5.3 Problem with an external printer
756/831 KF Coulometer, Instructions of Use
109
5.3 Problem with an external printer
Problem Questions for remedial action
No characters can be
received on a connected
printer.
• Are the instruments switched on and cables plugged
in correctly?
• Is the printer set to ”on-line”?
• Are baud rate, data bit and parity the same on both
instruments?
• Is the handshake set properly?
If everything seems to be OK, try to print a report with
the key sequence <PRINT><SMPL DATA><ENTER>.
If this report is printed out correctly, check if reports are
defined in key <DEF>.
No data transmission and the
display of the Coulometer
shows an error message.
error 42: Transmission error. Is the printer set to "on-
line"? Is the connection cable properly wired?
The received characters are
garbled.
• Are the RS settings the same on both devices?
• Has the correct printer been selected?
• Data transfer has been interrupted on the hardware
side during the printout of a curve. Re-establish
connections and switch printer off/on.
Wrong line spacing.
The printer does not emulate completely the preset
mode. Usually these problems arise with the IBM mode.
Set the printer to a different mode (e.g. Epson).
Printout of titration curve is
not OK. Other reports are
printed OK.
Handshake is necessary for the printout of curves.
• Is your cable correctly wired? (The DTR of the printer
has to be connected to the CTS of the Coulometer.)
• Set "HWs" for the handshake of the Coulometer.
Configure the printer such that its DTR is set
(possibly with DIP switches).
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