KEISOKU GIKEN Load Station Series | PT. NIHON DENKEI INDONESIA Jakarta

The high-end multifunctional electronic load "Load Station Series" has a lineup of two models with rated voltages of 300W/1000W and 120V/500V respectively

A booster function is standard equipment, so if the capacity of one unit is not enough, it can be easily expanded to 10 units (10 kW for 1 kW type).
Eight front points, such as an easy-to-read 3.5-inch color LCD and large rotary knob, provide oscilloscope-like usability.

Load Station Series

Maker:

KEISOKU GIKEN

Specification

load part

Rating

	LN-300A	LN-300C
Voltage	120V	500V
current	60A	12A
Power ^*1	300W
Internal minimum resistance ^*2	18 mΩ or less	100 mΩ or less
Load range ^{2, 3}	1.08V (60A) / 0.54V (30A) / 0.22V (12A)	1.2V(12A) / 0.6V(6A) / 0.28V(2.8A)

	LN-1000A	LN-1000C
Voltage	120V	500V
current	180A	36A
Power ^*1	1000W
Internal minimum resistance ^*2	6 mΩ or less	33.3 mΩ or less
Load range ^{2, 3}	1.08V (180A) / 0.54V (90A) / 0.22V (36A)	1.2V(36A) / 0.6V(18A) / 0.28V(8.4A)

*1: Varies depending on the temperature inside the case and operating time when using this product. *2: At the rear panel load terminals. It is not the set value of CR mode. *3: The minimum operating voltage changes depending on the current value.

load mode

Equipped with 6 load modes.
There are 6 types of load modes and 4 types of operation modes, and 17 load tests are possible with these combinations.
The load mode is equipped with an automatic switching function ( VMode ) according to the specified voltage. When performing a discharge test of a secondary battery, etc., the load mode can be switched to prevent overdischarge when the output voltage reaches the set value.

Common to the Load Station series Normal mode (steady load)

Constant current (CC) mode	A constant current flows even if the load terminal voltage changes
Constant resistance (CR) mode	Flows a current proportional to the load terminal voltage
Constant voltage (CV) mode	Current is passed so that the load terminal voltage is constant.
Constant power (CP) mode	Let the current flow so that the load power is constant
External control (EXT) mode	Flows a current proportional to the voltage of the external control input terminal
Short mode	Short-circuit the load terminals (maximum current)

load mode

		load mode
		CC	CR	CVs	CP	EXT	SHORT
action mode	Normal	〇	〇	〇	〇	〇	〇
	Dynamic	〇	〇	〇	〇	―	―
	*Sequence	〇	〇	〇	〇	―	―
	Sweep	〇	〇	―	〇	―	―

*Sequence operation requires setting from a PC.

Automatic switching function (VMode)

		Starting load mode
		CC	CR	CVs	CP	EXT	SHORT
switch mode	OFF	〇	〇	〇	〇	×	×
	※CC	―	×	×	×	×	×
	CR	〇	―	〇	〇	×	×
	CVs	〇	〇	―	〇	×	×
	CP	〇	〇	〇	―	×	×

*Switching to CC mode is not possible.

Constant current (CC) mode

		LN-300A	LN-300C	LN-1000A	LN-1000C
Current setting range	H.	0A to 60A	0A to 12A	0A to 180A	0A to 36A
	M.	0A to 6A	0A to 1.2A	0A to 18A	0A to 3.6A
	L.	0A to 0.6A	0A to 0.12A	0A to 1.8A	0A to 0.36A
resolution	H.	5 mA	1mA	15mA	3mA
	M.	0.5mA	0.1mA	1.5mA	0.3mA
	L.	0.1mA	0.02mA	0.3mA	0.06mA
Setting accuracy ^*4	H.	±{0.2% of set. +25mA +Vin/50kΩ}	±{0.2% of set. +10mA +Vin/750kΩ}	±{0.2% of set. +75mA +Vin/16.67kΩ}	±{0.2% of set. +30mA +Vin/250kΩ}
	M.	±{0.2% of set. +12mA +Vin/50kΩ}	±{0.2% of set. +3mA +Vin/750kΩ}	±{0.2% of set. +36mA +Vin/16.67kΩ}	±{0.2% of set. +9mA +Vin/250kΩ}
	L.	±{0.2% of set. +6mA +Vin/50kΩ}	±{0.2% of set. +2mA +Vin/750kΩ}	±{0.2% of set. +18mA +Vin/16.67kΩ}	±{0.2% of set. +6mA +Vin/250kΩ}
Slew rate ^*5 (current range)	H.	0.2A/μs to 20A/μs	0.01A/μs to 1A/μs	0.3A/μs to 30A/μs	0.03A/μs to 3A/μs
	M.	0.02A/μs to 2A/μs	0.001A/μs to 0.1A/μs	0.03A/μs to 3A/μs	0.003A/μs to 0.3A/μs
	L.	0.005A/μs to 0.5A/μs	0.00025A/μs to 0.025A/μs	0.0075A/μs to 0.75A/μs	0.00075A/μs to 0.075A/μs
Startup current over/undershoot range ^*6	H/M/L	±{0.2% of set. ±25mA +Vin/50kΩ}	±{0.2% of set. ±10mA +Vin/750kΩ}	±{0.2% of set. ±75mA +Vin/16.67kΩ}	±{0.2% of set. ±30mA +Vin/250kΩ}

