3M 701-L - User Manual

The 3M Model 701 Test Kit for Static Control Surfaces is a comprehensive kit designed for evaluating the resistive characteristics of static control work surfaces and flooring. It includes a lightweight, user-friendly megohmmeter and all necessary accessories, packaged in a foam-lined carrying case. The kit is intended for use in a manner described in its operator's manual and meets the intent of ANSI/ESD Standard 4.1 ("Worksurfaces - Resistive Characterization"), ANSI/ESD Standard 7.1 ("Floor Materials - Resistive Characterization of Materials"), and MIL-PRF-87893 ("Workstation, Electrostatic Discharge (ESD) Control") for auditing purposes.

Function Description:

The core of the kit is the Model 701 Megohmmeter, a hand-held instrument with four test functions:

Surface Test (Resistance Measurement): Measures surface-to-ground and surface-to-surface resistance at two prescribed test voltages (10 V and 100 V). The OHMS scale indicates the measured resistance.
Battery Test: Verifies the open circuit output test voltage of the main battery, indicating its charge level on the BATTERY scale.
Continuity Test: Checks the electrical continuity of the test setup (meter, leads, weights, and calibration plate) using the CONTINUITY scale.
Instrument Performance Verification: Ensures proper operation of the megohmmeter.

The megohmmeter features separate, easy-to-read scales that are both color-coded and numbered.

Important Technical Specifications:

Kit (Product No. 701):

Weight: 14 lb. (6.35 kg)
Case Dimensions: 5.125 H x 10 W x 13.5 in. L (13.02 x 25.4 x 34.29 cm)
Case Material: Blow-molded, high-density polyethylene with foam inserts
Case Color: Gray
Contents:
- 1 Megohmmeter (12 oz. / 340 g)
- 2 Test Weights (5 lbs. / 2.27 kg each)
- 2 Test Leads (10 ft. / 3 m each)
- 1 Insulated Bulldog Clip
- 1 Alligator Clip
- 1 Continuity Test Plate
- 2 Batteries (22.5 V and 1.5 V)
- 1 Operator's Manual
- 1 Molded Carrying Case

Megohmmeter (Product No. 701-M):

Weight: 12 oz. (0.34 kg)
Dimensions: 1.8 H x 3.3 W x 4.6 in. L (4.57 x 8.38 x 11.68 cm)
Resistance Ranges:
- Continuity Test Mode: 0 - 10M ohm (internal R=500 K ohm)
- 10 V Surface Test Mode: 10⁵ - 10¹¹ ohm (internal R=2 M ohm)
- 100 V Surface Test Mode: 10⁵ - 10¹¹ ohm (internal R=2 M ohm)
Open Circuit Voltage: 10V ± 0.7V (10V Surface), 100V ± 0.7V (100V Surface)
Internal Resistance: 500 Ω (Continuity), 2 Ω (10V Surface), 2 Ω (100V Surface)
Measurement Accuracy: ±5% ±2° of arc.
Battery Test Accuracy: ±2% ±2° of arc.
Operating Temperature: 65°F (18°C) to 82°F (28°C)
Relative Humidity: Up to 90%
Altitude: Up to 2000m
Pollution Degree: 2, Class 3 equipment

Test Weights (Product No. 701-W):

Quantity: 2
Weight: 5 lb. (2.27 kg) each
Dimensions: Diameter - 2.5 in. (6.35 cm), Height - 5.06 in. (12.85 cm); includes handle and pad
Pad Material: Conductive silicone rubber
Pad Dimensions: Diameter - 2.5 in. (6.35 cm), Thickness - 0.25 in. (0.64 cm)

Test Leads (Product No. 701-L):

Length: 10 ft. (3.05 m)
Wire Size: 18 gauge
Insulation: Silicone rubber
Diameter: 0.125 in. (0.32 cm)

Power Supply:

Batteries: 22.5 volt (Eveready™ #505 or equivalent) and 1.5 volt (AA)

Usage Features:

Main Selector Switch: Allows selection of desired test function (BATTERY TEST, OFF, SURFACE TEST 10V, SURFACE TEST 100V, CONTINUITY TEST).
TEST Button: Engages the instrument and activates the selected test function.
Mechanical Zero Adjust: Used to zero the pointer on the OHMS scale.
Test Procedures: Detailed instructions are provided for Battery Test, Continuity Test, and Surface Test (Resistance Measurement) for both periodic performance testing and qualification of installed static control surfaces, as well as evaluation of static control materials.
ESD Standard Compliance: The kit is designed to facilitate measurements as specified by ESD Association Standards S4.1 and S7.1.
Safety Warnings: The manual includes clear warnings and cautions regarding proper handling, connections, and battery installation to prevent damage to the equipment or personal injury. For example, users are warned not to use the instrument to measure live circuits and to turn it off before connecting/disconnecting leads or moving weights.

Maintenance Features:

Battery Replacement: Instructions are provided for safely replacing the 22.5V and 1.5V batteries. Users are cautioned against improper battery installation.
Test Weight Cleaning: Guidelines for cleaning the conductive rubber pads on the test weights using a 70% Isopropyl alcohol/water mixture to prevent continuity test failures due to soiling.
Zero Adjustment: Instructions for adjusting the mechanical zero of the pointer on the OHMS scale to compensate for handling, vibration, or other causes.
User-Replaceable Parts: A list of replacement parts is provided, including the megohmmeter, test weights, test leads, carrying case, clips, operator's manual, and batteries, along with their respective part numbers.
Warranty Information: Details on the 1-year warranty for defects in material and manufacture, and procedures for shipping warranty and non-warranty returns.
Technical Support: Contact information for 3M Technical Service is provided for maintenance beyond the scope of the user manual.