Fluke 1621 - User Manual

Questions and Answers

M
Mrs. Tina PerezJul 27, 2025
What to do if resistance measurement result is not reliable in Fluke Measuring Instruments?
- H
  Henry SullivanJul 28, 2025
  To ensure reliable resistance measurements with your Fluke Measuring Instruments, position the probe stake and auxiliary electrode stake outside each other's potential gradient area and the earth ground electrode's area. Maintain a minimum distance of 20 m (64 ft) between the probe and the earth ground electrode, and between the auxiliary electrode and the probe. If the soil conditions require it, increase the distance until subsequent measurements are approximately the same.
S
Steven LeeAug 4, 2025
How to ensure resistance measurement is performed with the specified operating uncertainty on Fluke Measuring Instruments?
- J
  Jacqueline FryAug 4, 2025
  To ensure your Fluke Measuring Instruments resistance measurement is performed with the specified operating uncertainty, verify that the probe stake and the auxiliary electrode are firmly embedded in the soil and ensure that good connections exist between all connection points, such as test leads, connectors and alligator clips.
D
Daniel StanleyAug 11, 2025
What to do if auxiliary electrode resistance (RH) is too high in Fluke Measuring Instruments?
- J
  Jason MathisAug 11, 2025
  If the auxiliary electrode resistance (RH) is too high on your Fluke Measuring Instruments, verify that the auxiliary electrode stake is firmly embedded in the soil, and ensure that good connections exist between all connection points, like test leads, connectors and alligator clips.
S
Sarah CoxAug 19, 2025
What to do if probe resistance (RS) is too high in Fluke Measuring Instruments?
- T
  Thomas LandryAug 19, 2025
  If the probe resistance (RS) is too high on your Fluke Measuring Instruments, verify that the probe stake is firmly embedded in the soil, and ensure that good connections exist between all connection points, like test leads, connectors and alligator clips.

Summary

LIMITED WARRANTY AND LIMITATION OF LIABILITY

Introduction

Unpacking

Unpack Tester and accessories from shipping carton.

Packing

Use original packing material for shipping the Tester.

Safety Regulations

AA Warning

Identifies hazardous conditions that could cause bodily harm or death.

Symbols

Lists symbols found on the Tester or in the manual.

Accessories

Features

Software

LCD Display

The lighted LCD display shows readings, messages, and icons.

Key Operational Features

Interference Detection

Tester checks for interference voltage and stops if above 20 V.

Auto Shut-Off

Device turns off after 10 minutes of inactivity.

Resistance Limit Mode

Battery Installation

Operating Instructions

3-Pole Measurement

Procedure for performing a 3-pole measurement.

AC Resistance Measurement

Troubleshooting

Specifications

Maximum Deviations

RE Resistance Measurement

Describes the measuring method for RE resistance.

Measuring Range

Measuring time

Specifies the measurement time for the Tester.

Limit input

Tester retains set value even if instrument is turned off.

Storage

Service

Fluke 1621 Specifications

General

Type	Earth Ground Tester
Earth Voltage Measurement Range	0 to 200 V AC
Measurement Frequency	128 Hz
Accuracy	±(2% + 3 digits)
Power Supply	6 x AA batteries
Storage Temperature	-20 °C to 60 °C
Test Method	2-pole
Display	Digital LCD
Data Storage	No
Operating Temperature	-10°C to 50°C