Fluke 9100 User Handbook Manual page 245

10.4.7.2 Source Currents
The 9100 synthesizes resistance by sensing the current (I
and then driving its terminal voltage to a value given by the equation:
V = I x R, Where R is the output value set on the 9100 display.
terminals source
To cope with the wide range of source currents used by different UUTs, most of the
hardware configurations (spans of output resistance) associated with the Resistance
function have user-selectable 'UUTi Low' 'UUTi High' and 'UUTi Super' source current
operating modes.
These hardware configurations, and their corresponding ranges of UUTi source currents
used during normal operation of the 9100 are shown in Table 10.4.7.1. The 9100 is
switched between UUTi source currents by pressing the
Hardware Configuration Limits
on Span of Output Resistance UUTi Low
00.0000 to 40.0000 250 A to 3.5mA
040.001 to 400.000 25 A to 320 A
0.40001 k to 4.00000 k 25 A to 320 A
04.0001 k to 40.0000 k 2.5 A to 32 A
040.001 k to 400.000 k 250nA to 3.2 A
0.40001 M to 4.00000 M 25nA to 320nA
04.0001 M to 40.0000 M 8nA to 32nA
040.001 M to 400.000 M 4nA to 32nA
Table 10.4.7.1: Resistance Spans and Source Current Limits in Normal Operation
Output Voltage Limitation
The terminal voltage compliance in the Resistance function is limited to 10V. As a result,
if the product (I x R) is greater than 10V, the output will saturate and the apparent
source
output resistance will be less than the value indicated on the screen. Under these
conditions the following error message will be displayed:
======= WARNING =======
UUT sense current is high.
Internal circuits saturated.
Change current setting.
Section 10: Calibrating the Model 9100: Resistance Function
) flowing into its terminals,
source
CHANGE CURRENT screen key.
Constant Source Current Limits
UUTi High UUTi Super
2.5mA to 35mA 25mA to 350mA
250 A to 3.5mA 2.5mA to 35mA
250 A to 3.5mA 2.5mA to 35mA
25 A to 350 A 250 A to 3.5mA
2.5 A to 35 A 25 A to 350 A
250nA to 3.5 A 2.5 A to 35 A
25nA to 350nA 250nA to 3.5 A
25nA to 200nA N/A
Final Width = 215mm
10.4-37