Function group
CURRENT OUTPUT
FULL SCALE 2
Description of function → see function “FULL SCALE 1” (page 49)
Note!
This function is only available if the “DUAL RANGE MODE” function is
activated (see page 50).
ACTIVE RANGE
Display of the actual full scale value (if the dual range mode is active):
FULL SCALE 1
– FULL SCALE 2
TIME CONSTANT
Selecting the time constant determines whether the current output signal
reacts quickly (small time constant) to rapidly fluctuating flow or delayed
(long time constant).
Note!
The time constant does not influence the behaviour of the display.
6
max. 3-digit number with floating decimal point: 0.01...100 s
Factory setting:
1.0 s
CURRENT SPAN
Selection of the current range 0/4...20 mA. The current for the scaled full scale
value (100%) is always 20 mA. A choice can be made between the current
output corresponding to NAMUR recommendations (max. 20.5 mA) or the
current output with maximum 25 mA.
Note!
The “0–20 mA” current output can only be selected if the HART protocol is
inactivated (see page 69).
6
0–20 mA (25 mA) → maximum 25 mA
4–20 mA (25 mA) → maximum 25 mA
0–20 mA → maximum 20.5 mA (NAMUR)
4–20 mA
→ maximum 20.5 mA (NAMUR)
FAILSAFE MODE
In cases of an instrument error it is advisable for safety reasons that the current
output assumes a previously defined status which can be set in this function.
The setting chosen only affects the current output. Other outputs or the display
(e.g. totalizer) are not affected.
6
MIN. CURRENT
When a fault occurs (or with EPD) the current
signal is set to the following value:
for 0–20 mA → 0 mA
for 4–20 mA → 2 mA
MAX. CURRENT When a fault occurs (or with EPD) the current
signal is set to the following value:
for 0/4–20 mA (25 mA) → 25 mA
for 0/4–20 mA → 22 mA
HOLD VALUE Last valid measured value is held.
ACTUAL VALUE Normal measured output despite fault.
Note!
Note!
Note!
Promag 33 6 Description of Functions
Endress+Hauser 51
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