AEMC 6422 User Manual page 26

In multiple electrode systems, the 62% method electrode spacing may no longer
be applied directly. The distance of the auxiliary electrodes is now based on the
maximum grid distance (e.g. in a square, the diagonal; in a line, the total length).
A square having a side of 20 ft will have a diagonal of approximately 28 ft.
Max Grid Distance
10 ft
12 ft
14 ft
16 ft
18 ft
20 ft
30 ft
40 ft
50 ft
60 ft
80 ft
100 ft
120 ft
140 ft
160 ft
180 ft
200 ft
2.3.2 Terminals Definitions
By default, the instrument's terminals are defined as H, S, and E. To change
these to C, P, and X:
26
Multiple Electrode System
6 ft
8 ft
While turning ON the instrument, simultaneously press and
hold down the
terminal assignments will be changed to C, P, and X. These
assignments will be retained even when the instrument is
turned OFF.
Distance to Y
78 ft
87 ft
100 ft
105 ft
118 ft
124 ft
130 ft
136 ft
161 ft
186 ft
211 ft
230 ft
273 ft
310 ft
341 ft
372 ft
390 ft
434 ft
453 ft
and TEST buttons for >5 seconds. The
Ground Tester Models 6422/6424
Distance to Z
125 ft
140 ft
160 ft
170 ft
190 ft
200 ft
210 ft
220 ft
260 ft
300 ft
340 ft
370 ft
440 ft
500 ft
550 ft
600 ft
630 ft
700 ft
730 ft