Duomo 7701 매뉴얼 - 페이지 2

{카테고리_이름} Duomo 7701에 대한 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. Duomo 7701 2 페이지. Co detector

페이지 인쇄

Fresh Air Correction

To ensure accuracy it is recommended that the unit be

turned on in fresh air. For 0

hold buttons 1 and 2 simultaneously. The unit will flash

continually for about 10 minutes, then return to normal

operation.

For 100 or 500

correction, press and hold button 1

ppm

to select the required value and place the unit into a

sealed box filled with standard gas of that value.

Check that the reading meets the the selected value. If

it does, correction has completed successfully. If not,

repeat the procedure.

Ignore any erratic readings during correction. These are

caused by electromagnetic interference (EMI).

To abort correction at any time, simply turn the meter

off.

CAUTION: For 0

correction, it is strongly suggested

ppm

that the unit be turned on in an environment free from

CO. Correcting the unit at this value in an area with high

levels of CO could cause the unit to fail at self-test.

CO Levels

ppm

Symptoms and applicable standard

0 - 1

Normal background levels.

Maximum indoor air quality level. Maximum

allowable concentration per ASHRAE

Residential standards 62 - 1989 for living area.

Maximum limit 8hrs. of continuous exposure

per California OSHA workplace standards.

Maximum 8 hrs. average exposure level per

US OSHA workplace standards.

Maximum concentration for continuous

exposure in any 8 hrs. average level per OSHA

standards.

Remove employees from enclosed space if CO

concentration exceeds 100ppm per OSHA

100

exposure limit.

Mild headache, fatigue, nausea and dizziness

200

within 2 - 3 hrs.

Frontal headache, life threatening after 3 hrs.

Maximum concentration in flue gas per the US

400

EPA and AGA standards.

Dizziness, nausea, convulsions, death within 2 -

800

3 hrs.

1600

Nausea within 20 mins., death within 2 - 3 hrs.

w: www.duomo.co.uk

correction press and

ppm

e: [email protected]

Specification

Range of 0 - 999

Resolution of 1

Accuracy;

± 20% at 0

± 15% at 100

Alarm Thresholds

25, 30, 35, 45, 50, 70, 100 and 200

Fresh air correction

Can be corrected to 0, 100 and 500ppm

Warm Up

15 seconds

Power

3 pcs AAA batteries (supplied)

Battery Life

250 hours when backlight is off, 35 hours when on

Troubleshooting

Power on but no display

Press button 2 for more than 0.3 seconds and try

again. Check whether batteries are in good contact

and correct polarity is observed.

Display disappears

Check if low battery indicator is on. If so, replace the

batteries.

Fresh air correction failure

Check if low battery indicator is on. If so, replace the

batteries. Make sure the standard gas is correct.

Error messages

E 2: The value is under range

E 3: The value is over range

E 4: Error due to some original data

E 31: A/D failure, return meter to dealer for repair

E 33: Measurement cicruit failure, return meter to

dealer for repair

Notices

Keep the meter away from electromagnetic

interference (EMI) which may cause erratic readings.

Recovery time is required if the unit is exposed to

high levels of CO. The longer the length of exposure,

the longer the recovery time needed.

t: 01905 797989

ppm

~ 100

ppm

500

ppm

f: 01905 774296