Gamry Instruments EIS Box, Operator'S Manual, Page: 11 / 52

Safety Considerations
11
Temperature and Ventilation
Your EIS Box instrument was designed for indoor use at ambient temperatures between 0

C and 45

C.
The EIS Box uses forced-air cooling to keep the EIS Box components within their operating temperature range.
Most of the air needed to cool the EIS Box enters the chassis through holes in its bottom plate.
The fan within the EIS Box has two operating speeds with different audible noise levels. The EIS Box normally
operates with the slower, quieter fan setting. The fan switches to a higher speed when the
EIS Box’s internal
heat sink gets hotter than 50

C.
The cooling air exits through the back of the instrument.
Be careful when operating the EIS Box in an enclosed space (such as an enclosed relay rack or NEMA
enclosure). The temperature within the enclosure must not exceed 45

C. You may need to provide ventilation
holes or even forced air-cooling for the enclosed space if excessive temperature rise occurs.
Defects and Abnormal Stresses
Treat your EIS Box as potentially hazardous if any of the following is true of the unit:
•
It shows visible damage,
•
It does not operate properly,
•
It has been stored for a long period of time under unfavorable conditions,
• It has been dropped or subjected to severe transport stress,
• It has been subjected to environmental stress (corrosive atmosphere, fire, etc.).
Do not use your EIS Box or any other apparatus if you think it could be hazardous. Have it checked by qualified
service personnel.
Caution:
The surge suppressors can be irreparably damaged by non-transient voltages
that exceed their threshold voltage of
±
28 V. In the worst case this can cause catastrophic failure of the
system. Do not connect an EIS Box to a cell in a battery or fuel cell stack when the cell voltage is more than
25 V from earth ground.
Caution:
Do not block the airflow into or out of the EIS Box chassis. The circuitry is
thermally protected so over-temperature will cause the instrument to enter a shut-down state. If shut-down
occurs during data-acquisition, experimental data could be lost. Running the EIS Box without adequate
cooling could also shorten the time to failure of some of the circuitry.