Dc Volts Gain Calibration; Dc Volts Linearity Calibration - HP 3457A Service Manual

Cali bra tion 3457A
4. Press the ENT key. The display will show CALIBRATING while the calibration routine is
running.
d. Repeat steps
"
c l
"
through
"
c4
"
for each of the remaining voltage ranges.
e. Remove the short from the front panel HI and LO Input Terminals.
5-23. DC Volts Gain Calibration
-
Front Terminals
5-24. Equipment Required. A DC Voltage Source capable of providing 30 mV (*.0055%), 300 mV
(f .0012%), 3 V (*.0006%), 30 V (+.0013%) and 300 V (+.0017%) is required for the following procedure.
a. Set the HP 3457A t o the 300 volt range.
(Use the
f
scroll key to select the 300 V range).
b. Connect the Voltage Source t o the HP 3457A front panel HI and LO input terminals and set its
output t o 300 V.
c. Use the following steps t o calibrate the DC Voltage Gain on the 300 V, 30 V, 3 V, 300 mV and
30 mV ranges beginning with the 300 V range and ending on the 30 mV range.
1. Set the 3457A t o the appropriate voltage range.
(Use the
f
or
4
scroll key t o select the proper voltage
range).
2. Set the voltage source t o an output which will provide a full-scale reading on the HP 3457A.
3. Access the Calibration Command.
(Press the Blue S H I F T key, then the OFFSET C O M P
/
C configurn-
tion key).
The display will show CAL.
4. Enter the value of the input voltage (in volts).
(NOTE: If the security feature has not been disabled,
(set to 0 ) it will be necessary t o enter the input value, the delimiter
(
,
)
and the security code).
5. Press the ENT key. The display will show CALIBRATING while the calibration routine is
running.
d. Repeat steps
"
cl
"
through
"
c5
"
for each of the remaining voltage ranges.
e. Set the output of the Voltage Source t o 3 volts.
5-25. DC Volts Linearity Calibration
-
Front Terminals
5-26. Equipment Required. A DC Voltage Source capable of providing 3 V (4.0006°/o) is required t o
calibrate linearity of the DC Voltage Function.
a. Set the H P 3457A t o the 3 volt range.
b. Set the Voltage Source for an output voltage of 3 Vdc.
c. Reverse the leads at the 3457A input terminals t o provide a negative input voltage.
d. Access the Calibration Command.
(Press the Blue S H I F T key then the OFFSET C O M P
/
C configuration
key).
The display will will show CAL.