APPENDIX F: SYSTEM VALUE PARAMETERS
TD1000C™Oil in Water Monitor
38
TD-1000C Oil In Water Monitor
Operation Manual
PN 101687
REV G
APPENDIX F: SYSTEM VALUE PARAMETERS
<0>
C
alibration
S
olution
V
alue
This value relates the fluorescence measurement value to known oil in water fluorescence
measurements. Lab analysis is performed by Turner Designs Hydrocarbon Instruments to determine
calibration solution values for different oil applications. Lab analysis is performed by Turner Designs
Hydrocarbon Instruments to determine calibration solution values for different oil applications. The
value is printed on the label of the calibration solution and listed in
Table 4
. The TD1000C™ is
calibrated from the factory for Number 6 Fuel Oil applications.
Table 5—Calibration Solution Values
Calibration Solution Value
Oil Equivalent
Concentration of Oil
Equivalent
11.5
Number 6 Fuel Oil
11.5 ppm
<1>
o
ffSet
V
alue
This value corrects the fluorescence measurement to account for the fluorescence of the non-
contaminated process water. This is called background fluorescence which is generally described as
non-oil related components in the process water which report as oil. Entering a negative offset value
decreases the measurement by the entered value while entering a positive offset value increases the
measurement by the entered value. It is very important that the offset value is entered correctly. To
determine this value perform the following steps:
1. Ensure the Calibration Solution Value is set to the proper value.
2. Ensure the Offset Value is set to 0.
3.
Allow non-contaminated process water to flow through the instrument.
4. Record readings every 10 seconds for a period of 5 minutes (30 readings total).
5. Average the readings and enter the calculated value as a negative offset according to the
steps outlined in
Section 4.1, Step 3
.
If the average value is negative, a positive offset will be required.
<2>
High Signal Alarm Level
This value is determined by process conditions and what the user determines their high signal level
to be. If the fluorescence measurement rises above the High Signal Level (and remains there for a
2-minute delay period), a High Signal Alarm will be triggered. Upon alarm, the monitor will trigger the
AC Relay output. (See
Appendix E
or additional details).
<3>
4
mA
o
utput
The 4–20 mA output can be connected by a signal wire to a data logger or other device to collect
and remotely store data from the monitor. Outputs can be set to correspond to a certain range of
fluorescence readings. Typically, the 4 mA output is set at 0 RFU.
The monitor will reject as
INVALID INPUT
any new 4 mA value if it is not lower than the 20 mA output
value.
<4>
20
mA
o
utput
The 4–20 mA output can be connected by a signal wire to a data logger or other device to collect
and remotely store data from the monitor. Outputs can be set to correspond to a certain range of
fluorescence readings.
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