10
1
The meter automatically checks for entered time / date accuracy as follows:
0
≤
hh
≤
23; 0
≤
mm
≤
59; 01
≤
dd
≤
28/29/30/31; 1
≤
MM
≤
12; 1998
≤
YYYY
≤
2097.
2
To change the password, the correct code must be entered first. If the password
has been forgotten, the password protected features are no longer accessible;
in this case contact your nearest Hanna Service Center.
Some of the setup parameters are explained below.
Item tC - Temperature Compensation
The temperature used for pH compensation can be:
- automatic reading from the probe (ATC).
- user defined (MTC)
Follow, the next steps to select the temperature source:
• Select item "tC".
• Select option: "Atc" or "ntc".
• Press ALT and CFM to confirm.
Note:
If the "ntc" option has been selected, in pH measurement
mode the "°C" tag blinks and the temperature value can be
modified with the arrow keys.
Item ELC - Electrode Condition
Electrode condition provides information about the electrode's performance.
100 means a good electrode, a low value means a bad electrode. When
this value is below 10, the "bAd" message is displayed.
• Select item ELC.
• Select option: "On" or "OFF".
• Press ALT and CFM to confirm.
The electrode condition will be displayed while in pH or mV measurement
mode, alternatively with the temperature.
Note:
The electrode condition value is displayed only if a two-point
procedure has been performed for pH calibration and the ELC
option is "On".
Item AOF - Auto-off
The auto-off time-out is fixed at 5 minutes.
• Select item AOF to enable / disable this feature.
Item Id - Setting the identification (ID) code
When using several identical meters it may be useful to uniquely
identify them by assigning an ID code to each meter.
• Select item Id.
23
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:
<
command>
<CR>
The computer sends the command expressed as a 3-character se-
quence and a CR character.
Note
:
All the terminal programs that support the ANSI escape
sequence, represent the CR character with the string '^M'.
The available commands are as follows:
MOD
- to request the firmware code of the meter.
GLP
- to request the last calibration data.
The meter answers with the following order:
pH calibration status (0=not calibrated , 1=calibrated)
pH calibration date (ddmmyy)
pH calibration time (hhmm)
pH electrode offset
pH electrode slope
pH buffer 1
pH buffer 2
electrode condition
mV calibration status (0
=
not calibrated)
mV calibration date (ddmmyy)
mV calibration time (hhmm)
mV buffer 1
mV buffer 2
mV buffer 3
If an item is not available (e.g. buf 3 in case of a two points
mV calibration) the character "N" will be received.
PAR
- to request the setup parameters setting.
The meter answers with a 6-character string for each parameter.
LTB
- to request the number of logged samples.
LOD
- to request the logged data.
The meter answers with the following order:
status byte
date (ddmmyy)
time (hhmm)
pH reading (binary)
mV reading (binary)
temperature reading (binary)
