27
7
SPECIFICATION
Overall Specification
Range (based on potassium hydrogen phthalate calibration
standards):
7320 100 (low range) ........ 0 to 20 mgl
–1
C
7320 200 (high range) ...... 0 to 100 mgl
–1
C
7320 300 (coagulate dose) 0 to 100 mgl
–1
C
Linearity:
Low range: ........................ 0.5 mgl
–1
C
High range: ........................ 2 mgl
–1
C
Reproducibility:
Low range: ........................ 0.25 mgl
–1
C
High range: ........................ 1 mgl
–1
C
Inferred Units
Absorbance Units/metre
Colour °H
Coag. Dose mgl
–1
mgl
–1
T.O.C.
Maximum current output
scale expansion:
Low range: ........................ 0 to 2 mgl
–1
C
High range: ........................ 0 to 20 mgl
–1
C
Display Resolution:
Low range: ........................ 0.01 mgl
–1
C
High range: ........................ 0.1 mgl
–1
C
Reproducibility: ....................... ±3% of reading.
Response
time: ....................... Normally three minutes for
90% step change depending
on signal damping factor.
Sample
flow-rate: .................... 0.5 to 5 l/min (free of air
bubbles). A higher minimum
flow-rate is required at high
turbidity levels when using the
high range sensor.
Sample temperature: .............. 0 to 40 °C.
Sample pressure: ................... 3 bar maximum.
Lamp life: ................................ Rated by the manufacturer at
1.2 x 10
9
flashes per min.
(10 years continuous
operation at the rate of one
flash at 6 second intervals
(typical) equates to 5.2% of
the rated lamp life).
Display:
Measured value: ............... 4-digit backlit LCD window.
Information: ....................... 2 x 16-character dot matrix,
backlit LCD window.
Current output: ........................ 0 to 10, 0 to 20 and 4 to 20mA.
Maximum load
resistance: ....................... 750 ohms.
Accuracy: .......................... ±0.25% of FSD or ±0.5% of
reading.
Diagnostics: ............................ Out of sample.
Lamp disabled.
Loss of signal.
Electronic failure.
Set points and relays:
Number of setpoints: ......... Programmable
over
the
instrument range.
Relay contacts: ................. single pole changeover.
Diagnostic relay: ............... Out of service, single pole/
single contact.
Rating: ............................... 250V AC, 5A maximum
noninductive.
Internal wiper cleaning
system: .................................... Programmable operation
frequency 15, 30, 45 & 60
minutes. 2, 4, 6, 12 & 24 hours.
Power supply: ......................... 100 to 130V AC and 200 to
260V AC, 50 to 60Hz.
Power consumption: ............... Less than 15W.
Environmental data:
Operating temperature: ..... 0 to 40 °C.
Protection: ......................... IP65 enclosure.
Operating humidity: ........... Up to 95% non-condensing.
Maximum distance between
transmitter and sensor: ......... 200mm to 750mm
Overall dimensions:
Transmitter: ....................... 252mm wide
453mm high
133mm deep
Sensors:
Low range: ................... 327mm wide
410mm high
High range: .................. 408mm wide
373mm high
191mm deep
Weight (ex packing):
Transmitter: ....................... 11kg
Sensor: .............................. 6kg
