Technical data

-19-
The final reset is only enabled after a zeropoint adjustment has been done with the sensor plugged in.
Menu point CLMAS – Adjustment of calibration gas concentration
The calibration gas concentration can be set within the range of 10 % – 105 % of the current
detection range, but never higher than 85 % LEL.
1. Use key
QUIT
MENU
to select menu point CLMAS .
2. The display reads the currently set value for the calibration gas concentration in % LEL (for
ammonia in Vol.%).
3. Use keys
ZERO
TEST
and
SPAN
INFO
to set the parameter.
4. Press key
QUIT
MENU
briefly to leave menu point CLMAS .
5. If necessary, store the parameter: Select menu point SAUE and confirm with
QUIT
MENU
.
Menu point A1, A2 – Adjustment of alarm thresholds (only visible at model CC28 DA)
The alarm thresholds can be set throughout the detection range; A1, however, cannot be set to a
higher value than A2. Setting a threshold to 0 de-activates the alarm. A2 can only be set to 0 when
A1 was also set to 0 before.
1. Activate menu point A1 resp. A2.
2. The display reads the presently set value for the alarm threshold.
3. Use keys
ZERO
TEST
and
SPAN
INFO
to set the parameters .
4. Press key
QUIT
MENU
briefly to leave menu point A1 resp. A2 .
5. If necessary, store the parameter (SAUE).
Notes:
The buzzer in model CC28 DA is always connected to alarm 2.
Menu point H1, H2 – Adjustment of hysteresis (only visible at model CC28 DA)
This function allows to adjust the hysteresis, i.e. the difference between activation and de-activation
of the alarm thresholds. The setting of the parameter is done in % LEL and is restricted to max. 5 %
LEL (for ammonia in Vol.%, max. 0.2 Vol.%).
Example:
At a CC28 with the detection range 0 .. 100 % LEL the hysteresis for alarm 1 was set to 4.0, i.e. the
alarm de-activation point for the alarm is 4 % LEL below the alarm threshold.
This results in the following alarm triggering:
Alarm 1
= 10 % LEL
Alarm activation
≥ 10 % LEL
Hysteresis H1
3 % LEL
Alarm de-activation
≤ 7 % LEL
1. Activate menu point H1 resp. H2.
2. The display reads the presently set value for the alarm hysteresis.
3. Use keys
ZERO
TEST
and
SPAN
INFO
to set the parameter.
4. Press key
QUIT
MENU
briefly to leave menu point H1 resp. H2 .
5. If necessary, store the parameter (SAUE).