Dwyer DPW User Manual
Page 20
Command
Name
Pilot
Totalizer
Low Flow
Cut Off
Fluid Density
Units
Maintenance
Timer
Pulse
Measure
Interval
Flow
Measure
Mode
Description
Sets and controls action of the
Pilot flow totalizer.
NOTE:
Pilot Totalizer reading is stored in
SRAM (volatile) memory. Power
cycle will reset Pilot Totalizer
reading to zero.
Display /Change Meter Low Flow
Cut Off settings in % FS.
Display /Change Meter Low Flow
Cut Off settings in % FS.
Set the units of measure for gas
flow and totalizer reading.
Note: The units of the totalizer
output are not per unit time.
For user defined units: k-factor
value represents conversion value
from L/min.
Time base argument:
S – seconds
M – minutes
H – hours
Density argument:
Y – use density
N – do not use density
Hours since last time unit was
calibrated.
Note: Has to be reset to zero after
calibration.
Display/change meter pulse
measure interval settings.
Note: Pulse measure interval has
to be in the range: 500 mS ≤ MI ≤
60000 mS
Display/change meter flow
measuring mode
Following measurement modes are
supported:
W - Pulse width
C - Number of pulses per measure
interval
No.
10
11
12
13
14
15
16
Command
PT
CO
FD
U
C
I
MM
Argument 1
Z (reset to zero)
F(start totalizer at
flow % FS)
L (limit gas volume
in current E.U.)
D (disable
totalizer)*
E (enable totalizer)
R (read current
totalizer volume)
S (setting status)
(0 to 10.0%)
No Argument
(Returns current
cut off value
settings)
(New Density
Value) 0.01 ≤
Density ≤ 5.0 g/cm
3
No Argument
(Returns Current
Density in g/cm
3
)
% (% FS)*
mL/sec
mL/min
mL/hr
L/sec
L/min
L/hr
m
3
/sec
m
3
/min
m
3
/hr
ft
3
/sec
ft
3
/min
ft
3
/hr
g/sec
g/min
g/hr
kg/sec
kg/min
kg/hr
Lb/sec
Lb/min
Lb/hr
Gl/sec
Gl/min
Gl/hr
t/sec
t/min
t/hr
USER
(user defined)
No Argument
(status)
R (read timer)
Z (set timer to
zero)
No Argument
(Returns current MI
settings in mS)
W - Pulse Width*
C - # of Pulses
No Argument
(Returns Current
settings)
Argument 2
%FS)
volume)
Argument 3
Argument 4
Response
PTZ
PTF:
PTL:
PT:D
PT:E
PTR:
(in current EU)
PTS: Mode, Start, Limit
CO:
Example: CO:2:0
CO:
Example: CO:2:0
FD:
FD:
Example: FD:1.000
U:%
U:mL/sec
U:mL/min
U:mL/hr
U:L/sec
U:L/min
U:L/hr
U:m
3
/sec
U:m
3
/min
U:m
3
/hr
U:ft
3
/sec
U:ft
3
/min
U:ft
3
/hr
U:g/sec
U:g/min
U:g/hr
U:kg/sec
U:kg/min
U:kg/hr
U:Lb/sec
U:Lb/min
U:Lb/hr
U:Gl/sec
U:Gl/min
U:Gl/hr
U:t/sec
U:t/min
U:t/hr
U:USER,
U,
CR:
CZ
I:
Example: I:2000
I:
Example: I:2000
MM:
Example: MM:W
MM:
Example: MM:W
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