Thermo Scientific 420 Series, Operating And Maintenance Manual

Page: 16 / 66

The data transfer sequence is transmitted in the following format. X refers
to the numerical time, RPM and temperature.
(NUL)XX:XX(H)(SP)(SP)XXXRPM(SP)(SP)XX.XC(SP)(LF)(CR)(EOT)
NUL . . . . . . . . . . . . . . . . . . . . .Null character (0)
SP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Space
LF . . . . . . . . . . . . . . . . . . . . . . . . . . . .Line feed
CR . . . . . . . . . . . . . . . . . . . . . . . .Carriage return
EOT . . . . . . . . . . . . . . . . . . . . . . .End of text (4)
H . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Hold Mode
The SHKE420HP transmits time, RPM and temperature information one
minute after power is first applied to the unit, then every 60 minutes.
The shaker’s microprocessor responds to two ASCII commands from the
remote: DC1 (XON), and DC3 (XOFF)
DC1 (17, 11 Hexadecimal)
The shaker will transmit Time, Temperature and RPM data upon receiving
“DC1” (XON) and will restart 60 minute interval transmissions if they
have been inhibited by a “DC3” (XOFF).
DC3 (19, 13 Hexadecimal)
Receiving a “DC3” (XOFF) from the remote inhibits the shaker from
sending serial data indefinitely until a “DC1” (XON) is received.
Orbital Shaker 1-9 Thermo Scientific
Section 1
Installation
RS-232 Interface
Connector (cont.)