2. Specifications#

This section only gives the specification changes relative to the Joulescope JS220 User’s Guide. All other specifications remain the same as the JS220. The JS220+ datasheet lists the complete specifications.

2.1. Current measurement specifications#

This table replaces the JS220 current measurement specifications.

Range	Accuracy	Resolution	Impedance	Guaranteed
10 A (> 2 A)¹	±0.25% ±1.5 mA	350 µA	0.01 Ω	±9.7 A
10 A (≤ 2 A)	±0.1% ±300 µA	75 µA	0.01 Ω	±2.05 A
180 mA	±0.1% ±30 µA	6.5 µA	0.11 Ω	±185 mA
18 mA	±0.1% ±3.0 µA	650 nA	1.11 Ω	±18.5 mA
1.8 mA	±0.1% ±300 nA	65 nA	11.1 Ω	±1.85 mA
180 µA	±0.1% ±30 nA	6.5 nA	111 Ω	±185 µA
18 µA	±0.1% ±3 nA²	0.65 nA	1111 Ω	±18.5 µA

Max 3 A sustained. See the recommended operating conditions for higher current durations.
±1.0 nA for ±5 °C over 24 hours with trim offset calibration.

2.2. Voltage measurement specifications#

This table replaces the JS220 voltage measurement specifications.

Range	Accuracy	Resolution	Guaranteed
15 V	±0.1% ±1 mV	500 µV	±14.5 V
2 V	±0.1% ±150 µV	75 µV	±2.2 V

2.3. Parasitic effects specifications#

This table replaces the JS220 parasitic effects specifications.

	Test condition	Min	Typical	Max	Unit
Current leakage (Voltage + to -)	25 °C, ±3.3V			200	pA
Current leakage (Voltage + to -)	25 °C, ±5V			200	pA
Current leakage (Voltage + to -)	25 °C, ±14V			300	pA
Shunt resistor voltage, max	-2 to 2 A, static		20	21	mV
Burden voltage (Current + to -)	1 A, banana jacks	0	25	35	mV
Burden voltage (Current + to -)	Shunt resistor, < ±2 A			±20	mV
Shunt switching time	Over-range, < 200 ns rise time	0	1.0	1.5	µs
Measurement gap following a current range switch				0	µs
Input bias current Voltage+ & -	25 °C		±5	±20	pA
Input bias current, Current + & -	25 °C, 18 µA current range		±60	±600	pA

Resolution is given for 10 kHz measurement bandwidth (20 ksps).

The JS220+ includes a safety banana jack front panel rather than binding posts.