Servomex 02500003E, Быстрый старт

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Servomex 2500 Quick Start Manual
2500 Series - Configuration and Operation 02500/003E/0 27
iii) Remotely, on demand. Remote contact closure by host device or remote user
switch will initiate one complete Auto calibration operation (a ‘ONE CYCLE’)
only; see installation manual for wiring. Contacts must be closed for at least 2
seconds but no more than 59 seconds.
iv) Remotely using digital communications if either Modbus over RS485 or Modbus
over Ethernet option is fitted. See installation manual for details.
The following parameters need to be set:
i) Zero only, or Zero plus Span routine - This choice depends on the nature of the
application, the ease of providing plumbed samples, and the degree of autonomy
required for the 2500.
ii) Zero sample concentration.
iii) Span sample concentration.
iv) Required Auto calibration period (time between cycles).
v) Start time/date of the first Auto calibration cycle.
vi) DV (dead volume) lag - This is the time to allow full flushing of the 2500's sample
cell before Auto calibration action occurs.
vii) Auto calibration mode or Auto checking only mode - This allows full
AUTOCALIBRATION (zero and span settings are adjusted) or AUTOCHECK
(zero and span settings are NOT adjusted, i.e. the analyser readings for zero
and span samples are simply compared with the given values)
viii) Zero and Span adjustment tolerances - This enables limits to be put on an
acceptable range of automatic adjustment for zero and span. Outside these
limits, an Auto calibration will fail and a Fault will be signalled (see Section 4.2).
ix) Unlock Zero and Span Adjustment Functions - This enables Manual and Auto
calibration routines to actually change the 2500's zero and span constants where
appropriate (see Section 3.11).