Siemens SITRANS FUS1020, Руководство пользователя, Страница: 160 / 251

6-38
1020NFM-1D Section 6
6.6.8 TOTALIZER MODE
The Totalizer function operates in any of the modes listed below:
NOTE: NETFLOW (default) is best for applications where there may be zero flow for long
periods. It minimizes false Totalizer register increments due to data scatter. Press the
<Down Arrow> to accept the default setting.
To select a Totalizer Mode:
To access the [Totalizer Mode] option list press the <Right Arrow>.
Move the cursor to the required Totalizer mode by pressing the <Up/Down Arrow>.
To store selection press <ENTER>.
6.6.9 BATCH/SAMPLE TOTAL
The meter maintains a separate totalizer register for Batching or Sampling applications. Unlike the
Flow Total registers, you cannot access this register directly. It is used for relay control only. If you
assign the system relay to this function, a momentary (200 mS) relay pulse occurs whenever the
BATCHTOT register accumulates a specified liquid quantity. You enter the total flow volume required
to activate the relay, in the [Batch/Sample Total] menu cell. The numeric entry must reflect the se-
lected flow total units. The [Totalizer Display Scaling] menu cell shows the applicable flow total units.
The sign of the Batch/Sample Total determines positive or negative accumulations.
NOTE: The Batch/Sample total relay requires the same consideration for exceeding the maxi-
mum pulse rate as the TOTCNT relay (see paragraph 6.6.7 Total Resolution).
To enter a Batch/Sample Volume:
To activate numeric entry press the <Right Arrow>.
Use PC numeric keys or KeyPad to enter the desired Batch/Sample TOT accumulation.
To store data press <ENTER>.
6.6.10 RESET TOTALIZER
Use this function to set all 1020 totalizer registers, including the overflow register, to zero. For details,
see your model’s installation drawings. Full totalizer control over these registers is also obtainable
with a PC using the menu access facility (see Totalizer Controls).
6.7 THE DATA SPAN/SET/CAL MENU
This menu becomes available after picking a Meter Type and Measurement Channel. However, some
functions will only be active after the transducers are installed and operating properly. Use the [Data
Span/Set/Cal] menu to set the range for analog outputs and setpoints for Alarm relay outputs. Addition-
ally, the [Calibrate Flow Rate] menu allows you to apply external adjustments to the meter’s intrinsic
primary outputs.
MODE FLOW DIRECTION NOTES
POSFLOW positive flow Accumulates flow in positive direction only.
NEGFLOW negative flow Accumulates flow in reverse direction only.
NETFLOW positive or negative Adds to positive total; subtracts from reverse total.