Fluke 1625/1623 GEO Earth Ground Testers

Description

The Fluke 1623 and 1625 are distinctive earth ground testers that can perform all four types of earth ground measurement. Specifically, the Fluke 1623 and 1625 testers are able to measure earth ground loop resistances using only clamps – called Stakeless testing. This method doesn't require the use of earth ground stakes or the disconnection of ground rods.

Fluke 1625/1623 Testing Methods

3- and 4-Pole Fall of Potential – standard earth ground testing using two ground stakes

Selective testing – without disconnecting ground rods, a technician can measure ground resistance using a combination of stakes and a clamp.

Stakeless testing – innovative solution using only clamps, instead of ground stakes, to measure earth ground loop resistance.
Fluke 1625 Offers These Advanced Features

Automatic Frequency Control (AFC) – identifies existing interference and chooses a measurement frequency to minimize its effect, providing a more accurate earth ground value.

R* measurement – calculates earth ground impedance at 55 Hz to more accurately reflect the earth ground resistance that a fault-to-earth ground would see.

Adjustable limits – for quick test result verification.

Features

Fluke 1623

One-button measurement concept
3- and 4-pole earth ground measurement
4-pole soil resistivity testing
Selective testing, no disconnection of ground conductor (1 clamp)
Stakeless testing, quick ground loop testing (2 clamps)
Measuring frequency 128 Hz

Fluke 1625

3- and 4-pole earth ground measurement
4-Pole soil resistivity testing
2-pole resistance measurement AC
2- and 4-pole resistance measurement DC
Selective testing, no disconnection of ground conductor (1 clamp)
Stakeless testing, quick ground loop testing (2 clamps)
Earth impedance measurement at 55 Hz
Automatic frequency control (AFC) (94, 105, 111, 128 Hz)
Measuring voltage switchable 20/48V
Programmable limits, settings
Continuity with buzzer

Download Data Sheet

Specifications

RA 3-pole ground resistance measurement (IEC 1557-5)

Measuring Voltage

Fluke 1623	Vm = 48 V ac
Fluke 1625	Vm = 20/48 V ac

Short circuit current

Fluke 1623	> 50 mA
Fluke 1625	250 mA ac

Measure frequency

Fluke 1623	128 Hz
Fluke 1625	94, 105, 111, 128Hz

Resolution

Fluke 1623	0.001 Ω to 10 Ω
Fluke 1625	0.001 Ω to 100 Ω

Measuring range

Fluke 1623	0.001 Ω to 19.99 kΩ
Fluke 1625	0.001 Ω to 299.9 kΩ

Intrinsic error

Fluke 1623	± (2 % of reading + 3 digit)
Fluke 1625	± (2 % of reading + 2 d)

Operating error

Fluke 1623	± (5 % of reading + 3 d)
Fluke 1625	± (5 % of reading + 5 d)

RA 4-pole ground resistance measurement (IEC 1557-5)

Measuring Voltage

Fluke 1623	Vm = 48 V ac
Fluke 1625	Vm = 20/48 V ac

Short circuit current

Fluke 1623	> 50 mA
Fluke 1625	250 mA ac

Measure frequency

Fluke 1623	128 Hz
Fluke 1625	94, 105, 111, 128Hz

Resolution

Fluke 1623	0.001 Ω to 10 Ω
Fluke 1625	0.001 Ω to 100 Ω

Measuring range

Fluke 1623	0.001 Ω to 19.99 kΩ
Fluke 1625	0.001 Ω to 299.9 kΩ

Intrinsic error

Fluke 1623	± (2 % of reading + 3 d)
Fluke 1625	± (2 % of reading + 2 d)

Operating error

Fluke 1623	± (5 % of reading + 3 d)
Fluke 1625	± (5 % of reading + 5 d)

RA 3-pole ground resistance measurement with current clamp

Measuring Voltage

Fluke 1623	Vm = 48 V ac
Fluke 1625	Vm = 20/48 V ac

Short circuit current

Fluke 1623	> 50 mA
Fluke 1625	250 mA ac

Measure frequency

Fluke 1623	128 Hz
Fluke 1625	94, 105, 111, 128Hz

Resolution

Fluke 1623	0.001 Ω to 10 Ω
Fluke 1625	0.001 Ω to 10 Ω

Measuring range

Fluke 1623	0.001 Ω to 19.99 kΩ
Fluke 1625	0.001 Ω to 29.99 kΩ

Intrinsic error

Fluke 1623	± (7 % of reading + 3 d)
Fluke 1625	± (7 % of reading + 2 d)

Operating error

Fluke 1623	± (10 % of reading + 5 d)
Fluke 1625	± (10 % of reading + 5 d)

RA 4-pole selective ground resistance measurement with current clamp

Measuring Voltage

Fluke 1623	Vm = 48 V ac
Fluke 1625	Vm = 20/48 V ac

Short circuit current

Fluke 1623	> 50 mA
Fluke 1625	250 mA ac

Measure frequency

Fluke 1623	128 Hz
Fluke 1625	94, 105, 111, 128Hz

Resolution

Fluke 1623	0.001 Ω to 10 Ω
Fluke 1625	0.001 Ω to 10 Ω

Measuring range

Fluke 1623	0.001 Ω to 19.99 kΩ
Fluke 1625	0.001 Ω to 29.99 kΩ

Intrinsic error

Fluke 1623	± (7 % of reading + 3 d)
Fluke 1625	± (7 % of reading + 2 d)

Operating error

Fluke 1623	± (10 % of reading + 5 d)
Fluke 1625	± (10 % of reading + 5 d)

Stakeless ground loop measurement

Measuring Voltage

Fluke 1623	Vm = 48 V ac
Fluke 1625	Vm = 20/48 V ac

Measure frequency

Fluke 1623	128 Hz (125 Hz on request)
Fluke 1625	94, 105, 111, 128Hz

Noise current (Iext)

Fluke 1623	Max. Iext = 10 A (ac) (RA < 20 Ω)
	Max. Iext = 2 A (ac) (RA < 20 Ω)
Fluke 1625	Max. Iext = 3 A

Resolution

Fluke 1623	0.001 Ω to 0.1 Ω
Fluke 1625	0.001 Ω to 10 Ω

Measuring range

Fluke 1623	0.001 Ω to 199.9 kΩ
Fluke 1625	0.001 Ω to 29.99 kΩ

Intrinsic error

Fluke 1623	± (7 % of reading + 3 d)
Fluke 1625	± (7 % of reading + 2 d)

Operating error

Fluke 1623	± (10 % of reading + 5 d)
Fluke 1625	± (10 % of reading + 5 d)

Environmental Specifications

Working temperature

-10 °C to +50 °C

Operating Temperature

0 °C to +35 °C

Nominal temperature

+18 °C to +28 °C

Storage Temperature

Fluke 1623	-20 °C to +60 °C
Fluke 1625	-30 °C to +60 °C

Climatic class

C1 (IEC 654-1), -5 °C to + 45 °C, 5 % to 95 % RH

Protection type

IP56 for case, IP40 for battery door according to EN 60529

Safety Specifications

Safety Rating

CAT II, 300 V

Mechanical & General Specifications

Display

Fluke 1623	1999 digit LCD – display with special symbols, digit height 25 mm, fluorescent backlight
Fluke 1625	2999 Digit LCD – 7 segment liquid crystal display with special symbols and backlight