- Typical recommended interval is every 12 months. Some quality systems or heavy/critical use may justify 6–12 months. Always follow your organization’s quality plan or regulatory requirements.

Calibrate Your Fluke 1621
If you own a Fluke 1621 Earth Ground Tester, accurate calibration isn’t optional. It’s essential for safety, compliance, and confidence in every measurement.
Rogue Calibration simplifies calibration sourcing for Fluke equipment by connecting you directly with qualified, vetted calibration service providers from our trusted network—without the time-consuming search.
What Rogue Calibration Delivers
- Direct access to experienced calibration providers
- Fair, competitive pricing through provider competition
- Clear turnaround times before you commit
- Accredited and traceable calibration options
- Documentation suitable for ISO, FDA, and regulated environments
Our network supports a wide range of instruments and calibration requirements, helping you avoid phone tag, unclear quotes, and one-size-fits-all labs.
Whether you need a single Fluke 1621 calibration or are managing a full fleet of instruments, Rogue Calibration helps you stay compliant, reduce downtime, and keep costs competitive—without locking you into a single lab or long-term contract.
Get connected. Get calibrated. Get back to work.
Our partners provide traceable electrical calibration services to help ensure measurement accuracy, compliance, and continued usability of your equipment.
Quick Overview
- What it is: Handheld earth/ground resistance tester (2-pole and 3-pole methods).
- Typical use: Verifying ground electrode resistance for facilities, substations, lightning protection, and equipment safety grounding.
- Status: Legacy/discontinued model; replaced by newer Fluke earth ground testers (e.g., 1623-2, 1625-2), but still serviceable and calibratable.
The Fluke 1621 Earth Ground Tester is trusted because it’s engineered for accuracy in demanding environments—but that accuracy only holds if it’s calibrated by experts who truly understand the instrument.
Measurements at this level leave no room for shortcuts or generic adjustments. Expert calibration ensures your Fluke 1621 is tested against traceable standards, adjusted correctly when needed, and documented properly—so the numbers you see are the numbers you can stand behind.
When decisions, safety, and compliance are paramount, precision isn’t optional. It’s earned through professional calibration done right.


Who is Rogue Calibration?
Built for speed, clarity, and real-world use, Rogue brings a modern approach to a process that hasn’t changed in decades. We're about simplicity... because we know this space and we have the tools to solve this problem We're results-obsessed.
We focus on: Clear requests, Connections with trusted providers, Better outcomes for both sides.
www.roguecalibration.com
Why Fluke Owners Use Rogue Calibration
Fluke equipment is widely used across industrial and commercial environments, but finding the right Fluke 1621 calibration provider doesn’t have to be difficult.
Rogue Calibration saves you time and money by connecting you with experienced labs, competitive pricing, traceable calibration options, and clear turnaround times, so you can choose the right provider with confidence.

We are:
- A calibration inquiry and sourcing service for your Fluke 1621 Earth Ground Tester
- A neutral connector between equipment owners and service providers
- Focused on saving you time and reducing friction
We are not:
- A calibration lab
- A reseller of calibration services
- Locked to one provider or location
Our goal is simple: give you choices and let the market work for you.
Product Information
- Manufacturer: Fluke
- Model Number: 1621
- Model Details: A portable, battery-powered earth/ground resistance tester for performing two- and three-pole (fall-of-potential) ground tests on grounding systems.
- Category: 1621 Earth Ground Tester
- Calibration Discipline:
Why Fluke 1621 Earth Ground Tester Owners Use Rogue Calibration
The Fluke 1621 Earth Ground Tester is a trusted tool in industrial, commercial, and maintenance environments. But finding the right calibration provider can be time‑consuming.
Rogue Calibration helps you save time and money by:
- Eliminating the need to contact multiple labs
- Encouraging competitive pricing
- Connecting you with providers experienced in Fluke instruments
- Supporting traceable calibration options (ISO / NIST / ANSI, depending on provider)
- Letting you compare turnaround times before you commit
