Product Manual

Wall Mounted Ultrasonic Flowmeter---User Manual
20
output circuits.
M81 and M80 should be used together to configure the batch controller.
Note: Because the measuring period is 500mS, the flow for every dos should be keeping at
60 seconds lon
g
to
g
et a 1% dose accurac
y
.
M82
View the daily, monthly and yearly flow totalizer and thermal energy totalizer value.
The totalizer values and errors for the last 64 days, 32 last 32 months and last 2 years are
stored in the RAM memor
y
, To view them, use the ‘ENT’ and ‘UP’ ‘Down’ ke
y
s.
M83
Automatic Amending Function for automatic offline compensation.
Select ‘YES’ to enable this function, select ‘NO’ to disable it.
When the function is enabled, The flow meter will estimate the average flow uncounted (or
‘lost’) during the offline session and add the result to the totalizer.
The estimation of the uncounted flow is made by computing the product of the offline time
period and the average flow rate, which is the average of the flow rate before going offline
and the one after
g
oin
g
on line.
M84
Set the thermal energy unit:
0. GJ 1. KC 2.KWh 3. BTU
M85
Select temperature sources
0. from T1,T2 (factory default)
1. from AI3,AI4
M86
Select the Specific Heat Value.
Factory default is ‘GB’. Under this setting, the flow meter will calculate the enthalpy of
water based on the international standard.
If the fluid is other than water, you should select option ‘1. Fixed Specific Heat’, and enter
the s
p
ecific heat value of the fluid.
M87 Turn on or turn off the Ener
gy
totalizer.
M88
Select thermal energy totalizer multiplying factor.
Factor
y
default is ‘1’.
M89
1. Display the temperature difference
2. Window for enterin
g
the lowest tem
p
erature difference.
M8.
Heat meter is on
1. Inlet
2. Outlet
Select the heat meter installation
p
lace.
M90
Display signal strengths S (one for upstream and one for downstream), and signal quality
Q value.
Signal strength is presented by 00.0 to 99.9, the bigger the value, the bigger the signal
strength will be, and more reliable readings will be made.
Q value is presented by 00 to 99, the bigger the better. It should at least be great than 50
for normal o
p
erations.
M91
Displays the Time Ratio between the Measured Total Transit Time and the Calculated
time. If the pipe parameters are entered correctly and the transducers are properly installed,
the ratio value should be in the range of 100±3%. Otherwise the entered parameters and the
transducer installation should be checked.
M92
Displays the estimated fluid sound velocity. If this value has an obvious difference with the
actual fluid sound speed, pipe parameters entered and the transducer installation should be
checked a
g
ain.