SICK TRANSIC Extractive TRANSIC151LP, Operating Instructions Manual, Page: 52 / 84

52 8015383/ZUQ7/V1-3/2020-06 | SICK O P E R A T I N G I N S T R U C T I O N S | TRANSIC151LP
Subject to change without notice
6
ADJUSTMENT
6.3.4 Two-point adjustment using the keypad (function CAL2)
The procedure is the same as for one-point calibration but the adjustment continues
automatically with the second reference point.
This adjustment calculates and sets new gain and offset parameter values. This process
uses one gas to adjust the lower limit value of the measuring range and another gas to
adjust the upper limit. These can be, for example, pure nitrogen (0.0% O
2
) and an N
2
/O
2
mixture (for example, 21% O
2
). The minimum difference between the two reference gas
concentrations in two-point adjustment should be at least 4% O
2
.
When adjustment conditions (gas pressure, humidity and CO
2
concentration) are different
from the operating conditions of the TRANSIC151LP, set the ambient parameters of the
TRANSIC151LP to the adjustment environment for the adjustment duration. These settings
must then be changed back to represent the process conditions when the TRANSIC151LP
is reinstalled in its operating environment. Further information on setting the ambient
parameters of the TRANSIC151LP,
see “Process pressure: Display and settings (APP)”,
page 37 and “H
2
0 content in the process gas (H2O)”, page 37 .
1
Check that no error messages are active.
Active error messages influence adjustment. Malfunction messages,
see “Display of
active and undeleted errors (ERR)”, page 36 (keypad). Error Table, see “Error Table”,
page 64 .
2
Select menu item Cal2 . This freezes the analog output.
3
First close off the gas for the first (lower limit) reference point.
4
Enter the known reference gas value and confirm with Ent .
5
The measured value display blinks.
6
Feed calibration gas.
7
Wait until the display shows a stable value.
8
Enter the known reference gas value and confirm with Ent .
9
Now close off the gas for the upper limit reference point.
10
Confirm with Ent . The display now shows Set hi. and the adjustment for the second
(upper) reference point starts and “Set Hi 10.0%” is displayed.
PASS is displayed when the adjustment is successful. The display now shows the O
2
value when no further input is made.
11
The TRANSIC151LP now calculates the new gain and offset settings and starts to
display the new measured result.
12
Press Ent twice. This ends the two-point adjustment.
Fig. 36: Two-point adjustment using the keypad
Ent Ent
Back Back k
<
<
<
<
Ent Ent
2 x
Back Back k
<
<
<
<
<
<
<
!
!
<
<
<
<
<
<
<
Up Up
Dn Dn
Up Up Ent Ent Dn Dn
<
<
Ent Ent
5 s
Ent Ent
5 s
Ent Ent
The adjustment can be aborted at any time with Back .