Toa ZM-104 Specifications
TOA Electronics, Inc.
IMPEDANCE METER
ZM-104
FEATURES
n
measures speaker line impedances
n
fully portable
n
easy operation
n
wide coverage: 5 - 100,000
n
reliable
n
compact and lightweight
Ω
SPECIFICATIONS
Reading Method
Measurement
Oscillation Frequency
Accuracy
Power Supply
Service Life, when
continuously used
Dimensions in in. (mm)
Weight (with batteries)
Standard Accessories 1 Carrying case
Range
Direct (indicated ohms on meter)
x
1 range 5-1,000
x
10 range: 50-10,000
x
100 range: 500-100,000
kHz ±10%
1
+10%
Four “AA” size (UM-3) batteries
(6 volts)
x 1 range...30 hrs.
x 10 range, 100 range...60 hrs.
4.53(115) W x 7.32(186) D
x 2.16(55) H
2.1
lbs.(960 gr)
1 set, Measuring leads
1 impedance-power chart
DESCRIPTION
The TOA Impedance Meter, ZM-104, has been designed
Ω
Ω
Ω
to measure impedances in the speaker lines in sound
systems. It is fully portable and is operated from internal batteries. This handy meter provides accurate direct readings
in the manner of a circuit meter, simply by disconnecting the
speaker line from the amplifier and connecting it to the
measuring leads.
The range selector switch allows selection of three ranges,
from five to one hundred thousand
selector switch is transferred, zero Ω adjustment is necessary
before operation.
Its accuracy is less than plus or minus ten percent on all
ranges. The ZM-104 requires one battery change only after
more than 30 hours of continuous use.
The ZM-104 is supplied with a convenient Impedance Output Chart.
The entire unit is sturdy, light and easy to carry. It weighs
a mere 2 pounds.
Ω.
Each time the range
TOA Electronics, Inc., 601
South San Francisco, California 94080
Telephone: (415) 588-2538
Fax: (415) 588-3349
Gateway Boulevard, Suite 300
Specifications are subject
to change without notice.
PRINTED IN U.S.A. 6-94-G
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