Servomex SERVOTOUGH Oxy, Руководство оператора

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01910001B_8 © Servomex Group Limited. 2020
11
• Fault condi�on
0 mA or 21.5 mA †
•
Under range # < 4 mA
Switched Inputs
•
Input Voltage and Current $ 12 to 24 Vdc; 5 to 15 mA
• Minimum opera�ng �me
~
0.5 seconds (Momentary Inputs)
•
Maximum opera�ng �me ~ Infinite
Signal/milliamp/RS485 output terminals suitable for:
•
Flexible conductors
0.5 to 1.5 mm
2
(20 to 16 AWG)
• Solid conductors
0.5 to 1.5 mm
2
(20 to 16 AWG)
*
The
analyser is supplied configured for opera�on with one of these voltage ranges. You must
specify the voltage range when you order the analyser
.
‡ The relay output signals are volt
-
free signals.
†
User selectable.
# Only available when the 4 to 20 mA output range is selected.
$ Switch contacts should be suitable for low current switching.
~
For Ini�ate and Stop of
Auto
valida�on, Autocalibra�on, Calibrate Low and Calibrate High, a
momentary input of 0.5 seconds or longer is required, i.e. momentary push buton switch. To ac�vate
and deac�vate Service in Progress, a latching ac�on switch is required.
2.4
Sample gas
The
analyser is not suitable for use with oxygen enriched sample gases, that is gases
over 21% O
2
, rela�ve to atmospheric pressure.
The
analyser is not suitable for use with sample vent back pressures that cause
pressurisa�on at the sample vent of 124 kPa (18 psia).
The
analyser will be damaged if condensa�on is allowed to form within the
measurement cell or pipe work. It is important that the sample gas dew points
specified below are maintained at all �mes.