Hanna Instruments hi 98140 User Manual
22
LCD BACKLIGHT
The LCD can be illuminated to allow the user to see the readings even
in dark environments.
It can be enabled/disabled through the LIGHT
key and it is automatically disabled when batter-
ies are in low battery condition.
Two levels (low and high) of backlighting can be selected. Repeatedly
pressing the LIGHT key causes the lighting to cycle from off to low then
to high intensity.
in dark environments.
It can be enabled/disabled through the LIGHT
key and it is automatically disabled when batter-
ies are in low battery condition.
Two levels (low and high) of backlighting can be selected. Repeatedly
pressing the LIGHT key causes the lighting to cycle from off to low then
to high intensity.
Note: It is not possible to enable backlight in low battery condition;
the "Batt" indication will be displayed when trying to do so.
When the backlight is enabled and an external power supply
is connected to the instrument, the backlight is always on.
is connected to the instrument, the backlight is always on.
Press RANGE to set the meter to time or date mode and connect the
meter to a PC through the RS232C output (the connector is located
on the top of the meter). Use HI920011 (5 to 9-pin) connection
cable.
To stop communication, press RANGE to display pH or mV reading.
SPECIFICATIONS:
meter to a PC through the RS232C output (the connector is located
on the top of the meter). Use HI920011 (5 to 9-pin) connection
cable.
To stop communication, press RANGE to display pH or mV reading.
SPECIFICATIONS:
Isolated 8-bit data transmission
Baud Rate:
Baud Rate:
2400
Start bit:
1
Stop bit:
1
Parity bit:
none
SENDING COMMANDS FROM PC
With any terminal programs it is possible to remotely control your pH
meter. Connect the meter to the PC through the HI920011 cable,
start the terminal program and set the communication options as
follows: 8, N, 1, no flow control.
To send a command to the pH meter the scheme is:
With any terminal programs it is possible to remotely control your pH
meter. Connect the meter to the PC through the HI920011 cable,
start the terminal program and set the communication options as
follows: 8, N, 1, no flow control.
To send a command to the pH meter the scheme is:
<command> <CR>
The computer sends the command expressed as a 3-character se-
quence and a CR character.
quence and a CR character.
Note: All the terminal programs that support the ANSI escape
sequence, represent the CR character with the string '^M'.
DATA TRANSFER TO PC