TMP-100
6
August 2008
General Information
The NuFlo TMP-100 Turbine Meter Pulse Divider Circuit is a solid-state electronic
instrument designed for use with a NuFlo turbine flowmeter. The TMP-100 provides a pulse
output in the form of two dry contacts from a two-pole relay, single-pole relay or an opto-
isolated open collector transistor output.
The TMP-100 has a divisor capability of 1 to 524,287 to enable the pulse outputs to be scaled
to most standard units of measurement.
The TMP-100 can drive an LCD counter, user-selectable negative- or positive-going logic
level (0-5 VDC) pulse output, and logic level turbine meter frequency output.
An option header enables optional circuits such as the TMR-100, opto-isolated, and loop-
powered 4-20mA rate output circuit board to be mounted above the TMP-100.
Specifications
Input
•
Power supply: 10 – 28 VDC, 2 mA current draw quiescent (12 mA during relay
contact closure or when opto-isolator open collector module is on)
•
Input signal: 20 mV peak to peak – 10 V peak to peak
•
Divisor: 1 to 524,287 (set by 19 miniature dip switches)
•
Operating temperature: -20º to 140ºF (-28º to 60ºC)
Output
•
Square wave output at 0 to 5 V logic level at turbine meter frequency. Load = 250K
ohm or larger. Maximum turbine meter frequency = 3,000 Hz
•
Pulse output from divisor at 0 to 5 V logic level. Pulse direction is user-selectable for
positive- or negative-going pulse. Pulse duration is adjustable from 60 ms to 800 ms.
Load = 250K ohm or larger.
•
Dry contact output two-pole relay, relay closure duration is adjustable from 60 ms to
800 ms (Relay Contact Rating: .5 A, 30 VDC, 10 W max.)
•
Opto-isolated open collector output is adjustable from 60 ms to 800 ms “on” time.
(Opto-Isolated Module: .1 A max., 30 VDC max.)
Note:
The maximum pulse output rate for the pulse output section, whether dry contact relay
or opto-coupled output, is 15 Hz (8 Hz @ 50 percent duty cycle). This is based on a 60-ms
pulse duration setting. The maximum pulse output rate will be lower for longer pulse
duration settings.
•
Optional feature:
rate option circuit board with 4-20mA output representing rate
