Crison MultiMeter 44 Manual Del Usuario página 46

Operation
4.10.2 Programming
4.10.3 Calibration
44
Table 2 Specifications Chlorine sensor 60 70
Model
pH dependence
Time constant
Connector
Dimensions
Polarization time
The factory configuration of the instrument is:
Measuring units: ppm
•
Relays for limit and alarm: deactivated
•
4-20 mA output for chlorine and temperature: deactivated.
•
Hold. Last value
•
To modify the factory programming and adapt the instrument to the 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
Units
Relay control
Alarm
4-20 mA output,
free residual chlorine
4-20 mA output, º C
Hold
Before calibration the system instrument-electrode should have been working for at least 1 h
(polarization period)
With the calibration the instrument adapts to the electrode and to the variations the sensor
suffers in the time. The calibration is carried out against the DPD1 colorimetric method.
60 70
Low. Approx. 10% per one pH unit
T90: 1 minute
MP-4
Ø 25 mm x 175 mm
1 hour
.
MAIN MENU
and accept with
OK
to confirm
OK
and then the channel to configure.
Description
Measuring units: mg/L or ppm
Selection of the type of control and the limits values.
NO: indicates that no control with relays will be used.
See detailed information on
Alarm.See detailed information on
4-20 mA output for Cl2. See detailed information on
4-20 mA output for Temperature. See detailed information on
Page 51.
Selection of the current output (register) when the channel is in
situation of cleaning, programming or calibration.
N O T I C E
4.13, Page 49.
4.12, Page 48.
4.14, Page 51.
4.14,