Dresser Model 10C25 Series K Installation, Operation, and Maintenance Manual
© 2018 Natural Gas Solutions North America, LLC
Page 46 of 74
13
Testing Procedure
Test accuracy of the 10C25 meter by using industry accepted methods: prover testing (including sonic
nozzle, bell, and transfer provers), optical scanner testing, and differential rate testing.
•
Prover Testing
A prover cable is available for testing the meter using the same IrDA (infrared) interface that is used
for communicating with the meter. The prover cable allows for rapidly testing compensated and
non-compensated accuracy on the Dresser Model 5 prover and the Honeywell SNAP® Proving Systems
(contact the Factory for compatibility with other systems).
•
Optical Scanner Testing
A white Flow Indicator allows for testing the non-compensated accuracy by using an optical scanner.
•
Differential Rate Testing
The differential rate test is unique to rotary meters and is an accurate and convenient method of
determining the meter’s condition by comparing the meter’s performance to previous or original
performance records. Differential testing is accepted by many state regulatory agencies as a means of
periodically substantiating that the original accuracy of a meter has not changed. The 10C25 meter
provides upstream and downstream ports for differential testing as well as the capability of displaying
the gas flow rate on the LCD screen.
13.1
Prover Test Mode Configuration
This section details how to configure the meter for prover test mode. If you are able to scroll to an LCD
screen stating
PROV C.V
(for compensated testing) or
PROV NC.V
(for non-compensated testing), the
meter is already configured for prover testing. For more information about performing these tasks in the
Dresser MeterWare software, refer to the
Dresser MeterWare Software Manual
.
If the meter is already configured for testing, skip the steps in this section.
Perform the following steps to configure the meter for prover test mode in the Dresser MeterWare
software:
1.
Connect the IrDA cable from the
computer to the meter, and then
connect the meter with
MeterWare (refer to Appendix A).
Figure 58: Connect with the meter