Instruction Manual
748441-D
April 2002
Rosemount Analytical Inc. A Division of Emerson Process Management Operation 3-13
Model CAT100
3-5 MANUAL CALIBRATION
a. Zeroing
Zeroing will set the actual measured
gas concentration to “zero.”
Activate the FUNCTION pad until the
display shows:
Or
(Zeroing channel 1 or channel 2)
Activate the ENTER pad and the pass-
word code entry screen will appear. Us-
ing the INPUT-CONTROL pad, enter
the correct password code and activate
ENTER. The display will now show:
Or
(The actual zero level)
Wait at least the entered flushing time
and t90 time. Then activate the ENTER
pad. The display will now show:
Or
(The nominal value)
If the actual and nominal values agree,
zero calibration is not necessary and
the next function can be selected using
the FUNCTION pad.
If the actual and nominal values dis-
agree, activate the ENTER pad and the
display will show:
Or
(The actual measuring value)
To start the zeroing process, activate
ENTER again. As soon as the zeroing
has finished, the display shows:
Or
(The actual measuring value)
The touch pad will only be released af-
ter another flushing period and t90
time. The analog output signals and the
concentration limits are also released if
Hold = 1.
To leave the calibration mode, activate
FUNCTION.
b. Spanning
Spanning will set the actually measured
gas concentration to the entered span
gas set point. Verification of the span
calibration is essential for accurate
concentration measurement. Spanning
can only be performed after performing
or verifying the zero.
Activate the FUNCTION pad until the
display shows:
Or
(Spanning channel 1 or channel 2)
Activate the ENTER pad and enter the
correct password code if not already
entered. The display will now show:
Or
(The actual concentration level)