Fluke 1621 Specifications

Measurement Functions	3-pole earth ground resistance, 2-pole ac resistance of a conductor, interference voltage
Intrinsic Error	Refers to the reference temperature range and is guaranteed for one year.
Measurement Rate	Two measurements per second
Battery (note 1.)	One 9 volt Alkaline LR61 battery
Battery Condition	LO-BAT is displayed if voltage drops below 6.5V
Voltages	Between Jacks H/C2 and E/C1	250 Veff maximum (effective voltage)
	Between Jacks S/P2 and E/C1	250 Veff maximum
Climatic Class	VDE/VDI 3540 RZ (conforming to KWG as per DIN 40040, 4/87)
Temperature Performance (note 2.)	Working	-10°C to +50°C (+14°F to +122°F)
	Operating	0°C to +35°C (+32°F to +95°F)
	Storage	-20°C to +60°C (+68°F to +140°F)
	Reference	+23°C ±2°C (+73°F ±4°F)
Temperature Coefficient	± 0.1% of range per degree Kelvin
Safety	IEC/EN 61010-1, 600V CAT II, pollution degree 2
Dimensions	113mm x 54mm x 216mm (4.5" x 2.1" x 8.5"), including holster
Weight	850g (1.9 lb), including standard accessories, volume approximately 600 cm³


Note 1.	If the tester is not going to be used, or is being stored for a long period, remove the battery and store separately from the tester to avoid damage from battery leakage.
Note 2.	The four temperature ranges for the tester exists to satisfy European Standards requirements; the instrument can be used over the full working temperature range by using the temperature coefficient to calculate accuracy at the ambient temperature of use.

Maximum Deviation	E₁ Influence factor	Position
	E₁ Deviation influence	0%
	E₂ Influence factor	Supply voltage
	E₂ Deviation influence	0%
	E₃ Influence factor	Temperature E₃
	E₃ Deviation influence	2.3%
	E₄ Influence factor	Serial interference voltage (20V)
	E₄ Deviation influence	0.6%
	E₅ Influence factor	Probe-and auxiliary probe resistance
	E₅ Deviation influence	10%
Test Voltage	3.7kV
Protection Type	IP40; IEC/EN 60529
Electromagnetic Compatibility	Emission	IEC/EN 61326 Class B
Electromagnetic Compatibility	Immunity	IEC/EN 61326 Annex C
R_E Resistance Measurement	Measurement method	Current-voltage measurement with improved attenuation, no compensation of measurement lead resistance, with probe (3-pole) or without probe (2-pole), as per IEC/EN 61557-5
	Open circuit voltage	23 to 24 Vac
	Short circuit current	> 50mA ac
	Current measurement frequency	128 Hz
	Maximum permissible overload	250 Veff
Measuring Time	8 seconds (average from when START is pressed)
Limit Input	Tester retains set value even if instrument is turned off (assuming battery power supply is sufficient)
Automatic Changeover of Resolution	R_H	<7 kΩ
	Resolution	0.01Ω
	R_H	<50 kΩ
	Resolution	0.1Ω
	R_H	>50 kΩ
	Resolution	1Ω
Interference Voltage Display dc+ac	Vmax	30 Veff
	Common mode rejection	>80dB at 50Hz and 60Hz
	Ri	680 kΩ
	Measurement uncertainty	<10% for pure ac and dc signals

0.15Ω to 20Ω	Resolution	0.01Ω
0.15Ω to 20Ω	Display range	0 to 19.99Ω
200Ω	Resolution	0.1Ω
200Ω	Display range	20 to 199.9Ω
2kΩ	Resolution	1Ω
	Display range	200 to 1999Ω
Intrinsic Uncertainty	± (6% of measured value + 5 digits)
Operating Uncertainty IEC 61557 (note 1.)	± (18% of measured value + 5 digits)


Note 1.	Covers all deviations caused by influence quantities E₁ to E₅
	If the deviation E₄ caused by high probe or auxiliary probe resistance is higher than specified flashes. Measured values are outside of the specified operating uncertainty.