46
Hexadecimal numbers 01 to 7F (for internal interrogation) and 81 to FF (for external interrogation) are
printed on the switches. Choose the desired number of recirculations from Table 2B and set SW1 and
SW2 to the corresponding hexadecimal numbers.
Table 1B
Resolution vs. Recirculations
Resolution Recirculation
0.004 1
0.002 2
0.001 4
0.0005 8
0.00025 16
0.000125 32
Values are calculated using a 27-28 MHz Crystal.
Table 2B
Recirculation Switch Settings
Internal Interrogation Recirculations External Interrogation
SW 2 SW 1 SW 2 SW 1
0 1 1 8 1
0 2 2 8 2
0 4 4 8 4
0 8 8 8 8
1 0 16 9 0
2 0 32 A 0
4 0 64 C 0
7 F 127 F F
B.2 Setting Update Time (Internal Interrogation)
SW3 is the programming switch that is used to set the update time for internal interrogation.
NOTE:
SW2 disables SW3 in external interroga-
tion. That is, setting SW2 to any hexa-
decimal number past 7 will disable SW3.
SW3 is pre-programmed for external
interrogation from the factory.
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