000 kW	100 mW	100 µA	100 µA	0.06% + 3 W	0.07% + 6 W	0.06% + 3 W	0.04% + 1 W
  200.000 kW	1 W	10 µA	10 µA	0.07% + 30 W	0.07% + 60 W	0.07% + 30 W	0.05% + 10 W
  2.00000 MW6	10 W	1 µA	1 µA	0.11% + 300 W	0.12% + 600 W	0.11% + 300 W	0.05% + 100 W
  20.0000 MW7	100 W	1 µA	1 µA	0.11% + 1 kW	0.12% + 2.4 kW	0.11% + 1 kW	0.05% + 500 W
  200.000 MW3	1 kW	100 nA	–	0.66% + 10 kW	0.66% + 24 kW	Source IACC + Meas. VACC	0.35% + 5 kW
  >200.000 MW3	–	–	–	Source IACC + Meas. VACC	Source IACC + Meas. VACC	Source IACC + Meas. VACC	Source IACC + Meas. VACC

• Temperature coefficient (0 ° C~18 ° C&28 ° C~50 ° C): ± (0.15 x specified accuracy)/° C.
  Current source mode, manual resistance: total uncertainty=current source accuracy+voltage measurement accuracy (4-wire remote sensing).
  Voltage source mode, manual resistance: total uncertainty=voltage source accuracy+current measurement accuracy (4-wire remote sensing).
  6-wire resistance mode: supports the use of active resistance protection and protection sensing. Protective output
  Maximum current: 50mA (excluding 1A range). Accuracy depends on the load. Please refer to No. 2033 for the calculation formula.
  Protection output impedance:<0.1 Ω, resistance mode.

• annotation

• 1. Speed=Normal (1 PLC). For a 0.1 PLC, increasing the range compensation index by 0.005%, except for a 0.05% increase in the range of 200mV, 1A, and 10A. For a 0.01 PLC, increasing the range compensation index by 0.05%, except for a 0.5% increase in the range of 200mV, 1A, and 10A.

• When correctly zeroed, the accuracy is applicable to 2-wire or 4-wire modes.

• 3. Only manual resistors - except for 2420, 2425, 2430, 2440 for 2 Ω range and 2410 or 2400 for 200M Ω range.

• 4. Activate source read back and enable offset compensation. And 2410, 2420, 2425, 2430, and 2440 also provide similar accuracy enhancements.

• 5. In pulse mode, limited to 0.1 PLC measurement.

• 6. Except for 2440; The default test current is 5 μ A.

• 7. Except for 2440; The default test current is 0.5 μ A.

• system speed

• measurement 1

• Maximum range change rate: 75/s

• Maximum automatic range measurement time: 40ms (fixed source).

• Scanning working mode 3 reading speed (reading/second) @ 60Hz (50Hz):

• speed	NPLC/Trigger Source	measurement				Source - Measurement				Source - Measurement5Through failure testing4, 5				Source - Memory4
  		To memory		To GPIB		To memory		To GPIB		To memory		To GPIB		To memory		To GPIB
  Fast	0.01 / internal	2081	(2030)	1754		1551	(1515)	1369		902	(900)	981		165	(162)	165
  IEEE-488.1 Mode	0.01 / external	1239	(1200)	1254		1018	(990)	1035		830	(830)	886		163	(160)	163
  Fast	0.01 / internal	2081	(2030)	1198	(1210)	1551	(1515)	1000	(900)	902	(900)	809	(840)	165	(162)	164	(162)
  IEEE-488.2 Mode	0.01 / external	1239	(1200)	1079	(1050)	1018	(990)	916	(835)	830	(830)	756	(780)	163	(160)	162	(160)
  Medium	0.10 / internal	510	(433)	509	(433)	470	(405)	470	(410)	389	(343)	388	(343)	133	(126)	132	(126)
  IEEE-488.2 Mode	0.10 / external	438	(380)	438	(380)	409	(360)	409	(365)	374	(333)	374	(333)	131	(125)	131	(125)
  standard	1.00 / internal	59	(49)	59	(49)	58	(48)	58	(48)	56	(47)	56	(47)	44	(38)	44	(38)
  IEEE-488.2 Mode	1.00 / external	57	(48)	57	(48)	57	(48)	57	(47)	56	(47)	56	(47)	44	(38)	44	(38)

• Reading speed in single reading mode (reading/second) @ 60Hz (50Hz):

