8 temperature functions (basic or detailed setup), 9 velocity functions (detailed setup), 9 velocity functions (detailed setup) -86 – Yokogawa RotaMASS 3-Series User Manual
Page 158
7. pArAMETEr dESCrIpTION
7-86
IM 01R04B04-00E-E 8th edition March 01, 2011 -00
All Rights Reserved. Copyright © 2003, Rota Yokogawa
7.8 Temperature functions (Basic or detailed Setup)
Temperature
To set the functions of temperature measurement.
Notice: Standard range: -200 to 230°C
High temp. range (/HT): 0 to 400°C
Temperature Unit
Select:
degC, degF, K
Temperature format
Select:
xxxxxxx, xxxxx.X, xxxx.XX, xxx.XXX, xx.XXXX, x.XXXXX
Temperature lrv
(low range value)
Set a temperature value to the 4 mA or 0 Hz
Temperature Urv
(upper range value)
Set a temperature value to the 20 mA or xxxxx Hz.
Abs(URV-LRV) ≥ 10K
Temperature damping
Set the
damping time in s. Damping time affects outputs and display.
After 5 times damping time the given value is displayed (t=63%).
Temperature alm 1 sel
Select:
No function, More than, less than
Temperature alm 1 crit
Select a
temperature alarm level.
What happens in case of an alarm has to be defined in Status out (7.12,
7.13).
Temperature alm 2 sel
Select:
No function, More than, less than
Temperature alm 2 crit
Restrictions:
All alarms have to be in 0-110%
of URV-LRV Alarm criteria 2
must always be larger than alarm
criteria 1.
Select a
temperature alarm level.
What happens in case of an alarm has to be defined in Status out (7.12,
7.13).
Temperature fix val select
Select:
Inhibit, Enable
Temperature fixed value
Select a temperature value in case of malfunction of the built in
temperature sensor.
Temperature gain
The ROTAMASS temperature sensor is installed outside of the measuring
tubes. So at high or low fluid temperature the temperature measurement
may show a deviation as a function of the quality of heat insulation. This
function allows correcting temperature measurement for better accuracy
in mass flow and density.
Note: It is not recommended to use this function unless correct
measurement over the complete process temperature range can be
confirmed. It is not sufficient to proof correct measurement at one
temperature or in a very narrow temperature range unless the process
operates exclusively within this range.
7.9 velocity functions (detailed Setup)
velocity
To set the function of the medium velocity.
Not available for gas measurement (/GA)
velocity unit
Select:
m/s, ft/s