4. INSTALLATION
4.1 Location
The A90-SS panel meter has a rugged stainless
steel case with a 10mm thick toughened glass
window. The case provides 7J and the window 4J
front of panel impact protection. The captive
silicone gasket, which seals the joint between the
instrument and the panel enclosure, ensures IP66
front of panel ingress protection. The instrument
has IP20 rear protection.
Although the front of the meter has IP66 protection,
it should be shielded from continuous direct
sunlight and severe weather conditions
The meter may be installed in any panel providing
that the operating temperature is between –40ºC
and +55ºC.
Fig 6 shows the overall dimensions of the
instrument together with the recommended panel
cut-out dimensions to achieve an IP66 seal
between the instrument enclosure and the
instrument panel.
4.2 A90-SS earthing
The A90-SS panel meter complies with the Low
Voltage Directive 2014/35/EU and has the
following isolation between circuits:
AC powered model supply input
3kV rms
DC powered model supply input
1.5kV
Alarm contacts
4kV rms
All other circuits
500V rms
The A90-SS stainless steel enclosure is totally
isolated from the meter circuits but for personnel
safety should be earthed. This can be achieved
via the earth terminal on the meter power supply
plug, or via the M4 earth stud on the rear panel of
the meter.
Fig 6 show the overall dimensions of the indicators
together with the recommended panel enclosure
cut-out dimensions.
Fig 6 A90-SS meter dimensions and terminals
Panel wiring should be supported to prevent
vibration causing damage to the wiring or
terminals.
4.3 EMC
The A90-SS panel meter complies with the
requirements of the European EMC Directive
2014/30/EU. For specified immunity all signal
wiring should be screened with the screens
earthed at one point. Voltage and current input
wiring should be in twisted pairs.
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Summary of Contents for Advisor A90-SS
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