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CHAPTER 4. SETUP MODE
Response Time to 0 will enable the Auto-Response mode for the Model 3002 (see the next
parameter). Available values(in seconds) are:
• Ones Place (0-9)
• Tens Place (0-6, 6 forces max Response Time of 60)
Auto-Response Rate (Default S) -
A short press of MODE to to select Fast (F) or Slow (S).
When operating in Auto-Response mode, the Model 3002 will vary the Response Time based
on the Auto-Response Rate selected (Fast or Slow) and the current Count Rate. The following
table shows the response time for different count rates when these auto response modes are
chosen:
Count Rate
Auto
Response
Time - Fast
(Seconds)
Auto
Response
Time - Slow
(Seconds)
Less than 3kcpm (50cps)
10.5
21
Between 3 kcpm and 4 kcpm (67 cps)
8.4
16.8
Between 4 kcpm and 6 kcpm (100 cps)
6.3
12.6
Between 6 kcpm and 12 kcpm (200 cps)
4.2
8.4
More than 12 kcpm
2.1
4.2
Table 4.2: Response Time Based on Count Rate
The Model 3002 also utilizes a Step function in Auto Response mode, which enables faster
response to a significant increase or decrease in Count Rate. When the instrument detects a
sudden change in count rate from the detector, the response time is reduced to 1 second to
quickly show the new value.
Operational Modes (Default 0 - All modes available) -
A short press of MODE to adjust the
value. Available values are:
• 0 - RATE, MAX and COUNT modes
• 1 - RATE and MAX Modes only
• 2 - RATE AND COUNT Modes only
• 3 - RATE Mode only
Count Time -
A short press of ON/OFF to select the value to be adjusted, and MODE to
adjust the value. Setting Count Time to 0 enables continuous count until reset. If 9 minutes
are selected, then the maximum seconds value is 60; otherwise, the maximum seconds value
is 59. Available values are:
• Ones Place (0-9)
Ludlum Measurements, Inc.
