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P837 mA High Limit 
This  parameter  sets  the  highest  level  that  the  mA output  will rise  to,  the 
default  is  20 mA,  but  you  can  override  this  if  the  device  you  connect  to 
cannot for example accept more than 18 mA, yet you want to use the 0-20 
mA range. Default = 20.00mA 
Trim 
P838 mA Low Trim 
If the device  you are  connected  to  is  not  calibrated, and not  showing the 
correct low value (reading), then you can trim it using this parameter. You 
can  either  type  in  the  offset  directly,  or  use  the  arrow  keys  to  move  the 
output up and down until you get the expected result (reading) on the device 
that is connected. 
P839 mA High Trim 
If the device  you are  connected  to  is  not  calibrated, and not  showing the 
correct high value (reading), then you can trim it using this parameter. You 
can  either  type  in  the  offset  directly,  or  use  the  arrow  keys  to  move  the 
output up and down until you get the expected result (reading) on the device 
that is connected. 
Failsafe 
P840 mA Fail-safe Mode 
This parameter determines what happens to the mA output in the event of 
the  unit  going  into  fail-safe  mode.  The  default  is  to  do  the  same  as  the 
system fail-safe (P808), but this can be overridden to force the mA output 
to an independent fail-safe mode as follows: