Fluke 5128A, Руководство пользователя

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5128A
Operators Manual
38
Temperature Uniformity Verification
The temperature uniformity verification uses the temperature data collected when
measuring each of the set points in Table 11. It compares each of the 8
temperature probes against the average of the 8 probes. Temperature uniformity
at each of the 8 measurement points is defined as absolute maximum of Tx –
T_average, where x refers to one of the 8 probes. Each of the 8 probes must
read within ±0.12 °C of T_average.
Troubleshooting
See Table 12 for possible causes and solutions to common problems.
Table 12. Troubleshooting
Problem Possible Cause Solution
Check Desiccant
indicator is lit with
a non-saturated
desiccant
cartridge. Display
has the message
LO RH ERR.
Product setting is at a temperature
and/or humidity extreme relative to
the prior setting such that transition
times are longer than normal.
Monitor the Product to see that the
actual humidity is still dropping. If it is,
the
Check Desiccant indictor will
eventually turn off unless the Product
setting is beyond its specifications.
There may be condensation in the
chamber.
Monitor the Product to see that the
actual humidity is still dropping. If it is
not, there is likely condensation in the
chamber. Turn the Product off and
check for condensation. See
Remove
Condensation .
There is a leak in the system.
Check that the door is properly seated,
and tightened against the Product front
panel. Check that all ports are sealed
properly.
Check Water
indicator is lit with
the water at the
proper level.
Display has the
message HI RH
ERR.
Product setting is at a temperature
and/or humidity extreme relative to
the prior setting such that transition
times are longer than normal.
Monitor the Product to see that the
actual humidity is still moving up. If it is,
the
Check Water indictor will
eventually turn off unless the Product
setting is beyond its specifications.
There may be condensation in the
chamber.
Monitor the Product to see that the
actual humidity is still moving up. If it is
not, there is likely condensation in the
chamber. Turn the Product off and
check for condensation. See
Remove
Condensation .
There is a leak in the system.
Check that the door is properly seated,
and tightened against the Product front
panel. Check that all ports are sealed
properly.
Actual humidity is
much higher than
the set point. For
example, the set
point is 23
°
C,
45 % RH and the
Actual is 23
°
C
with RH staying
close to 80 %.
Water has condensed inside the
chamber.
Shut off power. Remove the door and
inner chamber (mixing insert) and look
for water inside the outer chamber,
mixing insert, door, and UUT. Wipe dry
with a clean paper towel and reinstall
the inner chamber and door.