Extech 380400 Manual

Extech Ikke kategoriseret 380400

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User Manual

Resistance Decade Box

Model 380 0 40

Introduction

Congratulations on your purchase of the Extech 380400 Resistance Decade Box. This device

oers 7 decades of resistance ranges from 1 to over 11MOhms (in 1Ohm steps). Slide switches

allow easy addition and subtraction of resistance values. Binding posts (3) oer simp and le

secure connections. Careful use of this decade box will provide years of reliable service.

Specications

Resistance ranges 1 to 11,111,110 Ohms in 1 Ohm steps

Internal Resistance 0.3 Ohms

Power 0.3W Resistors

Connection Three (3) binding posts

Accuracy 1% Reading) + 0.3 Ohms ±(

Operating conditions Temperature: 32 to 122oF (0 to 50oC) / Humidity: 80%RH <

Dimensions/Weight 5.79 x 4.61 x 1.3" (14.7 x 11.7 x 3.3 Approx. 0.69 lbs. (312 cm) / g)

Operation

Binding Post Connections

The binding posts can be used for connections in several ways:

1. A banana plug can be inserted directly into the posts.

2. Bare wire can be threaded through the post after it has been unscrewed. Once the bare wire is threaded, tighten the posts as

necessary.

3. Alligator clips can be used but use caution not to strip the post threads or plastic post housing.

The resistance output is available on the RED and the BLACK binding posts. The WHITE post is case ground and is typically not

used. Connect the positive lead of the device under test to the RED post. Connect the negative lead to the BLACK post. Use the

WHITE grounding post only if the device under test will be grounded to the 380400 case.

Range Selection

The front panel switches are used to select the resistance that will be available on the RED and BLACK terminals. When a switch 28

is set to the IN position, the value printed above the switch is added to the total resistance available at the posts. When the switch is

set to OUT it is excluded from the total resistance. If all of the switches are set to OUT, the total output resistance zero (+ 0.3Ohms is

internal resistance approx.). –

For example, if the desired output value is 10.5KOhms, set the following switches to the IN position: 10K, 400Ohms and 100Ohms , .

Testing

This device can be used to verify the calibration integrity of MultiMeters, LCR meters, Calibrators, etc. Connect as described above in

the Binding Post Connection section. Set the resistance switches to output the desired resistance. Ensure that the voltage supplied

by the device under test does not overload the 0.3W internal resistor power rating. The device under test should read the value of

resistance selected on the tester. If it does not, the device under test may need calibration, adjustment, or repair.

www.extech.com

Produkt Specifikationer

Mærke:	Extech
Kategori:	Ikke kategoriseret
Model:	380400

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