Keithley SourceMeter 2400, Service Manual, Page: 33 / 137

2-5 Model 2400 Service Manual
Calibration
2400-902-01 (G - Feb 2006)
4. Once the correct password is displayed, press the ENTER key. If the password was cor-
rectly entered, the following message will be displayed.
CALIBRATION UNLOCKED
Calibration can now be executed
5. Press EXIT to return to normal display. Calibration will be unlocked and assume the
states summarized in Table 2-2. Attempts to change any of the settings listed below
with calibration unlocked will result in an error +510, “Not permitted with cal un-
locked.”
NOTE
With calibration unlocked, the sense function and range track the source function
and range. That is, when :SOUR:FUNC is set to VOLT, the :SENS:FUNC setting
will be ‘VOLT:DC’. When :SOUR:FUNC is set to CURR, the :SENS:FUNC setting
will be ‘CURR:DC’. A similar command coupling exists for :SOUR:VOLT:RANG/
:SENS:VOLT:RANG and SOUR:CURR:RANG/:SENS:CURR:RANG.
Table 2-2
Calibration unlocked states
Mode State Equivalent remote command
Concurrent Functions
Sense Function
Sense Volts NPLC
Sense Volts Range
Sense Current NPLC
Sense Current Range
Filter Count
Filter Control
Filter Averaging
Source V Mode
Volts Autorange
Source I Mode
Current Autorange
Autozero
Trigger Arm Count
Trigger Arm Source
Trigger Count
Trigger Source OFF
Source
1.0
Source V
1.0
Source I
10
REPEAT
ON
FIXED
OFF:SOUR
FIXED
OFF
ON
1
Immediate
1
Immediate :SENS:FUNC:CONC OFF
:SENS:FUNC <source_function>
:SENS:VOLT:NPLC 1.0
:SENS:VOLT:RANG <source_V_range>
:SENS:CURR:NPLC 1.0
:SENS:CURR:RANG <source_I_range>
:SENS:AVER:COUN 10
:SENS:AVER:TCON REPeat
:SENS:AVER:STAT ON
:SOUR:VOLT:MODE FIXED
:VOLT:RANGE:AUTO OFF
:SOUR:CURR:MODE FIXED
:SOUR:CURR:RANGE:AUTO OFF
:SYST:AZERO ON
:ARM:COUNT 1
:ARM:SOUR IMMediate
:TRIG:COUNT 1
:TRIG:SOUR IMMediate
Remote calibration password
To unlock calibration via remote, send the following command:
:CAL:PROT:CODE '<password>'
For example, the following command uses the default password:
:CAL:PROT:CODE 'KI002400'