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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 1.5 to 2.0 L/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) Point the
to "Cell Length", and press the
(7) 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.)
(8) Point the
to "Cal.Gas Value", and press the
(9) Enter the concentration displayed on the gas cylinder.
(10) Point the
to "Gas Temp.", and press the
(11) 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. When the
range is low concentration, the value may be affected by gas temperature.
(12) Enter the value in "Gas Press." in the same manner of "Gas Temp".
(13) 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. It takes 5 minutes until the gas is
stabilized at the earliest, and it may not be stabilized even an hour, depending on the diameter, length of
exhaust tube, the gas cylinder and regulator.
(14) Point the
to "Span Cal.Start" and press the
(15) "Span Cal.Start" blinks for about 30 seconds.
(16) When the calibration is completed, the cursor moves to "Cal.Finish", and the current date is displayed
at "LastCal.Day". When the date is updated, you can move the cursor. If there are two components to
be calibrated, repeat the steps from 5 to 16.
key.
key to select the measured gas component to be span-calibrated.
Span Calibration
Component
HC ℓ
Cell Length
1000
Cal.Gas Value
0010.02
Meas.
00.12
Gas Temp.
0025
Gas Press.
- 00.50
LastCal.Day
2018/01/01
key.
key.
NT
- 48 -
2018-04-01
12:00:00
mm
ppm
ppm
℃
kPa
Span Cal.Start
Cal.Finish
key.
key to start span calibration.
INZ-TN8ZSS-E
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