Moniteur AMI Hydrazine

Description

Microprocessor controlled system for the determination and control of hydrazine or carbohydrazide used as boiler feedwater oxygen scavengers.

Monitor AMI Hydrazine

Complete system on stainless steel mounting panel :

- Transmitter AMI Hydrazine in a rugged aluminum enclosure (IP 66).
- Sensor system
Self-cleaning three-electrode system for determination of hydrazine or carbohydrazide.
- Flow cell
made of acrylic glass with flow adjustment valve, digital sample flow monitor and integrated temperature probe. Sample alkalinization with highly efficient diisopropylamine
- Factory tested, ready for installation and operation.

Specifications :

- Measurement range for hydrazine or carbohydrazide: 0.1 to 600 ppb
- Automatic temperature compensation.
- Automatic, continuous monitoring of sample flow and sensor cleanliness.
- Big backlit LC display for the reading of measuring value, sample temperature, sample flow and operating status.
- Easy user menus in English, German, French and Spanish. Simple programming of all parameters by keypad.
- Electronic record of major process events and calibration data.
- Data logger for 1’500 data records stored at a selectable interval. (Data download to PC requires optional HyperTerminal interface).
- Two current signal outputs (0/4 - 20 mA), galvanically separated from sensor input, for hydrazine or carbohydrazide concentration and temperature or as continuous control outputs.

Hydrazine / Carbohydrazide Measurement :

- Self-cleaning three-electrode system with automatic temperature compensa-tion. Maintenance-free reference elec-trode.
- Range: 0.1 - 600 ppb
- Accuracy:
5% of reading up to 200 ppb
± 15% up to 600 ppb or ± 2 ppb (whichever is greater).
- Stability: ± 5% of reading per month or ± 2 ppb per month (whichever is greater).
Response time: 90 % of change
60 sec after sample entered flow cell
- Temperature measurement NT5K
->Measuring range: up to 60 °C
->Resolution: 0.1 °C
- Sample flow measurement
With digital SWAN sample flow meter and alarm in case of insufficient sample flow.

Transmitter Specifications and Functionality :

- Electronics case: Cast aluminum
- Protection degree: IP 66 / NEMA 4X
- Display: backlit LCD, 75 x 45 mm
- Electrical connectors: screw clamps
- Dimensions: 180 x 140 x 70 mm
- Weight: 1.5 kg
- Ambient temperature: -10 to +50°C
- Humidity: 10 - 90% rel., non condensing

Power supply :
Voltage: 100 - 240 VAC (? 10 %), 50/60 Hz (? 5 %) or 24 VDC (? 15 %)
Power consumption: max. 20 VA

Operation :
- Easy operation based on separate menus for “Messages”, “Diagnostics”, “Maintenance”, “Operation” and “Instal-lation”. User menus in English, Ger-man, French and Spanish.
- Separate menu specific password pro-tection.
- Display of process value, sample flow, alarm status and time during operation.
Storage of event log, alarm log and calibration history.
- Storage of the last 1’500 data records in logger with selectable time interval.

Safety features :
No data loss after power failure, all data is saved in non-volatile memory.
Overvoltage protection of in- and out-puts.
Galvanic separation of measuring in-puts and signal outputs.

Transmitter temperature monitoring : with programmable high/low alarm limits.

1 Alarm relay :
One potential free contact for summary alarm indication for programmable alarm values and instrument faults.
Maximum load: 1A / 250 VAC

1 Input :
One input for potential-free contact.
Programmable hold or remote off func-tion.

2 Relay outputs :
Two potential-free contacts program-mable as limit switches for measuring values, controllers or timer for system cleaning with automatic hold function.
Rated load: 1A / 250 VAC

2 Signal outputs (3rd as option) :
Two programmable signal outputs for measured values (freely scaleable, linear or bilinear) or as continuous con-trol outputs (control parameters pro-grammable).
Current loop: 0/4 - 20 mA
Maximum burden: 510 ?

Control functions :
Relays or current outputs programma-ble for 1 or 2 pulse dosing pumps, so-lenoid valves or for one motor valve.
Programmable P, PI, PID or PD control parameters.

1 Communication interface (option) :
RS232 interface for logger download to PC with Microsoft HyperTerminal or RS485 interface (galvanically separat-ed) with Fieldbus protocol Modbus or Profibus DP.

Monitor Data :

Sample conditions
- Flow rate: approx. 15 L/h
- Temperature range: 15 - 45 °C
- Inlet pressure: 0.15 - 2 bar
- Outlet pressure: pressure free
- pH value: equal or higher than pH 7.0
- Reagent consumption (at 25°C): < 1L diisopropylamine per month

Flow cell and connections
Acrylic glass with safety filter, metering tap and sample tap, inserts for all sensors.
Sample inlet: tube adapter 4 x 6 mm
Sample outlet: tube adapter 15 x 20 mm

Panel :
- Dimensions: 850 x 280 x 200 mm
- Material: stainless steel
- Total weight: 9.0 kg