Product Manual

Wall Mounted Ultrasonic Flowmeter---User Manual
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The corresponding value of AI3,AI4, AI5 need to be set on M64,M65,M66 separately.
The prior digit corresponds to the analogue value of 4mA, and the latter digit corresponds to the
analogue value of 20mA.
Example, assume to input pressure range 0~10kgs
from pressure transmitter. The 4-20mA signal of pressure
transmitter is connected to GND and AI5, then
input ‘0’ to 4mA and ‘10’ to 20mA in window M66.
If the current value of pressure transmitter is different from
that displayed on window M51, it will need recalibration for
the analogue wire.
For detailed calibration information, please contact us.
4.13 How to use batch controller
The interval time of batch controller is from 5ms to 500ms.
Please do the following to use the batch controller:
1) Go to menu window M80 to select the trig signal.
2) Go to menu window M78 (OCT output) or M79 (relay output), select “8 Batch Control”.
3) Use menu window M81 to set the flow batch value (dose).
The input signal can be set and controlled by keypad or analog input port or MODBUS. The signal
is outputted by OCT or Relay.
Chapter!5!Thermal!Energy!Measurement!
5.1 General Introduction
The new version flowmeter has two methods for thermal energy measurement;
"Utilize standard 2-way PT100 resistors. Its temperature range is 0-150
!, and after calibration,
the accuracy in the range of 0-150
! is less than 0.1!.
"Utilize temperature transmitter with 4-20mA output. The temperature analogue signal can be
inputted by terminals AI4 and AI5 of the flowmeter. If possible, we recommend PT100 resistors
which can have a better performance.
New generation ultrasonic flow meters have two specific heat value methods in system software:
one is GB, standard CJ128 specific heat value(factory default),under this setting, the flow meter
will calculate the enthalpy of water based on the international standard; the other is 1. Fixed
Specific Heat, if the fluid is other than water, users should select option ‘1. Fixed Specific Heat’,
and enter the specific heat value of the fluid. If the temperature is over 150!, also use this
method.
Because specific heat of water is different in different temperatures, the measuring results with