Center 390, Инструкция по эксплуатации, Страница: 11 / 20

Sound Level Meter
9
7. SETTING THE DATA AND TIME
Year/month/day
Hour/minute/second
The unit incorporates a clock which allows recording the date and time along
with measurement data on the memory.
(1) Press and hold button at least 2 seconds.
(2) Press or to increase or decrease number, press clock button to
adjust next item.
The adjusting order is
year
→
month
→
day
→
hour
→
minute
→
second , then
press button to finish adjusting. If you want abort during a setup
process, press button to cancel.
Note: An internal rechargeable backup battery keeps the clock of the unit
running when the power is turned off the backup battery is recharged by the
main batteries. The clock will keep running for 30 minutes on the backup
battery alone. If the unit is not to be used for an extended period, the main
batteries should be taken out to prevent possible damage due to battery fluid
leakage. After reinserting the batteries, be sure to set the date and time.
8. CALIBRATION PROCEDURES
(1) Make the following switch settings.
ƒ
Display: dBA
ƒ
Time weighting: FAST
ƒ
Measurement mode:
MAX MIN Mode function disables.
ƒ
Level range: 30 to 130dB.
(2) Insert the microphone housing
carefully into the insertion hole of the
calibrator.
(3) Turn on the switch of calibrator and
adjust the CAL potentiometer of the unit.
The level display will indicate the
desired level. All products are well
calibrated before shipment.
Recommended Recalibration cycle:
1 year.
Acoustic
Calibrator
Screwdriver