Keithley 2100 User Manual

2100-900-01 Rev. D / September 2011 Return to Section Topics 4-19
Model 2100 6 1/2-Digit Resolution Digital Multimeter User’s Manual Section 4: Front Panel Operations
Reading hold
The reading hold feature is used to hold a stable reading on the display. When a reading is stable,
enabling the reading hold will hold the stable reading and trigger a beeping sound. The reading
hold feature depends on an adjustable sensitivity band to determine if a reading is stable. The
Model 2100 Digital Multimeter considers a reading stable when three consecutive readings are
within the sensitivity band. Refer to "Sensitivity band (hold)" for a description of how to adjust the
sensitivity band.
To enable the reading hold feature (this feature is only available from the front panel):
1. Press both the SHIFT and AUTO TRIGGER keys.
2. To disable reading hold, simply press AUTO TRIGGER (refer to Figure 4-14).
Figure 4-14
Reading hold
Trigger delay
This feature is useful if you need a longer delay time while the system is stabilizing. The time
needed to stabilize a measurement system is called the "settling time." The settling time depends
on the measurement range, cable properties, and signal source.
Trigger delay defaults
The default setting for trigger delay is automatically applied if you do not specify a delay value. The
Model 2100 will automatically select a delay time based on the measurement settings. A list of the
default settings for each measurement function is shown in
Table 4-3. The time range for trigger
delay is from 0 to 3,600 seconds. Your selection of delay time is stored in volatile memory; the
default delay time will be restored when the meter is turned-off.
The internal settings of automatic trigger delay
The delay time for automatic trigger delay is determined by the selected combination of
measurement function, range, integration time, and AC filter speed (refer to
Table 4-4 for default
measurement delay times).
Table 4-4
Default measurements
Measurement Setting Trigger delay time
DCV/DCI PLC > = 1 1.5ms
PLC < 1 1.0ms
 2 and  4
(PLC>
1)
100 ~ 100k 1.5ms
1M 15ms
10M ~ 100M 100ms
FILTER
NEXT
PREV
DIGITS
RATIO
%
MIN/MAX
NULL
ESC
ENTER
AUTO
SINGLE
TRIGGER
STORE
RECALL
LOCAL
SHIFT
CONFIG
MENU
AUT O
DCV
ACV
2
2
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
2
2
FUNCTION
DCI ACI
4
PERIOD
LIMITS MX+B
dB
EXTRIG
HOLD
MATH
TRIGGER MEMORY
dBm
RANGE
DISPLAY
NEXT
PREV
POWER
OFF
ON
SENSE
F
+
SHIFT
TRIGGER
AUTO

Keithley 2100 Specifications

General

Brand	Keithley
Model	2100
Category	Multimeter
Language	English