AMETEK SLH Series RevC - Manual (Page 37)

Sorensen SLH-Series DC High Power Electronic Load Operation
3.2 OPERATION – SETUP AND OCP/OPP TESTS
The SLH series DC loads can operate in 6 modes: Constant Current (CC), Constant Voltage
(CV), Constant Power (CP), Constant Resistance (CR), all selected with the MODE key, Shorts
mode, selected with the SHORT key, and Dynamic mode, selected with the DYN/STA key.
(Dynamic mode allows controlled current transitions between two states in CC or CP modes
only).
Note: For the remainder of this Section, the number within parentheses following a front panel
key name, refers to the labels in Figure 3-1.
3.2.1 Overview of Front Panel Operation
Limits must be set up before selecting a mode in which to operate. The LIMIT key (12) is
used to set the Go/No Go upper and lower limits for voltage, for current and for power. It is
also used to set the system configuration for V-sense control, for Load ON voltage and for
Load OFF voltage.
After setting up the initial LIMIT parameters (see Section 3.2.2), use the MODE key (3) to
enter CC, CR, CV, or CP mode and set up the applicable parameters in each mode. Use the
HIGH and LOW keys (16) to set the load level values for each mode. If programming values
in Dynamic (10) mode (again, for CC and CP modes only), the T
HIGH , T LOW (14), and RISE,
FALL (15) values must also be set.
Then, select the high or low programmed Load level by pressing the LEVEL key (9), and last,
press the LOAD key (8) to apply load to the input terminals.
3.2.2 Initial Setup (LIMIT Key)
Pass / Fail Limits, Go/No GO Limits
If pass/fail limits are not desired, skip this step. This step is to set the upper and lower limit
values within which the inputs must fall in order to pass (the NG register is set to 0 and the
NG LED (2) remains not lit). If the inputs fall outside those values, i.e., they are less than the
lower limit value or higher than the upper limit value, the test is a fail or No Go (the NG
register is set to 1 and the NG LED is lit).
Voltage:
Press the LIMIT key until its corresponding ON LED (8) is lit and the “V” LED (5) is lit.
The upper 5-character display shows the upper voltage limit; the lower 5-character
display shows the lower voltage limit. Use the larger × Ø increment/decrement arrows
to set the upper limit and the smaller
↑↓ increment/decrement arrows to set the lower
limit.
Current:
Press the LIMIT key until its corresponding ON LED is lit and the “A” LED (5) is lit. The
upper 5-character display shows the upper current limit; the lower 5-character display
shows the lower current limit. Use the larger × Ø increment/decrement arrows to set the
upper limit and the smaller
↑↓ increment/decrement arrows to set the lower limit.
M540074-01 Rev C 3-7