BEKA BA678C, Руководство пользователя, Страница: 21 / 27

8.3 Servicing
We recommend that faulty BA678C indicating
temperature transmitters are returned to BEKA
associates or to our local agent for repair.
8.4 Routine maintenance
The mechanical and electrical condition of the
transmitter should be regularly checked. Initially an
annual
inspection is recommended, but the
inspection frequency should be adjusted to suit the
environmental conditions.
8.5 Guarantee
Transmitters which fail within the guarantee period
should be returned to BEKA associates or our local
agent. It is helpful if a brief description of the fault
symptoms is provided.
8.6 Customer comments
BEKA associates is always pleased to receive
comments from customers about our products and
services. All communications are acknowledged and
whenever possible, suggestions are implemented.
9. ACCESSORIES
9.1 Scale marking
BA678C transmitters are fitted with a blank
escutcheon around the liquid crystal display.
If
specified when the instrument is ordered, this can be
supplied printed with units of measurement and a
scale for the horizontal bargraph.
9.2 Tag number
The BA678C can be supplied with a thermally printed
tag number on the rear panel adjacent to the
terminals.
9.3 Alarms
The BA678C can be supplied with two solid state
single pole alarm outputs that may be independently
programmed as high or low alarms with normally
open or normally closed outputs. Fig 8 illustrates the
conditions available and shows which are fail safe,
i.e. in the alarm condition the output is open.
WARNING
Alarms should not be used for critical
safety applications such as a shut down
system.
Fig 8 Alarm outputs
When an alarm is activated an annunciator appears
on the left hand side of the BA678C display. This
shows which alarm has been activated and will flash
if the alarm is delayed or silenced.
Programmable functions for each alarm include
adjustable setpoint, hysteresis, alarm delay and
alarm accept.
21