GE Masoneilan 12420 Instruction Manual & Safety Manual page 31

d. High Level [SPAN]
d1. Liquid application:
Attach to the torque arm a set of weights equivalent to the apparent weight of the displacer fully immersed in the
calibration fluid with Specific Gravity of Calibration [SG CALIB], i.e.:
d2. Interface application
Attach to the torque arm a set of weights equivalent to the displacer weight completely immersed in the liquid of
Higher Specific Gravity used for calibration [HSG CALIB] using the following formula:
d3. Enter and validate the [SPAN]: the [LEVEL:%] value indicated on the display must equal 100.0%. If not, restart the
procedure until very close to this value. See Appendix B.
e. Press the * button when [SAVE] is displayed to validate the [ZERO] and [SPAN] settings.
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Displacer Apparent Weight for REF H =
Displacer Actual Weight - (Displacer Actual Volume X [SG CALIB])
i.e. 1362 – 907 x 1 = 455 g for a standard displacer and water
Displacer Apparent Weight for REF H =
Displacer Actual Weight - (Displacer Actual Volume X [HSG CALIB])
Masoneilan 12400 Series Transmitter/Controller Instruction Manual | 29