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Calibration
Calibration Procedure for ND-6018 Firmware Rev B1.10
1. Disable all the channel and open detect function
2. Select the correct input range, different input range have
different apply calibration voltage.
3.
Apply the correct
offset voltage
to
channel
0
, detail voltage
value, see table 5 -1.
4.
Send “
Offset Calibration
$(Addr)1
” to analog input module
five times.
5.
Apply the correct
span voltage
to
channel 0
, detail voltage value,
see table 5 -1
6.
Send “
Span Calibration
$(Addr)0
” to analog input module
five times..
Repeat procedure 3 to procedure 6 two times
CJC Calibration Procedure
1.
Ensure that the NuDAM units has been powered up for at least 30
m inutes and is located away from sources of heat, in still air at
constant temperature.
2.
Place a calibrated temperature meter, with a resolution of 0.1
°
C, in
close proximity to the CJC sensor of the NuDAM module.
3.
Send command “
Read
CJC Status $(Addr)3
” to read
temperature of CJC, then compare the temperature returned from
the CJC sensor with the calibrated temperature
4.
If the difference is less than
±
0.1
°
C
,
the CJC offset is correctly
calibrated, if it is greater or less, proceed to step 5
5.
Send “
CJC Offset Calibration $(Addr)9(+0000)”
to set initial
CJC offset value to zero.
6.
Repeat step 3, then proceed to step 7.
7.
Send “
CJC Offset Calibration $(Addr)9(Counts)
” to correct the
CJC offset error.(counts is a 4-characters with a sign + or -,range
is 0000 to FFFF, each count equals approximately 0.0153
°
C).
(
F o r m o r e d e t a i l , p l e a s e r e f e r t h e C J C O f f s e t C a l i b r a t i o n
Command
).
8.
Repeat procedure 4 to procedure 7 if the CJC value still does not
conform to the ambient temperature.
Summary of Contents for NuDAM-6017
Page 2: ......
