Fluke 1621 Earth Ground Tester

Category: Earth Ground Tester

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Tag: #Earth Ground Tester #Fluke 1621

Earth Ground Tester for resistance measurement

The Fluke 1621 is an easy-to-use earth ground tester. For ground resistance testing, the 1621 is the first line of defense in detecting reliable ground connections. The unit features basic ground testing methods including 3-pole Fall-of-Potential as well as 2-pole ground resistance tests. Its convenient size, rugged holster, and large, clear LCD display make it an ideal field earth ground tester, for most electrical grounding work environments. With a simple user interface and intuitive functionality, the Fluke 1621 is a handy grounding tool for electrical contractors, utility test engineers, and earth ground specialists.

General specifications

Measuring 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

Measuring rate

2 measurements/second

Battery[1]

One 9 volt alkaline (LR61)

Battery condition

LO-BAT is displayed if voltage drops below 6.5 V

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[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, 600 V CAT II, pollution degree 2

Dimensions

113 mm x 54 mm x 216 mm (4.5 in x 2.1 in x 8.5 in), including holster

Weight

850 g (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.

Electrical specifications

Maximum deviations:

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 (20 V)
E₄ Deviation influence	0.6 %
E₅ Influence factor	Probe- and auxiliary probe resistance
E₅ Deviation influence	10 %

Test voltage

3.7 kV

Protection type

IP 40; IEC/EN 60529

Electromagnetic compatibility

	Emission: IEC/EN 61326 Class B
	Immunity: IEC/EN 61326 Annex C

R_E resistance measurement

Measuring method	Current-voltage measurement with improved cross-talk attenuation, no compensation of measuring lead resistance, with probe (3-pole) or without probe (2-pole), as per IEC/EN 61557-5
Open circuit voltage	23 to 24 V ac
Short circuit current	> 50 mA ac
Measuring 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	0.01 Ω
R_H	< 50 kΩ
Resolution	0.1 Ω
R_H	> 50 kΩ
Resolution	1 Ω

Interference voltage display dc + ac

Vmax	30 Veff
Common mode rejection	> 80 dB at 50 Hz and 60 Hz
Ri	680 kΩ
Measuring uncertainty	< 10 % for pure ac and dc signals

Measuring range

0.15 Ω to 20 Ω

Resolution	0.01 Ω
Display range	0 to 19.99 Ω

200 Ω

Resolution	0.1 Ω
Display range	20 to 199.9 Ω

2 kΩ

Resolution	1 Ω
Display range	200 to 1999 Ω

Intrinsic uncertainty

± (6 % of measured value + 5D)

Operating uncertainty IEC 61557[1]

± (18 % of measured value + 5D)

Notes:

[1] Covers all deviations caused by influence quantities E₁-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.