Mengshen HT-80A Sound Level Meter User Manual

Mengshen HT-80A Sound Level Meter User Manual

Safety information

Read the following safety information carefully before attempting to operate or service the meter.
Use the meter only as specified in this manual; otherwise, the protection provided by the meter may be impaired.

Environment conditions

1. ltitude up to 2000 meters
2. Relatively humidity 90% max.
3. Operation Ambient 0~40°C

Maintenance & Clearing

1. Repairs or servicing not covered in this manual should only be performed by qualified personnel.
2. Periodically wipe the case with a dry cloth. Do not use abrasives or solvents on this instruments.

General Description

Thank you for using our Sound Level Meter. To ensure that you can get the most from it, we recommend that you read and follow the manual carefully before use.
This Sound Level Meter has been designed to meet the measurement requirements of safety Engineers, Health, Industrial safety offices and sound quality control in various environments.

• Ranges from 30dB to 130dB at frequencies between 31.5Hz and 8 KHz.
• Display with 0.1dB steps on a 3 digits LCD.
• ith the equivalent weighted sound pressure levels,.A

Specifications

Frequency range : 31.5Hz~8KHz
Measuring level range : 30~130dB
Frequency weighting : A
Microphone : 1/2 inch electret condenser microphone
Display : LCD
Digital display : 4 digits
Resolution : 0.1dB
Display Up data : 0.5sec.
Time weighting : FAST(125mS)
Accuracy : ±1.5dB (under reference conditions)
Alarm function : “OL” is show when input is out of range
Auto power off : Meter automatically shuts down after approx. 15 minutes of inactivity.
Power supply : One 9V battery, 006P or IEC 6F22 or NEDA 1604.
Power life :About 50hrs(alkaline Battery)
Operation temperature: 0 to 40°C(32 to 104°F)
Operation humidity : 10to 90%RH
Storage temperature :- 10 to 60°C(14 to 140°F)
Storage humidity : 10 to 75%RH
Dimensions : 1705835mm 107g(N/W)
Package : 9V battery, carrying case, Instruction manual.

Name and Functions

1. Windscreen
   If you operate at wind speed over 10m/sec, please put protective accessories in front of the microphone.

2. Display
   

3. “HOLD” button
   Data Hold button: Press and hold the Button to trun on or off data hold function
   The hold function freezes the reading in the display.
   Press the HOLD key for 3 seconds to turn on/off the backlight.

4. “MAX/MIN”button

5. The MAX/MIN button is used to measure the maximum and minimum level of sounds.
   Press the MAX/MIN button two seconds,the meter will be go on measuring.

6. On/Off button

7. Tripod hole： fixed the meter on the tripod

8. Battery cover

Measurement Preparaion

1. Battery loading
   Remove the battery cover on the back and put in one 9V Battery.

2. Battery Replacement
   When the battery voltage drops below the operating voltage, mark”BAT”appears. If it appears, battery should be replaced with new one.

Operating Precautions

1. Wind blowing across the microphone would bring additional extraneous noise.
   Once using the instrument in the presence of wind, it is a must to mount the windscreen to not pick up undesirable signals.

2. To achieve more accurate measurement, use an extension cable to separate the Microphone from the main body so that the effect of unexpected sound reflection can be eliminated.

3. Calibrate the instrument before operation if the instrument was not in use for a long time or operated at bad environment.

4. Do not store or operate the instrument at high temperature and high humidity environment.

5. Keep microphone dry and avoid severe vibration.

6. Please take th e battery and keep the instrument in low humidity environment. When not in use.

Measurement

1. Open battery cover and install a 9-volt battery in the battery compartment.
2. Hold the instrument comfortably in hand or fix on tripod and poin the microphone at the suspected noise, the sound pressure level will be displayed.
3. When MAX(maximum)mode is chosen. The instrument wil show the maximum and minimum reading on the display.
4. When HOLD (data hold) mode is chsen. The hold function freezes the reading in the display. Press the HOLD button momentarily to activate or to exit the HOLD function
5. Turn OFF the instrument and remove and remove battery when not in use.

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