Model 3000 Survey meter User’s Manual Section 4
Ludlum Measurements, Inc. Page 4-10 April 2021
Or likewise for Bq/cm
2
, efficiency could be calculated as: efficiency = count
rate/disintegration rate*detector area (in cm
2
). For example, with the same
detector as above with an area of 15 cm
2
, and starting with an efficiency value of
15%, then the parameter could be changed to 225% to measure in Bq/cm
2
.
High Voltage (Default 900 Volts) - Tap ON/OFF to select the value to
adjust, and MODE to adjust the value. Value is in Volts. Available values are:
Ones Place (0-9)
Tens Place (0-9)
Hundreds Place (0-9)
k Multiplier (on/off)
Note: k multiplier also activates left-most decimal point. If k multiplier is used,
Hundreds Place value is limited to 0 and 1.
Pulser Threshold (Default 35 millivolts) - Tap ON/OFF to select the
value to adjust, and MODE to adjust the value. Available values are:
Ones Place (0-9)
Tens Place (0-9)
Hundreds Place (0-1)
Note: Audio is enabled for this parameter only for ease of setting.
Detector Current Overload Threshold (Default 100) - Tap ON/OFF to
select the value to adjust, and MODE to adjust the value. Setting the Detector
Current Overload Threshold to 0 disables the Current Overload Alarm.
Available values are:
Ones Place (0-9)
Tens Place (0-9)
Hundreds Place (0-9)
A long press (at least a half second) of the audio button will cause the display to
show the actual live current reading. Repeating this process will return you back
to the overload threshold set point.
Loss of Count Alarm Time (Default 60 seconds) - Tap ON/OFF to select
the value to adjust, and MODE to adjust the value. Setting the Loss of Count
Alarm Time to 0 disables the alarm. Value is in seconds. Available values are:
Ones Place (0-9)
Tens Place (0-9)
Hundreds Place (0-9)
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