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GMC-I Messtechnik GmbH

OUTPUT, OUTPUT? – Switching the Power Output On and Off

OUTPUT / LED

Function

The power output can be activated and deactivated with the
OUTPUT function.

Activation:

OUTPUT ON:

Current and voltage values of “0” are specified initially for a period
of approximately 2 ms

with activated output

for the transition from

the “highly resistive” condition. The output is then adjusted to the
selected voltage and current setpoints.

Deactivation:

OUTPUT OFF:

The power output is deactivated and rendered highly resistive
with the OUTPUT OFF command. Differentiation must be made
as to whether the internal dynamic sink is on or off (setting
command: SINK on / SINK OFF).
However, the output terminals are not electrically enabled.

OUTPUT OFF with SINK ON

The setpoints for voltage and current are set to 0 V and 0 A. The
sink is activated for approximately 300 ms. The sink discharges
the output capacitors as far as possible. The sink is then switched
off and the output becomes highly resistive as a result.

OUTPUT OFF with SINK OFF

The setpoints for voltage and current are set to 0 V and 0 A. The
power output is deactivated and becomes highly resistive as a
result.
The output capacitors are discharged via the connected load
only. Output voltage is correspondingly reduced.

Setting Command

Syntax:

OUTPUT txt

Parameter txt:

OFF/ON

Default setting
or after RESET (*RST): OFF

Query Command

Syntax:

OUTPUT?

Sample response string:

OUTPUT ON

Parameters List

Comments

If the output is switched off by a trigger signal in the
“T_MODE OUT” operating mode, i.e. in the off state, the signal
has higher priority.
An OUTPUT ON command is not executed, and bit 4 is set in
event register B (OUTE).
“Err 073” also appears briefly at the display as a warning in the
event of manual operation.
Additional functions which may influence the status of the output
include:
– OTP, overtemperature protection

– OVP, overvoltage protection

– OCP with activated “OCP ON” parameter

– SEQUENCE function

– T_MODE function

– POWER_ON

– *RCL

OVP, OVP? – Overvoltage Protection

Menu, LEDs

Edit Formulation

Function

The OVP function (

ver

oltage

rotection) specifies how the

power output will respond if output voltage is equal to or exceeds
the selected OVSET value.
The OVP function is an overriding protective function and is
independent of the voltage and current regulators.
The OVP function protects connected power consumers against
continuous overvoltage, although higher voltage is required
intermittently. The function also makes it possible to activate
another device configuration in case of overvoltage.
Output voltage is compared with the OVSET value from the
OVP-DAC by an autonomous comparator.
The ensuing reaction is shown in the following table, and
execution can be delayed by means of OV_DELAY.
Where OV_DELAY = 0, the power output is switched off directly
by the OVP comparator.
Activation of the OVP function is indicated at the front panel by
means of the “OVP ON” LED.
If OVP has caused shutdown, this is additionally indicated by the
“OVP” LED.

Setting Command

Syntax:

OVP txt

Parameter txt:

OFF/ON/R01 ... R12/15

Default setting
or after RESET (*RST): ON

Query Command

Syntax:

OVP?

Sample response string:

OVP OFF

Parameters List

OV_DELAY, OV_DELAY? – Overvoltage Protection Triggering Delay

Function

Desired response delay for the OVP function is set with OV_DE-
LAY. Delay time is specified in seconds.
If output voltage drops to below the OVSET value before OV_DE-
LAY expires, the shutdown sequence is interrupted and restarted
the next time the threshold is exceeded.
Where OV_DELAY = 0, the OVP comparator switches the power
output off directly as well.

Setting Command

Syntax:

OV_DELAY w

Value range:



65,535

Default setting
or after RESET (*RST):

Query Command

Syntax:

OV_DELAY?

Sample response string:

OV_DELAY XX.XXX