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Switch Positions
Switch 1 and 2 select the M-27 functions.
Switch 1 and 2 are read only on RESET and when the battery is replaced.
Switch 3 selects printer options.
Switch 3 is read at the start of each printout and may be changed without destroying data.
SWITCH 1
Position 1 On = "C" weighting Off = "A"
Position 2 On = 30 dB Range Off = 50 dB Range
Position 3 In 30 dB Range
On = 115 dB U.L. Off = 90 dB U.L.
In 50 dB Range
On = 140 dB U.L. Off = 115 dB U.L.
Position 4 On = Fast Off = Slow
Positions 5 6 Criterion Level
Off Off =80 dB
Off On =84 dB
On Off =85 dB
On On =90 dB
Positions 7 8 Exchange Rate
Off Off = 3 dB
Off On = 4 dB
On Off = 5 dB
On On = 6 dB
SWITCH 2
Positions 1 2 3 4 HTL LTL
Off Off Off Off = 70 dB none
Off
Off
Off
On
- 70
dB
none
Off Off On Off = 75 dB none
Off Off On On = 80 dB none
Off On Off Off = 85 dB none
Off On Off On = 90 dB none
Off On On Off - 75 dB 70 dB
Off On On On = 80 dB 70 dB
On
Off
Off
Off
= 85
dB
70 dB
On
Off
Off
On
= 90
dB
70dB
On Off On Off = 80 dB 75 dB
On Off On On = 85 dB 75 dB
On On Off Off = 90 dB 75 dB
On On Off On = 85 dB 80 dB
On On On Off = 90 dB 80 dB
On On On On = 90 dB 85 dB
Position 5 On = 24 hour Off = 12 hour
Position 6 7 8 Unit
Off Off Off = 0
Off
Off
On
= 1
Off On Off = 2
Off
On
On
= 3
On Off Off = 4
On
Off
On
= 5
On On Off = 6
On On On = 7
SWITCH 3
Position 1 On = Busy Off = Data Set Ready
handshake
Position 2 On = Parallel printer Off = Serial printer
Normally positions 1 and 2 are set the same.