Dwyer TM2 - Manual (Page 7)

Section IV. OPERATING INSTRUCTIONS
The entire operation of the Model TM2 is dependent on the two
buttons located on the front panel. The unit will not operate in
programming mode. If it is currently in program mode (with a
jumper from pin #1 to pin #5), then remove the jumper and the
Model TM2 will automatically exit program mode and return to
normal operation.
Two screens are available on the Model TM2. The Totalizer
screen displays the accumulated pulse inputs, or total flow. This
unit will totalize up to 8 digits, automatically blanking any leading
zeros. The Rate screen shows the current process, or flow rate,
passing through the Flo-Sensor the display is connecting to. This
screen updates ever 0.7 seconds. To determine which mode you
are currently in, look at the far left of the display. If the letter “R”
is displayed there, then the Model TM2 is displaying rate. If there
is no “R”, then the display is showing total flow. To toggle
between the two modes, press the T/R button.
If you are currently in Rate mode, the RST button and/or reset
terminal have no effect. If you are operating in Totalizer mode,
then the RST button will reset the totalizer back to zero. If this
button has no effect, it may be disabled (see Programming
Instructions). The totalizer may also be reset by momentarily
connecting pin #4 (on the rear of the unit, RST) to pin #1 (also
on the rear, GND). This function cannot be disabled.
If the totalizer is not reset before all 8 digits read “9”, then it will
roll over back to zero and continue monitoring total flow.
MAINTENANCE
Upon final installation of the Series TM2 Digital Rate Meter and
Totalizer, no routine maintenance is required. A periodic check of
the system calibration is recommended. The Series TM2 is not
field servicable and should be returned if repair is needed (field
repair should not be attempted and may avoid warranty). Be sure
to include a brief description of the problem puls any relevant
application notes. Contact customer service to receive a return
goods authorization number before shipping.
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