B-2
BIT 4886 051010
B.2
NUMERICAL VALUES
The SCPI data parser on the BIT 4886 supports a maximum of 8 digits after the decimal point and a maximum
integer of 4 x 10
8
. Any values greater than these are not processed by the device and no error is generated.
The largest string that can be received or transmitted by the BIT 4886 is 253 characters.
All numerical data is returned in scientific notation, digits with decimal point and Exponent, e.g., 2.71E1 for 27.1
after calibration constants have been applied. Thus. for example, VOLT 14;VOLT? may return 1.39997E1
which indicates that the unit has been calibrated to provide 13.9997V for a programmed value of 14V, within
the calculation accuracy of the BIT 4886. Error “-120” results from syntactical errors, e.g., the exponent
exceeds 8, a letter is identified, etc. Error “-222” is produced if the value exceeds the range of acceptable val-
ues for the parameter.
B.3
CALibrate:CPRotect COMMAND
CAL:CPR
Syntax:
Short Form: CAL:CPR {MIN | MAX}
Long Form: CALibrate:CPRotect {MIN | MAX}
Description:
Selects Current Protection limit calibration, only effective with power supply in Calibrate sta-
tus.
CAL:CPR MAX selects maximum positive current protection limit calibration. CAL:CPR MIN
selects maximum negative current protection limit calibration.
Related Commands:
CAL:STAT,
CAL:ZERO, CAL:DATA, CAL:SAVE.
B.4
CALibrate:STATus COMMAND
CAL:STAT
Syntax:
Short Form: CAL:STAT <boolean>
Long Form: CALibrate:STATus <boolean>
where boolean = 0 or OFF, 1 or ON
Description:
Sets the power supply to Calibrate status.
<boolean> 1 or ON causes power supply to enter Cali-
brate status. <boolean> 0 or OFF causes power supply to exit Calibrate status. If the wrong password
was not enabled, error message -224 is posted to the queue.
Related Commands:
CAL:STAT,
CAL:VOLT, CAL:CURR, CAL:ZERO, CAL:DATA, CAL:DPOT, CAL:SAVE.
(See example, Figure B-1.)
B.5
CALibrate[:STATus]?
QUERY
CAL[:STAT]?
Syntax:
Short Form: CAL:STAT?
Long Form: CALibrate:STATus?
Return Value:
<DATA>
where DATA = ZERO-ZERO, VOLT-ZERO, VOLT-MAX, VOLT-MIN, CURR-ZERO, CURR-MAX,
CURR-MIN, or OFF.
Description:
Identifies whether the power supply is in Calibrate status and indicates which calibration step
is active.
OFF indicates power supply is not in Calibrate status. ZERO-ZERO indicates power supply
is at 0V, 0A, waiting for connection of load resistor. VOLT-ZERO indicates zero offset voltage adjust-
ment is active. VOLT-MAX indicates maximum voltage adjustment is active. VOLT-MIN indicates mini-
mum (negative) voltage adjustment is active. CURR-ZERO indicates zero offset current adjustment is
active. CURR-MAX indicates maximum current adjustment is active. CURR-MIN indicates minimum
(negative) current adjustment is active.
Related Commands:
CAL:STAT, CAL:VOLT, CAL:CURR,
CAL:ZERO, CAL:DATA, CAL:DPOT, CAL:SAVE. (See example, Figure B-1.)
