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5-5. Operation Buttons
Item
Component
Panel
marking
Description/Function
1
SPAN button
(Span adj. button)
SPAN
Performs span adjustment. For O2 sensor unit
(COS-7), 21%vol adjustment will be performed.
2
ZERO button
(Zero adj. button)
ZERO
Performs zero adjustment for toxic/flammable
gas sensor unit (CDS-7/CHS-7)
3
AL button
(Alarm setting check button)
AL
Used to check the alarm set values.
4
COMM. button
COMM.
Imports data from a currently inserted sensor at
initial startup, etc.
5
UP and DOWN buttons
UP/DOW
N
Increase/decrease the parameter value.
6
Analog output check
connector
CP
Dedicated connector to check the unit
’s 4-20
mA analog output.
7
TEST switch
TEST
Sets the unit to the test mode.
8
Button for administrator use
(Administrator use)
9
Communication connector
CN
(Unused)
1
2
3
4
5
6
7
8
9
Pull and slide down the front
cover to access the operation
buttons and TEST switch.
Opening front cover
Front cover
Slide down
Pull open
