4-42
1010GCNFM-3C
Section 4
Maximum span values represent: Minimum span values represent:
100% of span 0% of span
Current output of 20 mA Current output of 4 mA
Voltage output of 10 Vdc Voltage output of 0 Vdc
PGEN
The [PGEN P/Unit Volume] menu cell entry controls a digital output pulse function and is available in
Custody Transfer units only (designated by a “C” in their part number). It allows the assigning of PGEN
digital signal pulses per unit of volume. For example, 1000 output pulses per cubic foot of gas.
NOTE: The unit of volume is determined by the Volume Units initially selected from the [Total
Volume Units] menu cell option list (refer to paragraph 4.6.6).
To assign PGEN output pulses:
From the [Span Data] menu press
From the [PGEN P/Unit Volume] menu cell, press to activate the numeric entry.
Use the numeric keys to enter the desired number of PGEN pulses per unit volume.
To store the data press
ENT
Max Flow
The [Max Flow] menu cell stores the maximum range for the flow rate output (Vfo). It can be a positive
or negative value. Enter the data using the flow rate units you selected. This entry also spans the un-
signed flow variable (Vfab) as noted above.
FUG1010GCCDN (Expanded 1010N-7 I/O Module)
Installation Drawing 1010N-7-7 (Sheet 3 of 3)
(Ultra Performance Flowmeters)
PIN# SIGNAL FUNCTION NOTES
9 PG1 PRIMARY FREQUENCY OUTPUT / OPEN COLLECTOR Digitally Synthesized
10 PG2 PRIMARY FREQUENCY OUTPUT / TTL Pulse Waveform
11 PG3 QUADRATURE FREQUENCY OUTPUT / OPEN COLLECTOR
12 PG4 QUADRATURE FREQUENCY OUTPUT / TTL
TB2
Vs is the sonic velocity in meters-per-second (m/s) of the flowing gas.
The min. and max. Vs entries establish the Vs span. Max Vs (m/s) defines
100% of span. The Min Vs (m/s) defines 0% of span.
Vs
Spanned gas
sonic velocity:
Vsg
spanned gas
specific gravity:
Vsg is the inferred operating specific gravity of the gas. The min. and
max. Vsg entries establish the Vsg span. Max Vsg defines 100% of span
and Min Vsg defines 0% span.
(continued)
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