August 2008
9
TMP-100
Installations requiring a turbine meter frequency output are labeled
A&S
and
COM
. These
terminals provide a 0- to 5-V square-wave output, representing the turbine meter frequency.
A load with a resistance 250K ohm or larger may be connected to these terminals. The shield
wire must be connected to the
COM
terminal.
Installations requiring a scaled pulse output are connected to the
OUT
terminal labeled
PUL
and
COM
. A load with a resistance of 250K ohm or larger may be connected to these
terminals. The shield wire must be connected to the
COM
terminal.
Relay Modules
Output connections labeled
RY1
and
RY2
are provided for two dry-contact pulse outputs
from a two-pole relay. On TMP-100 circuits supplied with the single-pole relay, the output
leads may be attached to either the RY1 or RY2 output connections. See the Specifications
section for relay module ratings.
Opto-Isolated Module
The relay may be omitted and an opto-isolated module may be substituted for an open
collector output at the
RY2
position. When the open collector module is used,
RY1
output is
not connected. See the Specifications section for opto-isolated module ratings.
Option-Board Connections
OPT1
and
OPT2
connections are used only when an option board is connected to the option
header.
OPT1
terminals are used for 4-20mA output representing rate when the TMR-100
option is installed. Further details on the use of
OPT1
and
OPT2
terminal strips are
provided in the TMR-100 4-20mA optional circuit assembly manual.
s to the TMP-100.ffff
Calibration
The calibration section of the TMP-100 functions as a scaler (turbine meter pulse divider)
with a range of 1 to 524,287, which is set by 19 miniature switches. The input flowmeter
signal is amplified and shaped, and then fed into a section where these switches divide it by a
number set, or divisor. This 19 binary scaler gives one output pulse for each group of turbine
meter pulses equal to the divisor. For example, if a divisor of 1,000 is set on the scaler
switches, the output will be one pulse for every 1,000 turbine meter pulses.
