User manual

GMC-I Messtechnik GmbH 67
function set to ON, “–OL” appears at the display for IMIN
and “–999999.” is entered to the data string. The Min-Max
memory value can be reset to the momentarily measured
value with MINMAX RST (for all 4 parameters at once).
a) Manual Operation
See description on page 28.
b) Programming
Measured value query
Query command: IMIN?
Response string: IMIN value
Response parameter format value: ±nnn.nnn
Fixed response string length: 13 characters
Example (HP Basic): OUTPUT 712;"IMIN?"
ENTER 712;A$
DISP A§
Display: IMIN -000.010
Comment
 page 67 MINMAX function
IOUT? – Querying the Momentary Current Value
Functions
The IOUT function triggers measurement of the momentary
current value. The measured value is acquired over a period of
40 ms in a continuous fashion.
Syntax
IOUT?
Measuring Range
a) Manual Operation
See description on page 24.
b) Programming
Measured value query
Query command: IOUT?
Response string: IOUT value
Response parameter format value: ±nnn.nnn
Fixed response string length: 13 characters
Example (HP Basic): OUTPUT 712;"IOUT?"
ENTER 712;A$
DISP A§
Display: IOUT +031.510
Comment
page 67 MINMAX function
ISET, ISET? – Current Setpoint
Functions
ISET defines the output current setpoint value.
Syntax
ISET value
Parameter
Value
Parameter type: real number
The standard display format is: “XX.XX”. The current display
format is automatically changed to “X.XXX” for values< 10.00 A
for 12.5 A models, and to “XXX.X” for values as of 100 A for 150 A
models (manual setting resolution is reduced to 0.2 A as well).
The displayed setpoint is rounded off to the display format. Thus if
the smallest step size has been selected, minor setpoint
adjustments made with the keys or the rotary knob may not be
visible at the display.
a) Manual Operation
See description on page 22.
b) Programming
Setting
Setting command: ISET value
Example (HP Basic): OUTPUT 712;"ISET 11.3"
!Current setpoint: 11.3 A
Setting query
Query command: ISET?
Response string: ISET value
Parameter format value: +nnn.nnn
Fixed response string length: 13 characters
Example (HP Basic): OUTPUT 712;"ISET?"
ENTER 712;A$
DISP A$
Display: ISET +011.300
Comments
If an attempt is made to set ISET to a value higher than ILIM,
the setting command is not executed and bit 1 is set in event
register B (limit error), as is bit 4 in the standard event register
(execution error).
MINMAX, MINMAX? – Min-Max Storage for Measured U and I
Values
Functions
The MINMAX function saves 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.
Syntax
MINMAX status
Parameter
Status
One of the following text parameters can be selected:
OFF
Storage of Min-Max values deactivated
ON
Device
Type
Measuring Range Resolution
Nom.
Current [A]
Min.
a)
[A]
a. Measured values which violate the measuring range lower limit are identified
at the display as “–OL”, and in the data string as “–999999.”.
Max.
b)
[A]
b. Measured val ues wh ich e xceed th e me asuring r ange u pper l imit a re
identified at the display as “+OL”, and in the data string as “+999999.”.
Remote
[mA]
Display
[mA]
12.5 –0.478 13.342 2 2 / 10
25 –0.960 26.685 5 5 / 10
50 –1.92 53.370 10 10
75 –2.880 80.060 10 10
100 –3.840 106.740 20 20 / 100
150 –5.760 160.120 20 20 / 100
Device
Type
Setting Range Step Size
Nom.
Current [A]
min.
[A]
max.
a)
[A]
a. However, ISET cannot be set to a value of greater than the momentary current limit value ILIM.
Remote
b)
[A]
b. If the selected value is not a whole number multiple of the step size, it is rounded off accordingly.
If necessary, the numeric value is rounded off once again for the 4-place digital display.
Manual
c)
[A]
c. Can be selected by (repeatedly) pressing the <RESOLUTION> key. The blinking decimal place at
the display indicates the selected step size.
12.5 0.00 12.50 0.003125 0.003125/0.0125/0.1
25 0.00 25.00 0.00625 0.00625/0.1/1.0
50 0.00 50.00 0.0125 0.0125/0.1/1.0
75 0.00 75.00 0.02 0.02/0.1/1.0
100 0.00 100.0 0.025 0.025/0.1/1.0
150 0.00 150.0 0.04 0.04/0.2/1.0
Default setting after RESET (*RST): 0.00 [A]