Benchmark TD-550 - Channel Selection Guidelines; Cuvette Selection Guidelines

TD-550/560 Oil in Water Analyzer Operation
PN 106737
REV H
TD-550/560 Oil in Water Analyzer
Operation Manual
11
2.2 CHANNEL SELECTION GUIDELINES
The TD-550 is a single-channel crude oil analyzer with extended range and low detection limits for most
crude oils.
The TD-560 features two channels. The near ultraviolet (NUV) channel, provides the same functionality
as the TD-550. In addition, the deep ultraviolet (DUV) channel can be used where high sensitivity
is required. The DUV channel can detect all of the commonly used rened oils, crude oil, and gas
condensates, with signicant improvement over competing analyzers. The DUV channel is ideal for
weakly uorescent hydrocarbons or for very low concentrations of hydrocarbons.
NUV Channel (TD-550/560)
In most cases, use the NUV channel for measuring
• Crude Oil in Produced Water
• Heavy crude oils (higher concentrations)
• Heavy fuel oils (higher concentrations)
DUV Channel (TD-560)
In most cases, use the DUV channel for measuring the following hydrocarbons in water or soil
• Gas Condensate
• Diesel
• Marine Diesel
• Fuel Oil #6 (< 1 ppm)
• Lube Oil
• Crude Oil in Produced Water (< 1 ppm)
Use the above general suggestions regarding channel choices. If during the calibration you encounter
low uorescence values for the calibration solution or non-linear calibration, refer to Section 6
Troubleshooting for further suggestions. The linearity should always be checked for any calibration.
2.3 CUVETTE SELECTION GUIDELINES
The TD-550 includes an 8 mm adapter for the sample well and 8 mm diameter cuvettes (round). If you
need to detect a lower linear range, purchase an optional 10 mm adapter kit and 10 mm cuvettes.
The TD-560 includes a 10 mm adapter for the sample well and 10 mm square cuvettes. The cuvettes
can be used with either the NUV or DUV channel. An 8 mm adapter kit and cuvettes can be purchased
separately for measuring crude and heavy oils in the NUV channel only. The 8 mm round cuvettes
cannot be used with the DUV channel.
Use the 8 mm cuvettes (P/N 50957) for measuring heavy crude oil and other highly uorescent oils in
water. Use the 10 mm cuvettes (P/N 106686) for diesel, gas condensates, lube oil and other rened
hydrocarbons in water or for very low concentrations of crude oil-in-water. The cuvette size is selected
when the calibration concentration is entered on the Calibration screen. You must use the same
cuvette type for the calibration and analysis. Changing the cuvette type for analysis will cause incorrect
measurements.
If you encounter problems during calibration, refer to Section 6 Troubleshooting for cuvette type and
measurement channel suggestions.