Programming For Control (Regulation) - Crison MultiMeter 44 Manual Del Usuario

Operation
Figure 28 Example for programming 4-20 mA output, register, for pH measuring channel.

4.14.2 Programming for control (regulation)

52
mA
18
16
14
12
10
8
a b
6
4
0 1 2 3 4
a) factory programming.
b) 4 mA: pH 4 and 20 mA: pH 10.
c) 4 mA: pH 12 and 20 mA: pH 2.
This option is possible only when control with relays is not carried out (see programming
for every specific channel).
With the measuring boards for conductivity, dissolved oxygen and chlorine can be
performed regulation through the 4-20 mA output only of the measured parameter but not
of the temperature. With the measuring board pH/mV/ºC can be performed regulation of
any of the three parameters.
The analogical output provides 2 different current levels:
4 to 20 mA for regulation.
•
Fixed at 3 mA, when the instrument is in Hold.
•
The regulation through the 4-20 can be delayed with a fixed time after start up the
instrument or after actuation of external Hold, see "Regulation delay" at
Configuration modification, page
display. During the external Hold, "L-OFF" will appear on the display.
1. From the main menu select
2. Select the channel to program and confirm.
3. Select
4-20 MA OUTPUT > NO
Note: The control through the 4-20 mA output is possible when "NO" is selected in the programming
of the relays control.
4. Select
CONTROL 1 LIMIT
5. Enter the 4 mA and 20 mA values for the selected limit using the keypad.
6. Select to accept the data.
CONTINUE
c
5 6 7 8 9 10 11 12 13 pH
22. During the delay time, "L-H" will appear on the
SYSTEM > PROGRAM CHANNEL
and confirm.
or
CONTROL 2 LIMIT
4.4.2
. Confirm.
and confirm