Keithley 6482, Справочное руководство

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17-8 Return to Section Topics 6482-901-01 Rev. A / August 2012
Section 17: Calibration Model 6482 Dual-Channel Picoammeter / Voltage Source Reference Manual
Voltage bias accuracy
Follow the steps below to verify that Model 6482 bias voltage accuracy is within specified limits.
This test involves setting the bias voltage to specific values and measuring the voltages with a
digital multimeter (DMM).
Figure 17-3
Connections for channel 1 bias voltage verification tests
1. With the power off, connect the digital multimeter to the Model 6482 channel 1 INPUT and
OUTPUT connectors, as shown in Figure 17-3 . Connect the DMM INPUT HI to the VOLTAGE
SOURCE OUTPUT CHANNEL 1 connector, and connect the DMM INPUT LO to the inner
shield (LO) of the INPUT CHANNEL 1 connector.
2. Turn on the Model 6482 and DMM, and allow them to warm up for at least one hour.
3. Restore bench defaults as outlined in Restoring factory defaults .
4. Select the multimeter DC volts measuring function, and then select autorange.
5. On the Model 6482, press the SCR1 key, and then select the 10 V bias range on channel 1 with
the RANGE key.
6. Set the channel 1 source voltage to +10.000 V as follows:
• Press the SRC1 key. Note that the EDIT indicator turns on, and a digit blinks in the
Src1:
display field to indicate the instrument is in the edit mode.
• Set the source value in one of two ways: (1) Enter the value using the numeric keys, or (2)
set the value using the EDIT keys. Use EDIT
and to place the cursor on the digit to be
changed, and use EDIT and to increment or decrement the value.
7. Press the OUTPUT key to turn on the output.
WARNING:
NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.
CAUTION:
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.
SERIAL NO.
120
LINE RATING
50, 60Hz
60 VA MAX
FUSE LINE
630 mAT
(SB)
315 mAT
(SB)
100 VAC
120 VAC
220 VAC
240 VAC
CAT I
MADE IN
U.S.A.
OUTPUT ENABLE
RS-232
TRIGGER LINK
INPUT
RATINGS MAX.
30 V @ 20mA
CHANNEL 1
CHANNEL 2
RATINGS MAX.
COMMON
MODE
200V
!
!
IEEE-488
(CHANGE IEEE ADDRESS
WITH FRONT PANEL MENU)
ANALOG
OUT
RATINGS MAX.
30 V @ 20mA
VOLTAGE
SOURCE
OUT
30 V @ 20mA
Model 6482
NEXT
PREV
POWER
DISPLA Y
2001 MULTIMETER
DCV ACV DCI ACI
Ω
2
Ω
4 FREQ TEMP
REL TRIG
INFO LOCAL EXIT ENTER
RANGE
RANGE
!
F R
500V
PEAK
FRONT/REAR
2A 250V
AMPS
CAL
STORE RECALL
CHAN SCAN
FILTER MATH
CONFIG MENU
HI
INPUT
LO
SENSE
Ω
4 WIRE
INPUTS
350V
PEAK
1100V
PEAK
AUTO
Model 2001 DMM
INPUT LO
(inner shield)
Channel 1
INPUT
INPUT LO INPUT HI
Triaxial
cable
Channel 1
OUTPUT