Filter
Top Products
1/99 SMV 3000 Transmitter User’s Manual 85
7.4 Using Transmitter to Simulate PV Input, Continued
Procedure, continued
Table 21 Using SMV Transmitter in the Input Mode, Continued
Step Action
5
Select DPInCal tab card and type in desired PV1 input value that is to
be simulated. Value should be within LRV and URV settings for PV1.
6
Write input to simulate input for PV1.
7
Repeat Steps 5 and 6 if you want to simultaneously simulate another
PV input, by selecting the appropriate tab cards.
• APInCal, (for PV2)
• TempInCal, (for PV3) or
• FlowInCal, (for PV4)
8
Select PV Monitor from the View pull down menu to open the PV
Monitor window and read PV4 FLOW output and verify PV input.
Record the output value and compare it with expected results. See
NOTE below.
If output is not as expected, check range and PV4 configuration data,
and change as required.
9
Clear input mode for all PVs in input mode.
10
Select Status tab card to verify that all transmitter inputs are in not in
input mode and that there are no new messages.
NOTE: For SMV models SMG170, (which uses gauge pressure as PV2 input),
you must measure the absolute static pressure and then enter that
value in the Atmospheric Offset field of the GPConf tab card.
Internally, the SMV transmitter uses absolute pressure values for all
flow calculations. The value entered in the Atmospheric Offset field is
added to the gauge pressure input value to approximate the absolute
pressure. An inaccurate atmospheric pressure offset value will result
in a small error of the flow calculation.
Use an absolute pressure gauge to measure the correct atmospheric
pressure. A standard barometer may not give an accurate absolute
pressure reading