Operating instructions

Language Dictionary

CURR[:LEVel] Channel-Specific Current Command/Query

Description

This is an implied keyword that specifies the value of the programmed current level and

whether that level is to be applied immediately or on occurrence of a trigger. If the

specified channel is in the CC (Constant-Current) Mode, an IMMediate current level is

transferred to the input as soon as the command is executed. A TRIGgered level is stored

and then transferred to the electronic load input when a trigger occurs. At that time, the

change to the input level occurs at the slew rate presently in effect. Following the trigger

event, subsequent triggers will not affect the input level unless the electronic load has been

sent another TRIGgered level command.

If the electronic load is not in the CC (Constant-Current) Mode when an IMMediate or

TRIGgered level command is sent, the programmed levels are saved for the time the

electronic load is placed in the CC mode. Triggered levels are processed by the Current

Subsystem even when the electronic load is not in the CC Mode. In this case, the

TRIGgered level becomes a stored IMMediate level that takes effect when the electronic

load is again in the CC Mode.

Note

Setting an IMM current level to the same value as the most recent TRIG current level will

not deactivate a pending TRIG level. You must use ABORt to deactivate it.

The present current level changes to the pending level on any of the following conditions:

■ On a TRIG[:IMM] command (always)

■ On receipt of an external trigger signal (if TRIG:SOUR is set to EXT)

■ On the next line voltage cycle (if TRIG:SOUR is set to LINE)

■ On receipt of *TRG (unless TRIG:SOUR is set to HOLD)

■ On receipt of a GPIB <GET> (if TRIG:SOUR is set to BUS)

■ On the next trigger timer pulse (if multiple electronic load is set to TRIG:SOUR

TIM)

The programmed current level (whether IMMediate or TRIGgered can be implicitly

changed with a RANGe command (See Chapter 3 - Introduction to Programming for

information concerning value coupling).

Command Syntax

CURRent[:LEVel][:IMMediate] <NRf+>

CURRent[:LEVel]:TRIGgered <NRf+>

Parameters

See Table 4-1 and the Operating Manual of the electronic load model.

Status and Errors

TRIGgered level commands affect the WTG bit in the Operation Condition register and

the OPC bit of the Standard Event Status Event register (See Chapter 5 - Status

Reporting). Programmed current levels outside the value range generate an error (See

Table 4-2 at the end of this chapter). The correct current range must be programmed

before the current level is programmed.

Value Coupling

If CURR:RANGe is set to a range that is below either type of LEVel, then that LEVel

will assume the MAX value of that range.