Measurement; Tcbo Interval; Selecting Tcbo Interval; Span & Offset - Siemens SIREC D Handbuch

4.8 MEASUREMENT

This menu item allows you to program items directly
affecting measurement of Inputs. The following
programming options
Measurement Menu:
•
TCBO Interval - Allows you to change the
Thermocouple Burn Out (TCBO) check time
interval. This is how often the recorder checks
whether or not there is an open circuit on a
thermocouple input by injecting a small current
onto the input.
•
Span & Offset - Allows you to turn Span and
Offset off or on for RTDs and Thermocouples.
•
Demo Mode - Allows you to turn on the Demo
mode using internally generated signals

4.8.1 TCBO Interval.

defining the TCBO check time interval. Disabling
TCBO is accomplished by setting the TCBO Interval
to zero seconds. The default value is 300 seconds
(5 minutes).
1. Selecting TCBO Interval - From the Measure-
ment menu, use the UP (↑) or DOWN (↓) Arrow
Key to highlight "Tcbo intervl" and press ENTER.
The display will read "seconds
2. Programming TCBO Interval - Use the Nu-
meric keypad to enter the TCBO interval in sec-
onds up to a maximum of 600. When the desired
interval is displayed, press ENTER and the dis-
play returns to the "Tcbo intervl" prompt in the
Measurement Setup Menu.
4.8.2 Span & Offset.
Span and Offset compensation to allow for
correction of known inaccuracies in Thermocouples
and RTD's.
1. Selecting Span & Offset - From Measurement
menu, use the UP (↑) or DOWN (↓) Arrow Keys to
highlight "Span&offset" and press ENTER. The
display will read
"spnofs=YES".
2. Enabling Span & Offset - Press the YES to
change the display to "spnofs=YES". Press
ENTER
and the
"Span&offset" menu prompt. Span & Offset are
enabled.
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are available in
This function allows
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This function enables
either "spnofs=NO"
display returns to
3. Disabling Span & Offset- Press the NO key to
change the display to "spnofs=NO". Press ENTER
and the display returns to the "Span&offset" menu
prompt. Span & Offset are disabled.
the
If enabled, a SPAN and OFFSET compen-
sation menu item will be displayed in the
POINT SETUP menu for Thermocouples
and RTDs.

4.8.3 Demo Mode.

to put the Recorder in the Demo Mode of operation.
In the Demo Mode, live inputs are ignored and
calculated
waveforms.
1. Selecting Demo Mode of Operation - At the
"Demo control" prompt, press ENTER and the
display reads either "Demo = YES" or "Demo =
NO".
2. If needed, change the current setting using the
keypad then press ENTER. The Demo mode is
suited to the 1 volt scale. It is advisable to set up a
demo mode then save the configuration to disk.
This can be loaded anytime the demo mode is re-
quired.
In the Demo Mode of operation, the Re-
corder ignores all live inputs and uses an
internal generator for external or calculated
points.
3. Deselecting Demo Mode of Operation - At
the "Demo control" prompt, press ENTER and the
display reads either "Demo=YES" or "Demo=NO".
or
4. Use the YES or NO keys to select the Demo
mode ON or OFF and press ENTER. The display
will return to the "Demo control" prompt. Powering
the unit OFF loses the Demo mode.
the
NOTE
Demo Mode allows you
points use internally
NOTE
Programming
generated
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