M800 Gas Flow Computer - Spirax Sarco

6.7.2 Optional 4-20 mA outputs
Note: If a linear input type flowmeter is selected then these menus do not appear.
The sub-menus, 6.7.1.1 and 6.7.1.2 refer to the optional 4-20 mA outputs from the M800, which
can be fitted and configured for either retransmission of temperature or pressure. If these
optional outputs are not fitted then the relevant sub-menus will not appear.
Each output is configured in the same way and can either be set to give a 4-20 mA output of
pressure or temperature.
Check 4 mA
This allows the 4 mA value to be re-calibrated. A digital ammeter / multimeter should be
connected in series with the 4- 20 mA output. Pressing the right arrow button will
display OP = 4 mA and the M800 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' button confirms the setting.
Check 20 mA
This allows the 20 mA value to be re-calibrated. A digital ammeter / multimeter should be
connected in series with the 4- 20 mA output. Pressing the right arrow button will
display OP = 20 mA and the M800 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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IM-P333-25 MI Issue 2