1630 

Earth Ground Clamp 

6 

Accuracy Tests 

Accuracy specifications are valid for one year after calibration when measured at an operating 

temperature of 18 

°

C to 28 

°

C. Allow the UUT to stabilize at room temperature before 

performing the accuracy tests. 
To verify the accuracy of the UUT functions, complete the following steps: 

1.

Connect a 6-inch diameter loop of wire across the output terminals of the decade resistor 

box. 

2.

Turn the UUT rotary switch from 

OFF

 to 

O

 and verify the UUT displays CAL 7, 6, 

5

…

CAL 1 and a single beep is heard. 

3.

Set the decade box for the Applied Value in Table 3, steps 1-4, and clamp the UUT 

around the wire loop at the output terminals.  

4.

Compare the displayed reading with Display Reading Limits. 

5.

Continue accuracy tests for the other functions listed in Table 3. If any display readings 

fall outside of the Display Reading Limits in Table 3, the UUT requires calibration 

adjustment or repair. See 

Contacting Fluke

. 

Table 3. 1630 Accuracy Tests 

Step 

UUT 

Function 

Source Applied 

Value 

Display Reading 

Limits/Instruction 

1 

1 

Ω

0.935 to 1.065 

2 

9 

Ω

8.765 to 9.235 

3 

12 

Ω

11.52 to 12.48 

4 

90 

Ω

88.15 to 91.85 

5 

110 

Ω

105.7 to 114.3 

6 

200 

Ω

193.0 to 207.0 

7 

400 

Ω

375.0 to 425.0 

8 

600 

Ω

530.0 to 670.0 

9 

O

Decade Resistance Box 
and 6-in. diameter wire 
loop 

1100 

Ω

880.0 to 1320.0 

10 

0.3 mA, 60 Hz 

0.244 to 0.356 

11 

0.9 mA, 60 Hz 

0.832 to 0.968 

12 

1.1 mA, 60 Hz 

1.05 to 1.15 

13 

9 mA, 60 Hz 

8.79 to 9.21 

14 

11.0 mA, 60 Hz 

10.5 to 11.5 

15 

90 mA, 60 Hz 

87.9 to 92.1 

16 

110 mA, 60 Hz 

105 to 115 

17 

~ mA 

900 mA, 60 Hz 

879 to 921 

18 

0.3 A, 60 Hz 

0.264 to 0.336 

19 

3 A, 60 Hz 

2.910 to 3.090 

20 

Calibrator and 6-in. 
diameter wire loop 

4.2 A, 60 Hz 

4.09 to 4.31 

21 

~ A 

Calibrator and 3 turns of 
copper magnet wire, 
6-in. diameter 

10 A, 60 Hz 

29.37 to 30.63