Metrohm 751 GPD Titrino - Manual (Page 75)

2.6. Parameters, key <PARAM>
751 GPD Titrino
72
activate pulse: OFF
hold points in the calibration sequence for inputs.
Calibration temperature and pH values of the buffers
(which are temperature dependent) must therefore be
entered in advance. The inputs in key <PARAM> are
valid.
Pulse output on the line "activate" (L6, pin 1) of the
remote socket (all, first, OFF)
See page 224.
Calibration sequence
After the start, the activate pulse is output.
The start delay time is waited off.
Then, the calibration temperature is measured.
It no T sensor is connected, you enter the temperature
manually. Store the value with <ENTER> or continue with
<START> (T is not stored).
Enter the nominal value of the first buffer.
Store the value with <ENTER> or continue with
<START> (the value is not stored).
The first buffer is measured.
Enter the nominal value of the second buffer.
Store the value with <ENTER> or continue with
<START> (the value is not stored).
Leave the calibration with <STOP>
⇒ 1 point calibration.
The second buffer is measured.
As many buffers appear as have been specified in the
<PARAM> key (up to 9).
You may leave the calibration any time with <STOP>.
Data are output.
The calibration data are available for calculation:
C46: pHas
C47: Electrode slope
Calibration data can be viewed at any time with the
<CAL.DATA> key and the calibration report printed out
using the key sequence
<PRINT><CAL.DATA><ENTER>.
<START>
(Start delay)
Measuring cal.temp.
or
entry
Buffer 1 pH
Buffer 1 pH
etc.
Measuring buffer 1
Measuring buffer 2
Data output
(Activate pulse)