VCIOM-05044
Page 46 of 75
DIgITal EPIC-2 TEChnICal Manual
InstallatIon and operatIng InstructIons
7.3.3.6 mA output calibration
From the Keypad/lCD menu system
(Figure 67), this has two additional items that
do not exist from the haRT DD. The Default
ma and Reverse ma are not really calibrating,
they only load factory default setting for the
ma output either as 4-20 ma or 20-4 ma.
The Custom ma is a real calibration which
allows the user to calibrate the (milliamp)
ma Output from the device. The user has the
option to calibrate the standard 4-20 ma (4 ma
for closed and 20 ma for open) or they can
reverse this or even use values other than 4 ma
and 20 ma.
• Default ma
The Default ma is not really a calibration
function; it is only a way to load factory default
settings for the ma output as 4-20 ma without
having to do a full Factory Default.
Refer to Figure 68
From ma Calib menu scroll to “Default ma”
and press EnTER. above is the first screen
to appear. This asks the user if they wish to
continue. The user has the option of selecting
“no” or “Yes” by using the Down arrow key to
switch. If “no”, it will terminate the Default
ma. If “Yes”, the factory default settings are
set to approximate a 4-20 ma current range.
FIguRE 68
Performing default ma calibration
FIguRE 69
Performing reverse ma calibration
FIguRE 67
accessing ma calibration
This is a very quick operation, so the above
screen will appear as 100% Done. Press
EnTER to exit. There is no potential failure
for this since it is just resetting some internal
default parameters.
• Reverse ma
The Reverse ma is not really a calibration
function, it is only a way to load factory default
settings for the ma output as 20-4 ma without
having to do a full Factory Default.
Refer to Figure 69
From ma Calib menu scroll to “Reverse ma”
and press EnTER. Below is the first screen
to appear. This asks the user if they wish to
continue. The user has the option of selecting
“no” or “Yes” by using the Down arrow key to
switch. If “no”, it will terminate the Reverse
ma. If “Yes”, the factory default settings are
set to approximate a 20-4 ma current range.
This is a very quick operation, so the above
screen will appear as 100% Done. Press
EnTER to exit. There is no potential failure
for this since it is just resetting some internal
default parameters.
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