Revision: 3.0.3
11
Appendix3-RTD Module
11.1
RTD Energy Meter Function
This function is applied to the following mete
D116 Hot(Cold) Energy Meter:0~100
℃
,equ
The RTD Module
’
s main function is to input
automatically calculate the caloric content of
value and totalized energy value.
11.2
Wiring(PT1000)
Three-wire connections
methods is used for
methods is as follows.(Note: A1, A2, B1, B2 a
The two PT1000 temperature sensors are inst
signals to the D116 transmitter.
11.3
Energy Measurement Meth
Energy Measurement Methods:
Formula 2: Q= m (h1-h2)
Q—Energy Value
m—quality of the medium( density
h1—enthalpy value of the inlet wat
h2—enthalpy value of the return w
The temperature and pressure at the inlet and
transmitter, and pressure sensors and a transm
be calculated through the enthalpy values tab
sensors and D116 transmitter, and the caloric
calibration index.
11.4
Temperature Calibration M
There are two methods to calibrate the RTD
to the actual situation).
Method One: Resistance box calibrat
Note: The purpose is to calibrate the interna
Tools needed: one DC resistance box, 3 wire
4mA
RTD
PT1000
White
Red
Black
Inlet po
D116 Series Ultrason
odule and PT1000 Wiring (Module option
ction
eter and measurement temperature range:
equipped with PT1000 temperature sensor.
nput the temperature values for the energy measurement. T
of water at different temperatures and deriving an instan
or the RTD module and PT1000 temperature sensors,co
B2 are the same color, C1 and C2 are the same color).
nstalled on the inlet and return pipes and they will input
ethods
sity
×
transit time water volume)
t water
rn water
and return water points can be measured by temperature s
ansmitter. Then the enthalpy value at the inlet and return w
table. The flow of the medium can be measured via the u
ric value can be derived according to the above formula
Methods
D module (customers can choose the proper one to calib
ration method
ternal circuit of RTD module
wires (each wire less than 40mm long), and an instrument
A1 B1 B1
A2 B2 B2
20mA
4mA
20mA
TD
000
ack
port
Return port
Red
Black
White
PT1000
Three Wires Connection
sonic Flowmeter
Page 51 of 53
tional)
t. The D116 can
tantaneous energy
connections
nput temperature
re sensors and a
rn water points can
he ultrasonic flow
las and the caloric
librate according
ent screwdriver.
