6. Operation Method
6-1. Detection
1) Install the DTY-CMH-01 in the desired measurement location. (See p.
#1
,
“5-1. Installation Method.”)
2) Supply power to the DTY-CMH-01.
3) The first 5 minutes after switching on the power is preparation time to
measure. During this time, the LEDs light up sequentially to show that
preparation time is in progress. When 5 minutes have elapsed,
measurement begins.
4) The display shows 5 minutes of integrated values converted into a
cleanliness level and displayed by LEDs. Refreshes the display every 5
seconds.
Number of lighted
LEDs (red)
0
1
2
3
4
5
6
7
8
9
10
Cleanliness level
100
1,000
2,000
3,000
5,000
10,000
20,000
30,000
50,000
100,000
Over 100,000
ISO class equivalent
value (reference)
5
6
7
8
Over 8
Notes: The cleanliness levels were independently determined by Koganei, with
reference to FED STD209D.
For the relationship between the cleanliness level and number of
particles, see the output characteristics graph.
#3
6-2. Alarm output setting method
1) Use a Phillips screwdriver, etc., to rotate and set the rotary switch. The
markings on the rotary switch correspond to the LED number . For example,
if the rotary switch is set to the No.4 marking, it means that an alarm will be
turned on when the particle density causes the 4th LED to light up. (A rotary
switch setting of the zero marking corresponds to the 10th LED.) At the time
of shipping, the rotary switch is set to the zero marking.
2) Next, press the SET button. (Merely changing the rotary switch itself will not
activate the operational settings. Always remember to press the SET button.)
When the SET button is pressed, the setting value is displayed in the orange
LED and activates the operational setting, and the state returns to normal
after about 3 seconds.
※
The rotary switch can be rotated and set while holding down the SET button.
In this case, there is no need to pay attention to the markings on the rotary
switch since the setting can be performed while watching the orange LED
display. When the SET button is released, the setting shown at that time is
activated, and the state returns to normal after about 3 seconds.
Upper limit
10
9
8
7
6
5
4
0
500
1000
1500
2000
2500
3000
3500
3
2
1
Lower limit
Middle
Number of particles of 0.3
μ
m or larger (pieces/283mL)
Number of lighted LEDs
Output Characteristics
#4
