to select the function LIGHT. - USM-25 Manual.pdf

– Use the right-hand rotary knob to switch the backlight on or off.

Important basic settings

Principles of operation

A

_Attention:

Select your units immediately when you start working with the USM 25 because if you change the unit, all current settings are deleted, and the basic setup is loaded again.

In order not to delete anything by accident, a safety prompt is displayed in the measurement line: Change unit?

– If you are sure that you want to change the unit, press the v key belonging to the function UNIT one more time.

The unit is now changed, the current data are deleted. – If you want to abort the process, press any other

key. The previous setting is kept in that case.

Setting the backlight

You can switch the backlight for the display on and off in the function LIGHT (function group LCD). Apart from this, you can also use a simple key combination to witch it on and off.

H_Note:

The operating time is reduced by 25 to 30 % with the backlight switched on in battery operation! You should therefore ensure that the light is always switched off when not needed.

Operation:

– Use E to change over to the third operating level. – Use u to select the function group LCD and then

use v to select the function LIGHT.

– Use the right-hand rotary knob to switch the backlight on or off.

Krautkramer USM 25 Issue 07, 07/2003 4-11

Principles of operation

Important basic settings Or:

– Press the two keys u + u on the left both at the same time in order to switch the backlight on and off:

Press both keys

H_Note:

The higher the ambient temperature, the lower you have to set the contrast.

With extremely intense sunlight, the screen display is inverted. You can now set the display using the contrast setting so that you will see the A-scan as well as all functions and values appearing white against a black background.

The screen inversion with high ambient temperatures is typical of LCD displays. The effect vanishes at normal temperatures and is no risk to the screen.

Principles of operation

Important basic settings Or:

– Press the two keys u + u on the left both at the same time in order to switch the backlight on and off:

Press both keys

H_Note:

The higher the ambient temperature, the lower you have to set the contrast.

The screen inversion with high ambient temperatures is typical of LCD displays. The effect vanishes at normal temperatures and is no risk to the screen.

Krautkramer USM 25 Issue 07, 07/2003 5-1

Operation

5

5-2 Issue 07, 07/2003 Krautkramer USM 25

Operation Overview of the functions

5.1 Overview of the functions

The functions of the USM 25 are combined to form function groups on two operating levels.

– Press the E key to change between the two operating levels.

– Press the u key to select the function group shown above it.

– Press the v key to select the function shown next to it. The setting of the selected function is carried out via the right-hand rotary knob.

The Gain function is always directly available via the left-hand rotary knob.

You can carry out important functions (switch on/off, dB-step, freeze, zoom and report printout) by pressing the special keys (ref. chapter 4).

You will also find an overview of the function groups and their functions on the fold-out page.

Each operating level contains five function groups.You will recognize your currently active operating level by the number on the separation line between the first and the second function group.

First operating level

Second operating level

Third operating level

H_Note:

If the instrument is equipped with the Data Logger option, a fourth operating level is added. For this, refer to the corresponding chapter Option Data Logger.