34
a
b
Figure 54. How to enter in Alarms page (a -b).
2.
Insert the Gas Deviation by scrolling the bar (1 in Figure 55) or pressing the
+/-
icons.
Note
►
The Gas Deviation value defines the tolerance from the Setpoint.
Note
►
The gas deviation value range is 0.1-2.0 %.
3.
Insert the
Gas Time
by scrolling the bar (2 in Figure 55) or pressing the
+/-
icons.
Note
►
The Gas Time value defines the time for which the CO2 composition may remain outside the allowed
tolerance before CO2-UNIT-BL triggers an alarm.
Note
►
The alarm time range is 5-20 minutes.
4.
Press
Save
(3 in Figure 55) to confirm.
1
2
3
Figure 55. How to set the Deviation and Time Alarm.
In this example the following settings are displayed (valid only after the system has reached
its stationary state): if the
Gas Deviation
from Setpoint is 0.5% or greater (i.e. if Setpoint gas is 5.0% and the
composition reaches a value equal or less than 4.5% or equal or more than 5.5%) for a period of time equal or
longer than 10 minutes (
Gas Time
set in this example) then the system triggers an Alarm.
Tip
►
After any change in the Setpoint value the device enters into a transient regime.
9.2.2.6
Data Logging
CO2-UNIT-BL touch screen interface, OKO-TOUCH (see Figure 2), is equipped with on-board memory for
data logging and storage. A simple routine allows downloading data to USB drive or to PC.
In order to log and then download the logged data, connect a USB drive (not supplied) to OKO-TOUCH,
using MINI-USB-OTG cable (provided), as shown in Figure 56.
