Figure 10 consists of a central column showing the display code characters
and two main columns on each side showing the values of the selected
parameters and the settings of the 8-position switches — up or down — to obtain
the selected parameters.
The two main columns on the left relate to the left hand switch and to the
third and first characters respectively in the display code. The third character
indicates the overload, weighting, and the range setting. The first character
indicates the criterion level and exchange rate.
The two main columns on the right relate to the right hand switch and to the
second and fourth characters in the display code.
The second character indicates the two thresholds. The fourth character
indicates the number of the dosimeter. Any number from 0 through 7 can be
selected. It is used only to identify the dosimeter and does not affect operation of
the MICRO-15.
As an example, to use Figure 10 to determine the values of the selected
parameters, suppose that the display code is "EE35". Proceed as follows:
1. Locate E, the first character, in the central column.
2. Read across and in the column entitled "First Character" note that the
criterion level is 90 dB for 8 hours and the exchange rate is 5 dB.
3. Locate E, the second character, in the central column.
4. Read across and in the column entitled "Second Character" note that the
high threshold level (HTL) is 90 dB and the low threshold level (LTL) is 80 dB.
5. Locate 3, the third character, in the central column.
6. Read across and note that the overload level (OL) is 115 dB, the
dosimeter is set for "A" frequency weighting and the 50-146 dB range.
7. The fourth character is 5, the number of the dosimeter.
To select different parameters, set the switches as shown in Figure 10.
As an example, if 90 dB overload "A" weighting, and 40 to 126 dB range is
desired, set the left switch positions 2, 3, and 4 to up, down, and up respectively.
To set the criterion level to 70 dB and the exchange rate to 3 dB set positions 5,
6, 7 and 8 to up. For a high threshold of 80 and a low threshold of 70 set the right
switch positions 1, 2, 3 and 4 to down, down, down, and up respectively.
To identify this dosimeter as unit 0, set switch positions 5,6 and 7 to up.
All the switch positions in a row must be set as shown to set the correct
settings. Note as an example, the 115 dB overload switch (position 2, left switch)
could be up or down depending on the range setting. Also the threshold settings
are encoded.
The two outermost switch positions are not connected and may be left in
any position.
The MICRO-15 reads the switch positions only when the unit is reset or a
battery is reconnected. If the switch positions are changed when the unit is
operating, the change will be ignored.