HP 3457A - 5-65. DC Volts Offset Calibration - HP 44492 A; 5-64. Two-Wire Ohms Offset Calibration - HP 44492 A

3457A
Calibration
c, Remove the Wiring Block from the Strain Relief Housing (Figure 5-3, Step 3).
d. Install a copper shorting wire between the H and L inputs of channel 0. Tighten the two retaining
screws. (Refer to Figure 5-5 for wire connection).
e. Connect the prepared Wiring Block Assembly to the HP 44492A 10 Channel Multiplexer Assembly.
5-65. DC Volts Offset Calibration - HP 44492A
a. Select the DC Voltage function. (Press the DCV function key ).
b. Select the Scanner Input. (Press the TERM configuration key, enter the number 2 and press the ENT key ),
c.
Select
channel
0.
(Press
the
CHAN
configuration
key,
enter
the
number
0
and
press
the
ENT
key
).
d, Use the following procedure to calibrate the DC offset on the 300 V, 30 V, 3 V, 300 mV and
30 mV ranges beginning with the 300 V range.
1,
Set
the
3457A
to
the
appropriate
range.
(Use
the
{
or
|
scroll
keys
to
select
the
proper
range).
2. Access the Calibration Command. (Press the Blue SHIFT key, then the OFFSET COMP / C configura-
tion key). The display will show CAL.
3, Enter the value of the input - in this case 0, (NOTE: If the security feature has not been disabled (set to
0), it will be necessary to enter the input value, the delimiter (,) and the security code).
4. Press the ENT key. The display will show CALIBRATING while the calibration routine is
“ running.
e. Repeat steps "dl" through " d4" for each of the remaining ranges.
5-64. Two-Wire Ohms Offset Calibration - HP 44492A
a, Select the 2-Wire Ohms function, (Press the OHM function key ).
b.
Close
channel
0.
(Press
the
CHAN
configuration
key,
enter
the
number
0
and
press
the
ENT
key
).
c. Use the following procedure to calibrate the 2-wire ohm offset on the 30 Mohm, 3 Mohm,
300
Kohm,
30
Kohm,
3
Kohm
and
300
Ohm
ranges
beginning
with
the
30
Mohm
range.
1.
Set
the
3457A
to
the
appropriate
resistance
range.
(Use
the
t
or
i}
scroll
keys
to
select
the
proper
range).
2.
Access
the
Calibration
Command.
(Press
the
Blue
SHIFT
key,
then
the
OFFSET
COMP
/
C
con-
figuration
key
).
The
display will
show
CAL.
3.
Enter
the
value
of
the
input
-
in
this
case
0.
(NOTE:
If
the
security
feature
has
not
been
disabled
(set
to
0),
it
will be
necessary
to
enter
the
input
value,
the delimiter
(,
)
and
the security code).
4, Press the ENT key. The display will show CALIBRATING while the calibration routine is
running.
e
d.
Repeat
steps
"cl
"
through
"
c4
"
for
each
of
the
remaining
ranges.
5-19