Ludlum Measurements 25009185, Руководство пользователя

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4.9. SETUP PAGE 4 47
Secondary Units COUNT Mode Alarm 2 - A short press of ON/ACK to select the value to ad-
just, and MODE to adjust the value. Units will be the same as selected earlier with Secondary
Count Units. The ALARM LCD Segment will remain solid to indicate Alarm 2. Set this Alarm
to 000 to disable. Available values are:
• Ones Place (0-9)
• Tens Place (0-9)
• Hundreds Place (0-9)
• Number of Decimal Places (0, 1, or 2)
• Range (k on/off for cpm, cps, dpm, Bq;
µ
, m or none for R/h and Sv/h)
ð
If the Secondary Count Units has changed to a value other than that used to
previously set this Alarm Point, the Alarm Point will be reset to 000.
4.9 Setup Page 4
Response Time - A short press of ON/ACK to select the value to be adjusted, and MODE to
adjust the value. Setting the Response Time to a fixed value is useful primarily when per-
forming surveys to a fixed MDA (Minimum Detectable Activity) level. Setting the Response
Time to 0 will enable the Auto-Response mode for the Model 3001 (see the next parameter).
Available values for the Response Time (in seconds) are:
• Ones Place (0-9)
• Tens Place (0-6, 6 forces max Response Time of 60)
Auto-Response Rate - A short press of ON/ACK to select Fast (F) or Slow (S). When operating
in Auto-Response mode, the Model 3001 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 4.7: Response Time Based on Count Rate
December 2021