User Guide

8
This indicates that the meter has lost its
configuration. Contact your dealer or the
nearest Hanna Customer Service Center.
ERROR MESSAGESERROR MESSAGES
ERROR MESSAGESERROR MESSAGES
ERROR MESSAGES
a) on zero reading:a) on zero reading:
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.
53
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:
<DLE> <command> <CR>
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.
INTERFACE WITH PC
Note: Windows Terminal
®
and all the other terminal programs that
support the ANSI escape sequence, represent the DLE character by the
string ‘^P’ and the CR character by the string ‘^M’.
Type of Commands
/OFF - Turn the meter OFF
/PDR - Press Read Direct
/PTR - Press Timer
/PZR - Press Zero