YOKOGAWA DPharp EJXC40A, Руководство пользователя

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<7. HART Communication>
7-5
IM 01C25W05-01EN
7.2.2.3 Unit
The unit is set at the factory before shipment if
specified at the time of order.
To check or change the unit, follow the procedure
below.
• Recalling the differential pressure unit parameter
(DP Unit)
Recall
parameters
[Root menu] → Detailed setup→
Sensors→ DP setup→ DP unit
Settings Available pressure units are shown
below.
inH
2
O@68degF
inHg
ftH
2
O@68degF
mmH
2
O@68degF
mmHg
psi
bar
mbar
g/cm
2
kg/cm 2
Pa
kPa
torr
atm
MPa
inH
2
O
mmH
2
O
ftH
2
O
hPa
• Recalling the module 1 side pressure unit
parameter (Pres 1 Unit)
Recall
parameters
[Root menu] → Detailed setup →
Sensors → Pres 1 setup → Pres 1 unit
Settings Refer to DP unit
• Recalling the module 2 side pressure unit
parameter (Pres 2 Unit)
Recall
parameters
[Root menu] → Detailed setup →
Sensors → Pres 2 setup→ Pres 2 unit
Settings Refer to DP unit
In addition, the unit of the process variable assigned
to PV can be recalled and set by following the
procedure below.
• Recalling and setting PV setting parameters
PV is Recall
parameters
(DTM)*
[Root menu] → Basic setup →
PV keypad input →
DP DP unit
Refer to DP unit
Pres 1 Pres 1 unit
Pres 2 Pres 2 unit
*: PV unit for DD.
NOTE
When using DTM to set range value and its
unit, an error message may appear to show the
inconsistency of significant figures.
In such case, set the unit first and then set the
range value.
7.2.2.4 Measuring Range
These range values are set as specified in the
order before the instrument is shipped. Follow the
procedure below to change the measuring range.
You can enter the low limit (LRV) and high limit
(URV) independently to set the measuring range.
To enter the low limit and high limit, follow the
procedure below.
• Recalling and setting differential pressure range
setting parameters (LRV/URV)
Recall
parameters
[Root menu] → Detailed setup →
Sensors → DP setup →
LRV Differential pressure range 0%
URV Differential pressure range 100%
• Recalling and setting module 1 side pressure
range setting parameters (Pres 1 LRV/Pres 1
URV)
Recall
parameters
[Root menu] → Detailed setup →
Sensors → Pres 1 setup→
Pres 1 LRV Module 1 side pressure range 0%
Pres 1 URV Module 1 side pressure range 100%
• Recalling and setting module 2 side pressure
range setting parameters (Pres 2 LRV/Pres 2
URV)
Recall
parameters
[Root menu] → Detailed setup →
Sensors → Pres 2 setup→
Pres 2 LRV Module 2 side pressure range 0%
Pres 2 URV Module 2 side pressure range 100%
In addition, the range of the device variable
assigned to PV can be recalled and set by following
the procedure below.
• Recalling and setting PV range setting
parameters
PV is Recall
parameters
(DTM)*
[Root menu] → Basic setup →
PV keypad input →
DP LRV Differential pressure range 0%
URV Differential pressure range
100%
Pres 1 Pres 1 LRV Module 1 side pressure range
0%
Pres 1 URV Module 1 side pressure range
100%
Pres 2 Pres 2 LRV Module 2 side pressure range
0%
Pres 2 URV Module 2 side pressure range
100%
*: PV LRV and PV URV for DD.