Keithley 2015, Service Manual

Page: 58 / 158

Calibration 2-25
Front panel manufacturing calibration
1. Connect the low-thermal short to the rear panel input jacks, and select the rear inputs
with the INPUTS switch. Allow three minutes for thermal equilibrium.
2. Press in and hold the SOURCE key while turning on the power.
3. Press SHIFT then CAL, select RUN, then enter the appropriate calibration code (default:
002015).
4. Select ALL at the CAL:RUN prompt.
5. Press ENTER.
6. Perform the entire front panel comprehensive calibration procedure discussed earlier in
this section. (See Comprehensive calibration.)
7. Connect the synthesizer to the Model 2015 front panel INPUT jacks as shown in Figure
2-7. Select the front input jacks with the INPUTS switch.
Figure 2-7
Synthesizer connections for manufacturing calibration
8. After the last AC current calibration step, the instrument will prompt you to enter 3Hz at
1V RMS and 1kHz with the following prompts:
• Low-frequency cal: Set the synthesizer to output a 1V RMS, 3Hz sine wave. Use
the left and right arrow keys, and the range keys to adjust the display to agree with
the synthesizer amplitude you measured previously, then press ENTER.
• Frequency cal: Set the synthesizer to output a 1V RMS, 1kHz sine wave. Enter
1.000000kHz at the prompt, then press ENTER.
9. Set the calibration dates, then save calibration to complete the process.
Model 2015
2015 THD MULTIMETER
RANGE
!
F
500V
PEAK
FRONT/REAR
3A 250V
AMPS
HI
INPUT
LO
SENSE
Ω
4 WIRE
INPUTS
350V
PEAK
1000V
PEAK
AUTO
SHIFT
LOCAL
POWER
RANGE R
SHIFT
CH1 REM
TALK
LSTN
SRQ
STAT REL FILT
4W
BUFFER
MATH
REAR SCAN
TIMER
STEP CH2 CH3 CH4 CH5 CH6 CH7 CH8 CH9 CH10
HOLD TRIG FAST MED SLOW AUTO ERR
EXIT ENTER DIGITS RATE
REL FILTER TRIG EX TRIG STORE RECALL
SOURCE MEAS
DCV DCI
MATH T H D dBm
ACV
ACI
Ω
2
Ω
4 FREQ TEMP
dB CONT PERIOD TCOUPL
LIMITS ON/OFF DELAY HOLD
SAVE SETUP
CONFIG HALT
TEST
RS232
GPIB
CAL
STEP SCAN
BNC-to-Dual
Banana Plug
Adapter
50
Ω
BNC Coaxial Cable
Model 3930A or 3940 Synthesizer
Main
Function
Output
Note: Synthesizer output voltage
must be accurately measured.
(See text)
THD