OPERATING THE IMH
After completing scaling and all set-up operations, the unit is ready to install
and operate. After power is applied, a display test consisting of illuminating all
segments for 2 seconds is performed. Afterward, the input or total will appear,
depending upon the display mode prior to the last power-down. To switch the
display to input, press
“DOWN” (indicated by “arrows” on the front panel)
and
to switch to total, press
“UP”
. A minus sign “-” will precede numbers that are
negative. If a decimal point is chosen, one leading and one or more trailing zeros
will accompany the decimal point.
QUICK PROGRAMMING
To limit access to the set-up parameters, connect a key-switch or wire from
PGM.DIS.
(TBA #3)
to COMM.
(TBA #5)
. With this pin connected to common,
only a predetermined amount of data can be viewed or altered, as programmed by
programming module #3. If
“NO”
was programmed for all of the available steps
in module #3, then pressing
“P”
will cause the unit to display
“Loc”
. However,
if
“YES”
was programmed in one or more of the steps, then
“P”
will invoke entry
into a series of commonly modified parameters while protecting the crucial
set-up information. This is referred to as the
“quick”
programming mode. When
“quick”
programming mode is entered, the alarms and hysteresis values can be
modified in the same manner as in the regular programming mode. The new
alarm and hysteresis values will take effect when
“P”
is pressed. The other
operations in the
“quick”
programming mode require special key sequences as
shown:
To reset a latched alarm, scroll through steps in
“quick”
programming mode using the
“P”
button until
“LAtCH1”
or
”LAtCH2”
appears in the display. If they do not appear, they are
not latched.
To reset: While
“LAtCH1”
or
”LAtCH2”
is being
displayed, press and hold
“DOWN”
and press
“P”
.
Pressing
“P”
alone causes no action on the alarm.
To reset peak and valley buffers, scroll through steps in
“quick”
programming mode using the
“P”
button until
“PEA”
or
“VAL”
appears in the display.
To reset: While
“PEA”
or
“VAL”
is being displayed,
press and hold
“DOWN”
and press
“P”
. Pressing
“P”
alone causes no action on the buffer.
The front panel buttons are not only used to input data during the
programming and
“quick”
programming mode, but control a number of other
functions
(if enabled in Pro “3”)
as well. In the normal meter mode, these
functions are available:
To switch to display of input: Press
“DOWN”
button
To switch to display of totalizer: Press
“UP”
button
To re-zero input
(tare)
: Press and hold
“DOWN”
and press
“P”
To reset totalizer to zero: Press and hold
“UP”
and press
“P”
To enter programming or
“quick”
programming: Press
“P”
After each operation, a message will appear briefly to acknowledge
the action.
-18-