Does it need to be calibrated every time I use the Mastech Digital Sound Level meter?
379701
I do not think so. It is hard to measure sound loudness with high accuracy anyway, so any calibration would have to be better than the factory, and for some specific purpose. I would just use it as it is, factory set.
1023068
Out of box. There are instructions for calibration, but you need to buy a sound level calibrator.
1160519
I'm not aware of a calibration function to it. It's simply quite accurate out of the package.
730698
So far, I cannot get it calibrated. They are sending a new replacement meter.
590894
(assuming you haven't yet figured this out) Yes. Remove the battery cover on the back of the meter, which will expose the settings button. Press the settings button once; L-1 (language selection) should appear. Again press the settings button (not the button marked M on the front). The volume selection should now be active. Repeatedly press the front button marked M until the volume level is set to 0 (3, 2, 1, 0 are the choices), which will mute the meter.
590895
(assuming you haven't yet figured this out)Yes. Remove the battery cover on the back of the meter, which will expose the settings button. Press the settings button once; L-1 (language selection) should appear. Again press the settings button (not the button marked M on the front). The volume selection should now be active. Repeatedly press the front button marked M until the volume level is set to 0 (3, 2, 1, 0 are the choices), which will mute the meter.
1215964
No does not require calibration. I compared with another scale and it was accurate.
970362
Sounds like it's defective. I never really calibrated mine, but it seems to work fine. Sorry! Send it back
8862
I checked the users guide and do not see any information about calibration of the unit. There is a support number you can call.
923149
OK a couple of things, Is your SPL meter set at C weighting and slow for the slew rate withe range set at 70 or 80db? Also to accuratly calibrate your speakers you would use speaker test tone generator in the setup menu. To do this go to said speaker test tone section, SLOWLY turn the volume up to 0 will running your test tone. Once your volume is at 0 use the SPL meter to adjust the gain on each speaker till it is stable between 75-80. The max I run my system is -28 and to me that is loud so be ready it will be a very loud test tone at 80DB.
2277919
It did not need calibration although I did check to make sure it was correct when I received it. I have owned it for over a year now and I keep it turned off when not using it so the batteries are still strong. I did not buy an adapter. I truly love mine. As I get older, it gets harder and harder to see, so having the weight displayed right up close is wonderful. I don't think you will be disappointed.
1240394
How do I know my equipment is working perfectly When I I trigger the test and put the audio would not have to issue a sound?
2244962
Yes, it does. I must tell you it has a tone that is at a very low volume. So if you work in a noisy environment you may not be able to hear it. Good meter for the money.
346322
To calibrate, use distilled water. You set the device to zero and thats all. You should do this once every three / four months.
818584
No you can't calibrate it. I have found it to be fairly accurate. Make sure the sensor (on the power cord) is not near the output at the top of the humidifier.
808571
Calibration is easily done by simply rotating a small screw inside the battery compartment. Unlike higher priced sound level meters, this Wensn SLM's calibration screw is very sensitive; small rotation angles cause large changes to the calibration, so be careful and double-check your adjustment. Obviously you will need either a precision calibrator or, less reliably, an already calibrated SLM to compare sound levels to. I've checked two new Wensn SLMs when first purchased and they both were within the advertised calibration range, at least for the 1000 Hz frequency that most calibrators generate. These are less accurate though and not linear enough at the extremes of their advertised frequency range. Calibration is easily done by simply rotating a small screw inside the battery compartment. Unlike higher priced sound level meters, this Wensn SLM's calibration screw is very sensitive; small rotation angles cause large changes to the calibration, so be careful and double-check your adjustment. Obviously you will need either a precision calibrator or, less reliably, an already calibrated SLM to compare sound levels to. I've checked two new Wensn SLMs when first purchased and they both were within the advertised calibration range, at least for the 1000 Hz frequency that most calibrators... » Read More Calibration is easily done by simply rotating a small screw inside the battery compartment. Unlike higher priced sound level meters, this Wensn SLM's calibration screw is very sensitive; small rotation angles cause large changes to the calibration, so be careful and double-check your adjustment. Obviously you will need either a precision calibrator or, less reliably, an already calibrated SLM to compare sound levels to. I've checked two new Wensn SLMs when first purchased and they both were within the advertised calibration range, at least for the 1000 Hz frequency that most calibrators generate. These are less accurate though and not linear enough at the extremes of their advertised frequency range. « Show Less
956224
I don't calibrate the meter. It works right out of the box for humidity level. I do not use the ph meter or the light meter. May be you can stick in in vinegar and see if it reads about 3