Fluke 189II/AN, Руководство по обслуживанию

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189II/AN
Service Manual
14
Reassembling the Meter Case
To reassemble the Meter case, do the following:
1.
Verify the rotary switch knob is in the

position (arrow on the rotary switch
detent points straight up to the LCD).
2. Install the display bezel, LCD, and top shield into the top case.
3. On the PCA, align the RSOB (Rotary Switch On-Board) housing so that the arrow is
in the same orientation as the rotary switch knob (arrow points straight up to the
LCD).
4. Place the PCA onto the top shield, making sure the RSOB alignment holes mate with
the rotary switch detent alignment studs.
5. Very carefully insert the LCD cable stiffener vertically into the mating PCA
connector.
6. Replace the bottom shield.
W
Caution
To avoid damage to the Meter, do not over-torque the six
Phillips-head screws when attaching the PCA and shields to the
case top. Use 5 to 7 inch-lb of torque.
7. Carefully replace the six Phillips-head screws that secure the PCA and shields to the
case top and input terminals.
8. Hold the Meter face down and place the case bottom onto the case top. Make sure the
LCD cable is not caught between the case halves.
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Caution
Do not over-torque the six Phillips-head case screws when
attaching the case bottom. Use 5 to 7 inch-lb of torque.
9. Reinstall the six case screws and the battery door.
10. Secure the battery door by turning the battery door fastener clockwise to the lock
position.
11. Go to the “Performance Test” section in this document, and perform the procedures
described.
Testing Fuses (F1 and F2)
Before measuring current, using Figure 2 as a reference, test the fuses by following the
instructions below.
XW
Warning
To avoid electrical shock or personal injury, remove the test
leads and any input signals before replacing the battery or
fuses. To prevent damage or injury, install ONLY specified
replacement fuses with the amperage, voltage, and speed
ratings shown in the specifications.
With the Meter in the Ω function, insert a test lead into the V/ Ω jack and place the probe
tip at the other end of the test lead against the metal at the top of the current input jack. If
the message “Leads Connected Incorrectly” should appear, the tip of the probe is inserted
too far into the jack and is activating the input alert. The resistance value should be
between 0.00 and 0.50 Ω for the A jack and 10.00 ±0.05 k Ω for the mA/
μ
A jack. If the
tests give readings other than those shown, have the Meter serviced.