Tektronix cdm250 User Manual

User Manual

CDM250

Digital Multimeter

070-6736-03

Copyright Tektronix, Inc. 1987. All rights reserved.

Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes that in all previously published material. Specifications and price change privileges reserved.

Tektronix, Inc., P.O. Box 1000, Wilsonville, OR 97070±1000

TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.

WARRANTY

Tektronix warrants that this product will be free from defects in materials and workmanship for a period of one (1) year from the date of shipment. If any such product proves defective during this warranty period, Tektronix, at its option, either will repair the defective product without charge for parts and labor, or will provide a replacement in exchange for the defective product.

In order to obtain service under this warranty, Customer must notify Tektronix of the defect before the expiration of the warranty period and make suitable arrangements for the performance of service. Customer shall be responsible for packaging and shipping the defective product to the service center designated by Tektronix, with shipping charges prepaid. Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the Tektronix service center is located. Customer shall be responsible for paying all shipping charges, duties, taxes, and any other charges for products returned to any other locations.

This warranty shall not apply to any defect, failure or damage caused by improper use or improper or inadequate maintenance and care. Tektronix shall not be obligated to furnish service under this warranty a) to repair damage resulting from attempts by personnel other than Tektronix representatives to install, repair or service the product; b) to repair damage resulting from improper use or connection to incompatible equipment; or c) to service a product that has been modified or integrated with other products when the effect of such modification or integration increases the time or difficulty of servicing the product.

THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THIS PRODUCT IN LIEU OF ANY OTHER WARRANTIES, EXPRESSED OR IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. TEKTRONIX' RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY. TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.

Table of Contents
General Safety Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . .	iii
Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	1
Preparing the Digital Multimeter for Use . . . . . . . . . . . . . . . . .	2
Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4
Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	7
Preparations for Measurement . . . . . . . . . . . . . . . . . . . . . . . . . .	7
Measuring AC or DC Voltage . . . . . . . . . . . . . . . . . . . . . . . . . .	7
Measuring AC or DC Current . . . . . . . . . . . . . . . . . . . . . . . . . .	8
Measuring Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	9
Checking Diodes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	10
Appendix A: Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . .	11
Appendix B: Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . .	17
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	17
Preparing for Shipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	17
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	18
No Display with Power On . . . . . . . . . . . . . . . . . . . . . . . . .	18
CDM250 Does Not Read Current (2A) . . . . . . . . . . . . . . . .	18
Display On but CDM250 Not Displaying Reading . . . . . . .	18
Display On but CDM250 Does Not Read Current (10A) . .	19
Appendix C: Replaceable Parts . . . . . . . . . . . . . . . . . . . . . . .	21
Standard Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	21
Optional Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	21

CDM250 User Manual

i

Table of Contents
List of Tables
Table 1: General Characteristics . . . . . . . . . . . . . . . . . . . . . . . .	11
Table 2: Physical Characteristics . . . . . . . . . . . . . . . . . . . . . . .	11
Table 3: Environmental Characteristics . . . . . . . . . . . . . . . . . .	11
Table 4: Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . .	12
Table 5: DC Volts Measurement Specifications . . . . . . . . . . . .	12
Table 6: AC Volts Measurement Specifications . . . . . . . . . . . .	13
Table 7: Direct Current Measurement Specifications . . . . . . . .	13
Table 8: Alternating Current Measurement Specifications . . . .	15
Table 9: Resistance Measurement Specifications . . . . . . . . . . .	16
Table 10: Standard Accessories . . . . . . . . . . . . . . . . . . . . . . . .	21
Table 11: Optional Accessories . . . . . . . . . . . . . . . . . . . . . . . .	21
Table 12: Accessory Power Cords . . . . . . . . . . . . . . . . . . . . . .	22

ii	CDM250 User Manual

General Safety Summary

Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it.

Injury Precautions

To avoid potential hazards, use the product only as specified.

Use Proper Power Cord

To avoid fire hazard, use only the power cord specified for this product.

Avoid Electric Overload

To avoid electric shock or fire hazard, do not apply a voltage to a terminal that is outside the range specified for that terminal.

Ground the Product

This product is grounded through the grounding conductor of the power cord. To avoid electric shock, the grounding conductor must be connected to earth ground. Before making connections to the input or output terminals of the product, ensure that the product is properly grounded.

Do Not Operate Without Covers

To avoid electric shock or fire hazard, do not operate this product with covers or panels removed.

Use Proper Fuse

To avoid fire hazard, use only the fuse type and rating specified for this product.

CDM250 User Manual

iii

General Safety Summary

Do Not Operate in Wet/Damp Conditions

To avoid electric shock, do not operate this product in wet or damp conditions.

Do Not Operate in Explosive Atmosphere

To avoid injury or fire hazard, do not operate this product in an explosive atmosphere.

Product Damage Precautions

Use Proper Voltage Setting

Before applying power, ensure that the line selector is in the proper position for the power source being used.

Provide Proper Ventilation

To prevent product overheating, provide proper ventilation.

Do Not Operate With Suspected Failures

If you suspect there is damage to this product, have it inspected by qualified service personnel.

Safety Terms and Symbols

Terms in This Manual

These terms may appear in this manual:

WARNING. Warning statements identify conditions or practices that could result in injury or loss of life.

iv	CDM250 User Manual

General Safety Summary

CAUTION. Caution statements identify conditions or practices that could result in damage to this product or other property.

Terms on the Product

These terms may appear on the product:

DANGER indicates an injury hazard immediately accessible as you read the marking.

WARNING indicates an injury hazard not immediately accessible as you read the marking.

CAUTION indicates a hazard to property including the product.

Symbols on the Product

The following symbols may appear on the product:

DANGER	Protective Ground	ATTENTION	Double
High Voltage	(Earth) Terminal	Refer to	Insulated
		Manual

Certifications and Compliances

CSA Certified Power Cords

CSA Certification includes the products and power cords appropriate for use in the North America power network. All other power cords supplied are approved for the country of use.

CDM250 User Manual

v

General Safety Summary

vi	CDM250 User Manual