*4: At an ambient temperature of 23°C ±5°C. *5: At the rear panel load terminals. Load current response speed from 10% to 90% of the time between rise and fall. Can be set only in CC mode and EXT mode. In CV mode, it becomes the response time setting. It cannot be set in CR, CP and SHORT modes. *6: Range of over/undershoot that occurs from 90% to 100% (set current value) of the rising current.

Rising current over/undershoot range

Constant resistance (CR) mode

		LN-300A	LN-300C	LN-1000A	LN-1000C
Voltage range		20V	85V	20V	85V
Resistance setting range	Current range: H	40.000S to 0.005S (0.025Ω to 200Ω)	3.3333S to 0.0004S (0.3Ω to 2.5kΩ)	120.00S to 0.01S (0.0083Ω to 66.667Ω)	10.000S to 0.001S (0.1Ω to 833.33Ω)
Resistance setting range	Current range: M	4.000S to 0.0005S (0.25Ω to 2kΩ)	0.33333S to 0.00004S (3Ω to 25kΩ)	12.000S to 0.001S (0.0833Ω to 666.67Ω)	1.0000S to 0.0001S (1Ω to 8333.3Ω)
resolution	Current range: H	4ms	333 μs	12ms	1ms
resolution	Current range: M	400 μs	33 μs	1.2ms	0.1ms
CR mode slew rate (typ. value) ^*7	Current range: H	2.8A/µs	0.2A/µs	7.0A/μs	0.9A/µs

		LN-300A	LN-300C	LN-1000A	LN-1000C
Voltage range		120V	500V	120V	500V
Resistance setting range	Current range: H	13.333S to 0.0016S (0.075Ω to 600Ω)	1.1111S to 0.0001S (0.9Ω to 7kΩ)	40.000S to 0.005S (0.025Ω to 200Ω)	3.3333S to 0.0004S (0.3Ω to 2.3333kΩ)
Resistance setting range	Current range: M	1.3333S to 0.00016S (0.75Ω to 6kΩ)	0.11111S to 0.00001S (9Ω to 70kΩ)	4.0000S to 0.0005S (0.25Ω to 2kΩ)	0.33330S to 0.00004S (3Ω to 23.333kΩ)
resolution	Current range: H	1.33ms	111 μs	3.99ms	333 μs
resolution	Current range: M	133 μs	11 μs	399 μs	33 μs
Setting accuracy ^*8		±{0.5% of Conv.Curr.+0.2% of FS .+Vin/50kΩ}	±{0.5% of Conv.Curr.+0.2% of FS .+Vin/750kΩ}	±{0.5% of Conv.Curr.+0.2% of FS .+Vin/16.67kΩ}	±{0.5% of Conv.Curr.+0.2% of FS .+Vin/250kΩ}

*7: CR mode slew rate (dynamic mode) LN-300A: at 7.5 V / 5.63 S, LN-300C: at 25 V / 0.48 S, LN-1000A: at 15 V / 12 S, LN-1000C: at 27 V /1.33 S
*8: Conv.Curr. indicates the ideal current value of “Vin / setting resistance value”. It is valid from a voltage value of 1/10 V or more of the voltage range selected by Vin. FS . is the current full scale of current H range. At an ambient temperature of 23°C ±5°C.

Constant voltage (CV) mode

		LN-300A	LN-300C	LN-1000A	LN-1000C
Voltage setting range	H.	0V to 120V	0V to 500V	0V to 120V	0V to 500V
Voltage setting range	L.	0V to 20V	0V to 85V	0V to 20V	0V to 85V
resolution	H.	10mV	50mV	10mV	50mV
resolution	L.	2mV	10mV	2mV	10mV
Setting accuracy ^*9		±{0.1% of set. +0.1% of FS .}
Response time (typ. value) ^*10		Fast/Slow
Response time (typ. value) ^*10		Fast 45ms	Fast 280ms	Fast 550 μs	Fast 110ms
Response start time (typ. value) ^*11		2ms	7ms	20 μs	4ms

