7
2-4.
Checking of preset alarm levels
Press ●mark of AL/SET switch by control key for more than 5 seconds. When the
switch is being pressed, 「Alarm pattern」, 「1
st
alarm level」 and 「2
nd
alarm level」are
indicated by turns in every 1 second on LCD (See below fig.).
When 1
st
alarm point is indicated, AL1 light is lighting, AL2 light is keep lighting
when 2
nd
alarm point is indicated.
When releasing the control key, they return to concentration display.
To change AL1 and AL2, please see 「3-6 Setting of alarm levels」 in maintenance
mode.
2-5.
Cautional display for sensor deterioration
When detecting sensor deterioration during selfdiagnosis or measurement, BRIGHT
light and/or CONT light flashes to show the deterioration of the sensor.
Flashing of BRIGHT light
This is a cautional indication for the decrease of
light amount. This means the decrease of light
amount for the light source of interferometric
sensor. Recommend to replace or repair the
interfermetric sensor before interruption of
measurement.
CAUTION
！
b-contact( Break contact) at non-exiting condition may change to open
contact
in a moment due to physical shock.
Whenever alarm signals are used with b-contact(option), please put delayed
circuit( for about one second) to receiver side of b-contact to avoid such
phenomenon.
H . H H .
Alarm pattern
Every 1 second
１ ２
Flashing
２ ５
Display of 1
st
alarm level
５ ０
Display of 2
nd
alarm level
