Jamar RAC-100, Руководство пользователя

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Step 2 The Tap Test will determine if
the distance pulses being sent
from the MDS are getting to,
and being processed by, the
DMI. The Tap Test is per-
formed using the rotary switch
shown in figure 3.2. First make
sure you note the current po-
sition of the rotary switch (1, 2, 4, 8,16, 32 or 64), as you will have
to return the slot back to this same position after the test is com-
pleted.
Next, turn on the DMI. Press the C-HOLD key just like you were
beginning to measure. Using a small screwdriver, rotate the switch
between the Tap and Test positions four or five times. (Note that
when the switch is turned clockwise until it stops, it is at the Test
position.) The DMI should register. The count shown does not mat-
ter, just as long as the DMI did register a count. If it did count, the
cable from the MDS to the DMI and the instrument itself are OK.
If the DMI did not count, the problem is most likely a bad cable to
the DMI or the DMI itself is bad. If available, try another DMI and
repeat the Tap Test. If the second DMI doesn’t count, the problem
has to be the cable between the MDS and the DMI.
Once the test is complete, return the Rotary Switch to the previous
position.
If the previous steps do not correct the problem, contact us using the infor-
mation on page ii.
3-5
Chapter 3 — Calibration
Figure 3.2 – Tap Test