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

MI 611-185 – June 1996
Display Menus
The ACCEPTED message appears for a short time and is then replaced by the
normal CALIBRATION menu.
When the ACCEPTED message disappears and the CALIBRATION menu
appears, the ZERO reference value is stored. This value is stored in non-volatile
memory until the next calibration is performed. The date and time of this calibration
are stored and can be accessed through the INFO menu.
NOTE: For optimum accuracy, re-zero the FID every time the hydrogen supply valve
is turned on.
Span Reference Point(s)
To set the span reference point, execute the procedure described below. Note that the
procedure is the same as that for setting the zero reference except that a span gas is
used instead of a zero gas. The procedure is:
1. From the CALIBRATION MENU display, press 4=Span.
NOTES:
1. The following sequence shows the procedure when the TVA-1000B is configured
with both Cal mode and Cal Save mode = Auto. If either mode is Manual, an extra
confirmation is required at the appropriate step.
2. If your instrument is a dual detector type (PID and FID), you can set the span reference
for the PID and FID separately, both together, or one in one type of calibration
gas and one in another type of gas. To do so, follow the same procedure.
3. If multiple span points are used, repeat the following procedure for each and every
span point.
When you press 4=Span, the display will show:
FID-only PID-only PID/FID
FID 7654321
Span P+1 (Up/Dn)
Enter=New Calib
PID 7654321
Span P+1 (Up/Dn)
Enter=New Calib
PID 7654321
FID 7654321
Span Pt1 (Up/Dn)
1==Both 2Pid 3Fid
If more than one reference span gas concentration has been configured, pressing
the Up/Dn keys will allow you to scroll through all defined reference gas concentration
points.
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