Spellman High Voltage Electronics Corporation One Commerce Park,
Valhalla, NY 10595, (914) 686-3600, Fax: (914) 686-2870
3.2.6
SELECTING THE OVERLOAD TRIP RESPONSE (‘C’)
When the 200-C488 detects that the power supply has exceeded one of the user-programmed limits, it may
respond by shutting off the high voltage output, also known as tripping. The user may select that the power
supply be tripped for a voltage overload, a current overload, either a voltage or current overload, or neither.
The syntax is:
‘C {numeric}’
where {numeric} is the ASCII byte for 0, 1, 2, or 3 and:
C0
Enable the overvoltage and overcurrent control to shut down the power supply upon
detection of an output voltage or current above their respective limit setting(s).
C1
Enable the overvoltage control to shut down the power supply upon detection of an
output voltage above the voltage limit setting only.
C2
Enable the overcurrent control to shut down the power supply upon detection of an output
current above the current limit setting only.
C3
Disable the overvoltage control and overcurrent control.
3.2.7
SELECTING THE OVERLOAD SERVICE REQUEST RESPONSE (‘N’)
Just as the 200-C488 may be made to shut off the output during an overload, it may be may to generate a
service request to the GPIB controller. The syntax is:
“N {numeric}’
where {numeric} is the ASCII byte for 0, 1, 2, or 3 and:
N0
Enable SQR in response to an overvoltage or overcurrent detection.
N1
Enable SQR in response to an overvoltage detection only.
N2
Enable SQR in response to an overcurrent detection only.
N3
Disable SQR in response to an overvoltage or overcurrent detection.
When an SRQ is received, the user should execute a serial poll of the unit, the status byte will be the result
of the serial poll. Please note that overload enabling/disabling and service request choices operate
independently of each other.
3.2.8
TRIGGERING METER READINGS OF THE OUTOPUT (‘T’)
The 200-C-488 has the capability to perform meter readings of the power supply output voltage and
current. The user may trigger a reading of the output voltage, current or both. The syntax is:
‘T {numeric}’
where {numeric} is the ASCII byte for 0,1 or 2 and:
T0
Triggers a measurement of the output voltage and current.
T1
Triggers a measurement of the output voltage only.
T2
Triggers a measurement of the output current only.
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