• speed	NPLC/Trigger Source	Measure to GPIB		Source - Measurement5 To GPIB		Source - Measurement5 Through failure testing4, 5To GPIB
  Fast (488.1)	0.01 / internal	537		140		135
  Fast (488.2)	0.01 / internal	256	(256)	79	(83)	79	(83)
  Medium (488.2)	0.10 / internal	167	(166)	72	(70)	69	(70)
  Standard (488.2)	1.00 / internal	49	(42)	34	(31)	35	(30)

• Component @ 60Hz (50Hz)4, 6

• speed	NPLC/Trigger Source	Measure to GPIB		Source passed failure test		Source measurement passed failure test5, 7To GPIB
  Fast	0.01 / external	1.04 ms	(1.08 ms)	0.5 ms	(0.5 ms)	4.82 ms	(5.3 ms)
  Medium	0.10 / external	2.55 ms	(2.9 ms)	0.5 ms	(0.5 ms)	6.27 ms	(7.1 ms)
  standard	1.00 / external	17.53 ms	(20.9 ms)	0.5 ms	(0.5 ms)	21.31 ms	(25.0 ms)

• NOTES

• The reading rate can be used for voltage or current measurement. Turn off self stabilizing zero, turn off automatic range, turn off filter, turn off display, trigger delay=0, and use binary reading format.
  2 pure resistive wires. The range of 1 μ A and 10 μ A is less than 65ms.
  The characteristic of scanning 3000 points is to output within a fixed range.
  4. Conduct pass/fail testing using upper and mathematical lower limits.
  5 includes the time to reset the source to a new level before taking measurements.
  The time from the falling edge of the START OF TEST signal to the falling edge of the END OF TEST signal.
  7 does not include commands: SOURce: VOLTage | CURRent: TRIGgeredThe processing time.

• Comprehensive Description

• Noise suppression:

• 	NPLC	NMRR	CMRR
  Fast	0.01	—	80 dB
  Medium	0.1	—	80 dB
  Slow	1	60 dB	100 dB1
  1 Except for two current ranges of 90dB.

• Load impedance: Stabilize to 20000pF (typical value).
  Common mode voltage: 250V DC (2440 is 40VDC).
  Common mode isolation:>109Ω，<1000pF。
  Over range: 105% of the range, source and measurement.
  Maximum voltage drop between input/output and measurement terminal: 5V.
  Maximum resistance of sensing line: 1M Ω, rated accuracy.
  Sensing input impedance:>1010Oh.
  Protection bias voltage:<150 μ V, typical value (300 μ V for 2430 and 2440).
  Source output mode:
  Pulse (only 2430 type)
  Fixed DC level
  Memory List (Mixed Function)
  Ladder scanning (linear and logarithmic)
  Memory buffer: 5000 readings/second @ 5-bit resolution (2 2500 point buffers). Include the selected measurement values and timestamps. Lithium battery backup (battery life exceeding 3 years)
  Source storage list: 100 points (maximum).
  Programmable: IEEE-488 (SCPI-1995.0), RS-232, 5 user-defined power on states plus factory default settings and * RST.
  Digital interface:
  Interlock: Low level input is valid:
  Process program interface: Test start, test end, 3 types of bits+ 5V@300mA Power Supply.
  Digital I/O: 1 trigger input, 4 TTL/relay drive output（ 33V@500mA Diode clamp).
  Power supply: 100V-240Vrms, 50Hz-60Hz (automatically detected when powered on).
  2400：190VA。 2410：210VA。
  2420：220VA。 2425，2430：250VA。 2440：240VA。
  Heat dissipation: (2410, 2420, 2425, 2430, 2440): forced air, variable speed.
  EMC: Compliant with EU Directive 89/336/EEC, EN 61326-1.
  Safety: Compliant with EU Directive 73/23/EEC, EN61010-1.
  Vibration: MIL-PRF-28800F Class 3 random vibration.
  Preheating time: 1 hour to achieve rated accuracy.
  Specification: 89mm high x 213mm wide x 370mm deep (3 1/2 in x 8 3/8 in x 14 9/16 in). Benchmark configuration (with handle&feet): 104mm high x 238mm wide x 370mm deep (4 1/8 in x 9 3/8 in x 14 9/16 in).
  Weight: 3.21kg (7.08 pounds) (2425, 2430, 2440 weight: 4.1kg, 9.0 pounds).
  Working environment: Working conditions range from 0 ° C to 50 ° C, with a relative humidity of 70% to 35 ° C. Reduce R.H./° C by 3%, with a temperature range of 35 ° C to 50 ° C.
  Storage conditions: -25 ° C~65 ° C.