<6. Calibration>
6-3
IM 11R02A01-02E
5th Edition : Dec. 28, 2016-00
4) Switch the “METER” switch of the calorie detector to “P.MEAS” and measure X5 of the
computing station. Wait until the indicated value is stabilized and then record the value. (E0
mV)
5) Switch the “SAFE EV” switch of the calorie detector to “SET.”
6) Stop the air supply to the gas line, supply the span gas, and start the ignition action.
7) Measure X5 of the computing station. Wait until the indicated value is stabilized and then
record the value. (Ec mV)
8) Set the computing station to Input/Output status display and adjust the “SPAN”
potentiometer of the calorie detector so that “X1” will show the specified value (x%). WI is to
be used to find out the value of x.
For example:
WI value of the upper range = 5.00 WI
WI value of the span gad = 4.90 WI
Eo = 4 mV, Ec = 19 mV
x =
100 = 98.4 %
(19-4) x
+ 4
19
5.00
4.9
x =
(Ec – Eo)
+ Eo
100
Ec
Ws
Wc
Ec
100
x
Eo
0
Thermocouple
output (mV)
WI value of the span gas
WI value of the upper range
WI value of the span gas: Wc
WI value of the upper range: Ws
WOBBE INDEX [WI]
NON-CORR. WI [%]
F0703.ai
Figure 6.1 How to Find Out x When Preheating Circuit Exists
