The PSU firmware can be used to control its channels with various characteristics. For example, the voltage range could be set from 0 to 30 V, 0 to 40 V or 0 to 50 V, and the current range could vary from 0 to 3.12 A, 0 to 4.16 A or 0 to 5 A. It’s also possible to mix two channels with different voltage and current ranges e.g. 0 – 40 V/0 – 5 A and 0 – 50 V/0 – 3.12 A. Use the *IDN? command to find out what channels are defined in the PSU’s firmware.
8.1.1. Voltage
|
Programming range or model |
0 – 30 V |
EEZ PSU H24005 |
0 – 50 V |
|
MAXimum [V] |
30 |
40 |
50 |
|
MINimum [V] |
0 |
0 |
0 |
|
DEFault [V] |
0 |
0 |
0 |
|
Value after *RST or *TST? |
0 |
0 |
0 |
|
STEP MINimum [V] |
10m |
10m |
10m |
|
STEP MAXimum [V] |
5 |
5 |
5 |
|
STEP DEFault [V] |
100m |
100m |
100m |
|
PROTection DELay MINimum [s] |
0 |
0 |
0 |
|
PROTection DELay MAXimum [s] |
10 |
10 |
10 |
|
PROTection DELay DEFault [s] |
5m |
5m |
5m |
|
CALibration VALue MINimum[V] |
0.15 |
0.15 |
0.15 |
|
CALibration VALue MIDdle[V] |
14.1 |
19.1 |
24.1 |
|
CALibration VALue MAXimum[V] |
28 |
38 |
48 |
8.1.2. Current
|
Programming range or model |
0 – 3.12 A |
EEZ PSU H24005 |
|
MAXimum [A] |
3.12 |
5 |
|
MINimum [A] |
0 |
0 |
|
DEFault [A] |
0 |
0 |
|
Value after *RST or *TST? |
0 |
0 |
|
STEP and STEP MINimum [A] |
10m |
10m |
|
STEP MAXimum [A] |
1 |
1 |
|
STEP DEFault [A] |
50m |
50m |
|
PROTection DELay MINimum [s] |
0 |
0 |
|
PROTection DELay MAXimum [s] |
10 |
10 |
|
PROTection DELay DEFault [s] |
20m |
20m |
|
CALibration VALue MINimum[A] |
50m |
50m |
|
CALibration VALue MIDdle[A] |
1.525 |
2.425 |
|
CALibration VALue MAXimum[A] |
3 |
4.8 |
8.1.3. Power
The total number of possible combinations for the PSU’s power parameters is 6, of which two typical examples are given below:
|
Programming range or model |
0 – 50 V, 0 – 3.12 A |
EEZ PSU H24005 |
|
MINimum [W] |
0 |
0 |
|
DEFault [W] |
100 |
155 |
|
MAXimum [W] |
150 |
160 |
|
PROTection LEVel DEFault [W] |
100 |
155 |
|
PROTection DELay MINimum [s] |
1 |
1 |
|
PROTection DELay MAXimum [s] |
300 |
300 |
|
PROTection DELay DEFault [s] |
10 |
10 |
At power-on or after execution of the *RST common command, device settings will be set to the states listed in the following table. See also the MEMory:STATe:RECall:AUTO command.
