Fluke 1621 Earth Ground Tester

The Fluke 1621 Earth Ground Tester is an easy to use instrument for ground resistance testing, and is the most important aspect of preventative maintenance measures for detecting reliable ground connections.

The 1621 has basic ground testing methods such as 2 pole ground resistance as well as 3 pole Fall of Potential tests. Its easy to handle size, large LCD display, and durable holster make it an ideal unit for earth ground testing in most electrical grounding work environments. The Fluke 1621 is a great grounding tool for earth ground specialists, utility test engineers, and electrical contractors.

1621 Earth Ground Tester Includes

Users Manual
Two 6 foot measuring leads with alligator clips
LR61 9 V alkaline battery
Yellow protective holster
CD-ROM

1621 Earth Ground Tester Features

3 pole Fall of Potential earth testing for basic measurements
Added versatility with 2 pole resistance measurements
One button operation to easily capture values
Automatic noise voltage detection ensures accurate measurements
Increased user protection with hazardous voltage warning
Clearly record and read data with a large backlit LCD display
Rugged design for harsh work environments
Portable, compact size
Instant alert for measurements outside of your set limit using the adjustable limit setting
600 V Cat II

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