The following
operational tips are provided to help suggest methods of making
chamber performance more economical, or beneficial to our customers.
| •
|
The following
ideas will slightly alter chamber performance, but should help
reduce nitrogen consumption:
| • |
When
conducting a thermal ramp down, turn the heating event
off. |
| • |
When
conducting a thermal soak at low temperatures, turn the
heating event off. |
| • |
When
conducting a thermal ramp up, turn the cooling event off. |
| • |
When
conducting a long thermal soak at high temperatures with
live device under test, experiment with leaving the heat
event off. |
| • |
Use
multiple PID parameter sets to improve chamber performance
based on products being tested. |
|
| •
|
To help
reduce condensation on device under test, start the test profile
with a short period of time doing a dry air or gaseous nitrogen
purge of the chamber. |
| •
|
Adjust
controller's high and low temperature safety limits for each
test to reduce possibility of permanently damaging device under
test. |
| •
|
Calibrate
the controller and other related instrumentation regularly.
This service can be done by Chart by calling our customer service
group toll free 1-888-877-3093. |
| PROBLEM
|
POSSIBLE
CAUSE |
| Chamber
controller doesn't power up |
Main
disconnect not on.
Control power switch not on.
Ground fault interrupt tripped.
Controller circuit breaker tripped. |
Doors
won't open/close
(applies to Real-36 and Real-48) |
Doors
not closed far enough prior to turning switch.
Palm button pushed in.
Control power not on.
No air pressure to chamber.
Safety Mats Violated (If so equipped). |
| Fans
don't come on |
Doors
not closed.
Control power not on.
Fan Event not on.
Proximity switch(s) not engaged. |
| Chamber
cools but doesn't heat |
High
temp alarm activated.
Heat Event not on.
Controller internal limit exceeded. |
| Chamber
heats but doesn't cool |
Low
temp alarm activated.
Cooling Event not turned on.
Controller internal limit exceeded. |
| Chamber
doesn't heat or cool |
Control
power not on.
Fans not on.
Alarm condition exists.
Heating & Cooling events not on. |
| No
vibration in manual mode |
Vibration
Mode switch not in 'Manual' position.
Vibration Event not on.
No air supply to chamber.
Individual hammer air valves turned off.
Manual vibration set at zero.
Run button not set. |
For further
technical assistance, consult the supplied chamber manual, or call
our technical service team at (888) 877-3093.
