Dc Volts Calibration; Connections For Dc Volts And Ohms Calibration - Keithley 2015 Service Manual

2.
3.
4.

DC volts calibration

After the front panel short and open procedure, the unit will prompt you for the first DC volt-
age: +10V. Do the following:
1.
Figure 2-2

Connections for DC volts and ohms calibration

Model 2015
REM STEP SCAN CH1 CH2 CH3 CH4 CH5 CH6 CH7
TALK
LSTN
SRQ
SHIFT
TIMER HOLD TRIG FAST MED SLOW REL FILT AUTO ERR
dBm
MATH T H D dB CONT
Ω2 Ω4
SHIFT DCV ACV DCI ACI
HOLD
DELAY LIMITS ON/OFF TEST CAL
LOCAL
EX TRIG TRIG STORE RECALL FILTER REL
POWER
SAVE SETUP CONFIG HALT GPIB RS232
SOURCE MEAS STEP SCAN DIGITS RATE
THD
NOTE
2.
Press ENTER to start short-circuit calibration. While the unit is calibrating, it will
display:
CALIBRATING
When the unit is done calibrating, it will display the following prompt:
OPEN CIRCUIT
Remove the calibration short, and press ENTER. During this phase, the CALIBRAT-
ING message will be displayed.
Connect the calibrator to the Model 2015 as shown in Figure 2-2. Wait three minutes to
allow for thermal equilibrium before proceeding.
Sense HI
SENSE
Ω 4 WIRE INPUT
HI
CH8 CH9 CH10 MATH
REAR
4W
350V 1000V
BUFFER STAT !
PEAK PEAK
2015 THD MULTIMETER
LO
500V
PERIOD TCOUPL
PEAK
INPUTS
FREQ TEMP
RANGE
F R
AUTO
FRONT/REAR
3A 250V
AMPS
RANGE
EXIT ENTER
Sense LO
Although 4-wire connections are shown, the sense leads are connected and discon-
nected at various points in this procedure by turning calibrator external sense on or
off as appropriate. If your calibrator does not have provisions for turning external
sense on and off, disconnect the sense leads when external sensing is to be turned off,
and connect the sense leads when external sensing is to be turned on.
Set the calibrator to output DC volts, and turn external sense off.
Sense HI
Input
HI
Output
HI
Input Output
LO
LO
Sense LO
Note: Use shielded low-thermal cables to
minimize noise. Enable or disable
calibrator external sense as indicated
in procedure.
Calibration
DC Voltage Calibrator
2-9