Chandler Engineering AMETEK 7200, Инструкция по эксплуатации

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SECTION 5 – TROUBLESHOOTING GUIDE 5 - 1
Section 5 - Troubleshooting Guide
PROBLEM SOLUTION
Software is not recognizing
the instrument.
Close the CHA-Control software, turn off the instrument,
and restart the computer. Apply power to the instrument,
wait 30 seconds, and then start the software.
Check all cables to make sure that they are plugged in
completely.
Air Bath is not heating. Check the HI-LIMIT temperature controller on the oven’s
front panel, to see if a temperature limit has been reached,
causing the HI-LIMIT controller to turn off the heaters and
latch in the OFF state. Press the RESET key to resume
heating.
H
2
O Confining Pressure or
Gas Injection Pressure will
not increase to desired test
pressure.
Check to make sure that the necessary minimum nitrogen
Gas Supply Pressure is connected to the Gas Supply
Pressure bulkhead fitting on the back of the instrumentation
cabinet, and that the GAS SUPPLY VALVE is open.
During initial setup of the
test, and pressurization of
the cement, there is no
pressure communication
between the H
2
O Confining
Pressure and the Pore
Pressure (Pore Pressure is
not affected by H
2
O
Confining Pressure).
Check to see that the appropriate valves are opened.
Check for plugged tubing in the lines between the cell and
the valves, fittings, and accumulator in the instrumentation
cabinet.
Air underneath diaphragm, or improper filling and setup of
accumulator, allows accumulator to empty (run out of
stroke, with bladder at top, with no more water in
accumulator), so that increasing H
2
O Confining Pressure
can no longer increase the Pore Pressure. Solution: either
(1) discard cement sample, disassemble and refill lower
assembly (underneath diaphragm) with water, without any
air inclusion, and begin new test, or (2) disconnect H
2
O
Confining Pressure tube at cell and repeat initial filling and
setup of accumulator with water, except purge only 25 ml
of H
2
O from accumulator, to begin test with approx. 75 ml
of H
2
O (and 25 ml of N
2
) in the accumulator, to allow
injection of more H
2
O to pressurize the cement before
emptying the accumulator.
N
2
Flow Rate or H
2
O Flow
Rate will not reach 0.00
sccm, +/- 0.05 sccm, with
GAS INJECTION
VALVE and H
2
O
CONFINING VALVE
closed.
Check for gas leaks using soapy water (such as Chandler
Engineering part #55-400).