Emerson NGA2000 - Installation

Instruction Manual
748275-F
September 2003
Rosemount Analytical Inc. A Division of Emerson Process Management Auto Calibration 3-3
Model NGA2000 I/O Modules
3-2 INSTALLATION
If this I/O Module is received as a separate
unit, carefully examine the shipping carton
and contents for sings of damage. Immedi-
ately notify the shipping carrier if the carton or
its contents are damaged. Retain the carton
and shipping material until all components are
operational.
To install this I/O Module, follow general in-
stallation guidelines in Section 1 and then do
the following:
Perform a hardware zero/span calibration
as follows:
1. Enter the Analog Output Parameters menu
by making selection in the following path:
Main Menu, Technical Level Configuration
Menu, Diagnostic Menu, [choose] Auto Cal
[module], Analog Output Module Menu and
I/O Module Analog Output Diagnostics
Menu. (See Figure 3-1 and refer to Section
3 of the Analyzer Module manual for fun-
damental menu structure help.)
2. To do both zero and span hardware calibra-
tions, the operator must use either the
Measured Output Voltage (or Measured
Output Current) values in either output cali-
bration menu or output values displayed by
a calibrated digital voltmeter or other sens-
ing device (e.g., a computer) connected to
the I/O output line
3. In the I/O Module Analog Output Diagnos-
tics Menu, choose Voltage Output Calibra-
tion or Current Output Calibration,
depending on output requirements.
4. Choose Test on the Set to Test for Calibra-
tion line.
5. If operator is doing a Voltage Output Cali-
bration, follow steps f through i. If the op-
erator is doing a Current Output Calibration,
follow steps j through m.
6. First do the zero calibration. Set the De-
sired Output Voltage to 0.
7. Observe the output value discussed in step
b.
8. Adjust, if necessary, the output value by
scrolling the Zero Offset until the output
value is 0.
9. Next, do the span calibration. Change the
Desired Output Voltage to 5, and scroll the
Gain Factor until the output value discussed
in step 1 is 5.
10. First do the zero calibration. Set the De-
sired Output Current to 0 (if 0 to 20 mA out-
put is desired) or 4 (if 4 to 20 mA output is
desired).
11. Observe the output value discussed in step
b.
12. Adjust, if necessary, the output value by
scrolling the Zero Offset until the output
value is the zero value (0 or 4).
13. Next do the span calibration. Change the
Desired Output Current to 20, and scroll the
Gain Factor until the output value discussed
in step 1 is 20.
After spanning the hardware, the operator
should recheck zero calibration values and re-
peat the procedure above if necessary.
Configure auto calibration parameters as
follows:
1. Enter the Auto Cal Module Menu by making
selections in the following path: Main
Menu, Expert Controls and Setup Menu,
Auxiliary Module Setup Menu, Auto Cal
[module]. (See Figure 3-1 and refer to Sec-
tion 3 of the Analyzer Module manual for
fundamental menu structure information.)
2. Set all parameters included in sub-menus of
the Auto Cal Module menu, as desired.
The Auto Calibration Module has the fol-
lowing functions:
• timed calibration