gefran HMF Series Instruction Manual page 19

LRV Rerange (7, 1)
This function is the pressure at which the transmitter will display a 4 mA output as entered directly by the ope-
rator. LRV variation affects the transmitter span so the range is restricted by the minimum span value found in
fast key (1, 3, 4, 3).
URV Rerange (8, 1)
This is the pressure at which the transmitter will display a 20 mA output as entered directly by the operator.
This range is restricted by the minimum span value found in fast key (1, 3, 4, 3).
LRV Rerange by applying a known pressure (1, 2, 6, 1, 2)
Such a function is performed by applying a known pressure and starting the procedure in order to set the 4mA
point according to the pressure reference value.
Note: Such an operation should be carried out with a calibrated pressure source only.
URV Rerange by applying a known pressure (1, 2, 6, 1, 2)
Such a function is performed by applying a known pressure and starting the procedure in order to set the 20mA
point according to the pressure reference value.
Note: Such an operation should be carried out with a calibrated pressure source only.
Device Variable Trim reset (1, 2, 6, 4)
This function is used to restore the Zero, Lower, and Upper Trim to the factory setting values.
R-Cal (1, 2, 6, 5)
Activating R-Cal, the output will be fixed to the percentage of span fixed by such function.
80% is default value.
Damping (1, 3, 6)
The damping time constant affects the speed with which the output signal reacts to changes in pressure as
shown in the figure on the next page.
By default damping is off, but values between 0 and 30 seconds can be fixed using the handheld communicator.
Only one decimal digit is allowed.
See also specific notes on response time in Functional Safety Notes (chapter 10)
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80636B_MAN_HMF - HWF_05-2022_ENG