CODEL
OPS. 141
8
Issue : A
Revision : 1
Date : 14/06/18
Doc i/d :
0141/6
050028
2.9. Outputs
Three forms of output are provided :
•
two selectable current outputs (normally 4 to 20mA). Maximum
load is 500
.
•
single pole changeover relays for :
two alarm relays triggering at a threshold set in the signal
processor.
data valid indication, operating under power failure and any
equipment fault condition - see the Basic Fault section for
further details.
2.10. Normalising Inputs
The dust measurement may be normalised to standard conditions. Normalising
data can be brought into the instrument in one of two ways :
•
entering a fixed value via the keypad.
•
using the 4 to 20mA output from pressure, oxygen and
temperature transducers (Model 1001 only).
!
Normalisation data is only required if the instrument is being used
as a dust monitor.
2.11. Cable Requirements
Cable requirements from the customer are as follows :
•
Current Loop Output :
Any suitable 2-core cable. Maximum
length depends upon keeping output load within the 500
maximum load requirement.
