7. MAINTENANCE
7.1 Fault finding during commissioning
If an indicator fails to function during commissioning
the following procedure should be followed:
Symptom
Cause
Solution
No display
Incorrect wiring
Check wiring
There should be 0.6 to
1.2V between
terminals 1 & 3 with
terminal 1 positive.
With an optional loop
powered backlight,
there should be 3.4 to
5V between terminals
3 & 12 with terminal 12
positive.
No display
0V between
terminals 1 & 3.
Incorrect wiring
or no power
supply.
Check supply voltage
and voltage drop
caused by all the
instruments in the
loop.
All decimal points
flashing.
Underrange if
–ve sign
displayed or
overrange.
Recalibrate the
numerical display.
Unstable display
4/20mA input is
noisy.
Reduce ripple on
4/20mA power supply
and/or decrease
indicator resolution.
Unable to enter
configuration
menu.
Incorrect
security code
entered.
Enter correct security
code, or contact BEKA
if the code has been
lost.
7.2 Fault finding after commissioning
ENSURE PLANT SAFETY BEFORE
STARTING MAINTENANCE
If an indicator fails after it has been functioning
correctly follow the procedure shown in section 7.1. If
this does not reveal the cause of the fault, it is
recommended that the instrument is replaced. This
can be done without disconnecting power, but while
the indicator is disconnected the 4/20mA loop will be
open circuit.
7.3 Servicing
All BA507E-SS and BA527E-SS loop powered
indicators are interchangeable if the required
optional backlight and alarms are fitted. A single
spare instrument may quickly be recalibrated to
replace any instrument that is damaged or fails.
No attempt should be made to repair instruments
at component level.
We recommend that faulty instruments
are returned to BEKA associates or to
your local BEKA agent for repair.
7.4 Routine maintenance
The mechanical and electrical condition of the
instrument should be regularly checked. Initially
annual inspections are recommended, but the
inspection frequency should be adjusted to suit the
environmental conditions.
7.5 Guarantee
Indicators which fail within the guarantee period
should be returned to BEKA associates or your
local agent. It is helpful if a brief description of the
fault symptoms is provided.
7.6 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.
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