Union Instruments CWD2005 SPC, Original Operating Instructions

Page: 78 / 110

Operation
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Range cfg. is a binary coding for the measurement conditions while a measuring
range switchover is in process.
-1 measuring range not loaded
1 nozzle set 2 or nozzle set 1
2 air nozzle on or off
4 flammable carrier gas on or off
8 not flammable carrier gas (oxygen) on or off
16 flammable carrier gas that does not burn by itself on or off
The number 6 indicates that the measuring range is operated with nozzle set 1 and
a flammable carrier gas with an air nozzle.
The number 2 indicates that nozzle 1 has an air nozzle.
Calibr. gas indicates the number of the calibration gas for the measuring range.
The upper nozzle set has number 1, the lower nozzle set the number 2.
No. indicates switchover point 1 and 2.
Signal indicates the physical unit of the measurement value.
Unit indicates the switchover point in the specified dimension between the meas-
uring ranges. In the example, the first measuring range is switched over at 650
+5% kcal/m3.
Switch (%) indicates the overlap of the measuring ranges in %. In the example,
the hysteresis is 5 %.
Measuring range switchover can be done automatically or manually. If manual
measuring range switchover is set, an additional menu item appears under Num-
ber 6.2.1.3.9. Change range. Here you do the manual switchover to another meas-
uring range.
•
non
•
automatic
•
manual
The time constant of the burner is a factor determined for every burner. Sewage
gas burners have another factor than burners for natural gas. Every burner type
has its own coefficient.
Max temp of inner pipe is a switch-off temperature if in case of a fault highly
calorific gas flows to a too large nozzle and generates a significant over-tempera-
ture.