5
Timer Switch (Figure 2 (4))
Off.
The timer is not operating.
Set.
The length of the timed period can now be set using the “+” and
“-” buttons. If the timer is already operating, the display shows the time remaining in the timed period.
On.
The timer is operating, and the display shows the total counts accumulated so far in the timed period.
Set Button (Figure 2 (5))
The Set button is used to set the alert, select items in the Utility Menu, and set the Calibration settings. See “Using
the Alert” and “Utility Menu” in Chapter 3 and “Calibration” in Chapter 5.
+ and - Buttons (Figure 2 (6))
The “+” and “-” buttons are used to adjust the numeric display for timed counts, alert settings, and calibration settings.
See “Taking a Timed Count” and “Setting the Alert” in Chapter 3 and “Calibration” in Chapter 5.
The “+” and “-” buttons can also be used to make selections in the “Utility Menu”. For details, see “Utility Menu” in
Chapter 3.
The Detector
CAUTION:
The mica surface of the Geiger tube is fragile. Be careful not to let anything penetrate the screen.
Internal- For Inspector
+
only
The Inspector
+
uses a two-inch Geiger tube, commonly called a “pancake tube.” On the back of the Inspector
+
, the screen
is called the window. See Figure 4. It allows alpha and low-energy beta and gamma radiation, which cannot get through
the plastic case, to penetrate the mica surface of the tube. The small
radiation symbol (Figure 1 (7))
on the front label
indicates the center of the Geiger tube .
External - For Inspector EXP
+
only
The Inspector EXP
+
has an external pancake probe instead of the built-in detector. To connect the detector, plug one end
of the cable into the connector on the end panel and the other end to the probe.
Caution:
If the probe is not connected
when turning the instrument on, the instrument will not function properly and may cause damage.
Do no remove the
probe while the instrument is on.
The Input/Output Ports
The
Cal Input (Figure 1 (9))
port is used for calibrating electronically using a pulse generator. For details, see “Calibrating
Electronically” in Chapter 5.
The
Output (Figure 1 (10)
port below the Cal Input jack allows you to interface the Inspector
+
to a computer, data logger,
or other device. For details, see “Interfacing to an External Device” in Chapter 3.
The
probe port
on the end panel is for attaching the external probe. (present on Inspector EXP
+
only)
3 Operation
Units of Measurement
The Inspector
+
is designed for use of conventional units (milliroentgens per hour and counts per minute) or SI units
(microsieverts per hour and counts per second). To switch between conventional or SI units choose Option 2 in the Utility
Menu. For details, see “Utility Menu” in Chapter 3.
GM Detector
Window
Battery
Compartment
Figure 4
Inspector
+
Rear View (Detector)
Содержание Inspector EXP+
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