Verifying Resistance - Keithley 2015 Service Manual

1-14 Performance Verification

Verifying resistance

Check resistance by connecting accurate resistance values to the Model 2015 and verifying
that its resistance readings are within the specified limits.
CAUTION
Follow these steps to verify resistance accuracy:
1.
Figure 1-5
Connections for resistance verification (100 Ω -10M Ω ranges)
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
MATH T H D dBm dB CONT
Ω2 Ω4
SHIFT DCV ACV DCI ACI
DELAY HOLD 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
2.
3.
4.
5.
Do not apply more than 1100V peak between INPUT HI and LO or more
than 350V peak between SENSE HI and LO, or instrument damage could
occur .
Using shielded 4-wire connections, connect the Model 2015 INPUT and SENSE jacks
to the calibrator as shown in Figure 1-5.
Sense HI
SENSE
INPUT
Ω 4 WIRE
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
Set the calibrator for 4-wire resistance with external sense on.
Select the Model 2015 4-wire resistance function by pressing the Ω 4 key, then choose
the SLOW integration rate with the RATE key.
Set the Model 2015 for the 100 Ω range, and make sure the FILTER is on.
Recalculate reading limits based on actual calibrator resistance values.
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.
Resistance Calibrator