Hi we need to check 100V PA sistem, have we to disconect the cables from the amplifier or only turn off th amplifier to do the measurement?

Yes. The output impedance of the amp will throw off your measurements. You should never try to measure line impedance with an amplifier connected, and if the amp is powered up still you will fry the meter.

Will this test a 70 volt paging horn?

Hi, This meter is to test audio impedance, not to test voltage, and the teste range is 20Ω/200Ω/2000Ω, I don't know the resistance of your 70 volt paging horn, please find it out. Anyway, I have upload the manual to listing page, you can check the manual for detail. Thank you!

Does it display reactance (capacitive and/or inductive)?

Inductive. However, it's cheaply made and the one I purchased had to go back. It only worked of you didn't tighten the screws on the battery cover.

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ALLOSUN - EM480B Audio Impedance Tester Digital LCD Insulation Resistance Megohmmeter Meter Tester with Bag

ALLOSUN - EM480B Audio Impedance Tester Digital LCD Insulation Resistance Megohmmeter Meter Tester with Bag

Product ID: 25408151

Details

Brand
allsun
Color
Black yellow
Item Weight
0.5 kg
Power Source
Battery
Style
Modern Digital

⚡Test voltage selectable: 250V/500V/1000V

📊Digital LCD with data hold & auto power off

🔋6x AA battery powered

126137CFA

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Description

⚡ Empower Your Diagnostics with Precision & Portability!

SAFETY FIRST - LED indicator confirms high voltage operation, keeping you informed and secure during every test.
BUILT TO LAST - Robust protection circuit guards against damage from discharge voltage, ensuring long-term reliability.
PORTABLE POWERHOUSE - Battery-powered with included carrying case and belt for ultimate on-the-go testing convenience.
SMART DATA HANDLING - Digital LCD display with data hold function ensures you never miss critical readings during inspections.
PRECISION VOLTAGE CONTROL - Easily switch between 250V, 500V, and 1000V test voltages with a simple rotary dial for versatile diagnostics.

The ALLOSUN EM480B is a digital insulation resistance megohmmeter designed for professional electrical testing. Powered by six AA batteries (not included), it offers selectable test voltages of 250V, 500V, and 1000V via a rotary switch. Featuring a clear digital LCD with data hold and auto power off, it comes with a protective circuit to prevent damage from discharge voltage. Packaged with a carrying case and belt, this compact 0.5 kg device ensures reliable, safe, and portable performance for field and industrial use.

Specifications

ASIN	B013QKIGU6
Best Sellers Rank	#132,236 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #21 in Insulation Resistance Meters
Brand Name	allsun
Color	Black, yellow
Customer Reviews	4.2 4.2 out of 5 stars (46)
Global Trade Identification Number	00788537553533
Included Components	Test Lead1 pair; English Manual; Belt1;Storage Bag*1;
Item Dimensions	6.69 x 2.56 x 4.33 inches
Item Weight	0.5 kg
Manufacturer	Zhangzhou Eastern Intelligent Meter Co., Ltd
Measurement Type	Ohmmeter
Minimum Operating Voltage	250 volts
Model	EM480B
Number of Items	1
Part Number	EM480B
Power Source	Battery Powered
Style Name	Modern Digital
UPC	788537553533
Unit Count	1 Count

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126137CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Senegal.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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