METROTEC
12
In the 0 to 20 mA configuration this is at 10 mA, in the 4 to 20 mA configuration this is at 12
mA.
An adjustment should be made only, if the following conditions are met:
1.
The sensor must have reached operating temperature
2.
The sensor must have been flushed with clean air
The adjustment is made by pressing "T3" for PLUS and "T4" for MINUS.
Pressing "T1" again switches the left LED array to the next stage. See Table 2, Figure 3.
The measuring module has now switched the measured value to the measuring output. If
required, the measuring output will be set to the expected measured value. An adjustment
should be made only, if the following conditions are met:
3.
The sensor must have reached operating temperature
4.
The sensor must have been flushed with a known sample gas or test gas.
The adjustment is made by pressing "T3" for PLUS and "T4" for MINUS. The continued
pressing of the buttons accelerates the steps while the LED is flashing.
When finished, the setting is saved by pressing "T2" which also serves to leave the setup
menu. All LEDs in the left array are off. See Table 1, Figure 1.
7.3
Adjusting the Limit Value
The limit value is switched when the current measured value exceeds the current limit value.
Usually the limit value is within the programmed measuring range. An alarm status is
signalled at the bottom of the right LED array. See Table 1, Figure 2. At the same time the
semiconductor relay, which is connected to the terminals 10 and 11 of the terminal strip,
switches.
The approval for changing the setting will be started by pressing "T1" until the bottom LED
of the left LED array lights up. See Table 2, Figure 2. The measuring module has now
transformed the limit value into a measured value and connected it with the measuring output.
The new adjustment is made by pressing "T3" for PLUS and "T4" for MINUS. The continued
pressing of the buttons accelerates the steps while the LED is flashing.
When finished, the setting is saved by pressing "T2" while the setup menu is exited at the
same time. All LEDs in the left array are off. See Table 1, Figure 1.
