Initial Asc Entry; Program New Asc Data; Set The Units Available On The Display; Maintenance - Hach 2100AN IS User Manual

If the display flashes 0s when measuring Absorbance or transmittance,
set the analytical reference point again and measure again. Also, make
sure that the expected reading is positive when measuring absorbance.

Initial ASC entry

Note: Make sure that the instrument is calibrated before making NTU
measurements.

Program new ASC data

1. Push UNITS/Exit until the correct ASC unit name is shown on the
display (ASC -1- or -2-).
2. Push CAL/Zero to enter the ASC calibration mode.
The left digit flashes.
3. Use the arrow keys to enter a three-digit calibration name.
Note: The name cannot be one of the units already used FNU, NTU, EBC, %T,
A, -1- or -2-) .
4. Push ENTER.
ENTER MUL is shown on the display.
5. PushENTER.
The display shows "1.0000" (or the last factor entered) with the
decimal point flashing.
6. Push the right arrow key to move the decimal point to the right.
7. Push ENTER to accept the decimal point position.
The left digit of the display flashes.
8. Use the arrow keys to change the number on the display to the
correct multiplication factor for the data point.
9. Push ENTER to accept the multiplication factor.
The instrument returns to the measurement mode.

Set the units available on the display

1. Push SETUP. The SETUP light turns on.
2. Select 85 using the arrow keys, then push ENTER.
"U SET 0" is shown on the display.
3. Use the arrow keys to select a measurement units option:
Option Description
U SET 0 Sets all the units as available on the display: FNU, FAU, NTU, -1-,
-2-, EBC, %T, A
U SET 1 Set the units FNU and FAU as available on the display.
U SET 2 Sets the units FNU, FAU and NTU as available on the display.
U SET 3 Sets the units FNU, FAU and -1- (ASC) as available on the
display.
4. Push ENTER.
5. Push SETUP.

Maintenance

D A N G E R
Multiple hazards. Only qualified personnel must conduct the tasks
described in this section of the document.

Clean the instrument

Keep the instrument clean to get continuous and accurate operation.
N O T I C E
Never use cleaning agents such as turpentine, acetone or similar products to
clean the instrument including the keypad.
1. Turn the instrument off and disconnect the power cord.
2. Clean the surface of the instrument with a soft, moist cloth and a
weak soap solution.
3. Dry the surface of the instrument with a lint-free cloth.

Replace the LED light source

The light source, light emitting diode (LED), is not user replaceable.
Contact Customer Service for LED replacement.
English 43