Settings; Rem" Key; Comments On Handling; Rectification Of Faults - Promax FA-405 Manual

USER'S MANUAL FA-405

4.4.4 +%, -% settings

+% Under output off status, press +% key once, the LCD display will
indicate xxx (the multiple value in percentage on the established
voltage of the original storage data), now set the +% value by using
the knob and press ENTER key to save it. Afterward, when the
output is in the "ON" status, press +% key, the output will be
changed according to the saved multiple value in percentage.
-% Under output off status, press -% key once, the LCD display will
indicate xxx (the multiple value in percentage of the original storage
data), now set the -% value by using the knob and press ENTER
key to save it. Afterward, when the output is in the "ON" status,
press -% key, the output will be changed according to the saved
multiple value in percentage.
For example: Set the output voltage as 10.00V, the save value of +% is 105, and
the save value of -% is 95. The +% key is pressed, output voltage will
be changed to 10.00V × 1.05 = 10.50V, while the -% key is pressed,
output voltage will be changed to 10.00V × 0.95 = 9.50V. The output
voltage will be back to normal by pressing the normal key.

4.4.5 "REM" key

A serial RS-232 interface is incorporated on the rear of the case. With the
appropriate interface cable and optional software, communication with an IBM-
compatible PC is therefore possible. The interface is naturally via an optocoupler.
REM Clear the Remote Control mode and use panel control setting instead.
Thereupon, as with "LOCK", all operating elements (except POWER) are
locked against direct input.

4.5 Comments on handling

4.5.1 Rectification of faults

With the FA-405 power supply you have acquired a new generation measuring
instrument constructed to the latest technological standards. However, faults can occur.
Because of this, the following describes how some of these problems can be resolved
by the user relatively easily:
12/2003 Page 13