HF scientific Micro200BW Turbidimeter - 0 -1000 NTU - Manual (Page 38)

Page 24
MICRO 200 BW 0 - 1000 NTU (5/05)
Rev. 3.1
a. Backwash Calibration
This is the backwash calibration menu and usable only with Backwash Sensor connected. To get to it you must first enter
backwash from the main menu. You will be asked if you wish to calibrate. If you respond with yes (F2) you will reach the
calibration screen above. If you respond with no (F3) you will go directly to the backwash display menu. After the calibration
procedures have been completed, press the menu button to reach the backwash display screen.
There is only one point of calibration for backwash, 100% T. The sensor must be placed in what is to be considered 100% T
water (preferably the same water as used in the backwash process). Pressing F2 will then calibrate the analyzer to the 100%
T frequency of the sensor. The right hand side of the screen shows the stored real frequency number.
In the center of the screen are two numbers. The top number shows the current real frequency reading (decimal adjusted). The
lower number shows the corrected or linearized frequency. In most instances the numbers on this screen can be ignored. They
do, however, serve as a useful diagnostic tool.
The function keys F1, F3, F4 & F5 are not used in this menu.
See page 34 for complete maintenance procedures.
F2
F3
ALARM
F5 F4
MENU
F1
Calibrate
Ø9984 Hz
Ш99.8Ш% T
1ШШ.Ш%T 1ØØØ5.Hz
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