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6-4.ALARM function:
6-4-1.Upper and lower range of settings: eg 4-5-7 Option Description
6-4-2. After the range setting, press ▼ / ALARM KEY> 2 SEC. ALARM function is
entered, and the top right corner of the screen will appear the words ALM.
(eg SCREEN16)
6-4-3.When the measured value equivalent ≧ upper limit set value or ≦ lower
limit value, and the digital will flash a warning sound, there will be alarm
output (Open collector)(3-11, Fig.1).
A.Hysteresis = Measured value * 5 %.
B. High ALARM status:
Measured value ≦ (upper limit set value - Hysteresis value), the Alarm
goes OFF.
C. Low ALARM status:
Measured value ≧ (lower limit value + Hysteresis value), the Alarm goes
OFF.
D.Example: PM upper limit set value=50, PM lower limit value=30.
D-1.When the measured value PM=50, then ALARM to ON.
D-2.When the PM when the measured value=45, H=50 * 5%=3,
(45 ≦ (50-3)), so 45 ≦ 47 ALARM goes OFF.
D-3.When the measured value PM=30, then ALARM to ON.
D-4.When the measured value PM=35, H=30 * 5% =2, (35 ≧ (30+2)),
so 35 ≧ 32 ALARM goes OFF.
6-4-4.Press ▼ / ALARM KEY> 2 SEC. ALARM function is canceled.
(eg SCREEN1)
6-4-5. ALARM function interface Description.
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