4-4 Amps Measurements
Step 5 Disable zero check and take a reading from the display
If the readings are noisy, you may want to use damping and/or filtering to reduce noise. Use
filtering if the noise is caused by a noisy input signal and use damping if noise is caused by input
capacitance. Filtering is covered in Section 6, and damping is discussed next.
Damping
High capacitance seen at the input will increase reading noise. This capacitance can be attrib-
uted to a long input cable or to the capacitance of the source, or a combination of both. Enabling
damping will reduce this type of noise for current measurements. However, damping will also
slow down the response of the measurement.
Perform the following steps to enable or disable damping:
1. Press DAMP to display the present state of damping.
2. Use the
or key to display ON or OFF.
3. Press ENTER.
RS232DIGITAL I/O
PREAMP OUT
250V PK
2V ANALOG
OUTPUT
COMMON CHASSIS
120
FUSE LINE
630mA
LINE RATING
50, 60Hz
60 VA MAX
T
(SB)
100 VAC
120 VAC
315mAT
(SB)
220 VAC
240 VAC
INPUT 250V PK
IEEE-488
(CHANGE IEEE ADDRESS
WITH FRONT PANEL MENU)
TRIGGER LINK
!
!
MADE IN
U.S.A.
V, GUARD
(PROGRAMMABLE)
OFF
ON
GUARD
(FOLLOWS
INPUT)
(INTERNAL)
INPUT PREAMP
10K
PREAMP
OUT
2V ANALOG
OUTPUT
COM
Black (LO)
Red (HI)
237-ALG-2
Cable
Metal Noise Shield
Metal Safety Shield
6514 Rear Panel
Safety
Earth
Ground
Green
(Chassis)
Figure 4-1
Connections for
amps
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