Basic Principles Of Installation; Requirements Of The Measurement Location; Safety Requirements Of The Electrical Installation - Xylem YSI Alyza IQ PO4 Operation Manual

Alyza IQ PO4
Controlled
ambient
conditions
ba76201d03
3.3

Basic principles of installation

3.3.1 Requirements of the measurement location

The measurement location must meet the environmental conditions specified in
section 7.3 General data,  160.
Work on the open instrument (e.g. during mounting, installation, maintenance)
may only be carried out under controlled environmental conditions:
Temperature range
Relative air humidity
If the Alyza IQ is already in operation, the temperature of the measuring unit
must be adapted to the ambient temperature prior to opening the measuring
unit. The temperature adaptation is done with the function Öffnen der Messein-
heit vorbereiten. As soon as the measuring unit is ready to be opened, this is
displayed in the Status tab. The status LED of the measuring unit lights up white.
NOTE
The interior of the measuring unit is temperature-controlled to 20 °C (68 °F).
With ambient temperatures over 25 °C (77 °F) , condensation water may devel-
op on the cool surfaces and cause damage when the measuring unit is opened.
To avoid damage of the measuring unit due to the formation of condensation
water, always wait for the temperature adjustment (function Öffnen der Messein-
heit vorbereiten) to be completed before opening the measuring unit.

3.3.2 Safety requirements of the electrical installation

The safety of the system into which the instrument is integrated is the responsi-
bility of the builder of the system.
Electrical equipment (e.g. motors, contactors, cables, lines, relays, switches, in-
struments) must meet the following requirements:
 Compliance with national regulations (e.g. NEC, VDE and IEC)
 Suitability for the electrical conditions at the place of installation
– Maximum operational voltage
– Maximum operational current
 Suitability for the ambient conditions at the place of installation
– Temperature resistance (minimum and maximum temperature)
– Stability against UV light in the case of outdoor usage
– Protection against water and dust (Nema or IP type of protection).
 Suitable fuse protection of the electrical circuit
– Overcurrent protection devices
05/2020
+ 5 ... + 40 °C (+ 41 ... +104 °F)
≤ 80 %
Commissioning
27