SCM31x
Transmitter pH and ORP/conductivity/DO
SCM 31X
Transmitter pH and ORP/conductivity/DO
FEATURES
- Converting pH and redox signal in 4-20mA (SCM 311)
- Converting conductivity signal in 4-20mA (SCM 312)
- Converting DO signal in 4-20mA (SCM 313)
- Span and ofset calibration
- Temperature compensation
- Galvanic input/output isolation
DESCRIPTION
SCM 311/312/313 is industrial measurement converter who has current signal 4-20mA as his output signal, equivalent to voltage of pH and ORP/conductivity/ DO input signal.
Transducer has a galvanic input/output isolation, wide range power supply, high input impedance, has a span and offset calibration feature, and manual or automatic compensation. Housing is water resistant and plastic for wall and panel mounting, it’s dimensions are 115 x 90 x 56 mm with IP65 protection.
Device calibration is performed using alphanumeric LCD display with 16 characters in two rows and four buttons keyboard.
Galvanic input/output isolation excludes the possibility of interferences from different kinds of earth connection. This is particularly important feature, since two different earth connections can differ for couple of hundreds of Volts.
APPLICATION
SCM 311/312/313 pH and ORP/conductivity/DO transmitter is used for assertive measurement of pH and redox/conductivity/DO in following systems:
- Waste water management systems,
- Production process automatisation (e.g. in chemical and food industry), and
- Remote tracking of river and lakes pollution
- Field data readout using laptop.
TECHNICAL SPECIFICATION
pH input (SCM 311) | Galvanic pH probe: combined two-probe system Resolution 0.01pHAccuracy 0.02pH |
ORP input (SCM 311) | Standard platinum probe Resolution 1mV Accuracy ±2mV |
Conductivity input (SCM 312) | Standard conductivity probe Resolution 0.01µS Accuracy 0.02µS |
DO input (SCM 313) | Galvanic probe for DO Resolution 0.1% Accuracy 0.1% |
Input resistivity | Higher than 1012Ω
|
Temperature input | internal sensor, 100Ω RTD, 1000Ω RTD, manual input Resolution 1°C Accuracy ±1°C |
Transmitter voltage | 13V nominal
|
Measuring range | SCM 311: 0.00 to 14.00 pH 0 to 1500mV (ORP) SCM 312: 0.00 to 20.00mS 0.000 to 2.000mS 0.0 to 200.0µS 0.00 to 20.00µS SCM 313: 0-100% saturation Temperature range: -20 to 110°C |
Measuring cycle | 0.4s
|
A/D converter | SAR 12-bits
|
Current output | 4-20mA, alarm value 3.5mA/20.5mA Resolution 0.005mA Accuracy ±0.05mA |
Working temperature | -10°C to 50°C
|
Humidity | 5 to 95%, without condensing
|
Display | LCD 8 digits 9mm
|
Power supply | From the loop (4-20mA), loop voltage 13 to 32Vdc
|
Dimensions | 90mm (H) x 115mm (W) x 56mm (D)
|
Assembly | Screw plug, max 2.5mm2
|
Weight | cca 500g
|
ORDERING INFORMATIONS
Model
SKU
Description
Price
SCM 311
10201
Isolated industrial pH and redox signal converter to 4-20mA
€350.00
SCM 312
10202
Isolated industrial conductivity signal converter to 4-20mA
€350.00
ORDERING INFORMATIONS
SCM311
Isolated industrial pH and redox signal converter to 4-20mA
€350.00
SCM312
Isolated industrial conductivity signal converter to 4-20mA
€350.00
ORDERING INFORMATIONS
SCM311
Isolated industrial pH and redox signal converter to 4-20mA
€350.00
SCM312
Isolated industrial conductivity signal converter to 4-20mA
€350.00
ACCESSORIES
*Please note specifications for the sensors compatible with our devices:
SCM 311 sensor specification:
- pH: galvanic pH electrode, combined or two electrode system
- ORP: standard platinum electrode
- external temperature probe: PT100/PT1000
SCM 312 sensor specification
- conductivity: standard conductivity electrode
- external temperature probe: PT100/PT1000
