User manual

T38.0.0X.6C-03 Page 6 of 7
7. Configuration
In the configuration the device parameters can be changed.
The jumper has be set, p.r.t. figure right-hand side. To set or
remove jumper, the housing cover has to be removed.
Ex works the jumper is set.
To change parameters press “SET” (Taste 1) four seconds, than
the parameters selection is started with the first parameter
(display shows “dA.Lo”).
By pressing “SET” the desired parameter is selected, the editing of
the parameter values happens via key
▲ (key 3) or ▼ (key 2).
Pressing “SET” again (after editing the parameter values) returns
to the parameter selection.
Pressing “SET” again after the last parameter finishes the
configuration, stores the changes and the instrument returns to the
normal mode.
7.1 Description of configuration parameter:
a) 'dA.Lo': Display at zero output (output scaling)
Enter the display value at which the output should have 4mA (or 0V).
b) 'dA.Hi': Display at maximum output (output scaling)
Enter the value at which the output should have 20mA (or 1 / 10V).
c) 'DA.Er': Preferred state of output
Display
Preferred state of the
analog output
Annotation
Lo
In case of failure inactive Output signal = <3,7 mA or 0 V
Hi
In case of failure active Output signal = >23 mA or >10.5 V (or >1.1 V)
d) 'AL.Hi': Upper boundary of alarm
At Al.Hi the boundary is set from which max. alarm will be given.
Selectable range: ‚AL.Lo‘ ... 2001
e) 'AL.Lo': Lower boundary of alarm
At Al.Lo the boundary is set from which min. alarm will be given.
Selectable range: -1 ... ‚AL.Hi‘
f) 'A.dEL': Alarm delay
The value at A.dEL declares the alarm delay in minutes.
g) 'OFFS': Offset of CO
2
-measuring
The offset of the measuring will be shifted by this value, the input is in ppm. (calculation: see by scale)
Selectable range: -200 ... +200 ppm or “oFF”: offset is deactivated (0 = ex works)
h) 'SCAL': Scale correction of CO
2
-measuring
The scale of the measuring is changed by this value.
Selectable range: -10.00...+10.00 or “oFF”: scale is deactivated (0 = ex works)
The adjusting by offset and scale is intended to be used to compensate deviations of the measuring.
It is recommended to keep the scale correction deactivated (“oFF”). The display value is given by
following formula:
CO2-display = measured value – offset
With a scale correction the formula changes:
CO2 display = (meas. value - offset) * (1 + scale correction/100)
If the jumper is removed from the shown
contacts, the configuration is
inaccessible, values are protected.
Jumper