|
Command |
Power on |
*RST |
|
*ESE |
0 |
Not affected |
|
*ESR |
0 |
Not affected |
|
*SRE |
0 |
Not affected |
|
*STB? |
0 |
??? |
|
CAL[:MODE] |
OFF |
|
|
CAL:STAT |
ON if valid calibrating data for both voltage and current exists in the non-volatile memory, otherwise OFF. |
|
|
DISP:BRIG |
Power down state |
20 |
|
DISP:VIEW |
Power down state |
1 |
|
DISP[:STAT] |
Power down state |
Not affected |
|
INST:NSEL |
1 |
|
|
INST:SEL |
CH1 |
|
|
MEMM:CDIR |
/ |
|
|
MEMM:DOWN:FNAM |
"" |
|
|
MMEM:LOCK |
Power down state |
Not affected |
|
OUTP[:STAT] |
Power down state |
OFF |
|
OUTP:PROT:COUP |
Power down state |
OFF |
|
OUTP:TRAC |
Power down state |
OFF |
|
SENS:CURR:RANG |
Power down state |
DEF (Best) |
|
SENS:CURR:RANG:AUTO |
Power down state |
ON |
|
SENS:DLOG:FUNC:CURR |
Power down state |
OFF |
|
SENS:DLOG:FUNC:POW |
Power down state |
OFF |
|
SENS:DLOG:FUNC:VOLT |
Power down state |
OFF |
|
SENS:DLOG:PER |
Power down state |
0.02 |
|
SENS:DLOG:TIME |
Power down state |
60 |
|
[SOUR[n]]:CURR |
Power down state |
DEF (see Section 8.1) |
|
[SOUR[n]]:CURR:PROT:DEL |
Power down state |
DEF (see Section 8.1) |
|
[SOUR[n]]:CURR:PROT:STAT |
Power down state |
OFF |
|
[SOUR[n]]:CURR:PROT:TRIP? |
0 |
|
|
[SOUR[n]]:CURR:STEP |
Power down state |
DEF (see Section 8.1) |
|
[SOUR[<n>]]:LRIP:AUTO |
Power down state |
Not affected |
|
[SOUR[n]]:POW:PROT[:LEV] |
Power down state |
DEF (see Section 8.1) |
|
[SOUR[n]]:POW:PROT:DEL |
Power down state |
DEF (see Section 8.1) |
|
[SOUR[n]]:POW:PROT:STAT |
Power down state |
ON |
|
[SOUR[n]]:POW:PROT:TRIP? |
0 |
|
|
[SOUR[n]]:VOLT |
Power down state |
DEF (see Section 8.1) |
|
[SOUR[<n>]]:VOLT:PROG[:SOUR] |
INT |
|
|
[SOUR[n]]:VOLT:PROT:DEL |
Power down state |
DEF (see Section 8.1) |
|
[SOUR[n]]:VOLT:PROT:STAT |
Power down state |
OFF |
|
[SOUR[n]]:VOLT:PROT:TRIP? |
0 |
|
|
[SOUR[n]]:VOLT:STEP |
Power down state |
DEF (see Section 8.1) |
|
[SOUR[<n>]]:VOLT:SENS[:SOUR] |
Power down state |
OFF |
|
STAT:OPER[:EVEN] |
0 |
Not affected |
|
STAT:OPER:COND |
0 |
Not affected |
|
STAT:OPER:ENAB |
0 |
Not affected |
|
STAT:OPER:INST[:EVEN] |
0 |
Not affected |
|
STAT:OPER:INST:COND |
0 |
Not affected |
|
STAT:OPER:INST:ENAB |
0 |
Not affected |
|
STAT:OPER:INST:ISUM[:EVEN] |
0 |
Not affected |
|
STAT:OPER:INST:ISUM:COND |
0 |
Not affected |
|
STAT:OPER:INST:ISUM:ENAB |
0 |
Not affected |
|
STAT:QUES[:EVEN] |
0 |
Not affected |
|
STAT:QUES:COND |
0 |
Not affected |
|
STAT:QUES:ENAB |
0 |
Not affected |
|
STAT:QUES:INST[:EVEN] |
0 |
Not affected |
|
STAT:QUES:INST:COND |
0 |
Not affected |
|
STAT:QUES:INST:ENAB |
0 |
Not affected |
|
STAT:QUES:INST:ISUM[:EVEN] |
0 |
Not affected |
|
STAT:QUES:INST:ISUM:COND |
0 |
Not affected |
|
STAT:OPER:INST:ISUM:ENAB |
0 |
Not affected |
|
SYST:CHAN:INFO:ONT:LAST? |
0 |
|
|
SYST:CHAN:INFO:ONT:TOT? |
Power down state |
Not affected |
|
SYST:CPU:INFO:ONT:LAST? |
0 |
|
|
SYST:CPU:INFO:ONT:TOT? |
Power down state |
Not affected |
|
SYST:ERR:COUN? |
0 |
|
|
SYST:POW |
Power down state |
