Crison MultiMeter 44 Manual Del Usuario página 26

Operation
4.5.3 Calibration
4.5.3.1 Calibration with pH buffers
24
Relay for limit and alarm: deactivated.
•
4-20 mA output for pH and temperature: deactivated.
•
Hold: Last value.
•
To modify the programming and adapt it to the particular application:
Note: During programming, the relays of the corresponding channel are deactivated. 4-20 mA
output (register) is in Hold (21 mA or last value).
1. Press to access to the
ESC
2. Introduce the code
100
3. Select . Press
SYSTEM
4. Select
PROGRAM CHANNEL
5. Select and modify the following options:
Option Description
pH + Temperature, mV + Temperature or Temperature. If the option "ºC" is
selected, on the display of the instrument only the measured temperature
Units
appears and the channel is used as temperature regulator.
Temperature sensors from other channels. The temperature compensation
can be carries out using the temperature value measured in any of the other
Temperature
two channels.
Selection of the type of control and the limits values.
NO: indicates that no control with relays will be used.
pH: Selectable values between pH 0.0 and pH 14.0
Relay control
ORP: Selectable values between -2000 and +2000 mV.
Temperature: selectable values between -10 and 150 °C (14 and 302 °F).
See detailed information on
Alarm.See detailed information on
Sensor alarm: when the units are "Temperature", the sensor alarm for
Alarm
"variation less than" occurs when the temperature probe is not connected.
4-20 mA output,
4-20 mA output for pH. See detailed information on
pH
4-20 mA output,
4-20 mA output for Temperature. See detailed information on
º C
Selection of the current output (register) when the channel is in situation of
Hold
cleaning, programming or calibration with standards.
Note: If "Temperature" is selected as measuring units, the options related with calibration disappear.
To re-adjust the temperature, see
temperature re-adjustment is carried out, it can be seen as "Calibration data", in the Data Logger,
see 4.15 Data Logger, page
To measure pH correctly, the electrode and the instrument set need to be calibrated
regularly with buffer solutions.
The instrument allows one-, two- and three- point calibration. The calibration parameters
remain in memory until a new calibration is performed. If there is any anomaly, the
instrument will show an error message.
.
MAIN MENU
and accept with
OK
to confirm
OK
and then the channel to configure.
4.13, Page
4.16 Temperature readjustment, °C or °F, page
53.
49.
4.12, Page 48.
4.14, Page
54. If a
51.
4.14, Page 51.