Device Setup
January 2023
•
Rev. 0
• Standard Devices User Manual
26
Totalizer Limit
There are 4 options for how the totalizer reacts when it
reaches its limit:
• Zero and Set OVR:
Totalizer resets to zero and
continues once the maximum count is reached.
The
OVR
status message is active to indicate
maximum count has been reached (
).
• Set to Zero:
Totalizer resets and continues
counting from zero once the maximum count
is reached. No error status is displayed.
• Hold and Set OVR:
Totalizer stops counting
at max count until it is reset manually. Displays
OVR
status message to indicate maximum
count has been reached (
• Hold:
Totalizer stops counting at max count until
it is reset manually. No error is displayed.
The totalizer also calculates the minimum time the totalizer will
run before it reaches the totalizer limit. Once all the settings
have been confirmed, selecting
Min Time to Limit
shows
how long the totalizer can run at full flow before the limit is
reached. Increasing the number of digits and moving the
decimal to the right will increase this time.
The elapsed time counter has a maximum value of 9999:59:59
(h:m:s) (416 days, 16 hours). If flow is still being totalized at that
point, the timer freezes, regardless of the options chosen for
the totalized flow readings.
Totalizer Display
MENU
→
SETUP
→
Sensor
→
Totalizer
→
Totalizer 1
or
Totalizer 2
→
Display
Totalizers have 3 options to display on the main screen.
• Flow and Batch (Default):
View as described above
with options for batching, flow averaging, and setpoint.
• Detailed Flow:
Similar to Flow and Batch but
without batching. Provides information focuses
more on flow rates, total flow, and average flow.
• Multi-variable:
Screen that resembles
the main display (
).
Totalizer Digital Data
MENU
→
SETUP
→
Sensor
→
Totalizer
→
Totalizer 1
or
Totalizer 2
→
Digital Data
This setting enables the device to report the totalizer value
whenever it is polled by the serial terminal (
). There
are two options available.
• None:
The totalizer value is not displayed
when the device is polled.
• Volume:
The totalizer reports the current value of
the totalized volume when the device is pulled.
Restore Totalizer Value on Power-up
MENU
→
SETUP
→
Sensor
→
Totalizer
→
Power Up Restore
Turning this option on sets the device to retain the totalized
value between power cycles. The device continues to count
from its previous totalized amount when power is restored.
If this setting is off, the totalizer resets when the device is
powered off.
Totalizer while Controlling Pressure
While using a mass flow or liquid controller to control pressure,
the flow rate may exceed the maximum measurable flow (128%
of full scale) with an abrupt pressure change. In this case, the
totalized value flashes and the
TMF
error appears. The
TMF
error indicates that the totalizer missed flow data. Reset the
totalizer to clear the error message.
Setting an upper flow limit (
) within the readable
range prevents this error, but the flow limit would be given
preference over reaching the pressure setpoint.
!
Warning:
In certain situations, it is possible to exceed
the batch size when controlling pressure. As an
example, if the feed pressure is too low to achieve the
flow setpoint and then pressure suddenly increases,
the batch size may exceeded its limit before the
valve reacts to the sudden burst of pressure.
Batches
Mass Flow and Liquid Controllers
BATCH
or
MENU
→
CONTROL
→
Batch 1
or
Batch 2
Batching is only possible when a totalizer is enabled and
works in concert with the setpoint. For more information on
batching flow, see the batch section on
Totalizer
Multivariable
view
.
Totalizer
Detailed Flow
view.
Totalizer
Flow and Batch
view.
