PFlow Industries D116 User Manual

Revision: 3.0.3
11 Appendix3-
RTD Module and PT100
11.1
RTD Energy Meter Function
This function is applied to the following meter and measurement temperature range:
D116 Hot(Cold) Energy Meter:0~100 ℃
,equipped with PT1000 temperature sensor.
The RTD Module’s main function is to input the temperature values for the energy measurement. The
automatically calculate the caloric content of water at different temperatures
value and totalized energy value.
11.2 Wiring(PT1000)
Three-wire connections methods is used
for the RTD module and PT100
methods
is as follows.(Note: A1, A2, B1, B2 are the same color, C1 an
The two PT1000
temperature sensors are installed on the inlet and return pipes and they will input temperature
signals to the D116 transmitter.
11.3
Energy Measurement Methods
Energy Measurement Methods:
Formula 2: Q= m (h1-h2)
Q—Energy Value
m—
quality of the medium( density
h1—
enthalpy value of the inlet water
h2—
enthalpy value of the return water
The temperature and pressure at the inlet and return water points can be measured by temperature sensors
transmitter, and pressure sensors and a transmitter. Then the enthalpy value at the inlet and return water points can
be calculated through the enthalpy values table. The flow of the medium can be measured via the ultrasonic flow
sensors and D116 tra
nsmitter, and the caloric value can be derived according to the above formulas and the caloric
calibration index.
11.4 Temperature
Calibration Methods
There are two methods to calibrate the RTD module (customers can choose the proper one to calibrate according
to the actual situation).
Method One: Resistance box calibration method
Note: The purpose is to calibrate the internal circuit of RTD module
Tools needed: one DC resistance box, 3 wires (each wire less than 40mm long), and an instrument screwdriver.
4mA
RTD
PT1000
White
Red
Black
Inlet port
D116
Series Ultrasonic Flowmeter
RTD Module and PT100
0 Wiring (Module o
ptional)
RTD Energy Meter Function
This function is applied to the following meter and measurement temperature range:
,equipped with PT1000 temperature sensor.
The RTD Module’s main function is to input the temperature values for the energy measurement. The
automatically calculate the caloric content of water at different temperatures
and deriving an instantaneous energy
for the RTD module and PT100
0 temperature sensors,
connections
is as follows.(Note: A1, A2, B1, B2 are the same color, C1 an
d C2 are the same color).
temperature sensors are installed on the inlet and return pipes and they will input temperature
Energy Measurement Methods
quality of the medium( density
× transit time water volume)
enthalpy value of the inlet water
enthalpy value of the return water
The temperature and pressure at the inlet and return water points can be measured by temperature sensors
transmitter, and pressure sensors and a transmitter. Then the enthalpy value at the inlet and return water points can
be calculated through the enthalpy values table. The flow of the medium can be measured via the ultrasonic flow
nsmitter, and the caloric value can be derived according to the above formulas and the caloric
Calibration Methods
There are two methods to calibrate the RTD module (customers can choose the proper one to calibrate according
Method One: Resistance box calibration method
Note: The purpose is to calibrate the internal circuit of RTD module
Tools needed: one DC resistance box, 3 wires (each wire less than 40mm long), and an instrument screwdriver.
A1 B1 B1 A2 B2 B2
20mA 4mA 20mA
RTD
PT1000
Black
Inlet port
Return port
Red
Black
White
PT1000
Three Wires Connection
Series Ultrasonic Flowmeter
Page 51 of 53
ptional)
The RTD Module’s main function is to input the temperature values for the energy measurement. The
D116 can
and deriving an instantaneous energy
connections
temperature sensors are installed on the inlet and return pipes and they will input temperature
The temperature and pressure at the inlet and return water points can be measured by temperature sensors
and a
transmitter, and pressure sensors and a transmitter. Then the enthalpy value at the inlet and return water points can
be calculated through the enthalpy values table. The flow of the medium can be measured via the ultrasonic flow
nsmitter, and the caloric value can be derived according to the above formulas and the caloric
There are two methods to calibrate the RTD module (customers can choose the proper one to calibrate according
Tools needed: one DC resistance box, 3 wires (each wire less than 40mm long), and an instrument screwdriver.

PFlow Industries D116 Specifications

General

Brand	PFlow Industries
Model	D116
Category	Measuring Instruments
Language	English