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9 SPECIFICATION
Range: .................... Ammonia 0.05 to 2000 mg l
Repeatability: ........ ±2% of reading.
Reproducibility: .... ±3% of reading.
Response Time: .... Less than 10 minutes for 90% step
change.
Millivolt Range: ..... –400 to +400 mV.
Millivolt Resolution:
±0.1 mV.
Control Temperature
Range: .................... 30 to 45 °C
Temperature
Resolution: ............ ±0.1 °C
Displays: ................
Concentration .... 5 digit blue fluorescent.
Information ........ 20 character dot matrix blue fluorescent.
Status indication Two flashing l.e.d's in alarm state.
Single l.e.d. lit when 'Hold' switch
operated.
Single l.e.d. lit when calibration is in
progress.
Single l.e.d. lit when the monitor is 'Out of
Service'
Current Outputs: ... As standard one isolated current output
0 to 1, 0 to 10, 0 to 20 or 4 to 20 mA,
selected via plug in links. Maximum
voltage load 15 V.
Current Output
Span: ...................... Minimum 1 decade of display range,
logarithmic or linear.
Computer Interface:
Optional second current output or
RS422/RS423 serial interface.
Alarms: ................... Two high or low concentration alarms.
Remote calibration mode indication.
Remote monitor 'OUT OF SERVICE'
indication.
Remote 'OUT OF SAMPLE' indication.
All voltage free 250 V, 5 A noninductive
changeover relay contacts.
–1
.
Concentration Alarm
Adjustment: ........... Programmable over range.
Concentration Alarm
Differential: ............ 0 to 5%.
Concentration Alarm
Delay: ..................... 0 to 60 minutes.
Programmable Data
Retention: .............. 3 years.
Calibration: ............ Fully automatic two point, plus manual
Routine Maintenance:
Four weekly: ...... Replenish reagents, clean flow system.
Twelve monthly: Replace plumbing and pump tubing, and
Power Supply: ....... 115 or 240 V, 50/60 Hz, 100 VA.
Power Supply
Tolerance: .............. +6% to –20%.
Isolation Voltage: .. Input, Output and power supply 1.5 kV.
Dimensions:
Height: ............... 890 mm (35.0").
Width: ................ 542 mm (21.3").
Depth: ................ 220 mm (8.7").
Weight ............... 30 kg (66 lb)
Degree of Protection:
Electronic Section:IP65
Liquid Handling: .. Case IP31, critical internal components
initiation on demand.
pump
capstans.
Refurbish
depending on application.
IP65.
sensors
37
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