KEM TRICOR TCE80 -E Series, Manual

Page: 47 / 98

Manual Operation
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Press “Info” a second time for getting 8 internal operating parameters:
Code Value
SA
Sensor voltage A in mV
SB Sensor voltage B in mV
DR Driver current in mA
PT Measured Temperature in °C
FRE Oscillating frequency in Hz
TOT Totalizer value in the selected units
ZP Zero point offset in µs
RS485 RS485 address
Tab. 3: List of service parameters
Press “Info” again for getting general information about the unit:
Code Value
TYPE:
Sensor type (TCM*)
SER.: Serial number
SW1: SW version main board
SW2: SW version display
Tab. 4: List of unit info
By pressing “Info” you can toggle between those 3 lists, for returning to the normal operation press “Display”.
4.4 Offset calibration
For best accuracy the Tricor needs an in situ offset calibration. This calibration zeroes out the ambient effects and
increases the measuring accuracy at low flow.
The offset calibration must be carried out with the medium to be measured and should be carried out at a
temperature and pressure as close to the normal operation as possible.
Proceed as follows:
Operate the unit for a while under normal operating conditions for making sure that the actual temperature of the
unit equals the normal operating temperature.
Switch off the flow. For best results use a valve in front and one behind the TCM. If the valves are not close to the
TCM and / or only one valve is used, wait long enough for being sure that there is no more flow through the TCM.
NOTE:
If there is a residual flow through the TCM or the TCM is exposed to mechanical shocks during the offset
procedure, the resulting value will be wrong.
Start the offset procedure as follows (see also chapter 4.5.3):

Press “P” for about 3 seconds

The display shows “ZERO OFFSET”

Press “P”

Change the indicated number with “up” to 2207 and confirm with “P”

Press “SLOW” (recommended) or “FAST”

The display shows “MAKE ZERO” for 10 to 30 s and counts down to “0”

Confirm with “Info”
The offset procedure takes about 10 s (fast) or 25 – 30 s (slow). During the procedure the red LED will flash.
For an automatic offset calibration initiated by the central control unit, the control input can be configured as
“initiate offset”. In that case the TCE starts an offset procedure each time a high level is applied to the input.
For configuring the input refer to chapter 4.5.7.4.