6
7
Operating Instructions
Note:
Use the foam windscreen when measurements are made outdoors. Do not blow into the
microphone opening because incorrect noise dose readings will result.
Normal Mode
(Daily Dose)
Test Time: Up to 16 hours
Power ON:
• Press and
release
the power button. The red 3200% LED is stead y,
followed by
one
LED sweep.
• The previously measured dose displays for about 10 seconds while the
red 3200% LED remains steady.
• If the previous dose was 3200%, the red 3200% LED
flashes
.
• When the red 3200% LED turns off, a slow flashing of the green 25%
LED begins, indicating the start of the measurement.
• The dosimeter continuously displays the current dose, indicated by a
flashing LED.
• After 16 hours, the accumulated dose is displayed for about 8 minutes.
• During the display period, the red 3200% LED is
steady
and the
flashing LED indicates the dose.
In cases where the accumulated
dose is 3200%, the red 3200% LED flashes
.
• At the end of 8 minutes, the dosimeter automatically shuts off.
• The dose is stored in memor y and is displayed when the device is
powered on again.
Power OFF:
• To power off the dosimeter prior to its automa tic shutdown: Press and
hold
the power button until a pair of lights flashes (about 3 seconds) then
release
the button.
• Wait 5 seconds before powering ON again.
Interpreting Results — Normal Mode
Operating Instructions
(continued)
Quick Check
(Estimated
Hourly
Dose)
Test Time: 2 minutes
Note:
Use the foam windscreen when measurements are made outdoors. Do not blow into the
microphone opening because incorrect noise dose readings will result.
Power ON:
• Press and
hold the power button for 5 seconds
. The red 3200% LED
is steady, followed by
several
LED sweeps. Release power button.
• The previously measured dose is displayed for about 10 seconds while
the red 3200% LED remains stead y.
• When the red 3200% LED turns off and the green 25% LED flashes,
the two-minute Quick Check starts.
• After 2 minutes, the steady red 3200% LED indicates the test is over.
•
The flashing LED indicates the estimated dose
per hour
.
•
During the display period, the red 3200% LED remains
steady
, unless
the estimated dose is 3200%, then the red 3200% LED
flashes
.
•
The estimated dose
per hour
displays for 1 minute, then the
dosimeter shuts off.
•
The dose is stored in memor y and is displayed when the device is
powered on again.
Power OFF:
• To power off the dosimeter prior to its automa tic shutdown: Press and
hold
the power button until a pair of lights flashes (about 3 seconds)
then
release
the button.
• Wait 5 seconds before powering ON again.
Interpreting Results — Quick Check (2-minute test)
LED
Dose %
Risk Factor
Hearing Protection Needed
green (slow flash) < 25%
No risk of hearing loss
NO
green (fast flash)
25%
No risk of hearing loss
NO
green
50%
1/2 daily dose reached
NO
yellow
100%
Limit of permissible exposure
YES
red
200%
2x allowable daily dose
YES
red
400%
4x allowable daily dose
YES
red
1600%
16x allowable daily dose
YES
red
3200%
32x allowable daily dose
YES
Muffled hearing and
ringing in the ears is
likely after unprotected
exposure
If the LED color is:
The estimated dose
The estimated dose
per hour is:
per 8 hours is:
green (slow flash) < 25% < 200%
green (fast flash)
25%
200%
green
50%
400%
yellow
100%
800%
red
200%
1600%
red
400%
3200%
red
1600%
red
3200%