VCIOM-05044
Page 47 of 75
DIgITal EPIC-2 TEChnICal Manual
InstallatIon and operatIng InstructIons
• Custom ma Calibration
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. note, before proceeding,
make sure a milliamp meter is connected to
the current output for measurement.
Refer to Figure 70
From ma Calib menu scroll to “Custom 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 Custom
ma. If “Yes”, the Custom ma Calibration
will start.
FIguRE 71
Performing custom ma calibration
FIguRE 72
Finishing custom ma calibration
FIguRE 70
accessing custom ma calibration
as shown in Figure 71, the 4.00 will be flashing.
If something other than 4 ma is desired for
closed position, use the up/Down arrow keys to
select the desired output, then press EnTER.
next, under Meter, the up/down arrows will be
flashing. look at the reading on the milliamp
meter, then use the up/Down arrow keys
to adjust the output until the meter reading
matches the desired output. Once it matches
press EnTER to proceed. This calibration can
be aborted by simultaneously pressing both
the up/Down (Prev+next) keys.
On this next screen under Desired, the 20.00
will be flashing. If something other than 20 ma
is desired for open position, use the up/Down
arrow keys to select the desired output, then
press EnTER. next, under Meter, the up/down
arrows will be flashing. look at the reading
on the milliamp meter, then use the up/Down
arrow keys to adjust the output until the meter
reading matches the desired output. Once
it matches press EnTER to proceed. This
calibration can be aborted by simultaneously
pressing both the up/Down (Prev+next) keys.
Refer to Figure 72
at this point the ma Calibration is completed,
and the screen below appears. Press EnTER to
exit. If there is any failure (which there are not
many) such as ma Span Too Small, the failure
will be displayed.
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