Simtronics GD10-P00 - 5 Operation; Analogue Output and HART Interface

GD10P User Manual Page 19 of 44 850-811250-Rev.06b
5 OPERATION
5.1 Analogue Output Protocol
Gas reading and fault signals are given through the 4-20mA current loop interface. The table
below shows the analogue output level for the various conditions.
Condition
Analogue output
Comment
Normal gas reading
4 mA - 20 mA
4 mA = 0% of range
20 mA = 100% of range (or higher)
Early Dirty Optics Warning
(55% signal reduction)
2 mA
(*)
Detector will still output gas concentration
if it is greater than 7 % of range (FS)
Dirty Optics Warning
(70% signal reduction)
1 mA
(*)
No detection
Detector Fault
< 0,5 mA
(*)
No detection
(*)
Shows default factory settings. Can be configured via HART® terminal
5.2 HART® Interface
5.2.1 Introduction
Simtronics GD10P detector supports HART® version 7.
For proper operation between GD10P and the HART® communicator, a dedicated Device
Descriptor (DD) should be loaded onto the communicator. If such DD is not present, the
communicator will offer a proprietary generic interface, and the list of available functions may
be limited and variable.
The proper DD for GD10P can be downloaded from HART® Foundation website
www.hartcomm.org (select “Technologies” then click on « HART Product Registry & EDD
Database » or contact us). The loading of the DD onto a specific communicator must be done
according to the relevant user guide for that communicator.
DD has no relevance for earlier versions of GD10 (the generic HART® devices).
Customers having such detector should use generic codes as described in Appendix
1 on page 39.