Operating Instructions—
DM 5010
Table
2-2
FRONT
PANEL ERROR CODES
Displayed
Abnormal
Event
205
Execution
Errors:
Argument
out
of
range.
231
Not
in calibrate mode.
232
Beyond calibration capability.
303
Internal
Errors:
Math pack
error.
311
Converter
time-out.
317
Front panel time-out.
318
Bad calibration constant.
340
RAM error (high nibble).
341
RAM error (low nibble).
351
Calibration
checksum error.
372
ROM
placement error.
COOO
373
ROM
placement error.
D000
374
ROM
placement error.
E000
392
ROM checksum error.
COOO
393
ROM checksum error.
D000
394
ROM
checksum error.
E000
395
ROM
checksum error.
F000
General Operating Information
Allow
30 minutes
warmup time for operation to specified
accuracy. Over-range for the OHMS and
DIODE TEST func
tions
causes the instrument to display OC; for the
DCV,
ACV, and ACV + DCV
functions;
over-range is indicated by
a flashing display.
>
CAUTION <
Input
Connections
The HIGH,
LOW,
and GUARD connectors are used for
front-panel
measurements.
The connector
assembly con
tains
an internal switch connected between the LOW and
GUARD connectors.
This
switch is
closed until a test lead
probe
is inserted
into the GUARD connector; it remains
open until
the GUARD
test lead probe is removed.
Figure
2-4
illustrates three examples
of using
the front
panel
connectors to make measurements.
Method A is the
most commonly used.
It is used when common mode volt
age is not a consideration.
In this example, only the HIGH
and LOW connectors of the DM 5010 are used. Since a test
lead
probe
is not inserted into the GUARD connector, the
connector assembly internal
switch
is closed, shorting
the
LOW to the GUARD. This allows common mode current to
flow
through the LOW test
lead
and the power source
ground,
introducing some measurement
error.
Method B provides
the most
accurate measurements
when common mode voltages are
a problem. The DM
5010
GUARD connector is
connected to the source low terminal.
Common
mode current
flows through the GUARD
test lead
and
power source ground, not the measurement circuits.
In Method C, the DM5010 GUARD connects to the
source
ground. Some
measurement error may occur, since
common
mode current generated between the source low
and
power source ground flows in the measurement
circuit.
Observe
the specified
maximum
input voltage ratings.
Instrument
damage
may occur if the maximum input
voltage
ratings
are exceeded.
For all
measurement functions, range selection may be
either
auto-ranging
(AUTO button pressed) or a
fixed range
may
be selected using the STEP button. Refer to the range
indication
discussion
under Display Window.
DIODE TEST
uses only the
2 V range.
>
CAUTION <
With
the
instrument in the AUTO range mode, do not
repeatedly switch the input
voltage between a low val
ue (<200
mV
peak) and a higher value (>200 V
peak).
For
repeated measurements
alternating be
tween
voltage
extremes, use the STEP range mode to
select
an
appropriate higher range before increasing
the input
voltage. Failure to do so may temporarily
cause
inaccuracy in measurements
made using the
200 mV
range.
WANNING
|
To
help eliminate shock
hazard from voltages
mea
sured by the DM 5010:
1.
A void all contact with the voltage source if the
measured voltage exceeds 42.4
V peak.
2. Disconnect test probes from
the circuit-under-
test
before
disconnecting probes from the
DM5010,
or
before removing the DM5010
from the power module.
Rear-Interface
Measurements
If the REAR INPUT
button
is
pressed (illuminated),
sig
nals applied to the rear interface pins 28B (Hi) and 28A (Lo)
on the
ADC board (A17) are measured.
If the button is not
illuminated,
signals are measured via the front-panel input
connectors.
27
Summary of Contents for DM 5010
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Page 27: ...Operating Instructions DM 5010 2994 03 Fig 2 3 DM 5010 front panel controls and connectors 2 3...
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