*9: At an ambient temperature of 23°C ±5°C. *10: Time to reach CV setting value (dynamic mode, voltage range: L, current range: H) LN-300A: 15.0 V → 7.5 V, LN-300C: 25.0 V → 22.5 V, LN-1000A: 15.0 V → 4.0 V, LN-1000C: 27.0 V → 19.8 V *11: Time from switching CV setting value to starting control Dynamic mode, voltage range: L, current range: H

Constant power (CP) mode

		LN-300A	LN-300C	LN-1000A	LN-1000C
Power setting range	Current range: H	0W to 300W		0W to 1000W
Power setting range	Current range: M	0W to 40W		0W to 120W
resolution	Current range: H	50mW		167mW
resolution	Current range: M	5mW		16.7 mW
Setting accuracy ^*12		±{0.6% of set.+1.4% of FS .+(Vin×Vin)/50kΩ}	±{0.6% of set.+1.4% of FS .+(Vin×Vin)/750kΩ}	±{0.6% of set.+1.4% of FS .+(Vin×Vin)/16.67 kΩ}	±{0.6% of set.+1.4% of FS .+(Vin×Vin)/250kΩ}

*12: FS is the current full scale of current H range. At an ambient temperature of 23°C ±5°C.

External control (EXT) mode

		LN-300A	LN-300C	LN-1000A	LN-1000C
Current setting range	H.	0A to 60A	0A to 12A	0A to 180A	0A to 36A
Current setting range	M.	0A to 6A	0A to 1.2A	0A to 18A	0A to 3.6A
resolution	H.	10mA	2mA	30mA	6mA
resolution	M.	1mA	0.2mA	3mA	0.6mA
Setting accuracy ^*13		±{0.2% of set. +0.5% of FS . +Vin/50 kΩ}	±{0.2% of set. +0.5% of FS . +Vin/750 kΩ}	±{0.2% of set. +0.5% of FS . +Vin/16.67 kΩ}	±{0.2% of set. +0.5% of FS . +Vin/250 kΩ}
control voltage		0V to 10V

*13: The setting accuracy of the external control mode is only when the control voltage input is 10 V. At an ambient temperature of 23°C ±5°C.

Short mode

	LN-300A	LN-300C	LN-1000A	LN-1000C
Short current (maximum)	60A	12A	180A	36A

action mode

Dynamic mode (variable load)

	Common to the Load Station series
control method	Switching operation (executed by sequentially switching between 2 types or up to 16 types of load conditions)
Available load mode	CC/CR/CV/CP mode
Setting cycle	~20ms / ~200ms / ~2s / ~20s / ~60s
Cycle resolution	1 μs / 10 μs / 100 μs / 1 ms / 10 ms
Action selection	Single (Time only), Repeat
Minimum load response time (nominal) ^*14	500 ns (in H/M/L CC mode)

*14: Minimum response time for slew rate setting. When 50% or more of the rated load current value for each H/M/L range.

About minimum load response time (nominal)

The slew rate of this product may slow down depending on the set load current value. The relationship between slew rate and load current value is called minimum load response time (nominal). Regarding the minimum load response time (nominal), the slew rate may be slower than the set value due to the restrictions and influences of the following conditions.

Terms and Restrictions

When CC mode and dynamic mode are set
50% or more of the rated load current for each H/M/L range
Load terminal voltage (Vin) or more (Refer to the maximum set slew rate for load terminal voltage in the next section.)
Reduce the effect of inductance on cabling

As shown in the figure above, when the slew rate is set at 50% or more of the rated load current of each H/M/L range, the waveform of the set slew rate is obtained. If the load current is less than 50% of the rated load current for each H/M/L range, the value will be lower than the set slew rate.

Maximum set slew rate at load terminal voltage

model	Load terminal voltage Vin (rear panel)	Maximum set slew rate
LN-300A	6V≤Vin	20A/μs
	5V≤Vin	15A/μs
	4V≤Vin	10A/μs
	3V≤Vin	5A/μs
LN-300C	3V≤Vin	1A/μs

model	Load terminal voltage Vin (rear panel)	Maximum set slew rate
LN-1000A	8V≤Vin	30A/μs
	7V≤Vin	20A/μs
	5V≤Vin	10A/μs
	3V≤Vin	5A/μs
LN-1000C	3V≤Vin	3A/μs

sweep mode

	Common to the Load Station series
Sweep R (VI characteristic test)	Measure the current and voltage while changing the load in CR mode
Sweep C (overcurrent characteristic test)	Measure current and voltage values while changing the load in CC mode
Sweep P (overpower characteristic test)	Measure power and voltage values while changing the load in CP mode

Sequence operation (remote control only)

	Common to the Load Station series
enabled mode	CC/CR/CV/CP mode
Maximum number of steps	1024
step time	1 ms to 10 min (common for each step)
Step time resolution	1 ms (1 ms to 100 ms) / 100 ms (100 ms to 10 min)
number of repetitions	1 to 65535, or ∞

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