PD8-6262 Explosion-Proof Dual Analog Input Flow Rate/Totalizer
Instruction Manual
39
Calibrating the Totalizer with
External Source
To scale the totalizer without a signal source, refer
to
Scaling the Totalizer without a Signal Source
on page
The totalizer can be calibrated to display the process
variables in engineering units by applying the
appropriate input signal and following the calibration
procedure.
The use of a calibrated signal source is strongly
recommended to calibrate the totalizer.
Warm up the totalizer for at least 15 minutes before
performing calibration to ensure specified
accuracy.
Calibrating the Totalizer for
Channel A (
CAL-A
)
Note:
Inputs for the above example are:
Input 1: 4.00 mA; Display 1: 0.0 Gallons
Input 2: 20.00 mA; Display 2: 5000.0 Gallons
Calibrating the Totalizer for
Channel B (
CAL-B
)
Note:
Inputs for the above example are:
Input 1: 4.00 mA; Display 1: 0.0 Gallons
Input 2: 20.00 mA; Display 2: 18000.0 Gallons
Total & Grand Total Setup (
tsetup
)
The time base and total conversion factor, and grand
total conversion factor for input channels A and B are
located in the
Totalizer Setup
menu.
The time base is based on the rate of flow. Total &
grand total conversion factors for channel A and B are
programmed independently. The total and grand total
have their own independent settings. This means that
one can be displaying the value in gallons while the
other displays in million gallons, liters, m
3
, etc.
Total & Grand Total Reset
Total reset menus are located in the
Program
menu.
The totals can be programmed for manual or
automatic reset. In the automatic reset mode, a
programmable time delay is available to reset the total
or grand total after the assigned preset is reached.
The totals can also be reset via the front panel button,
via a switch across the F4 terminal, digital inputs, or
via a Modbus command.
Password Protected and
Non-Resettable Total
The total and grand total can be password-protected
to prevent unauthorized resets. The grand total can
be programmed as a non-resettable total, see
Reset Password &
Non-Resettable Total
on page
