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Model 5 Prover Software Manual
5.5 Test Volume
Refer to Configuring Tests for additional information on selecting proper values for the Test Volume.
Test Volume is the test parameter that determines what quantity of air passes through a meter during
testing. For a given Flow Rate, the larger the value for the Test Volume, the longer the test's duration.
All tests should last for a minimum of 30 seconds.
To change the Test Volume, click on the black arrow on the right-hand side of the box to display the drop
down menu. Select from the default values, or choose “Other” to manually enter the Test Volume into the box
immediately to the right. You can type in the new Test Volume, or click on the up/down arrow button to
change the number displayed. Press <Enter> once the appropriate value has been selected.
You can enter an unlimited number of test points during each test configuration. On the Set Prover Options
screen, you may enable the Test Volume Selection for each Flow Rate option (See 4. Setting Prover Options
on page 11). The software will then allow you to enter or select a separate Test Volume for each Flow Rate
that is used. If you disable that option, only the first Test Volume selection/entry will be used for each Flow
Rate. The Volume will default to the Test Volume entry but can be changed by entering anew value.
As in the "Other" option for the Drive Rate/Pulses Per Test selection, it is possible to type an invalid
value. You must select a proper or valid value. You should never select a test volume that equals a
partial revolution on ID meters. This will most likely result in erroneous proofs.
5.6 Base Pressure Correction
If you choose PC or PCTC for meter output, the box labeled “Pres. Corr. Factor” will appear. Manually enter
the Fixed Pressure Correction Factor.
For accessory units which include a fixed pressure factor, the Model 5 Prover can account for this only
if you multiply the calculated Pulses/Test by the fixed pressure factor value. You must use this product
as the value for the Pulses/Test entered during a test configuration.
5.7 Flow Rate
Enter the desired Flow Rate for each test on the Flow Rate section of the table at the bottom of the
Configure-Run Meter Test screen.
Flow rates must be in descending order. Start with the highest and end with the lowest.
You will receive an error message if there is a typed value not within the expected range for the current test
and Prover configuration settings. This message will indicate the valid range and proper units that may be
entered. Pressing an invalid key will clear the entry field and display a zero.
A single decimal point is optional when typing the values for Flow Rate. If you enter zero for a Flow Rate,
the test will not be configured or run.
You can run up to three tests for each Flow Rate value. A value of '0' in the repeat column will yield one test
with no repeats; a value of '2' will yield one test with two repeats.
If the Test Volume Selection for Each Flow Rate Option is enabled (See 4.1.4), the volume will default to the
initial setting
but can be changed. Ensure that the Test Volume and Flow Rate settings are such that test
duration is a minimum of 30 seconds.
Important:
The Flow Rate(s) should not exceed the maximum rated Flow Rate for the Field Meter.
