HT instruments HT157 - Manual (Page 38)

HT155 - HT157
EN - 36
Line 4
This line indicated the sound pressure level set on the portable calibrator
HT151 during the calibration operation (see § 6.1.3)
Line 5
This line shows the results of the calibration operation. When the
instrument is calibrated by means of frequency weighting type C, “Lpx=”
indicates the current sensitivity level of the microphone
Line 6
This line contains the menu items which can be selected by the user
 The “Rec.” option allows displaying the results of each calibration
operation
 The “Cal.” Option allows activating the calibration procedure (see §
6.1.3)
 The “App.” option is used for saving each setting defined by the user
during the manual adjustment procedures of the sensitivity levels
 The “Mod.” option is used for the selection of the items relevant to the
manual adjustments of the sensitivity levels