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IDEAL 61-920 Ground Resistance Clamp Meter Manual

Summary

Essential technical service guide for the high-precision ground and earth resistance clamp tester. Designed for qualified electricians and technicians, this manual provides complete operational knowledge, ensuring safe and accurate servicing of critical grounding systems. Key content areas include detailed safety protocols, full specifications (AC/DC current), performance verification procedures, step-by-step calibration adjustments, advanced troubleshooting paths, disassembly guides, and a comprehensive spare parts inventory.

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Page 1 Text Content

IDEAL INDUSTRIES, INC. TECHNICAL MANUAL MODEL: 61-920

The Service Information provides the following information: • Precautions and safety information • Specifications • Performance test procedure • Calibration and calibration adjustment procedure • Basic maintenance (Disassembly, Troubleshooting, Spare Parts list)

Form number: TM61920 Revision: 3. Date: June 2006

Form number TM61920 Rev 3 June 2006

Page Summary Contents For IDEAL 61-920 Ground Resistance Clamp Meter Manual

Page 1 IDEAL INDUSTRIES, INC. TECHNICAL MANUAL MODEL: 61-920 The Service Information provides the following information: • Precautions and safety information • Specifications • Performance test procedure • C...
Page 2 TABLE OF CONTENTS Title Page Introduction 1 Precautions and Symbol Information 1 Safety Information 2 Specifications 3 General Specification 3 Ground Resistance Specifications 4 Ground & Leakage C...
Page 3 Introduction Warning To avoid shock or injury, do not perform the verification tests or calibration procedures described in this manual unless you are qualified to do so. The information provided in t...
Page 4 SAFETY Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it. To avoid potential hazards, use the product only as specified. CAUTIO...
Page 5 General specifications Characteristics Description Display LCD with a maximum count of 2099 Conductor Size Approximately 1.25” in diameter max. Overrange Indication “OL” Sampling Rate Approx once per ...
Page 6 RANGES and ACCURACY SPECIFICATION Measurement Characteristics (All at 75°F ± 5°C, < 85% R.H.) Ground Resistance Range Measuring Range Resolution Accuracy 1200Ω 400Ω - 599Ω 1Ω ± 10.0% ± 10Ω 600Ω - 1...
Page 7 PERFORMANCE VERIFICATIONS Perform the following analysis, if the meter conforms to the limits listed in Table 1 the meter is functioning correctly. If the meter does not conform to any of the listed l...
Page 8 CALIBRATION (1) Calibration Preparation (1.1) This procedure consists of the following sections. (1) Calibration Preparation (2-6) Adjustments (7) Disassembly and Component Layout (8) Trouble-shooting...
Page 9 (2) Calibration Procedure It is recommended that all IDEAL meters undergo the following calibration procedure on an annual basis. POWER (2.1) Press the POWER button, without clamping anything, SW whil...
Page 10 (3.5) Repeatability check with 1000Ω and re-adjustment Press the ▲ button twice. Then “F.S” is displayed at the upper position of the LCD. Use 1000Ω resistor. Open and close the jaws, and check the re...
Page 11 (5.3) Adjust the current range (cont’d.) (d). 30.0A adjustment Press the MEM/MODE button once. Generation current: 30A@50Hz Press the MEM/WRITE button after the reading becomes stable. (saving the adj...
Page 12 (8). Trouble shooting Symptoms Possible Causes Remedies The instrument cannot be No batteries. Set the batteries. buttoned on. Faulty battery polarity Install batteries in correct polarity. Insufficie...
Page 13 (8). Trouble shooting (cont’d.) Symptoms Possible Causes Remedies When measuring Insufficient capacity of battery Replace the battery if “BATT” mark is resistance, displayed on the LCD. error of measu...
Page 14 (8). Trouble shooting (cont’d.) Incapable of saving data. Switch spacer for MEM WRITE Put the Button spacer at the specific button is missing. location. Defect of circuit component Check above points ...
Page 15 POWER SW CAL SW Fig. 3 Button layout Form number TM61920 Rev 3 June 2006

Manual Details

Brand Ideal
Pages 15
File Size 408.75 KB
Published May 23, 2026
71 views

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Frequently Asked Questions

What is the maximum conductor size for the device?

The conductor size can be a maximum of approximately 1.25 inches in diameter.

Is it safe to use this meter in wet conditions?

No, do not operate this product in wet or damp conditions to avoid electric shock.

What kind of batteries does the model use?

The power source requires four 'AA' batteries.

How do I troubleshoot a backlight that won't light up?

Check if the soldered point at the backlight is properly connected; otherwise, replace the PCB and re-adjust.

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