5.3.3 Starting Pushbutton proving
The basic operation of the Pushbutton Proving mode is as follows:
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The prover dongle receives uncorrected or temperature corrected volume in the form of infrared
light pulses from EC350.
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The prover dongle converts the received infrared light pulses to electronic switch closure pulses
that can be handled directly by the supplied prover.
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These electronic switch closure pulses are sent to the prover. Each electronic switch closure pulses
represents either one (1), ten (10), or one hundred (100) cubic feet of gas volume, depending upon
the model of the rotary meter.
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When EC350 is in Meter Proving mode, the volume pulse inputs from the meter are read at a much
higher resolution than what is normally processed. This allows the most rapid proving cycle time for
a given accuracy. Most proving runs can be accomplished within 60 seconds.
Attention: When EC350 is in Pushbutton Proving mode, the IrDA Serial communications are
disabled. Before you enter the Pushbutton Proving mode, ensure that the prover dongle is
connected to EC350.
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Entering Pushbutton Proving mode
5.3.3.1 Entering Pushbutton Proving mode
To enter Pushbutton Proving mode:
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Unlock the keypad and type the PASSCODE to enter level 3 mode. Refer to the section â level 3
modeâ for accessing level 3 mode. By default, in level 3 mode the following appears on the display.
MAIN MENU
ALARMS
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Using the UP arrow and DOWN arrow scroll through the options in level 3 mode until MTR
PROVER appears.
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Press OK. The following appears on the display.
UC
IDIAL RATE
This represents the current meter Dial Rate for uncorrected volume.
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Press and hold OK for five seconds. The following message appears on the LCD.
PROVE
UC
5 Key features
5.3 îMeter proving
Honeywell 2024
81
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