8.1. Programming parameters

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

8.2. Reset Settings (*RST)

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
programming (VOLT:PROG)

Tracking
control (OUTP:TRAC)

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