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5 - Front Panel Operation
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5 - Programming the Output Relay (option 760 only)
Units with option 760 have isolation and polarity reversal relays connected to the output and sense
terminals. (Option 760 is not available on HP 6631B units.)
To control the relays independently of the Output On/Off switch, proceed as follows:
Action Display
1. On the Function keypad, press Output, and scroll through the Output
menu until you get to the RELAY command. The display indicates
whether the relay is presently closed (ON), or open (OFF).
RELAY ON
2. Use the ã and ä keys to select either ON to close the relay or OFF to
open the relay. Note that the output relays always open or close
whenever the Output On/Off key is pressed.
RELAY OFF
To control the polarity of the output relays, proceed as follows:
Action Display
1. On the Function keypad, press Output, and scroll through the Output
menu until you get to the REL:POL command. The display indicates the
present condition of the relay (either normal or reversed).
REL:POL NORM
2. Use the ã and ä keys to select either NORM or REV. NORMal causes
the relay polarity to be the same as the dc source output REVerse causes
the relay polarity to be opposite to that of the dc source output.
RELAY OFF
6 - Setting the HP-IB Address and RS-232 Parameters
Your dc source is shipped with the HP-IB address set to 5 This address can only be changed from
the front panel using the Address menu located under the Address key. This menu is also used to
select the RS-232 interface and specify RS-232 parameters such baud rate and parity.
Set the HP-IB address as follows:
Action Display
1. On the System keypad, press Address. ADDRESS 5
2. Enter the new address. For example, Press 7, Enter. ADDRESS 7
Configure the RS-232 interface as follows:
Action Display
1. On the System keypad, press Address. ADDRESS 5
2. Scroll through the Address menu by pressing q . The interface
command lets you select the RS-232 interface. The baudrate command
lets you select the baudrate. The parity command lets you select the
parity. The flow command selects the flow control options.
INTF RS232
BAUDRATE 9600
PARITY EVEN
XON-XOFF
3. The ã and ä keys let you select the command parameters.