Figure 1-1. Ohmmeter ZM-21B/U.
CHAPTER 1. INTRODUCTION - TM-11-6625-298-140007
Figure 1-2. Ohmmeter ZM-21(*)/U, exterior view.
CHAPTER 2. SERVICE UPON RECEIPT AND INSTALLATION - TM-11-6625-298-140009
Figure 2-1. Packaging of Ohmmeter ZM-21/U.
Section II. INSTALLATION
CHAPTER 3. OPERATING INSTRUCTIONS - TM-11-6625-298-140013
Insulation Resistance
Figure 3-1. Connections for testing a.c. or d.c. rotating machines.
Figure 3-2. Connection for testing transformers.
Insulation Test of Insulating Bushings
Insulation Test of Power Cables and Wires
Insulation Test of Telephone Cables and Wires and Minimum Insulation Resistance values
Table 3-2. Required Insulation Resistance for Telephone Cables
Test of Wiring Installations.
Section III. OPERATION UNDER UNUSUAL CONDITIONS
CHAPTER 4. OPERATOR AND ORGANIZATIONAL MAINTENANCE INSTRUCTIONS
Section IV. MAINTENANCE OF OHMMETER
CHAPTER 5. FUNCTIONING OF EQUIPMENT - TM-11-6625-298-140025
Controller
Resistance Network
Working Circuit
Guard Circuit
CHAPTER 6. GENERAL SUPPORT MAINTENANCE INSTRUCTIONS
Figure 6-1. Ohmmeter, side of chassis
Preliminary Inspection
Figure 6-3. End shield and chassis assembly.
Table 6-13. Troubleshooting
Isolating Trouble
Replacement of controller
Lubrication of the Ohmmeter
APPENDIX A. REFERENCES - TM-11-6625-298-140039
APPENDIX C. MAINTENANCE ALLOCATION - TM-11-6625-298-140041
Tool and Test Equipment Requirements (Table 1)
SECTION II. MAINTENANCE ALLCATION CHART FOR OHMMETER ZM*21/U, ZM-21A/U, AND ZM-21B/U
TABLE I. TOOL AND TEST EQUIPMENT REQUIREMENTS FOR OHMMETER ZM-21/U, ZM-21A/U, AND ZM-21B/U
TM-11-6625-298-14 Ohmmeter ZM-21/U ( NSN 5950-00-645-2191 ) Ohmmeter ZM-21A/U ( N S N 6625-00-643-1030) and Ohmmeter ZM-21B/U ( NSN 6625-00-581-2466) Manual
CHAPTER 1. INTRODUCTION - TM-11-6625-298-140007
Figure 1-2. Ohmmeter ZM-21(*)/U, exterior view.
CHAPTER 2. SERVICE UPON RECEIPT AND INSTALLATION - TM-11-6625-298-140009
Figure 2-1. Packaging of Ohmmeter ZM-21/U.
Section II. INSTALLATION
CHAPTER 3. OPERATING INSTRUCTIONS - TM-11-6625-298-140013
Insulation Resistance
Figure 3-1. Connections for testing a.c. or d.c. rotating machines.
Figure 3-2. Connection for testing transformers.
Insulation Test of Insulating Bushings
Insulation Test of Power Cables and Wires
Insulation Test of Telephone Cables and Wires and Minimum Insulation Resistance values
Table 3-2. Required Insulation Resistance for Telephone Cables
Test of Wiring Installations.
Section III. OPERATION UNDER UNUSUAL CONDITIONS
CHAPTER 4. OPERATOR AND ORGANIZATIONAL MAINTENANCE INSTRUCTIONS
Section IV. MAINTENANCE OF OHMMETER
CHAPTER 5. FUNCTIONING OF EQUIPMENT - TM-11-6625-298-140025
Controller
Resistance Network
Working Circuit
Guard Circuit
CHAPTER 6. GENERAL SUPPORT MAINTENANCE INSTRUCTIONS
Figure 6-1. Ohmmeter, side of chassis
Preliminary Inspection
Figure 6-3. End shield and chassis assembly.
Table 6-13. Troubleshooting
Isolating Trouble
Replacement of controller
Lubrication of the Ohmmeter
APPENDIX A. REFERENCES - TM-11-6625-298-140039
APPENDIX C. MAINTENANCE ALLOCATION - TM-11-6625-298-140041
Tool and Test Equipment Requirements (Table 1)
SECTION II. MAINTENANCE ALLCATION CHART FOR OHMMETER ZM*21/U, ZM-21A/U, AND ZM-21B/U
TABLE I. TOOL AND TEST EQUIPMENT REQUIREMENTS FOR OHMMETER ZM-21/U, ZM-21A/U, AND ZM-21B/U
TM-11-6625-298-14 Ohmmeter ZM-21/U ( NSN 5950-00-645-2191 ) Ohmmeter ZM-21A/U ( N S N 6625-00-643-1030) and Ohmmeter ZM-21B/U ( NSN 6625-00-581-2466) Manual
