Etatron eSelectM 2 PH-CL, Operatinginstructions And Maintenance, Page: 8 / 40

ENGLISH
8
M ai n addi ti onal functi ons
Setpoint
Relay outputs
1 - 2 - 3
3 setpoint ON-OFF
Independent settings to start up metering pumps or
peristaltic dispensers in constant mode or equipment
with ON-OFF mode
Setpoint Adjusts the setpoint value (ON-OFF mode)
Hysteresis
Selects a measurement range around the setpoint value,
locking the output relays (ON-OFF)
Acid – Alkaline pH
Direct - Reverse RX and CL
Selects the metering direction of the output relay.
Proportional modular pulse PWM
mode
Proportional Time/Pause pulse outputs activate metering
pumps or peristaltic dispensers with constant mode or
ON-OFF equipment.
Delay on setpoint value
Selects a delay time (max 999 sec adjustable) before
activating the output relay.
AUX Outputs Relay
The real-time clock controls remote appliances or devices connected to the AUX1 and 2 outputs
in a very accurate manner for programming minutes / hours / days / weeks.
Alarm 4 Relay Min Alarm / Max Alarm
Alarm function that, on exceeding a minimum or
maximum value, switches the alarm relay on or off.
4-20 mA1-2
mA devices outputs
Controls the data logger, PLC, recorder or devices suited to processing the mA signal
Setpoint metering
Controls mA metering pumps or devices suited to processing an mA signal
Calibration Calibration menu for pH or RX electrode (Redox) and Chlorine sensor or cell.
System
settings
Flow sensor Switches on or off the flow sensor input (proximity sensor)
Manual temperature Selects the manual temperature offset. 0-100°C (Auto-Temp=OFF)
Automatic temperature
offset
Offsets the temperature with the conductivity probe, therefore measuring the exact value
against the current temperature.
RS485/Ethernet
Remote control via external RS485 / ETHERNET module, Modbus protocol with ETACLOUD
Software. The operator connects the unit via a PC, a smartphone or a tablet.
TECHNICAL SPECIFICATIONS OF THE INSTRUMENT
PH measurement range:
▪ 0 pH .... 14 pH (0...100°C)
▪ Resolution
�
0.01 pH ▪ Precision 0.5% of the electrode input signal
▪ Input resistance > 10 12 Ohm
▪ Zero calibration: � 10% adjustment range from the calibration point
▪ “Gain” calibration:
�
10%
▪ Hysteresis: 0.05 pH (programmable)
▪ Timed PWM impulses: activation point: 1.50 pH (programmable)
RX (Redox) measurement range:
▪ – 1000 mV .... +1000 mV
▪ Input resistance > 10 12 Ohm
▪ Resolution
�
1 mV ▪ Precision 0.5% of the electrode input signal
▪ Hysteresis: 10 mV (programmable)
▪ Timed PWM impulses: activation point: 150 mV (programmable)