ATT2100 TEMPERATURE TRANSMITTER
Operation Manual M2100-REV-G
20
- “
SEtE
” : In case, Setting Value is not written on Memory
- “
ZtEr
” : In case, Setting Zero Trim value is 10% over Sensor Max Span
- “
bEr1
” : In case, Zero/Span and Zero Trim functions are stopped in the middle of work
(In case, Button is put only one time or put continuously) This message is present
for Button Error
3.9 Configuration Zero Point Adjustment
Zero Point Adjustment means to configure PV value which output after Zero Trim. At last, Zero point
Adjustment is to configure a current PV Value for another value, which is not zero, by configuring
Offset value of zero point. This is for configuring a current displayed value for a desiring process
value without making process value zero. Especially, in case of configuring level value is very
difficult to make Sensor Zero Trim, this adjustment is very convenient to configuring a current value
for a desiring value.
PV_raw : Value that transmitter calculates signal from sensor
PV : Value that transmitter finished Sensor Zero Trim or Zero Point Adjustment
Offset : Value calculated when Sensor Zero Trim or Zero Point Adjustent is done
PV = Offset
a)
In case, Sensor Zero Trim :
PV = 0 = Offset
(In result, Offset = - PV_raw)
b)
In case, Zero Point Adjustment
PV= Offset
(Offset is variable. Therefore, PV value and Zero point can be configured by changing Offset
value).
There are two ways for Zero Point Adjuntment of ATT2100
A. Using Zero/Span button attached on transmitter
B. Using HART communicator, HHT, etc.
* For more information and details, please refer to 275 User Guide
The below guide is a Zero Point Adjustment procedure using Zero/Span button
1) Loosen both bolts of Name Plate on upside transmitter and push the right end of Name Plate back
a little bit(Figure 3-5)
2) Apply necessary pressure and push Zero and Span button simultaneously over 3 seconds. Then
show “Z-tr” in LCD window. And continuously push Zero and Span buttons over 3 seconds again.
Then show “Z-AD” in LCD window. After making sure this message, 0.01% diminishes whenever