Operation—4–20 ma/hart, 1 output configuration (continued) – Hach-Lange SI792 C, SI792x C, SI792x C-FF, SI792x C-PA User Manual User Manual
Page 37
Operation—4–20 mA/HART
35
Note: During configuration the instrument/transmitter remains on Hold.
Depending on the configuration the loop current is frozen at its last
value or at a preset fixed value.
Press
ENTER
to access a menu item. Use the
ARROW KEYS
to edit
values. Press
ENTER
to save the settings. If a value is outside of the
Select characteristic (Linear / Logarithmic curve)
o1.CHAR
1
LIN (default)
Linear/Logarithmic curve
LOG
Specify the value for the 4 and 20 mA signals
o1. 4mA
000.0 mS
LIN: Enter current start
o1.20mA
000.0 mS
LIN: Enter current end
o1. 4mA
1 mS (default)
LOG: Enter current start
o1.20mA
100 mS (default)
LOG: Enter current end
Set time averaging filter for reducing noise
o1.FtME
0 SEC (default)
Time constant of output filter (refer to
for more information)
Select a 22 mA signal during errors
o1.FAIL
ON
OFF (default)
Signal behavior during HOLD
o1.HOLD
LAST (default)
During HOLD the last measured value is
maintained at the output
FIX
During HOLD a value (to be entered) is
maintained at the output
Specify the value to output during HOLD periods
o1.FIX
021.0 mA (default)
During HOLD the entered value is
maintained at the output (refer to
for more information)
1
If the process variables SAL, % (Conc) or USP are selected the following steps
(Lin/Log) are omitted
5.2.1
Output configuration (continued)