4-42 Return to Section Topics 2100-900-01 Rev. D / September 2011
Section 4: Front Panel Operations Model 2100 6 1/2-Digit Resolution Digital Multimeter User’s Manual
WARNING Erroneous self-test failures may occur if the setting of power line voltage is
incorrect. Errors may also occur because of signals present on the input ter
-
minal (front and rear) during the self-test procedure. Long test leads can act
as an antenna causing pick-up of AC signals.
How to execute Self-test
You can execute a complete self-test by using the front panel operation. This test procedure
provides more tests for the hardware of the Model 2100 than the power-on tests. Refer to
Figure 4-
42 for assistance and follow the procedure below to perform the complete self-test.
Figure 4-42
Self-test procedure
Procedure: MENU SYSTEM SELF-TEST
After the self-test procedure, the result, PASS or FAIL, will display. If the result is FAIL, the “ERR”
annunciator on the display panel will be lit, and error codes will be stored. You can check the error
codes using the following procedure:
Procedure: MENU SYSTEM ERROR
601 Front panel does not respond: The main CPU U1601 attempts to establish serial
communications with the front panel processor U3. Communication must function in both
directions for this test to pass.
602 RAM read/write failed: This test writes and reads a 55h and AAh checker board pattern to
each address of ram U1701. Any incorrect read back will cause a test failure. This error is only
readable from the remote interface.
603 Front-End MCU does not respond: The main CPU U1601 attempts to establish serial
communications with the front-end processor U2001. Communication must function in both
directions for this test to pass.
604 A/D noisy test failed: This test configures to the 10V DC range with 111 the internal 0V. A
20ms ADC measurement is performed and the result is checked against a limit of 0V ±20uV.
605 N2 calibration parameter failed: This error message indicates that N2 calibration parameter
is out of range.
606 N3 calibration parameter failed: This error message indicates that N3 calibration parameter
is out of range.
607 Buffer1 offset out of range: This procedure is to test the offset of buffer U507. The result is
checked against a limit of 0 ± 0.1mV.
FILTER
NEXT
PREV
DIGITS
RATIO
%
MIN/MAX
NULL
ESC
ENTER
AUTO
SINGLE
TRIGGER
STORE
RECALL
LOCAL
SHIFT
CONFIG
MENU
AUT O
DCV
ACV
22
FREQ
CONT
TEMP
4 WIRE
RATIO
V
INPUT
PEAK
200V
PEAK
HI
LO
PEAK
500V
3A
RMS
INPUTS
3A 250V
FRONT/REAR
AMPS
R
1000V
REF
CAT 1000V
CAT 600V
LOCK
SETUP
ACV
22
FUNCTION
DCI ACI
4
PERIOD
LIMITS MX+B
dB
EXTRIG
HOLD
MATH
TRIGGER MEMORY
dBm
RANGE
DISPLAY
NEXT
PREV
POWER
OFF
ON
SENSE
F
NEXT
PREV
ENTER
MENU
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