4 Protections
Over Temperature Protection
If the internal temperature of the power supply exceeds 85℃, the instrument will protect itself
by automatically turning power OFF. If this happens the buzzer will go off and the display will
indicate the following (OVER HEAT):
Figure 16 - Over Temperature Protection Warning
Over Voltage Protection (OVP)
The 9129B has over voltage protection function, which may be triggered due to an internal
error, wrong operation by the customer, or over voltage at the output terminals. Once the
power supply enters the protected OVP state, the user will hear a buzzer sound and the output
will be turned off. OVP will be triggered if voltage at the output is 0.1 V higher than the
maximum voltage set.
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