Gamry Instruments Reference 30k Booster, Operator'S Manual

Page: 32 / 55

Panel Indicators, Controls and Connectors – Front-panel Indicators
32
Cell On LED
This is a yellow LED, which lights when the system’s software turns on the Booster’s Cell Switch. When this
indicator is off, cell current will not flow through the Counter lead in the Booster’s cell cable.
Overload LED
This is a red LED, which lights when the Booster encounters an Overload condition. There are three possible
overload conditions:
• The control amplifier output current has exceeded its compliance limit of

30 A. In this condition, the
cell remains ON, and the output current is slightly higher than the limit. The desired control variable
(current or voltage) is not being reached.
• The control amplifier output voltage has exceeded its compliance limits of –2.5 V or +20 V. In this
condition, the cell remains ON, and the Counter lead generates a voltage slightly greater than the
compliance limit. The desired control variable (current or voltage) is not being reached.
• The current measurement circuit is measuring a current in excess of

30 A.
This indicator may light momentarily during AC experiments and when voltage steps are applied to capacitive
cells. Momentary
Overload indications generally do not imply a dangerous condition.
If the Overload indicator light goes on and stays on, this can indicate a dangerous condition, especially when
the cell cannot handle high power.
Over-Temp LED
This is a red LED, which lights when the Booster heat-sink exceeds a temperature threshold. There are two
temperature limits for the system:
• At the first, lower temperature threshold, the Over-Temp light goes on. The system does not shut
down.
• At the second, if the temperature reaches the higher limit, the system shuts down. In this state the cell
is turned off and power is removed from the system’s control amplifier.
The Over-Temp indicator should never light during normal operation of the system. Possible causes for an
Over-Temp condition include:
• Restricted airflow. The Booster needs 10 cm of airspace on all sides.
• An external environment above 40˚C, such as in a glove-box with inadequate cooling.
• A system failure, such as an inoperative cooling fan, a shorted transistor, or a damaged temperature
sensor.
Power LED
This is a Blue LED, which lights when the Booster has AC power (mains) connected and the rear panel power
switch is turned on. Experiments at currents less than 3 A can still be run when the Booster is properly
connected to a Reference 3000 potentiostat, even when it is not powered.
EMERGENCY SHUTDOWN LED
This is a red LED located near the EMERGENCY SHUTDOWN switch. It is off during normal system operation.
It lights when the EMERGENCY SHUTDOWN switch has been activated. It remains on until the switch is reset.