MAS2600: Testing and Recalibration Reference Manual
August 2023 RM 6000-01-001-24
41
Testing
Caution! Please observe that testing and recalibration of transmitters mounted in haz-
ardous areas shall be carried out by Ex qualified personnel.
Before dispatch, the MAS2600 transmitter is calibrated in accordance with the require-
ments specified in the order.
The transducer and the amplifier are calibrated together and must, therefore, always be
used together.
A programmable measuring range transmitter will in conditions of no pressure (empty
tank) give an output signal of 4 mA, and in conditions of maximum pressure an output sig-
nal of 20 mA.
The transmitter should be tested by applying to the transducer a known pressure from a
calibrator and reading the equivalent milliamp signal on a milliamp meter.
The above-mentioned applies to the gauge transmitter only. For absolute transmitters the
output signal will be higher than 4 mA, because it is calibrated for 4 mA at 0.8 bar abs. The
output signal will typically be 5-7.5 mA in atmospheric pressure, depending on the trans-
ducer range and the actual atmospheric pressure. Maximum output signal 20 mA, will be
at the transducers absolute range.
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