Tenma ST-95 User Manual Download Page 3

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Page <3>

V1.0

12/04/18

  

RANGE/(A/C) button

: Short press to switch range gear; Long press to switch unit.

    

Bluetooth button

: Long press to active or deactive Bluetooth.

  

HOLD/

 

button

: Short press to hold the current data; Long press to activate or deactivate backlight.

  

MAX/MIN button

: Press to record Maximum, Minimum

Note:

  MAX/MIN button, range button and A/C button will be deactivated when hold the current readings and the instrument 

will exit MAX/MIN recording function when switch range gear.

5. Display Layout

    : Bluetooth symbol
    : Low battery indicate
    : Timing power off symbol
  

MAX

: Maximum hold

  

MIN

: Minimum hold

  

Two smaller digits at upper left of display

: Minimum range

  

Three smaller digits at upper right of display

: Maximum range

  

UNDER

: under range

  

OVER

: over range

  

dBA, dBC

: A-weighting, C-weighting.

  

AUTO

: Auto range selection

  

HOLD

: Data hold function

  

Four larger digits in middle of display

: Measurement data.

Measurement Operation

• 

Turn on the instrument by pressing power on/off button.

• 

 Short press button “RANGE” and select suitable measurement range based on no “UNDER” or “OVER” display on LCD.

• 

Select “dBA” for general noise sound level and “dBC” for measuring sound level of acoustic material.

• 

 Hold the instrument in hand or fix it on tripod, take measure at a distance of 1-1.5 meters between microphone and 

source.

Data Hold

     Press hold button to freeze the readings and “HOLD” symbol displays LCD. Press hold button again to return normal 

measurement.

MAX/MIN reading

• 

 Press MAX/MIN button for the first time, the instrument will enter Max tracking mode, the tracked Max reading will display 

on the LCD.

• 

 Press MAX/MIN button for the second time, the instrument will enter Min tracking mode, the tracked Min reading will 

display on the LCD.

• 

Press MAX/MIN button for the third time, the current reading will display on the LCD.

Bluetooth communication

     Long press Bluetooth button to activate Bluetooth function, it communicates after connect with the software. The instrument 

can transmit measured data and instrument status to software and the software can control the instrument.

The instrument will automatically turn off in order to lengthen the battery working life. When symbol   appears on the LCD, 

please replace the old battery with new ones.
• 

Open the battery compartment with a suitable screwdriver.

• 

Replace 9V battery.

• 

Mount the battery compartment again.

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