USTER HVI SPECTRUM - Page 195

USTER
®
HVI SPECTRUM Instruction Manual
Uster Technologies, Inc. Chapter 14
Appendix • Page 14-9
Interaction between instrument and external computer
(transmission cycle):
• Host computer settings are: 4800, E, 7, 1.
• The HVI SPECTRUM instrument will send a start dataset record
(see record types below) before the first data record of a
sample.
• The HVI SPECTRUM instrument will send a stop dataset record
after testing for a particular sample is complete and all data
records for that sample have been sent and acknowledged.
• The HVI SPECTRUM instrument will expect to receive an ACK
(Ox06) upon good transmission of record.
• The HVI SPECTRUM instrument will expect to receive a NAK
(Ox15) upon bad transmission of record.
• The HVI SPECTRUM instrument will attempt three transmissions
while receiving a NAK. If there is transmission failure, proceed
to step g.
• The HVI SPECTRUM instrument will wait some time after
transmission for a signal from the external computer. The
amount of this time will be set in the status menu. After this time
has expired, this transmission cycle will fail; proceed to step g.
• Upon failure of the transmission response sequence, the HVI
SPECTRUM instrument will query the operator to either retransmit
or abort. Abort will cause control of the instrument to return to
the menu prior to sample testing.