Rosemount 2081 pH, Instruction Manual

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3.1 GENERAL. Nearly all functions of the transmitter
are accessed through the dual push buttons. The
transmitter uses no potentiometers.
3.2 MENU SELECTION. The dual push buttons are
located on the side of the transmitter. Press and hold
both buttons to display the transmitter menu items.
See
Figure 3-1 . The display will show each item for
about one second then scroll to the next item. It will
continue to loop through the items until one is select-
ed. To select an item, release both push buttons when
the desired item is displayed.
NOTE
When no push button is pressed for a period
of 60 seconds, the transmitter defaults to
reading pH. If the push buttons are acciden-
tally released (e.g.
buF2
) and this would upset
the process, escape by waiting 60 seconds
for the transmitter to default to the pH reading.
3.2.1 Display Submenu. Functionality of the display
submenu (
dISP
) is the same as the main menu. To enter
the main menu, release both buttons on “
dISP
” and the
display will read “
PH
”. To read the pH value in the sub-
menu when “
PH
” is displayed, press and quickly
release both push buttons. To escape from the sub-
menu, simply depress both buttons and hold to enter
the main menu or wait 60 seconds for a pH reading.
3.2.2 Display Flags and Hold Mode. The transmitter
will activate a flag on the LCD corresponding to the
labeled units when appropriate. When the transmitter
is in hold output mode a flashing flag will appear on
the middle right hand side of the display and “
HoId
”
will flash periodically. The output will remain at the last
process value. To remove the hold mode, scroll to
“
HoId
” again and release both buttons.
3.3 VALUE ADJUSTMENT.
Selection of a menu item
that has a user-adjustable value will cause a numeric
display with the right-most digit flashing. Depressing
and holding push button #1 will cause the number
flashing to increment upwards, looping back to zero.
Depressing and holding push button #2 will shift the
flashing cursor to the next decade, looping back to the
right most decade. Once the number is correctly
entered, depressing both buttons briefly will enter the
displayed value into memory. The transmitter will
return to reading pH.
SECTION 3.0 DESCRIPTION OF CONTROLS
MAIN DISPLAY
MENU SUBMENU
dISP
– – – – – – – – – – – – – – – – – – – – – – –
→
PH
pH value
Std
Standardize pH
inPt
mV input
HoId
Initiate and remove hold output mode
curr
Output in mA
buF1
Buffer #1
DIo
Output in % of full scale
buF2
Buffer #2
DC
Temperature, °C
SLP
Electrode slope (mV/pH unit)
DF
Temperature, °F
LoPH
4 mA range point
HiPH
20 mA range point
tAdJ
Standardize temperature, °C
•
Press and hold both buttons auto scrolls through main menu
and submenu.
•
Release buttons to select item.
•
Push button #1: Press and hold auto scrolls digits.
•
Push button #2: Press and hold auto shifts decades.
•
Enter a value: Depress both buttons briefly.
FIGURE 3-1. Menu Description
MODEL 2081 pH SECTION 3.0
DESCRIPTION OF CONTROLS