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6.2.2 Span calibration
(1) If the power is OFF, turn it ON.
(2) Check if the flow of span gas is approximately 1.5L/min.
(3) Display the "Span Calibration" screen.
(4) Point the
to "Component", and press the
(5) Press the
key or the
When there is only one component, it is not necessary to select.
(6) When there are two ranges, select either "Range1" or "Range2".
(7) Point the
to "Cell Length", and press the
(8) Enter the length of calibration gas cell. Standard cell length is 1000mm. (When the range is low con-
centration, the length of calibration gas cell can be either 500mm or 200mm.)
(9) Point the
to "Cal.Gas Value", and press the
(10) Enter the concentration value inscribed on the gas cylinder.
(11) Point the
to "Gas Temp.", and press the
(12) Connect the thermometer to the pipe. When output signal (4 to 20mA) is entered in the AI terminal of
the control unit, read the temperature value on the "Measurement" screen and enter the value.
(13) Enter the value in "Gas Press." in the same manner of "Gas Temp".
(14) See the value of "Meas." At the "Span Calibration" screen, and make sure that the value is not com-
pletely different from that of "Cal.Gas Value", and the indication value is stable. For easily-absorbed
gases such as HCL, it requires a certain length of time to be stabilized.
(15) Point the
to "Span Cal.Start" and press the
(16) "Span Cal.Start" blinks for about 30 seconds.
(17) When the calibration is completed, the cursor moves to "Cal.Finish", and the current date is displayed
at "LastCal.Day".
(18) When there are two ranges, replace the gas cylinder, and repeat the procedure in (6) to (17).
(19) After span calibration is completed, change gas in the gas cylinder to zero gas, and feed it for about 20
minutes.
key.
key to select the measured gas component to be span-calibrated.
Span Calibration
Component
HC ℓ
Cal. Range
Range1
Cell Length
1000
Cal.Gas Value
10.02
Meas.
00.12
Gas Temp.
0025
- 00.50
Gas Press.
LastCal.Day
2006/09/01
key.
key.
NT
- 38 -
2007-4-1
12:00:00
mm
ppm
ppm
℃
kPa
Span Cal.Start
Cal.Finish
key.
key to start span calibration.
INZ-TN1ZSS-E
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