Ampcontrol gasguard, Инструкция по установке, эксплуатации и обслуживанию

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GASGUARD IS CONTROLLER Issue: R2, Date: 26/09/2011, CRN: 7502
Page 16
Decimal Point
Each Input channel may have its display reading configured to correctly indicate the process value.
The available settings for decimal places are:-
•
nnnn (e.g. 2500)
•
nnn (e.g. 250)
•
nn.n (e.g. 25.0)
• n.nn (e.g. 2.50)
Full Scale Reading
Input process signals to the controller are typically in the range 4 – 20mA and as such may represent a variety of
actual process scaling. To set the relationship between 4-20mA input and the process scaling, the channel full scale
value may be set. Settings are per digit, with up to four digits available. The displayed value of this setting will
depend on the decimal place setting.
The maximum value that may be set is to be 9999 (999 / 99.9 / 9.99 depending on decimal point position)
Units
The process displayed readings can be given units of measurement indicator. There are ten pre-set unit types
available for selection, namely:-
• %v/v (percent volume per volume)
• ppm (parts per million)
•
LEL (Lower Explosive Limit)
•
% (percent)
•
V (volts)
•
mV (millivolts)
•
rpm (revolutions per minute)
•
Hz (cycles per second)
•
kHz (thousands of cycles per second)
• m/s (meters per second)
Tag
A channel may be given an identification name that provides meaningful representation of its purpose/function within
a system. The tag input is entered as a 9 character name consisting of the following characters:-
•
Symbols: blank * - + .
•
Numeric: 0 – 9
•
Alpha A-Z (uppercase only)