HP 3478A Technical Manual page 21

3478A 3478A
1 1 Use the measurement key Use the measurement keys along the top row to se
the type of measurement you want to make. the type of measurement you want
2. 2. The 12 The 12 character character alphanumeric display alphanumeric display includes 12
dedicated annunciators. The display is read directly in dedicated annunciators. The display is read directly in
engineering units, i.e., MV for millivolts, MOHM for Meg- engineering units, i.e., MV for millivolts, MOHM for Meg-
ohm resistance, etc. ohm resistance, etc.
3. 3. If the blu If the blue key I e key Is pressed before s pressed before another key
function shown above that key is executed. function shown above that key is executed.
4. 4. These terminals These terminals are used are used for the
leads when making 4-wire ohms measurements. leads when making 4-wire
5. 5. These terminals are These terminals are the voltmet
input, 4-wire ohms source current terminals. input, 4-wire ohms source current terminals.
6. 6. This is the Amps input t This is the Amps input terminal and is used w
INPUT LOW terminal. 13 Amp INPUT LOW terminal. 13 Amp fuse protected)
7. 7. When this switch When this switch is out
terminals are selected. If the switch is in, the rear panel terminals are selected. If the switch is in, the rear panel
terminals are used. terminals are used.
s along the top row to select
to make.
includes 12
another key, the
for the voltmeter voltmeter sense
ohms measurements.
the voltmeter and 2 er and 2-wire ohms -wire ohms
erminal and is used with the
fuse protected)
is out, t , the fro he front nt panel panel input
Figure 3-1. 3478A Front Figure 3-1. 3478A Front and Rear Panel
lect 8. 8. These keys These keys are use
features features of the of the
selecting the "SHIFTED" functions of the bottom row of selecting the "SHIFTED" functions of the bottom row of
keys. keys.
The. lnternal Trigger The. lnternal Trigger is selected by this key. In this
mode, the 3478A triggers itself. mode, the 3478A triggers itself.
, the
Auto Auto r os ros is a function that allows you to enable or
ze ze
disable the internal zero correction circuitry. disable the internal zero correction circuitry.
sense
Pressing the Single Trigger Pressing the
take one reading and wait for the next trigger impulse. take one reading and wait for the next trigger impulse.
This impulse can come from either the Single Trigger This impulse can come from either the Single Trigger
key or the External Trigger input (rear panel BNC). key or the External Trigger input (rear panel BNC).
The Test/Reset The Test/Reset key performs an internal self test, then
ith the
resets the 3478A to its turn-on state. Any errors in the resets the 3478A to its turn-on state. Any errors in the
self test are noted in the display. self test are noted in the display.
input
The front panel The front panel SRQ
operation that enables you to manually interrupt the operation that enables you to manually interrupt the
controller. This key is enabled by setting the SRQ mask. controller. This key is enabled by setting the SRQ mask.
and Rear Panel Features
3-2 3-2
are used to d to select spe select special operat
3478A The blue shift 3478A The blue shift key allows
is selected by this key. In this
is a function that allows you to enable or
Single Trigger key causes the 3478A to key causes the 3478A to
key performs an internal self test, then
SRQ (Service Request) key is an HP-IB (Service Request) key is an HP-IB
Features
TM 11-6625-3071-14 TM 11-6625-3071-14
cial operating ing
key allows for for