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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.
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- 3-pole Fall-of-Potential earth testing for basic measurements
- 2-pole resistance measurements for added versatility
- Easily capture values with single-button operation
- Ensure accurate measurements with automatic ‘noise’ voltage detection
- Hazardous voltage warning offers increased user protection
- Clearly read and record data with a large, backlit display
- Rugged holster and design for tough work environments
- Portable size allows for easy transportation
- Instantly be alerted to measurements outside of your set limit, when you use the adjustable limit setting
- 600 V Cat II
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| General specifications |
| Measuring functions |
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3-pole earth ground resistance, 2-pole ac resistance of a conductor,
Interference voltage |
| | Intrinsic error |
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Refers to the reference temperature range and is guaranteed for one year |
| | Measuring rate | | | Battery[1] |
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One 9 volt alkaline (LR61) |
| | Battery condition |
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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 |
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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 |
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± 0.1 % of range per degree Kelvin |
| | Safety |
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IEC/EN 61010-1, 600 V CAT II, pollution degree 2 |
| | Dimensions |
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113 mm x 54 mm x 216 mm (4.5 in x 2.1 in x 8.5 in), including holster |
| | Weight |
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850 g (1.9 lb), including standard accessories, volume approximately 600 cm3 |
| | Note: |
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[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. |
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[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. |
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| 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 | | | Protection type | | | Electromagnetic compatibility |
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Emission: IEC/EN 61326 Class B |
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Immunity: IEC/EN 61326 Annex C |
| | RE 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 |
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8 seconds (average from when START is pressed) |
| | Limit input |
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Tester retains set value even if instrument is turned off (assuming
battery power supply is sufficient) |
| | Automatic changeover of resolution |
| RH |
< 7 kΩ |
| Resolution |
0.01 Ω |
| RH |
< 50 kΩ |
| Resolution |
0.1 Ω |
| RH |
> 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 |
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| 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 |
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± (6 % of
measured value
+ 5D) |
| | Operating uncertainty IEC 61557[1] |
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± (18 % of measured value + 5D) |
| | Notes: |
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[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. |
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| Model Name | Description | Price List | | Fluke 1621 |
Earth Ground Tester
1621 includes:
- Users manual
- Two measuring leads with alligator clips, 2 m (6 ft)
- One battery, 9 V alkaline (LR61)
- One protective holster, yellow
- One CD-ROM
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| | Fluke 1621 Kit |
Kit, Basic Earth Ground Tester
Includes:
- Fluke 1621 Tester
- 2 cable reels with wire (1-50m, 1-25m)
- 3 earth ground stakes
- 1 Test lead (red and black 2m)
- 2 Alligator Clips
- Batteries
- Users manual
- Hard carrying case
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| Cables & Hardware | | GEO CABLE-REEL 25M | Ground/Earth Cable Reel 25 M Wire | | GEO CABLE-REEL 50M | Ground/Earth Cable Reel 50 M Wire |
| Cases and Holsters | | CXT280 | CXT280 Extreme Case |
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