SECTION 7: CONNECTORS, APPLICATIONS & PROTECTION FEATURES
Entire Contents Copyright
2014 by Adaptive Power Systems, Inc. (APS) • All Rights Reserved • No reproduction without written authorization from APS.
42L Series Modular DC Load Operation Manual
Page 37 of 88
6.2
User Controls and Readouts
The following user controls, indicator and displays are common to all 42L Series load
models. The purpose and function of each control and indicator is explained in the table
below. Refer to figure for the location of each control and indicator.
1.
Model Number and
ranges
2.
Go/NoGo indicator
illuminates if upper or
lower limit settings are
exceeded.
3.
Operating Mode
Indicators
4.
REMOTE state indicator
5.
Multi-purpose 5 digit
display - Voltage
6.
Multi-purpose 5 digit
display - Current
7.
Multi-purpose 5 digit
display - Power
8.
CHAN A or B Control
Selection
9.
MODE toggle buttons
10.
LOAD ON/OFF button
and indicator
11.
DYNAMIC mode button
and indicator
12.
High or Low Range
Selection
13.
High or Low Load Setting
Selection
14.
Preset Mode ON/OFF
15.
Limit Setup Menu
16.
DYNAMIC mode settings
17.
Configuration Menu
18.
Short Circuit Test key and
indicator
19.
OCP (Over Current
Protection) Test key
20.
OPP (Over Power
Protection) Test key
21.
SHORT, OCP & OPP
Start/Stop
22.
Shuttle Knob, parameter
selection, slew and cursor
keys
23.
DC Input Terminals
24.
Voltage Sense Terminals
25.
Module Pull-Out Lever
Figure 6-2: Front Panel User Controls and Indicators
The various controls and indicators are explained in more detail in the table below. The Item
numbers correspond to the indices in Figure above.
KEY# Description
1
Indicates the
model number
and key performance specifications of the load.
2
Go/NoGo
indicator illuminates if upper or lower limit settings are exceeded.
3
There are four operating modes can be selected by pressing the "MODE" key on the electronic load
The sequence is Constant Current ( CC ), Constant Resistance ( CR ), Constant Voltage ( CV ),
Constant Power ( CP ) and then repeats. When pressing the "MODE" key, the CC, CR, CV, CP mode
indicator will be lit respectively when the appropriate operating mode is selected.
The operating theorem of CC, CR, CV and CP mode is described in Section 3.2, “Operating Modes”.
There are two programming ranges in CC, CR, CV and CP mode respectively; the 42L Series load can
adjust to the optimal range automatically according to the programmed load level. The range
selection criteria are described below for each operating mode.
