Use Of The Green Keys - Pv - Process Value - ABB 691HT Operating Instructions Manual

For 600T, 600T EN and Deltapi K
Pressure Transmitters
P V : 1 2 3 4 . 5 6 m b a r
O U T P U T : 1 2 . 3 4
S T AT S N S R
P R E S T E M P
S T A T I C : 1 . 2 3 4
M P a
S T E M P : 2 3 . 4
D e g . C
N O T P R O C E S S
For Temperature Transmitters
P V : 1 2 3 .4 5 D e g. C
O U T P U T : 1 2 . 3 4
TEMP SNSR SNSR
ERAT 1 2
CJC Temperature :
2 0 . 5 D e g . C
For Generic HART device
P V : 1 2 3 .4 5 D e g. C
O U T P U T : 1 2 . 3 4
SV TV QV
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USE OF THE GREEN KEYS - PV - PROCESS VALUE

The green key PV ( Process Value ) allows the user to monitor the process
T
value and the current output of the transmitter. The process value appears
m A
in user configured engineering units while the output current is in
milliamps.
Monitoring of other transmitter measured value is possible by the use of
T
labelled function keys and is different depending on the transmitter type:
the first three displays are related to pressure transmitters while the
remaining are for temperature transmitters.
T
The indication "NOT PROCESS TEMP" reminds that the displayed
temperature cannot be considered as the process temperature being the
T E M P
temperature reads in the sensor's core.
For the temperature transmitters the initial display shows the process
T
value in the user configured engineering units and the output value in
m A
milliamps. The secondary displays change depending upon the type of
the sensor element ( thermocouple, resistance thermometer, variable
resistor or mV generator ) and single or differential measurement.
For thermocouple and mV measurement pressing the F1 key the CJC
temperature is displayed ( as shown ), while for other types of measure-
ment the electronics internal temperature is displayed.
The F2 and F3 keys can be used only for differential measurement to
display the measured value of the two sensors expressed in the same
units than the process value. If used for other types of measurement an
error message will be displayed: VALID ONLY FOR DIFFERENTIAL T/C.
If the Communicator is connected with a generic smart HART transmitter
T
the PV green key will operate in a similar way to display the process variables
m A
in the following order:
PV:
OUTPUT:
F1, F2 and F3 are used respectively to display secondary (SV), tertiary (TV)
and fouth (QV) variables.
for primary variable
for analog output current