Simpson 270 Series 4

Analog - VOM

Volt-Ohm-Milliammeter

The Simpson 270 Series 4 comes standard with the mirrored dial.

 The Simpson 270-4 has the Taut Band Suspension and a mirrored dial to eliminate parallax errors.

The "M" designation is not used in the series number.

The 270 Series 4 has the three Amp-Clamp scales.

Controls include: Ohms zero adjustment, AC - DC Voltage selector switch,

and a 12 position Function / Range selector switch.

The off or "transit" position is at the 500 MA position on the function switch.

The back of the case has an "adapter lock" for use with "Add-A-Tester" accessories.

The rear case now has rubber feet instead of raised bumps at the four corners.

More inside views linked below.

This photograph shows the locations of the fuse and batteries in the back of the meter.

The 1 1/2 Volt "D" cell is used to power the R X 1 and R X 100 Ohms ranges.

The 9 Volt battery is used to power the R X 10,000 Ohms range and the overload circuits.

The batteries can be accessed through a removable cover on the back with a coin-slot screw.

Case Size: 5 " x 7 " x 3"  -  Weight: 3 Pounds

The Adjust-A-View handle can also support the meter in a sloping position for viewing.

Simpson 270-4 Specifications

DC VOLTAGE

Ranges 250mV, 1V, 2.5V, 10V, 50V, 250V, 500V, 1000V

AC VOLTAGE

Ranges 250mV, 1V, 2.5V, 10V, 25V, 50V, 250V, 500V, 1000V

Rated Circuit-To-Ground Voltage 1000V (AC or DC) max.

DECIBEL

5 Ranges -20 to +50dB * Reference 0dB= 1mW into 600Ω

DC CURRENT

Ranges 50μA, 1mA, 10mA, l00mA, 500mA, 10A

Voltage Drop: (Nominal) 250mV on 50μA , 1mA; 255mV on 10mA , 10A; 300mV on 100mA, 500mV on 500mA

RESISTANCE

Ranges Rx 1, Rx 100, Rx 10K

Maximum Indication 0-2KΩ, 0-200Ω, 0-20MΩ

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