Overview
I
2
Connection
No.
Terminal
Description
1
---
No connection
2
EC
(+)
Conductivity/
TDS input
3
EC
(
−
)
Conductivity/
TDS input
4
---
No connection
5
TC
(
−
)
Temperature input
(−)
6
TC (
+)
Temperature input (+)
7
485 (B)
RS485 signal output (B)
8
485 (A)
RS485 signal output (A)
9
DC 24 (
+)
DC 24V (+), linear power supply 1
10
DC 24 (−)
DC 24V (−), linear power supply 1
4 to 20 mA analog output
11
GND
Earth ground
12
DC 24 (+)
DC 24V (+), linear power supply 2
13
DC 24
(
−
)
DC 24V
(−), linear power supply 2
14
NC2
Relay resting position (NC2)
15
NO2
Relay working position (NO2)
16
COM2
Relay common (COM2)
17
NC1
Relay resting position (NC1)
18
NO1
Relay working position (NO1)
19
COM1
Relay common (COM1)
20
---
No connection
Meter Overview
Display
Icon
Description
Calibration
Indicates that the meter is in the calibration mode
Setup
Indicates that the meter is in the setup mode
ATC
Indicates that the automatic temperature
compensation is enabled
ALM1
Indicates the measurement exceeded the high limit
ALM2
Indicates the measurement exceeded the low limit
Keypad
Key
Function
•
Switch the meter on or off
•
Press and hold the key to enter the setup menu
•
Exit the calibration, settings and return to the
measurement mode
•
Start calibration
•
Increase value or scroll up the menu items
•
Set the temperature
•
Decrease value or scroll down the menu items
•
Toggle between the conductivity and TDS modes
•
Confirm the calibration, setting or displayed option
DC 24V
(+), linear
power supply 1
Current detection
4 to 20 mA
DC 24V
(
−
), linear
power supply 1
DC 24V
(+), linear
power supply 2
DC 24V
(
−
), linear
power supply 2
1
10
11
20
