R1M-A, R1M-AR Revised August, 2004
MEGOHMMETER
MODEL R1M-A, R1M-AR
Operation and Maintenance Manual
PN# R1M-A-900-01 Publication Date: December 2012 REV. C
REPRODUCTION AND DISTRIBUTION OF THIS TECHNICAL MANUAL IS AUTHORIZED FOR US GOVERNMENT PURPOSES. TEGAM PROPRIETARY INFORMATION.
NOTE: This User’s Manual was as current as possible when this product was manufactured. However, products are constantly being updated and improved. To ensure you have the latest documentation, refer to www.tegam.com 10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110 • [email protected]
TABLE OF CONTENTS Revised August, 2004
TABLE OF CONTENTS
1. INSTRUMENT DESCRIPTION Purpose ...... 1-1 Performance Characteristics ...... 1-1 Description of Equipment ...... 1-2 List of Items Furnished ...... 1-3 Storage and Shipping Requirements ...... 1-3
2. PREPARATION FOR USE AND INSTALLATION Unpacking and Inspection ...... 2-1 Preparation for Use ...... 2-1 Figure 1: Connection Diagram ...... 2-3
3. OPERATING INSTRUCTIONS Pushbutton Functions ...... 3-1 General Theory of Operation ...... 3-2
4. PRINCIPLES OF OPERATION
5. MAINTENANCE Inspection ...... 5-1 Cleaning ...... 5-1 Test Equipment required for Calibration and Repair ...... 5-1 Performance Verification ...... 5-2 Calibration ...... 5-3 Troubleshooting ...... 5-4 Table 2: Fault Symptoms and Repair Actions ...... 5-5 Preparation for Shipment ...... 5-6 Overhaul Instructions ...... 5-6 Figure 2: Front Panel Controls ...... 5-7 Figure 3: Front Panel-Rear View ...... 5-8 Figure 4: Simplified Block Diagram ...... 5-9 Figure 5: Power Supply Schematic ...... 5-10 Figure 6: Power Supply Layout ...... 5-11 Figure 7a, 7b: Display Board Schematic ...... 5-12 Figure 8: Display Board Parts Layout ...... 5-14 Figure 9: System (Side View) Layout ...... 5-15 Table 3, 4, 5, 6: Parts List ...... 5-16 Table 7: Vendor Cage Code Directory ...... 5-19
6. SERVICE INFORMATION Preparation for Repair or Calibration Service ...... 6-1 Expedite Repair and Calibration Form ...... 6-2 Warranty ...... 6-3
10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110 • [email protected]
INSTRUMENT DESCRIPTION Revised August, 2004 SECTION 1
INSTRUMENT DESCRIPTION
INTRODUCTION
1.1 Purpose
The Model RIM-A Megohmmeter is a portable instrument used to measure high values of resistance. It is enclosed in a rugged weather-resistant housing designed for severe industrial and military applications. The Model RIM-A may be used to measure resistances between 50 kΩ and 10 GΩ with 50 V test voltage, and between 1 MΩ and 200 GΩ with 100 V, 250 V, or 500 V test voltage.
1.2 Performance Characteristics
This is a digital reading instrument with six resistance ranges and four test voltage ranges.
Full Scale Resolution Test Voltage Range (Ω) (Ω) (V) 1 1 M 1 k 2 10 M 10 k 3 100 M 100 k 50 100, 4 1 G 1 M 250, 5 10 G 10 M or 500 6 100 G 100 M
Table 1: Specifications
Accuracy: Resistance accuracy on all ranges: ± 5% Test Voltage accuracy on all ranges: ± 3%
10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110 • [email protected] 1-1 INSTRUMENT DESCRIPTION Revised August, 2004 1.3 Description of Equipment
Physical: A rugged heavy-duty case is provided to contain and protect the instrument. When closed, a gasket seals the lid to protect the instrument against water and dirt while the instrument is carried through rainstorms or other hazardous conditions. The lid is secured by two latches. A handle is provided for portability. A compartment is provided for storage of test cables and line cord.
Dimensions: 216 mm (8.5”) x 228 mm (9”) x 152 mm (6”). Weight is 2.3 kg (5 lb). Controls and connectors are of a size and spacing such that the instrument may be operated while wearing safety gloves.
Electrical: Input power is from the AC power line