|The Model ZM1 & ZM1P are unique test and measurement instruments that are useful to every sound contractor or installer.
The ZM1 measures the impedance of loudspeakers and entire distributed loudspeaker systems as well as individual components (resistors, capacitors, inductors). It will also calculate the wattage that will be produced on an installed loudspeaker system.
The ZM1P(shown here) has all the features of the ZM1 but adds an Overload Protection Circuit that prevents the meter from being damaged from amplifier output overloads up to 120VAC and a Tone Generator to improve system testing and performance.
These are rugged hand held battery powered instruments with special circuitry to prolong battery life. They come complete with high quality test leads.
Click here to read a review by Glen Ballou on the ZM1.
|Test Frequencies||100Hz, 330Hz, 1kHz, 10kHz|
|Voltage Ranges||25Vac - Some USA public schools and institutions|
|50Vac - International|
|70Vac - USA Industrial Standard|
|100Vac - International|
|Impedance Measurement Ranges||0 - 199.9 ohms|
|0 - 1999 ohms|
|0 - 19.99k ohms|
|Wattage Measurement Ranges||0 - 19.99 watts|
|0 - 199.9 watts|
|0 - 1999 watts|
|Accuracy (typical)||Impedance ± 3% / Wattage ± 2%|
|Connectors||All Models: Load / Output - Banana Jacks|
|Display||3½ Digit LCD with Battery Low Indicator|
|Test Tone||ZM1 - Not available|
|ZM1P - 400mv (-6dBu)|
|Power Requirements||ZM1 / ZM1P - Eight "AA" Alkaline Batteries.|
|Expected Battery Life||ZM1 / ZM1P - Impedance Mode - 35 hours continuous||ZM1 / ZM1P - Calculated Watts Mode - 23 hours continuous|
|Approvals: -||ZM1, ZM1P|
|Emissions: - EN 55022 B - FCC Class B|
|Immunity: - EN 55024 B|
|Size||ZM1 / ZM1P - (W x H x D) 3¼ x 8 x 2¼|
|Weight||ZM1 / ZM1P - 12 oz.|
|Case Material||ZM1 / ZM1P - High Impact ABS|
ZM Series Manual 119K unzipped.
ZM1 Article by Glen Ballou. 14.2K unzipped.
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