A
djusting my
M
ini’s sensitivity
We recommend you have your staff technician or armorer perform the adjustment, and keep track of what level
the unit has been adjusted to. After the first time, a technical can adjust a unit in two minutes.
Tools:
A good, directable light source
A 2 mm blade screwdriver, about 4” long (standard computer/jeweler screwdriver)
A small philips screwdriver
Procedure:
1) Turn off the
M
ini.
2) Open the battery door with the small phillips
3) Remove the batteries
4) Look between the two battery stops at the back of the battery compartment and you’ll see a small 16-
position switch. You’ll need a bright light to see down that far.
5) With the 2 mm screwdriver, turn the switch clockwise to raise the value.
6) Log the switch setting for that serial number.
7) Replace the batteries and close the door.
8) Turn the unit on and use it normally.
We recommend adjusting the switch in 2-position steps and then using it for a while. If it still isn’t to the desired
level of sensitivity, adjust it further. Once a single mini is configured and tested for an area, the other
M
ini’s can
be set to the same level.
If I know the setting on the adjustment switch that I prefer, do I have to change all the
M
ini’s or can it be
done by D-Tect Systems before delivery?
We will adjust the
M
inis to your desired level before delivery. We can also ship you a
M
ini in advance and allow
you to experiment and determine if any adjustment to the sensitivity level is desired.
Can the
M
ini tell me when radiation levels are hazardously high?
Yes. The
M
ini displays an alarm level of ‘1’ through ‘9’. This value tells you the number of photons being
measured at the detector. The point where the displayed alarm goes from an ‘8’ to a ‘9’
is equivalent to a dose
rate of at least 2 m
R
em/hour. To determine whether the detected radiation source is at a hazardous level, you
need to find the range from the source where the Mini display switches from an ‘8’ to a ‘9’. Once the range is
known, it is easy to determine an approximate dose rate on
the
reference
card. (See Figure 1)
LAURUS Systems, Inc. - Ph: 410-465-5558 - Fax: 410-465-5257 - www.LaurusSystems.com
Alarm Level Equivalents (figure 1)
Alarm Level
mRem/Hr
uSv/Hr
1
0.035
0.35
2
0.04
0.40
3
0.055
0.55
4
0.065
0.65
5
0.1
1.00
6
0.2
2.00
7
0.35
3.50
8
0.6
6.00
9
1.1
11.00
