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This indicates that the meter has lost its

configuration. Contact your dealer or the

nearest Hanna Customer Service Center.

ERROR MESSAGESERROR MESSAGES

ERROR MESSAGES

a) on zero reading:a) on zero reading:

a) on zero reading:

The instrument cannot adjust the light

level. Please check that the sample does

not contain any debris.

There is not enough light to perform a

measurement. Please check the prepara-

tion of the zero cuvet.

This indicates that the zeroing procedure

failed due to a low signal-to-noise ratio. In

this case press ZERO again.

There is too much light to perform a mea-

surement. Please check the preparation of

the zero cuvet.

The lamp is not working properly. Contact

your dealer or the nearest Hanna Customer

Service Center.

The lamp is not working properly. Contact

your dealer or the nearest Hanna Customer

Service Center.

Light over range. The cuvet is not inserted

correctly and an eccess ambient light is

reaching the detector. If the cuvet is properly

inserted, then contact your dealer or the

nearest Hanna Customer Service Center.

To connect your meter to the PC use the optional HI 920010 (avail-

able from your Hanna Dealer). Make sure that your meter is switched

off and plug the connectors, one into the meter RS 232C socket, the

other into the serial port of your PC.

Note: Cables other than HI 920010 may use a different configura-

tion, in which case, communication between the meter and the PC

may not be possible.

SETTING THE BAUD RATE

The transmission speed (baud rate) of the meter and the external

device must be identical. The meter is factory set to 2400.

If you wish to change this value, please contact your nearest Hanna

Center.

SENDING COMMANDS FROM PC

With terminal programs such as, for example, Telix

, Windows Termi-

nal

, it is possible to remotely control your Hanna Instruments bench

meter. Use HI 920010 cable to connect the meter to the PC, start the

terminal program and set the communication options as follows: 8, N,

1, no flow control.

Command Types

To send a command to the pH meter the scheme is:

This line makes the computer send a Data Link Escape character (/ or

?), the command expressed as a number or a 3-character sequence

and a CR character.

For samples containing more than 200 ppm of Potassium: first follow

the sample preparation procedure described at page 19 for NUTRIENTS

SOLUTION (HR). Then add to the graduated cylinder 20 mL of the

prepared sample (for HR) and fill the cylinder with demineralized

water from the Demineralizer Bottle up to the 100 mL mark.

Follow the MEASUREMENT PROCEDURE at page 43.

Read the result in mg/L of Potassium on the display and multiply the

reading by 5 to obtain the real concentration of Potassium in your

sample.

POTASSIUM ULTRA HIGH RANGE

INTERFACE WITH PC