DOD PS-7 operation manual 2-4Changing the Alarm Settings

2-4 Changing the Alarm Settings

The values of alarm settings on this unit can be changed. The method for changing them is explained here.

(1) Release the password lock. (Refer to 1-2 Releasing the Password Lock.)

(2)Press the AL switch until the alarm setting

to be changed is displayed on the LCD display.

(The bottom right of the screen, as in the table below.) The alarm setting for the actual gas concentration is displayed in the middle of the screen, and the percentage of the full scale value is displayed in the bottom right corner

Gas concentration

AL switch The percentage of the full scale value

LCD Display

Indication

(Lower right)

Default value

Explanation of

the default value

Adjustable

Range

		Toxic : CDS-7	A1	10	10% F.S.
A1	**	Comb. : CHS-7				0 to 100% F.S.
		Oxygen: COS-7	A2	72	72% F.S.
		Toxic : CDS-7	A2	20	20% F.S.
A2	**	Comb. : CHS-7				0 to 100% F.S.
		Oxygen: COS-7	A2	76	76% F.S.

*Pressing the AL switch changes to 1st level Æ 2nd levelÆ Normal display.

*The A2 value should be greater than the A1 value in any case.

(3) Press the special command switch. The setting to be changed and the “—“ indication will then flash alternately.

Special command switch

- - - - -

UP/DOWN switches

A1 10

(4) Change the value by using the UP/DOWN key “U” and”V”.

When you are done, press the special command switch again, and the alternating display in the lower right corner of the LCD display will become constant. The process is now finished.

(5) When this is finished, press the UP/DOWN switches (“U” or”V”) again to return to the normal display.

Note

The relationship between 1st level and 2nd level alarm values of each alarm mode is as follows: