Temperature - Fluke 8508A User Manual

8508A
Users Manual
Lead Impedance - When making AC current measurements pay particular
attention to the lead impedance, especially lead capacitance at high
frequencies on the lower current ranges. (See "Measuring AC Voltage"
earlier in this chapter.)
Maximum Input Current capability and protection - The front input
terminals may be used to measure currents up to 20 A. The front input A
terminal protection is automatic and self-resetting, and does not interrupt
current flow. Damage is likely to occur if more than 20 A is applied.
The Rear input terminals may be used to measure currents up to 2 A only.
The rear input A terminal is protected by a fuse mounted on the rear panel.

Temperature

The 8508A provides a temperature readout by measuring the resistance of the connected
PRT or SPRT probe, and converting the resitance value to temperature. The multimeter
autoranges between the 200
the resistance value obtained at the temperature being measured.
Press the PRT key to show the PROBE # menu:
Select OK to ensure the probe indicated is selected.
PRT
PRT Configuration (Temperature Units, Resolution, Probe Configuration Management)
Press the
Units
Resl
PROBE
3-24
LoI range and the 2 k Normal
This function converts resistance measurements from a connected PRT to
temperature. This requires that the characteristics of the probe being used
are available for the conversion algorithm. The 8508A will store up to 100
sets of probe characteristics and the first menu encountered is used to select
from a scrollable list of entered probe identities.
Once selected, the stored probe characteristics are used to configure the
instrument hardware and implement the conversion of subsequent
measurements.
Temperature is displayed on the main left-hand display, and the measured
resistance value is also displayed on the right hand display.
key to see the
Config PRT CONFIG
PRT CONFIG Menu
Provides selection for temperature units.
Provides selection of the temperature resolution for subsequent readings.
This is the entry point to manage PRT probe information.
Note
Note
Probe# Menu
menu:
range depending on
OK
adj105f.eps
adj106f.eps