User Manual

Fuse Requirements

An AC input fuse is necessary when powering the instrument. The fuse is

located at the back of the instrument. In the event the fuse needs to be

replaced, make sure the AC input power cord is disconnected from the

instrument before replacing. Refer to the table below for the fuse

requirements with either 115 VAC or 230 VAC.

Before replacing fuse, disconnect AC input power cord first

to prevent electric shock.

Only use same rating of the fuse. Using a different rated

fuse may damage the instrument.

Table 2.1 – Fuse Requirements

Model

Fuse Specification (115 V)

Fuse Specification (230 V)

891

T 1 A, 250 V

T 500 mA, 250 V

Fuse Replacement

Follow the steps below to replace or check the fuse.

1. Locate the fuse box in the rear panel of the instrument, next to the

AC input receptacle.

2. Use a flat blade screwdriver and turn the fuse capsule counter-

clockwise. There is an internal spring that will push it out after

turning.

3. Pull out the glass tube fuse inside to check and replace as necessary.

4. Insert the fuse capsule in the same location and use the flat blade

screwdriver to turn clockwise.