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13. APPENDIX C - INTERNAL DIP SWITCH SETTINGS
The DIP switch identified as SW2 on the
631-X control board is located at the top
center of the board.
CAUTION:
Switch the instrument’s power to OFF before opening the instrument
and changing DIP switch settings.
DIP Switch Settings:
Switch # Position Function Comment
1 ON AUTORANGE DISABLED (SEE DIP SWITCHES 5 & 6)
1 OFF AUTORANGE ENABLED
2 X NOT USED
3 X NOT USED
4 ON
ZERO DISPLAY:
00-99
4 OFF
ZERO DISPLAY:
L-O-H
Switch # Function Comment
5 6 RANGE SAMPLE TIME
ON ON 0 (.000 - .099PPM) 30 SECONDS
ON OFF 1 (0.10 - 0.99 PPM) 25 SECONDS
OFF ON 2 (01.0 - 09.9 PPM) 16 SECONDS
OFF OFF 3 (10 - 50 PPM) 13 SECONDS
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