Gossen MetraWatt 62 N Series, Руководство по эксплуатации, Страница: 75 / 92

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ULIM, ULIM? – Voltage Setting Limit Value
Functions
ULIM defines the upper setting limit (soft-limit) for voltage setpoint
value USET.
This limit can be used to assure that output voltage is not
inadvertently set above a specified value.
Syntax
ULIM
value
Parameter
Value
Parameter type: real number
a) Manual Operation
See description on page 23.
b) Programming
Set
Setting command:
UL IM
value
Example (HP Basic):
OUTPUT 712;"ULIM 28"
!Voltage setting limit value: 28 V
Setting query
Query command:
UL IM ?
Response string:
ULIM
value
Parameter format value :
+nnn.nnn
Fixed response string length: 13 characters
Example (HP Basic):
OUTPUT 712;"ULIM?"
ENTER 712;A$
DISP A$
→
Display:
ULIM +028.000
Comment
If an attempt is made to set ULIM to a value lower than USET, 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).
The ULIM function does not effect the adjustment of USET by
means of a control signal via the analog interface. However, direct
monitoring of maximum output voltage can be configured with
overvoltage protection trigger value OVSET (
→
page 24 OVSET).
UMAX? – Maximum Measured Voltage Value
Functions
The UMAX function reads out the highest output voltage value
which was measured by the UOUT measuring function and saved
to Min-Max memory while the MINMAX function was set to ON.
Syntax
UMAX?
Measuring Range:
Voltage measuring range as per UOUT
If the measured voltage value has exceeded the upper measuring
range limit at least once with the MINMAX function set to ON,
“+OL” appears at the display for UMAX 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:
UMA X ?
Response string:
UMAX
value
Response parameter format value :
±nnn.nnn
Fixed response string length: 13 characters
Example (HP Basic):
OUTPUT 712;"UMAX?"
ENTER 712;A$
DISP A§
→
Display:
UMAX +030.450
Comment
→
page 67, MINMAX function
UMIN? – Minimum Measured Voltage Value
Functions
The UMIN function reads out the lowest output voltage value
which was measured by the UOUT measuring function and saved
to Min-Max memory while the MINMAX function was set to ON.
Syntax
UMIN?
Measuring Range:
Voltage measuring range as per UOUT
If the measured voltage value has fallen below the lower
measuring range limit at least once with the MINMAX function set
to ON, “–OL” appears at the display for UMAX 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:
UMI N ?
Response string:
UMIN
value
Response parameter format value :
±nnn.nnn
Fixed response string length: 13 characters
Example (HP Basic):
OUTPUT 712;"UMIN?"
ENTER 712;A$
DISP A§
→
Display:
UMIN -000.000
Comment
→
page 67, MINMAX function
Device
Type
Setting Range Step Size
Nom.
Voltage [V]
Min.
[V]
Max.
a)
[V]
a. However, ULIM cannot be set to a value of less than the momentary voltage
setpoint USET.
Remote
b)
[V]
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)
[V]
c. Can be selected by (repeatedly) pressing the <RESOLUTION> key. The
blinking decimal place at the display indicates the selected step size.
52
0.00 52.00
0.001 0.01/0.1/1.0
80
0.00 80.00
0.001 0.01/0.1/1.0
Default setting after RESET (*RST): Nominal
voltage