Changing The Passcode 
You  can  set  the  passcode  to  any  number  from  0000  to  9999.  To  do  this, 
enter Program Mode and go to SyS1 (System) menu. Select P922 which is 
the Passcode parameter which can be changed as required. 
Resetting Factory Defaults 
If you need to restore parameters to their original factory settings, then enter 
Program Mode go to the SyS1 (System) menu and ENTER. Using the UP 
and  DOWN  buttons,  go  to  parameter  P930,  and  ENTER,  P930  is  the 
factory  defaults  parameter,  change  the  value  to  1  and  ENTER ,  all 
parameters,  with  the  exception  of  the  mA  trims,  will  be  restored  to  the 
factory  settings  (including  the  DATEM  trace)  and  on  completion  Stor 
(Store) will be displayed after which you can ESC out of this parameter and 
continue programming the IMP+
IMP+IMP+
IMP+ for the required application. 
Checking the Information Specific to your IMP+
IMP+IMP+
IMP+ 
There  are  some  parameters  dedicated  to  each  individual  IMP+
IMP+IMP+
IMP+,  such  as  the 
software revision and the units serial number. 
Checking the Software Revision and Serial Number  
If you need to identify the serial number of the unit or the current level of 
software in your  IMP+
IMP+IMP+
IMP+, whilst  in Run Mode press the ESC button and the 
serial  number  along  with  the  software  revision  will  be  displayed. 
Alternatively  enter  Program  Mode  and  select  SyS1  (System)  menu  and 
ENTER.  Select  parameter  P926  to  view  the  identity  of  the  current  
software revision or P928 for the serial number of the unit. 
Using the RS232 Serial Interface 
The RS232 serial interface is used to communicate between the IMP+
IMP+IMP+
IMP+, and a 
PC using the optinal Pulsar IMP PC software, this software is used to obtain 
information from the IMP+
IMP+IMP+
IMP+ so that echo traces can be viewed, parameters can 
be uploaded, downloaded and saved. 
To  do  so,  the  settings  for  communications  control  are  set  as  follows  and 
cannot be changed: baud rate 19,200, 8 data bits, no parity, 1 stop bits.  
Connection  between  the  IMP
IMPIMP
IMP+
++
+  and  the  PC  is  made  via  RJ11  connector 
located under the lid of the IMP+
IMP+IMP+
IMP+.