ON |
|
SYST:TEMP:PROT [AUX] |
Power down state |
55 |
|
SYST:TEMP:PROT:DEL [AUX] |
Power down state |
30 |
|
SYST:TEMP:PROT:STAT [AUX] |
Power down state |
ON |
|
SYST:TEMP:PROT CH1|CH2 |
Power down state |
75 |
|
SYST:TEMP:PROT:DEL CH1|CH2 |
Power down state |
30 |
|
SYST:TEMP:PROT:STAT CH1|CH2 |
Power down state |
ON |
|
TRIG:DEL |
Power down state |
0 |
|
TRIG:SLOP |
Power down state |
POS |
|
TRIG:SOUR |
Power down state |
IMM |
|
TRIG:SOUR:DLOG |
Power down state |
IMM |
8.3. Special modes of operation
Operations will differ when tracking or any of coupling modes between channels have been selected. Please note that some of features must be disabled because they are impossible for the PSU hardware or its software. The following table shows how special modes of operation affects some features:
|
|
Calibration (CAL) |
Low ripple (LRIP, LRIP:AUTO) |
Remote sensing (VOLT:SENS) |
Voltage |
Tracking |
Coupling (INST:COUP:TRAC) |
|
TRACking |
Disabled |
|
|
Disabled |
|
Disabled |
|
Coupled in PARallel |
Disabled |
|
|
Disabled |
Disabled |
|
|
Coupled in SERies |
Disabled |
Disabled |
Disabled |
Disabled |
Disabled |
|
8.4. Default settings (in the distributed firmware)
|
Function |
State / Value |
SCPI command reference |
|
Over-current protection (OCP) |
OFF |
CURR:PROT:STAT |
|
Over-voltage protection (OVP) |
OFF |
VOLT:PROT:STAT |
|
Over-power protection (OPP) |
ON |
POW:PROT:STAT |
|
OPP trip level |
155.00 W |
POW:PROT:TRIP |
|
OPP delay |
10 s |
POW:PROT:DEL |
|
Channel Over-temperature protection (OTP) |
ON |
SYST:TEMP:PROT:STAT |
|
Channel OTP trip level |
75.00 oC |
SYST:TEMP:PROT:TRIP |
|
Channel OTP delay |
30 s |
SYST:TEMP:PROT:DEL |
|
AUX sensor OTP |
ON |
SYST:TEMP:PROT:STAT AUX |
|
AUX sensor OTP trip level |
50 oC |
SYST:TEMP:PROT:TRIP AUX |
|
AUX sensor OTP delay |
10 s |
SYST:TEMP:PROT:DEL AUX |
|
Shutdown when protection tripped |
OFF |
SYST:POW:PROT:TRIP |
|
Switch off all outputs when protection tripped |
OFF |
OUTP:PROT:COUP |
|
Low ripple mode |
OFF |
LRIP |
|
Remote voltage programming |
OFF |
VOLT:PROG |
|
Remote voltage sense |
OFF |
VOLT:SENS |
|
Coupling mode |
NONE |
INST:COUP:TRAC |
|
Tracking mode |
OFF |
OUTP:TRAC |
|
Calibration password |
eezpsu |
CAL:PASS:NEW |
|
System password |
Not defined |
SYST:PASS:NEW |
|
Communication mode |
Local |
SYST:LOC |
|
Front panel lock |
OFF |
SYST:KLOC |
|
Front panel display |
ON |
DISP:STAT |
|
Ethernet communication |
OFF |
SYST:COMM:ENAB 0, ETH |
|
Force disabling of all outputs on power up |
OFF |
SYST:PON:OUTP:DIS |
|
Beeper |
ON |
SYST:BEEP:STAT |
|
“Key pressed” click tone |
OFF |
SYST:BEEP:KEY:STAT |
|
Ethernet port communication |
5025 |
SYST:COMM:ETH:PORT |
|
Ethernet MAC |
74-69-69-2D-30-00 |
SYST:COMM:ETH:MAC |
|
Serial port communication |
OFF |
SYST:COMM:ENAB 0, SER |
|
Serial port speed |
9600 |
SYST:COMM:SER:BAUD |
|
Serial port parity bit |
NONE |
SYST:COMM:SER:PAR |
|
NTP service |
OFF |
SYST:COMM:ENAB 0, NTP |
|
NTP server |
europe.pool.ntp.org |
SYST:COMM:NTP |