User manual

Section 15: Calibration Series 3700 System Switch/Multimeter Reference Manual
15-4 3700S-901-01 Rev. C / July 2008
Manufacturer
Model
Description
Used for:
Uncertainty
Fluke
5700
Calibrator
All DCV, ACV, DCI, ACI,
and Resistance
See NOTE.
N/A
N/A
4-wire short
DCV, resistance zeros
N/A
Agilent
33220
A
Function
generator
For frequency factory cal
only
See NOTE.
NOTE Refer to the manufacturer's specifications to calculate the uncertainty,
which will vary for each test point.
Calibration
Calibration must be performed by remote control using Ethernet, GPIB, or USB
interfaces. No front panel calibration is available. Refer to System connections
(on page 2-10) for more information on communicating with the instrument.
"Factory calibration" refers to additional calibration steps that are only performed
once at the factory or when a unit has been repaired by replacing PC boards or
components of the boards. The remaining calibration steps can be performed as
needed.
The factory calibration steps are:
DC Cal Step 0: A/D MUX Offset, which is performed at the beginning prior
to other DC calibration steps
Frequency Cal step 17: 1V @ 10Hz and step 18: 1V @ 1kHz, which are
performed at the end of AC calibration
You can perform individual sections of calibration, but for the instrument to be
calibrated properly, all the steps of a section should be performed. For example,
DC Cal Step 1: 4-wire short should be done as well as Steps 2 through 5 to
properly calibrate DC volts. Other sections are resistance, DC current, AC volts,
and AC current. Calibration must be saved at the end in order for the adjustment
to be permanent.
Before performing a calibration, check the system date of the Series 3700. This
can be done by sending the following command:
print(os.date("%x"))
If the date is wrong, the date and time need to be reset using the following
command:
settime(os.time(year = yyyy, month = mm, day = dd, hour
=hh, min = mm, sec = ss))