Counting these overflows on another counter extends the counting capacity of the Model 994. This option is field-installable and derives its power from the 117 V ac lines in the bin. 8 decades for counts ranging from 0 to 99,999,999 in each of 2 counters. TIME BASE 10-MHz clock with minimum preset or displayed intervals of 0.01 seconds or 0.01 minutes. Synchronizing error is nominally 100 ns.
P is reached on the blind preset register.
M and N are digits ranging from 0 to 6. With the 0.01-second time base, preset times from 0.01 to 990,000 seconds can be used. Preset times from 0.01 to 990,000 minutes are available using the 0.01-minute time base. In the Ext time base mode preset counts in the range of 1 to 99,000,000 can be used. The indicator remains on until a reset is generated.