4.3 - Calibration
54
TCT-2301 Operating instructions
M2007/3en
©BTG 2004
4.3.3.4
Calculate calibration
The calibration will not be effective until the calibration value is calcu-
lated.
Go to menu
and
.
The calculation is presented in a graph.
To activate the calibration, send the calibration value to the transmitter.
Go to main menu and
.
4.3.4
Multi-point calibration
When single-point calibration is not sufficient a multi-point calibration
can be used.
Take samples for up to 9 calibration points under different conditions.
Try to collect samples that cover the entire consistency span.
If the calibration points (the lab value) are spread over at least half the
chosen measuring span, both calibration constants K0 and K1 will be af-
fected. Otherwise only K1 will be affected and K0 will be 0.
The more points you sample, and the wider their spread within the
measuring span, the more accurate the calibration will be.
Perform sampling as in single-point calibration, but take more samples
and activate more than one sample in the ”Load lab menu”.
Calculate new K0 and K1.
4.3.5
Calibration with given constants
The two calibration constants K0 and K1 define the calibration curve.
It is a simple matter to enter new constants under
,
. Step
down through the menu
and enter desired value.
Cali-
brate
Calc
new
calibr.
Send
data
4-20mA MODEMPRINTER
PWR
EJECT
ON/OFF
MEMORY CARD
SPC-1000
Communication Terminal
Probe
signal %
2.0
Lab
0.5% 2.0 cons. %
Menu
Constants
k0 = 26.68
k1 = 7.87
Correl.:
r2= 1.0000
Cali-
brate
Special
func.
Edit
row
x
SPC-1000
Communication Terminal
4-20mA MODEMPRINTER
PWR
EJECT
ON/OFF
MEMORY CARD
SPC-1000
Communication Terminal
No.
Probe
Lab.-
Active
signal cons.
1
1.52%
1.66%
ON
2
1.77%
1.86%
ON
3
1.30%
1.34%
ON
4
1.09%
1.10%
ON
5
0.00%
0.00%
OFF
6
0.00%
0.00%
OFF
7
0.00%
0.00%
OFF
8
0.00%
0.00%
OFF
9
0.00%
0.00%
OFF
k0 = 0.1366
k1 = 0.8613
Menu
Edit
row
1
Load
lab.
cons.
Calibr.
curve
Load
probe
signal
ON/OFF