KROHNE VFM 1091 - Manual (Page 23)

Fct. 1.3.2 RANGE P Pulse output range value
Pulse output is 0 Hz for 0 flow rate and a value (P
100%
) equal to Q
100%
* RANGE P value.
Example of pulses/unit volume or mass
Full scale setting, Q
100%
: 1000 Litre/hr (set via Fct. 1.1.2)
RANGE P : 1PULS/Litre (set via Fct. 1.3.2)
at 1000 litres per hour : 1000 pulses per hour would be the pulse output.
For limits on programming of RANGE P refer to Sect. 6.
Fct.1.3.3 PULS. WIDTH pulse width
This is used to limit the active duration of the Pulse output, to 250mSec and thereforc
reduce the overheating of external electromechanical totalizers coil.
For details refer to Sect. 6.
TESTING OF PULSE OUTPUT P
Fct.2.3 TEST P can be used to check Pulse output. The Pulse output may be set to ON or OFF state. This may be monitored with the help of a
voltmeter connected across the pulse output which is wired to a power supply & load in series. The normal pulse output function is restored
automatically [as per programming of Pulse output] when the measurement mode is resumed.
6.2.10 Coding desired for entry into programming mode
Fct. 3.2.1 ENTRY. CODE.1 set to YES for enabling Code l.
The entry code consists of 9 keystrokes of the 3 keys as follows
Programming of the VFM 1091(I) is "off-line" meaning that the instrument stops making measurements when it is in the programming mode. This
means VFM 1091(I) will keep totaliser value and Current/Pulse output as per the last value output before entering the programming mode.
6.2.11 Behavior of outputs during programming
6.2.12 Hart programmability
VFM 1091(I) supports all the Universal commands and the Common practice commands which are applicable to the meter.
The HART
® compatibility of VFM 1091(I) program functions is tabulated below. For functions which are HART ® programmable, corresponding
Generic On-line Menu (GOM) step of HART ® Communicator is also given. Details of Generic On- line menu is given in 6.2.14.
PROGRAMMING FUNCTION HART HHC MENU
PROGRAMMABILITY
FST 1.0 OPERATION
FCT. 1.1.0 BASIS.PARAM
FCT. 1.1.1 MEAS.INST YES GOM 1,2,3
FCT.1.1.2 MAX. FLOW YES GOM 1,3,2
FCT 1.1.3 MIN. FLOW YES GOM 1,3,3
FCT. 1.1.4 TIME CONST YES GOM 1,3,6
FCT. 1.2.0 DISPLAY
FCT 1.2.1 FLOW UNITS YES GOM 1,3,2
FCT 1.2.2 TOTAL UNITS
TO
FCT. 1.2.6 CYCLE DISP NO
FCT 1.3.1.0 PULS.OUTP NO
FCT. 1.3.1 FUNCTION P
TO
FCT. 1.3.3 PULS. WIDTH NO
FCT 2.0 TEST
FCT. 2.1 TEST DISP NO
FCT 2.2 TEST 1 YES GOM 1,2,2
FCT 2.3 TEST P. NO
FCT 1.1. MEAS.INST YES
FCT 3.0 INSTALL NO **
Notes:
* GOM 1,3,2 is used to set the primary sensor unit. When primary sensor unit is changed, device automatically updates the MEAS.INST. As an
example, if the unit is changed to Kg/hr, then MEAS.INST will be set to MASS.
** Fct 3.0 install menu contains the device specific set up.
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