| In steps 1 to 3 only data for the HTL (High Threshold Level), LTL (Low Threshold |
| Level), or 3 dB (No |
| LTL, and 3 dB will be printed. Step 5 dumps raw data to the Computer. Step 6 reads or |
| resets the Clock. Step 7 reads or stores the Calibrator level. |
Sound Level Meter Keys | |
SOUND | Sound Level in decibels. Will repeat each second until |
LEVEL | another key is pressed. To conserve power, press RUN, |
| PAUSE or any other key to exit sound level when it is |
| not needed. |
PEAK | The highest unweighted Peak Level in decibels during |
LEVEL | Run Time or an Event. In 30 dB range lowest peak |
| measurable is 78 dB; in 50 dB range the lowest measurable is 98 dB. |
MAX | The Maximum Level in decibels after the filter and Slow |
LEVEL | or Fast time constant circuit. |
Dosimeter Keys |
|
The average integrated sound level in decibels for the | |
LEQ | HTL (High Threshold Level), LTL (Low Threshold Level), or the equivalent level for 3 |
| dB. It is the accumulated sound averaged during the Run Time. |
DOSE | The accumulated Dose in percent for HTL, LTL, or 3 dB. |
TWA | Time Weighted Average in decibels for HTL and LTL. |
SEL | It is the accumulated sound averaged over 8 hours. For |
| 3 dB it is the Sound Exposure Level of the accumulated |
| sound averaged over 1 second. |
Time Keys |
|
RUN | The total time the unit was running and accumulating |
TIME | data. If the total time is less than 30 minutes, the co- |
| lon will blink if the key is held down and the time shown is in minutes and seconds. If the |
| colon stays on, the time shown is in hours and minutes. |
PAUSE | The time the unit was on but not accumulating data. |
TIME | The colon blinks as in Run Time |
. |
|
U.L. | The time exposure was above the Upper Limit. The |
TIME | colon blinks as in Run Time. |
Event Keys | |
| The event feature accumulates Lavg/Leq, Dose, TWA/SEL for 3 dosimeters, Peak Level, Max |
Level, Run Time, and Start Time for up to 15 different events. Each time a key is pressed in the Event | |
mode, the display will show the event number and the data. | |
EVENT | Enters Events and cycles through the Events with |
| data. The display shows the event number, a "CE" if it is the Current Event or else a |
| for a previous Event. |
| As an example: 12CE means 12 is the Current Event, |
| Only previous events with data will be displayed. |
RUN | Starts accumulating data for the Current Event. |
PAUSE | Stops accumulating data and cycles to the next Event. |
RESET |
|
ON/OFF | Exits the Event mode. |
Procedure to Accumulate Event Data | |
| To enter the Event mode, press EVENT. To accumulate data, press RUN. To stop, press |
PAUSE/RESET. Press RUN and PAUSE/RESET again to accumulate another event. Press ON/OFF to exit | |
events. |
|
The following keys can be used to read data in the current event or in any previous event. | |
CODE | Cycles through HTL, LTL, and 3 dB. Displays the cur- |
HL3 | rent time or elapsed time for the current event and |
| the start time for any previous event. |