Fluke 8845A Calibration Manual page 44

8845A/8846A
Calibration Manual
Function
Ohms
Capacitance
(8846A only)
Current dc
Current ac
Cables
3-4
Table 3-1. Required Test Equipment (cont.)
Instrument Type
Standard Fluke 5520A
8½ digit meter Fluke 8508A
4-wire short Fluke low thermal 4-wire
short or equivalent
Alternate standard Fluke 5720A or equivalent
Alternate standard Fluke 8508A-7000K
resistor 1 Gohm resistor or
equivalent (better than
±0.35 % maximum
uncertainty)
Standard Fluke 5520A
1 nF, 10 nF, 100 nF, 1 μF,
Alternate
10 μF, 100 μF, 1 mF,
standards
10 mF, and 100 mF
standards
Standard Fluke 5520A
8½ digit meter Fluke 8508A
Alternate standard Fluke 5720A with Fluke
5725A
Standard Fluke 5520A
8½ digit meter Fluke 8508A
Alternate standard Fluke 5720A with Fluke
5725A
To reduce the possibility of inducing errors with ac signals picked up by the test
leads, use short, shielded twisted-pair PTFE-insulated test cables between the test
equipment and the Meter. Fluke makes a 2 foot (PN 738716) and 4 foot (PN 738724)
PTFE insulated test cable for this purpose.
Fluke USB to RS232 cable (PN 2675479) or Fluke IEEE 488 cable (2 meter, PN
708297)
Model
Must be characterized with 8508A
Used to characterize the 5520A
Fluke PN 2653346
Used for calibrating/verifying 1 GΩ
range in the 8846A when a 5520A
is not available.
TURS <4:1 at 1 nF, 10 nF, 100 μF,
1 mF, and 10 mF.
Standards must be ±0.25 % and
rated for at least 5 V
Must be characterized with 8508A
Only used to characterize the
5520A
Note: TUR <4 at 10 A
Must be characterized with 8508A
Only used to characterize the
5520A or 5720A
TUR at 1 A at 5 kHz < 4:1. Must
characterize with 8508A at 100 μA
at 5 kHz. 100 μA, 1 mA, 10 mA, 100
mA, 1 A and 2 A at 10 kHz.
Comments