Ea Elektro Automatik EA Elektro-Automatik EA-ELR 9250-140 3U Electronic Load 0 - 140 A 0 - 250 Vdc 0 - 7000 W 33200406 データシート

Page 22

EA Elektro-Automatik GmbH

Helmholtzstr. 31-33 • 41747 Viersen

Germany

Fon: +49 2162 / 3785-0

Fax: +49 2162 / 16230

The HMI (

Human Machine Interface) consists of a display with touchscreen, two rotary knobs, a button and a 

USB-A port. 
1.9.6.1  Touchscreen display
The graphic touchscreen display is divided into a number of areas. The complete display is touch sensitive and 

can be operated by finger or stylus to control the equipment.
In normal operation the left hand side is used to show actual and set values and the right hand side to display 

status information:

Actual voltage display

Voltage set value input

Status area

Actual current display

Current set value input

Touch area for 

rotary knob assignment

Actual power display

Power set value input

Actual resistance value

Resistance set value input

Touch areas MENU 

and SETTINGS

Touch areas may be enabled or disabled:

  Black text or symbol = Enabled

  Grey text or symbol = Disabled

This applies to all touch areas on the main screen and all menu pages..

•

In normal operation the DC input values (large numbers) and set values (small numbers) for voltage, current and 

power are displayed. Resistance set value of the variable internal resistance is only displayed by active resistance 

mode. 
When the DC input is switched on, the actual regulation mode, 

CV, CC, CP or CR is displayed next to the cor-

responding actual values, as show in the figure above.
The set values can be adjusted with the rotary knobs next to the display screen or can be entered directly via the 

touchscreen. When adjusting with the knobs, pushing the knob will select the digit to be changed. Logically, the 

values are increased by clockwise turning and decreased by anti-clockwise turning.
General display and setting ranges:

Actual voltage

V

0-125% U

Nenn

Actual value of DC input voltage

Set value voltage 

(1

V

0-100% U

Nenn

Set value for limiting the DC input voltage

Actual current

A

0.1-125% I

Nenn

Actual value of DC input current

Set value current 

(1

A

0-100% I

Nenn

Set value for limiting the DC input current

Actual power

W

0-125% P

Nenn

Calculated actual value of input power, P = U * I

Set value power 

(1

W

0-100% P

Nenn

Set value for limiting DC input power

Actual resistance

Ω

0...99.999 Ω

Calculated actual internal resistance, R = U

IN

 / I

IN

Set value internal resistance

(1

Ω

x

(2

-100% R

Max

Set value for the target internal resistance

Adjustment limits

A, V, kW 0-102% nom

U-max, I-min etc., related to the physical values

Protection settings

A, V, kW 0-110% nom

OVP, OCP etc., related to the physical values

(1 

Valid also for values related to these physical units, such as OVD for voltage and UCD for current

(2