M-920 Precise Electromagnetic Flowmeter
Inductive flow meter M-920 is a device designed for measuring, indicating and storing flow and passed through volume data of conductive liquids. Flow meter M‑920 records both positive and negative flow. As there are neither moving nor mechanical parts in the flow profile the device can be applied to measure extremely polluted liquids containing even solid pollution. The only limitation is that the device can be used solely with conductive liquids.
Range of applications. Inductive flow meter M-920 is designed to be used in the chemical industry, paper industry, waterworks maintenance, waste-water maintenance etc.
Features. Inductive flow meter M-920 is a highly accurate and stable device. The construction of the M‑920 indicator uses components with a long-term time and temperature stability. Configuration data is backed up and can be recovered after a power failure. The back-up structure enables data recovery in case of a partial loss of data (as a result of e.g. high level electrostatic discharge or high noise of power supplying). Internal CPU provides all functions usually built in electronic flow meters, incl. Liquid temperature measuring, low flow rate correction, frequency response setting, bandwidth of sensitivity setting at low flow rates, etc.
Inputs / Outputs. Flow meter M‑920 is equipped with six isolated outputs and one isolated input as standard. Digital outputs (frequency, pulse and relays) and input is user configurable. Current output 4-20 mA can be used as passive or active type. For communication are available RS232 and RS485 outputs with the Modbus protocol.
Specification
|
Nominal size |
DN10 to DN800 |
|
Nominal pressure |
PN10 to PN40 (depending on diameter) |
|
Flow range |
0.03 to 12 m/s (0.01 to 6000 l/s) |
|
Accuracy |
0.25 % (0.5 to 12 m/s) of reading value 0.003 m/s (0.03 to 0.5 m/s) |
|
Maximal medium temperature |
0 to 80oC (32 to 176oF) for rubber liner 0 to 150oC (32 to 302oF) for PTFE liner in remote version |
|
Ambient temperature |
-20 to 60 °C (-4 to 140°F) |
|
Excitation coils temperature measurement |
-20 to 150 °C (-4 to 302°F) |
|
Power supply |
85 … 264 VAC, 50/60Hz 12V, 24V, 48V DC as option |
|
Power consumption |
10 VA |
|
Liner |
hard rubber PTFE |
|
Electrodes |
CrNi (stainless) steel 1.4571 Hastelloy C276 Tantalum |
|
Measuring tube |
Stainless steel 1.4201, dimensions according to DIN 17457 |
|
Flange |
Steel 1.0402 or higher Dimensions according to EN1092, DIN2501 (BS 4504), ANSI B16.5, Sanitary (DIN11851 or Tri Clamp), flangeless wafer style |
|
Protection category |
Compact version: IP67 |
|
Outputs |
Frequency 0 to 12 kHz with programmable flowrate and function Pulse 0 to 500 Hz with programmable volume, function and pulse width Relay contacts 100V/0.5A with programmable function Current loop 4 to 20 mA with programmable flowrate and function |
|
Input |
Digital input with programmable function |
|
Communication |
RS485, RS232 |
|
Displayed values |
Flowrate (m3/h, l/s, US.Gal/min, user) Volume (m3, l, US.Gal, user) Positive, total, negative and 2 auxiliary (clearable, daily) volume |
|
Control |
Keyboard Magnetic pointer RS232 and RS485 (Modbus) |
|
Low-flow cutoff |
Programmable value |
|
Time constant |
Settable in range 1 to 20 s |
|
Other features |
Test of excitation coils, status of pipe line and electronic unit Empty pipe detection Diagnostic of internal temperature and power supply voltages Real time circuit for datalogging Datalogger memory up to 15000 values (programmable sample rate) Registration of min. and max. flowrate including date and time Sensor has third grounding electrode as standard |
|
Conformity requirements |
LVD (safety) according to EN 61010-1, EN61010-1/A2 PED according to directive 97/23/EC EMC according to EN 61000 part 3-2, 3-3, EN 61000 4-3, 4-4, 4-5, 4-6, 4-8, 4-11, EN 61000 part 6-2, EN 50081-1 |
Accessories
Accessories (included)
| Operation manual | 1 pc |
| Calibration certificate | 1 pc |
| Aplication software | CD ROM |
| RS232 cable | 1 pc |
Comparison among M910/M910E/M920
|
Feature |
M-910 |
M-910E |
M-920 |
|
Accuracy |
0.5% |
0.5% |
0.25% |
|
Measuring range |
0.1 – 10 m/s |
0.1 – 10 m/s |
0.03 – 12 m/s |
|
Max. liquid temperature with rubber liner |
70°C |
70°C |
80°C |
|
Max. liquid temperature with PTFE liner |
130°C |
130°C |
150°C |
|
Temperature measuring |
- |
- |
-20°C- +150°C |
|
Empty pipe detection |
- |
- |
+ |
|
Pulse output |
0 – 50 Hz |
0 – 50 Hz |
0 – 500 Hz |
|
Remote control |
RS232, RS485 |
RS232 |
RS232, RS485, Modbus |
|
Keyboard |
+ |
- |
+ |
|
Auxiliary (clearable) volume counters |
1 |
1 |
2 |
|
Power supply |
115/230V auto |
115/230V manual |
85 … 264 V |
|
Error detection through digital output |
- |
- |
+ |
