005 
3.  Press  and  hold  both  the    and    keys  on  instrument  faceplate 
simultaneously for 5 seconds. "Bump" will appear in the display indicating 
the instrument is now in the Set-up Mode. At this point the alarm relays* 
are disabled, audio  alarms* are disabled, and the current output* locks at 
3.0 mA for all gases except oxygen, which goes to 16.0 mA until set-up is 
complete.  If  no  buttons  are  pressed  within  a  3-minute  time  period,  the 
instrument reverts to normal operation.*** 
 
006 
4.  Pressing  the    key  will  advance  forward  through  the  various  options, 
while pressing the 
 
key will step backward. The internal keys act as 
 
or 
 
buttons (Page 9) to set the actual set-up values or parameters. 
A  flashing  decimal  point  on  the  lower  right  corner  of  the  display  will  appear  for  3  minutes  after  start-up, 
calibration, bump, or programming. This is an indicator that the 4-20 mA signal is locked at 3 mA and that all 
alarm functions are disabled. Once this flashing indicator clears all functions will return to normal.