Thermo Scientific TVA-1000B Instruction Manual - Geotech ...

MI 611-185 – June 1996
Display Menus
Alarm Type
Low Ceiling:
High Ceiling:
STEL:
Description
This alarm is a warning that a lowest level threshold has been exceeded.
Once acknowledged, the letter L appears to the right of the live measurement
for the appropriate detector.
This alarm is a warning that a second, higher level, threshold has been
exceeded. Once this alarm is acknowledged, the letter H appears to the
right of the live measurement for the appropriate detector.
The Short Term Exposure Limit alarm indicates that measurements averaged
over a 15-minute interval have exceeded the set alarm limit. Once
this alarm is acknowledged, the letter S appears to the right of the live
measurement for the appropriate detector.
The three alarm messages appear on the instrument display as follows:
Low Ceiling High Ceiling STEL Level
ALARM!====
Low ceiling
alarm exceeded!
Exit=Clr
ALARM!====
High ceiling
alarm exceeded!
Exit=Clr
=ALARM!====
STEL alarm level
exceeded!
Exit=Clr
NOTE: To display and change the alarm menus, the instrument must be ON but
does not have to be warmed up.
Accessing the Alarm Menu
1. From the MAIN menu display, press 2=Setup.
2. From the SETUP menu display, press 2=Alarms and follow the procedures for the
appropriate alarm settings:
STEL Level Alarm
1. From the ALARM LEVELS display, press 1=STEL. The previous alarm settings
for STEL alarm are then displayed, as follows.
FID-only PID-only PID/FID
FID: 80.00 ppm
STEL Alarm
Enter=New Value
PID: 80.00 ppm
STEL Alarm
Enter=New Value
PID: 80.00 ppm
FID: 80.00 ppm
STEL: 1=Both
2=PID 3=FID
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