HF scientific Oil Content Monitor - Manual (Page 12)

OCM Rev. 3.9 (1/03) 6
5.0 Routine Operation
The OCM is designed to measure and display the concentration of oil (in PPM by weight)
in the bilge water according to I.M.O. resolution MEPC. 60(33). Readings above 50
PPM are outside of the range of this instrument.
5.1 Routine Measurement
During normal operation, the instrument will have the AUTO block highlighted with the
current scale displayed on the right side of the display, the measured reading on the upper
row of the display, and the current alarm level on the lower row of the display (see
illustration below).
The following steps describe how to measure the oil content of a sample using the
OCM:
1. Turn power on to the OCM. The instrument will be in the AUTO (measurement)
mode (the “AUTO” block should be illuminated). Allow instrument to warm up for
at least 45 minutes.
2. When a continuous process stream is flowing through the instrument, the instrument
will report the oil content of the sample by displaying it on the LCD screen.
3. Pressing the MODE button will allow you to sequentially access the calibration
routine (see section 6 for more information) and the configuration/setup routine (see
section 7 for more information).
5.2 Security Access Feature
The OCM is equipped with a security access code feature that can be turned on or off
when configuring the instrument. Three access codes are used in the instrument: one for
instrument calibration (333), one for instrument configuration (444), and one to zero
adjust the instrument (222). These codes are not changeable and are required as input
whenever the customer presses the MODE button to access either the calibration routine
or the setup routine if the security feature is enabled.
If the security feature is enabled, the screen shown in Figure 5 will be shown when you
press the MODE button. The security code has three numbers that are selectable one at a
time. Use the
tu
arrows to select the first number in the code and then press the
↵ ↵↵ ↵
key to accept the number. Then repeat the process for the next two numbers in the access
code. If you have selected a valid code the OCM will be directed to either the
calibration, the zero adjust, or the user setup mode depending on the access code that was
provided to the instrument. If the wrong access code is selected, the instrument will
return to the AUTO mode.