Specifications

7
Chapter 3: Operaon
Starng the Inspector EXP
Before starng the Inspector EXP, ensure that the external probe is connected both to the unit and the probe
end. Install a standard 9-volt alkaline baery in the baery compartment located in the lower rear (Figure
4). Note: Place the baery against the boom wall, and make sure the wires are placed along the side of the
baery and not under it.
To start the Inspector EXP, set the mode switch to the mode you want, and set the boom switch to On or
Audio. The Inspector EXP then begins a 6-second system check. All indicators and numbers are displayed. Aer
the system check, the radiaon level is displayed in the selected mode. Approximately 30 seconds aer you
start the Inspector EXP, a short beep indicates that enough informaon has been collected to ensure stascal
validity.
Units of Measurement
The Inspector EXP is designed for use of convenonal units; milliroentgens per hour (mR/hr) and counts per
minute (CPM) or SI units microsieverts per hour (µSv/hr) and counts per second (CPS). To switch between
convenonal or SI units choose UNITS in the Ulity Menu. For details, see Ulity Menu in Chapter 3.
Display Update
In the dose, rate, and count modes, the numeric display is updated every 3 seconds. In Timer mode, the
numeric display is updated every second.
Maximum level
When the maximum level for the current mode is reached, the Inspector EXP beeps for 3 seconds, pauses for
3 seconds, and repeats that paern. Also, the RANGE:Full icon is displayed and the numerical values displayed
will show OVER instead of the specic rate. The beeping paern and the ashing display connue unl the
level decreases or the Inspector EXP is turned o.
Response Time (Autoaveraging)
When the radiaon level is less than 6,000 CPM, the reading in any of the dose rate modes is based on the
radiaon detected in the previous 30 seconds. In order to give a quicker response to changes, when the
radiaon level exceeds 6,000 CPM in any 30 second period, the reading is based on the previous 6 seconds.
When the radiaon level exceeds 12,000 CPM in any 30-second period, the reading is based on the previous 3
seconds. Note: You can choose the 3 second response at any radiaon level by using the Ulity Menu detailed
in Chapter 3. Refer to the following table.
Aer 30 second start-up The reading will be based
if instrument is detecng on an average of the previous
(<100 CPS) 30 seconds
<6000 CPM or <1.75 mR/hr
(100 -200 CPS) 6 seconds
6000-12,000 CPM or 1.75-3.6 mR/hr
(>200 CPS) 3 seconds fast response
>12,000 CPM or >3.6 mR/hr