Siemens 7MB2335, Руководство по эксплуатации, Страница: 84 / 168

Operation
5-34
Operating instructions ULTRAMAT 23 gas analyzer
C79000-B5276-C216-03
Table 5-2 Analog current output for start-of-scale values
selectable Analog current (neg. on) Analog current (neg. off)
0 - 20 mA 0 mA 0 mA
2 - 20 mA 2 mA 2 mA
4 - 20 mA 4 mA 4 mA
NAMUR - 20 mA 4 mA 4 mA
Table 5-3 Analog output current for downward limiting of measured
value
selectable Analog current (neg. on) Analog current (neg. off)
0 - 20 mA 0.0 mA 0.0 mA
2 - 20 mA 0.0 mA 2.0 mA
4 - 20 mA 0.0 mA 4.0 mA
NAMUR - 20 mA 3.8 mA 4.0 mA
Table 5-4 Analog output current for upward limiting of measured value
selectable Analog current (neg. on) Analog current (neg. off)
0 - 20 mA 21.0 mA 21.0 mA
2 - 20 mA 21.0 mA 21.0 mA
4 - 20 mA 21.0 mA 21.0 mA
NAMUR - 20 mA 20.5 mA 20.5 mA
1) if measuring range 2 is set to the maximum possible value, the limiting
value of range 2 ... 20 mA is at 20.9 mA and of range 4 ... 20 mA at
20.8 mA.
S
Analog output during FCTRL (analog output during function
control)
The following measured value outputs are possible with the
AUTOCAL procedure, in warm-up mode and in the uncoded state:
Hold: The value measured directly prior to commencement is
output unchanged. This also applies to the limits which are
output (see section 5.9.2)
Actual: The measured value is continuously updated.
Zero: see following table:
Analog output during
function control
Meas. value: hold
51011b