Siemens 7MB2041, Руководство по эксплуатации, Страница: 88 / 152

Operation
5.4 Operating functions
OXYMAT 64
86
Operating Instructions, 06/2008, A5E00880383-03
Function Necessary activation
voltage
Remark / effect
0 V 24 V 24 V
(min. 1 s)
Calibration gas N, X Note:
Effective activation only possible in "Measure"
operating state!
Relay must be configured for calibration gas. After
activation, the device changes from "Measure" to
"Calibration" operating state. See also "Example -
binary inputs"
Sample gas N, X Note:
Effective activation only possible in "Measure"
and "Calibration" operating states!
Relay must be configured for sample gas. Before
the sample gas valve opens, the other valves are
closed. The device then switches to the
"Measure" operating state, and all other states
(e.g. "Calibration") are left.
Zero calibration
Span calibration
N, X Activation initiates calibration. See also "Example
- binary inputs"
Autorange N, X Activate "Automatic measuring range switching"
Autocal check N, X Note:
Effective activation only possible in "Measure"
operating state!
Start Autocal check (function 24)
Measuring
protection
N, X It is possible to define a binary input "Measuring
protection" which has the following effect:
If the device is in the "Measure" operating state
(functional check deactivated), it remains in this
state, i.e.:
• The device can no longer be decoded.
• The device can no longer be set to "Remote".
The message "Measuring protection activated"
appears in the status line of the measured value
display.