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CX506a
MULTITESTER
CONTENTS

[1] SAFETY PRECAUTIONS:Before use, read the following safety precautions 025
1-1 Warning Instruction for safe use 025
1-2 Explanation of Warning Symbols 026
1-3 Overload Protections 026
1-4 Influence of the electromagnetic field 026
[2] APPLICATION AND FEATURES 027
2-1 Application 027
2-2 Features 027
[3] NAME OF FUNCTIONS 027
[4] SCALE READING 028
[5] DESCRIPTION OF FUNCTIONS 029
5-1 Selections, adjusters and switches 029
5-2 How to Use the Stand 029
[6] MEASUREMENT PROCEDURE 030
6-1 Start -up Inspection 030
6-2 How to select an appropriate range 030
(Selection of an appropriate range)
6-3 Preparation for Measurement 030
6-4 Voltage Measurement 032
6-4-1 DCV Measurement ( ) 032
6-4-2 ACV Measurement ( ) 033
6-5 DCA Measurement ( ) 034
6-6 Resistance Measurement 035
6-6-1 Resistance Measurement ( ) 035
6-6-2 Terminal to Terminal Current ( LI ) 036
6-7 Capacitance Measurement ( ) 037
6-7-1 C1,C2 Range 037
6-7-2 C3 Range 039
6-8 Transistor Measurement 040
6-8-1 ICEO Measurement 040
6-8-2 hFE Measurement 041
6-9 DC High Voltage measurement 042
6-10 End of Measurement 042
[7] MAINTENANCE 043
7-1 Maintenance and Inspection 043
7-2 Calibration 043
7-3 How to Replace Battery and Fuse 043
7-4 Cleaning and Storage 045
[8] AFTER-SALE SERVICE 045
8-1 Warranty and Provision 045
8-2 Repair 046
8-3 SANWA web site 046
[9] SPECIFICATIONS 047
9-1 General Specification 047
9-2 Optional Accessories 048
9-3 Measurement Range and Accuracy 048
C3

C3
[1] SAFETY PRECAUTIONS:Before use, read the following safety precautions

This instruction manual explains how to use your multitester
CX506a, safely.
Before use, please read this manual thoroughly. After reading it,
keep it together with the product for reference to it when necessary.
The instruction given under the heading WARNING CAUTION
must be followed to prevent accidental burn or electrical shock.

1-1 Warning Instruction for Safe Use
WARNING
To ensure that the meter is used safely, be sure to observe the
instruction when using the instrument.
Please be careful that the protection circuit may be undermined by
unjustifiable usage that does not follow the guidelines in the
instruction manual.

11. Never use the meter on the electric circuits that exceed 6kVA.
12. Pay special attention when measuring the voltage of AC 33
Vrms (46.7V peak) or DC 70V or more to avoid injury.
13. Never apply an input signals exceeding the maximum rating
input value.
14. Never use the meter for measuring the line connected with
equipment (i.e. motors) that generates induced or surge
voltage since it may exceed the maximum allowable voltage.
15. Never use the meter if the meter or test leads are damaged or
broken.
16. Never use uncased meter.
17. Be sure to use a fuse of the specified rating or type. Never use a
substitute of the fuse or never make a short circuit of the fuse.
18. Always keep your fingers behind the finger guards on the
probe when making measurements.
19. Be sure to disconnect the test pins from the circuit when
changing the function or range.
10. Before starting measurement, make sure that the function and
range are properly set in accordance with the measurement.
11. Never use the meter with wet hands or in a damp environment.
12. Never open rear case except when replacing batteries or fuse.
Do not attempt any alteration of original specifications.
13. To ensure safety and maintain accuracy, calibrate and check
the tester at least once a year.
14. Indoor use.

-- 25 --
1-2 Explanation of Warning Symbols
The meanings of the symbols used in this manual and attached to
the product are as follows.
: Very important instruction for safe use.
The warning messages are intended to prevent accidents to
operating personnel such as burn and electrical shock.
The caution messages are intended to prevent damage to the
instrument.
: DC : Diode
: AC : Ground
: Resistance : Plus
: Capacitance : Minus
hFE : DC Current Amplification Factor : Fuse
: Fuse & Diode Protection : Double insulation

1-3 Overload Protections
Functions Input terminals Maximum overload protection input (within 5s)
DCV 1000
DC AC 1000V or peak max 1400V
ACV 750
DCV 120 300 DC AC 750V or peak max 1100V
ACV 3/12/30 DC AC 200V or peak max 280V
DCV 120mV
DC AC 1mA DC AC 100V
30