Ametek Amrel PLA 2U, Operation Manual

Page: 100 / 162

M470039-01 REV-F Page 99
MODE CP or MODE:POW
This comma nd sets Electronic Loa d to consta nt power mode.
MODe:RANGe
This comma nd sets the ra nge a fter the mode is set.
Pa ra meters: 0 – 3
i. low ra nge
ii. middle ra nge
iii. high ra nge
iv. ultra -ra nge
Exa mple:
“MODE:RES” – sets the Electronic Load in CR mode;
“MODE:RANG 2” – sets the Electronic Load in high range;
“MODE:RANG? CR” – queries the range for CR mode.
TRAN sient

Tra nsient Progra mming Function
This subsystem programs the transient functions of three tra nsient modes: CONT inous, PULS e, T OGG le. The input
levels ( TLEV el) a nd slew ra te ( SLEW ) a re progra mmed from the current, resista nce, power a nd volta ge subsystems.
TRAN [ :STAT e]
This command ena bles or disa bles the tra nsient or stepping function. The pa ra meter ON | 1 enables the function and OFF
| 0 disa bles it.
Pa ra meter: ON | 1, OFF | 0
Exa mple:
“TRAN ON” – enables the transient function
DUTY
This comma nd sets pulse duty cycle, a s a percenta ge of the tota l cycle, of continuous transient mode. If the Electronic
Loa d is opera ting in a nother mode, the duty cycle is stored until the Loa d cha nges to continuous mode.
Pa ra meter: 2 to 98; MIN; MAX Unit: %
Exa mple:
“CURR:DUTY 50” – sets a 50% duty cycle for transient current mode.
FREQ
This comma nd sets pulse frequency of continuous tra nsient mode in Hz. If the Electronic Loa d is opera ting in a nother
mode, the pulse frequency is stored until the Loa d cha nges to continuous mode.
Pa ra meter: 0.25 to 20000; MIN; MAX Unit: Hz
Exa mple:
“CURR:FREQ 1000” – sets a 1000Hz frequency for transient current mode.
SLEW
This comma nd sets the power sle w ra te for the a ctive mode. The progra mmed slew ra te is in effect for a ll cha nges except
INP:ON or OFF. The ha rdwa re implementa tion selects a slew ra te tha t is closest to the SLEW va lue. To determine the
a ctua l va lue, use the query SLEW?.
Pa ra meter: 0 to ma ximum va lue; MIN; MAX Unit: Depending on mode
Exa mple:
“SLEW 6”- sets the slew rate to 6.
TRAN:TWID
This command sets pulse width of pulse t ra nsient mode in millisecond. If the Ele ctronic Loa d is opera ting in a nother
mode, the pulse width is stored until the Loa d is powered cycle.
Pa ra meter: 0.05 to 10000 Unit: ms
Exa mple:
“TRAN:TWID 800” – sets the pulse width to 800 ms.
Query synta x:
“TRAN:TWID?”
Returned pa ra meter: Pulse width va lue in second.
STEP

Step Programming Functions
This subsystem progra ms the stepping functions for stepping mode. The number of loops, step va lues, and dwell t imes
a re progra mmed for a specified opera ting mode.