Fluke 1653B - Page 37

1652C/1653B/1654B
Calibration Manual
28
5. Disconnect the shorting bar and connect test leads to the UUT L-PE-N input jacks.
6. Short the far end of the test leads together with a Zero Adapter (Fluke P/N 3301338)
See Figure 8.
7. Press and hold  for approximately three seconds until the UUT ZERO ∅
annunciator appears.
Perform the steps in Table 6 as follows:
1. Connect the test leads to the UUT and 5320A as shown in Figure 9.
2. Set the UUT rotary switch to LOOP Z
I
HI CURRENT function.
3. Use < to set L-PE (L-N).
4. On the 5320A, select Z
l
.
5. Using the 5320A Mode softkey select Line (Loop).
6. Using the 5320A Setup softkey, select Line Impedance (Loop Impedance) and then
select Line (Loop) imp. correction and COMP.
7. Using the 5320A cursor keys or keypad, set the 5320A Nominal R Value
(approximate) for the value from Table 6.
8. Record the 5320A Displayed OUTPUT impedance value.
9. Using the UUT accuracy spec. and the recorded 5320A Displayed Output impedance
value, calculate the Upper and Lower UUT display limits for Table 6 with the
formula that follows:
(Recorded 5320A Displayed OUTPUT Z Value) ±
{[(Recorded 5320A Displayed
OUTPUT Z Value) x %] + Counts}
10. Put the 5320A in OPER and wait to settle.
11. Press and release  and note the UUT display reading.
12. Compare the UUT display reading to the calculated UUT Display Limits in Table 6.
Table 6. Loop Z
I
Hi Current Accuracy Tests
Calculated UUT
Display Limits
Step
UUT
Function
UUT <
Setting
5320A
Nominal
R Value
5320A
Residual
Impedance
Correction
Type
Recorded
5320A
Displayed
Output
Z Value
UUT Accuracy
Spec.
±
(% + dig)
UUT
Res.
Lower Upper
1 0.1 Ω
2 1.8 Ω
3 18 Ω
± (2% + 4) 0.01 Ω
4 50 Ω
5 180 Ω
±2% 0.1 Ω
6 500 Ω
7
L-PE
1800 Ω
±6% 1 Ω
8 0.1 Ω
9 1.8 Ω
10 18 Ω
±(2% + 4) 0.01 Ω
11 50 Ω
12 180 Ω
±2 % 0.1 Ω
13 500 Ω
14
Loop Zi
Hi Current
L-N
1800 Ω
Comp
±6 % 1 Ω