36
Calibrating the Sensors
6.4.4 Viewing Calibration History
1.
From the Main display, push the
RIGHT ARROW
key.
2.
Use the
LEFT ARROW
key to highlight CALIBRATION. Press
ENTER
.
3.
Use the
LEFT ARROW
key to highlight HISTORIC. Press
ENTER
.
6.4.5 Calibration-related Messages
Error:
∆
T OUT OF LIMITS
The temperature difference between the calibration and the theoretical sensor
response is greater than the authorized limit. Limits: ±20 °C.
Error: OUT OF 4/20 mA
The measured value is out of the programmed scale start and end range for
analog outputs 1 and 2 (
PROGRAMMING
/
mA OUTPUTS
/
OUTPUT 1
or
2
).
Timer Icon appears
When the S4 relay is used as a Timer, a countdown is displayed for the start of the
relay execution cycle. This countdown is expressed in hours:minutes, with the
exception of the last ten minutes, where it is expressed in hours:minutes:seconds.
Table 12 Viewing Calibration History
Parameters
DATE
xx/xx/xx
Date of the last calibration. The programmed date is not automatically updated.
P
x.xxx µA/ppm
Slope value
ZERO
x.xxx nA
Offset value
∆
T
x.x °C
Deviation between theoretical temperature (sensor curve) T
h
and measured temperature
History
DATE
xx/xx/xx
Date of calibration n–1
P
x.xxx nA/ppm
Value of slope n–1
DATE
xx/xx/xx
Date of calibration n–2
P
x.xxx nA/ppm
Value of slope n–2
T
m
:
∆
T
T
h
T
m
–
=
