Gossen MetraWatt P1500, Operating Instructions Manual

Page: 47 / 72

GMC-I Messtechnik GmbH 47
ISET, ISET? – Current Setpoint
SELECT B or rotary encoder Iset
Function
The output current setpoint is set with ISET. The ISET? query
returns the momentarily selected current setpoint as a response.
Values outside of the value range (0

IL_L

w

IL_H

Inom) are
not accepted, and cause generation of an error message and
setting of an error bit in event register ERC.2.
Entered numeric values are rounded off to device-specific
resolution.
Setting Command
Syntax:
ISET w
Value range: 0

IL_L

w

IL_H

Inom
Default setting
or after RESET (*RST): w
= 0
Query Command
Syntax:
ISET?
Sample response string:
ISET +XXX.XXX
MEASURE, MEASURE? – Measuring Function (not currently used)
Menu
MEAS_LPF, MEAS_LPF? – Low-Pass Filter for Measured Value
Acquisition
Menu
Function
Selection can be made from amongst four time constants for
evaluation of the measuring signal. This selection applies equally
to the measured quantities for both voltage and current.
Setting Command
Syntax:
MEAS_LPF n
Value range: n = 1, 2, 3, 4
Default setting
or after RESET (*RST): n
= 3
Query Command
Syntax:
MEAS_LPF?
Sample response string:
MEAS_LPF n
Parameters List
MINMAX, MINMAX? – Min-Max Storage for Measured U
and I Values
Menu
Function
The MINMAX function makes it possible to save minimum and
maximum measured voltage and current values to memory. The
saved values, UMIN, UMAX, IMIN and IMAX, can then be
displayed or queried via the interfaces.
The “MINMAX ON” setting is also a prerequisite for the “tolerance
band function”
(setting command
UI_C_SET w1,w2,w3,w4
for the reference
values).
Setting Command
Syntax:
MINMAX txt
Parameter txt: OFF/ON/RST
Default setting
or after RESET (*RST):
OFF
Query Command
Syntax:
MINMAX?
Sample response string:
MINMAX OFF
Parameters List
MODE? – Momentary Control Mode of the Power Output
LED
Function
The device responds with the momentarily active operating mode
(control mode) in response to the MODE? query command.
Query Command
Syntax:
MODE?
Sample response string:
MODE CV
Parameters List
Device
Type
Setting Range Setting Resolution
Nom.
Current [A]
Min.
[A]
Max.
[A]
Remote
[A]
Manual
[A]
60 0.000 60.000 0.001 0.001
120 0.000 120.000 0.002 0.002/0.010
180 0.000 180.00 0.003125 0.003125/0.0125
Param-
eter Content Meaning,
Time Constant
n
1 1 ms
2 10 ms
3 50 ms
4 400 ms
txt Description
OFF
Storage of Min-Max values deactivated,
stored values remain unchanged
ON
Storage of Min-Max values activated,
enables tolerance band function for CRB.0/1, ERC.0/1.
If the SIG outputs are correspondingly configured, a switching signal can
be generated at the analog interface.
RST
Contents of Min-Max memory are reset, i.e. are replaced with the
momentary measured value for the corresponding parameter:
Umin = Uout
Umax = Uout
Imin =
Iout
Imax = Iout
Param-
eter Content Meaning LED
txt
OFF
Output deactivated —
CV
Constant voltage regulating mode CV + OUTPUT
CC
Constant current regulating mode CC + OUTPUT
CP
Constant power regulating mode
Overload (power limiting) PLim + OUTPUT