IM-P337- 6 9 EMM Issue 2
47
7.5.1.1 4-20 mA Output sub-menu
The 4-20 mA sub-menu allows re-ranging and re-calibrating of the 4-20 mA output.
If heat metering and 'POWER' are selected, the 4-20mA output will give the net power in MWh or MBtu.
7.5.1.2 SORCE
This changes the source data for the 4-20 mA between FLOW and POWER.
7.5.1.3 SEt4 mA
set as 4 mA is 0 and the maximum is the 20 mA equivalent value less one.
7.5.1.4 SEt20 mA
This sets the value for the flowrate or power, which is equivalent to 20 mA. The minimum value that can
be set as 20 mA is the 4 mA equivalent value plus one and the maximum is the meters rated maximum
at 32 bar g. The 20 mA value must always be a minimum of one greater than the 4 mA value.
will need to be changed to LARGE to entre the desired value. See 7.3.3.
7.5.1.5 CHECK 4 mA
This allows the 4 mA value to be re-calibrated. A digital volt meter/multimeter should be connected to the
"LOOP TEST" terminals. See section 5.2 Testing the 4-20mA Output. Pressing the right arrow button will
display OP = 4 mA and the MVT10 will output a steady 4 mA. If the multimeter does not read 4 mA the up
and down arrow buttons can be pressed to alter this current until 4 mA exactly is indicated. Pressing the 'OK'
7.5.1.6 CHECK 20 mA
This allows the 20 mA value to be re-calibrated. A digital volt meter/multimeter should be connected to the
"LOOP TEST" terminals. See section 5.2 Testing the 4-20mA Output. Pressing the right arrow button will
display OP = 20 mA and the MVT10 will output a steady 20 mA. If the multimeter does not read 20 mA the
up and down arrow buttons can be pressed to alter this current until 20 mA exactly is indicated. Pressing
the 'OK' button confirms the setting.
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