ORTEC Micro-Detective-HX, Operation Manual

Page: 32 / 96

ORTEC Micro-Detective
®
-HX Human Portable Radiation Detection System — Operation Manual
22
3.3.2. Turn the Cooler On
1. To turn the cooler on:
!
From the Home screen, press or tap the N button to display the Main Menu.
!
Press or tap N until Settings is highlighted, then press S.
!
Press or tap N until Advanced is highlighted, then press S.
!
Enter the password (default:
1122
) as described in Numerical Entries (page 7). The
password can be changed if you wish; see Section 3.3.6.
!
Navigate to Hardware and select it, then select Cooler On/Off. You should immediately
hear the cooler activate. Typically, the cooler is somewhat noisy for the first few minutes
of operation, then settles into a quiet hum.
!
Navigate to Back and select it, repeat until you return to the Main Menu, and select
Home.
2. Cooldown typically takes 12 hours, depending on the ambient temperature. If the ambient
temperature is
$
30
E
C (86
E
F), be sure to use the accompanying cooldown pad. If you wish,
you can monitor the cooling process by selecting Main Menu, Settings, Status (see
Section 3.3.3).
3. When the detector reaches operating temperature, the bias voltage will automatically turn on
and self-adjust to the proper setting. On the Home screen, acknowledge any outstanding error
alarms. The amber LED will stop flashing, the status message will read
Ready
, and the
Select button will now be active; see Fig. 18. The HX is now ready for first use. We strongly
recommend that you perform a background measurement, as discussed in Section 3.3.4.
3.3.3. Monitor the Detector and Cooler Status
The Status screen allows you to monitor 13 hardware parameters, including the detector bias
voltage, temperature, dead time, and gain stabilizer setting. Navigate to Settings, Status.
Figure 19 shows a typical status screen for an HX that is fully cooled and ready to use.
Users with password access can configure this screen to show either the actual parameter
readings, as shown here, or simply
OK/ERR
; see Displaying Simplified or Detailed Hardware
Status on page 30.