Dissolved Oxygen Meter CD-250

CD-250

Galvanic battery method

Dissolved oxygen: 0.00 - 20.00 mg / L
Saturation: 0 - 200 % (display only)
Temperature: 0.0 - 40.0 °C (display only)

Within ± 2 % / FS (under same temperature conditions)

Within ± 2 % / FS / week (under same temperature conditions)

0.00 - 5.00, 0.00 - 10.00, 0.00 - 15.00, 0.00 - 20.00 (mg / L) (selectable with DIP switch)

No. of contacts: 3
Cleaning contact output (CLN)
Contact type: Semiconductor (SSR) relay, 1a
Contact capacity: AC 200 V, 1 A (alternating current load)
Contact functions: Solenoid valve driving for cleaning

Alarm contact output (RLY1)
  Contact type: Relay contact, 1a (no-voltage contact)
  Contact capacity: AC 250 V, 2 A (resistance load)
  Contact functions: Upper limit alarm, lower limit alarm
  One of the above functions can be selected (selectable with DIP switch)

Contact type: Relay contact, 1c (no-voltage contact)
Contact capacity: AC 250 V, 3 A (resistance load)
Contact functions: Upper limit alarm, lower limit alarm, CLN synchronization (synchronization with cleaning contact output), error alarm output
One of the above functions can be selected (selectable with DIP switch)

No. of contacts: 1
Contact type: Relay contact, 1a (no-voltage contact)
Contact function: Cleaning operation external input
(1) Logical sum with built-in cleaning timer (operates with external input)
(2) Logical product with built-in cleaning timer (operates only within external input range)
(3) Synchronization of built-in cleaning timer with external input
(4) Disabling of built-in cleaning timer
(5) Disabling of external input
  One of the above functions can be selected.

DC 4 - 20 mA, isolated input / output type
Max. load resistance: 600 Ω
Linearity: ± 0.5 % FS

On / off operation, upper limit (H) or lower limit (L) (selectable with internal DIP switch)
Upper / lower limit setting ranges: 0.00 - 20.00 mg / L

0.01 - 1.00 mg / L (± 0.50 mg / L)

Atmospheric calibration, saturated solution calibration, temperature calibration

1) Various error messages

• Calibration error (zero point, gain error, temperature)
• Outside measuring range error (over full scale, under full scale) 2) Alarm on delay: Delay time setting: 0 - 15 minutes

3) Cleaning timer setting: Cleaning cycle setting: 1 - 48 hours
4) Cleaning time setting: 0.1 - 20.0 minutes
5) Post-cleaning standby time setting: 0.1 - 10.0 minutes
6) Transmission output designation setting for holding during calibration and cleaning: Continuous, hold (holding of previous value, holding of arbitrary value) (selectable with DIP switch)
7) Damping factor (response time according to moving average of number of cycles) setting function: 1 - 50 cycles (equivalent to 1 - 20 seconds)
8) Designation of periodic nozzle cleaning operation: Short-term cleaning for prevention of adherence of debris performed at fixed time intervals (for 5 seconds at 1 hour intervals: holding operation during regular operation disabled) (selectable with DIP switch)
9) Measured value shift function: Setting range: ± 2.00 mg / L
10) Transmission output arbitrary holding setting: Setting range: 0.00 - 20.00 mg / L

0.0 - 40.0 °C

0.0 - 5.0 %

-5 to 50 °C, 85 % RH or less

AC 100 - 115 V, 50 / 60 Hz, 7 VA or AC 200 - 240 V, 50 / 60 Hz, 7 VA (as per user instructions)

Outdoor installation type: JIS C0920 protective grade: 3 (rain-proof type)
Installation method: 50 A pole or wall mounting
Case: Cast aluminum alloy (paint color: DIC G-262 or equivalent)
Full cover: Polycarbonate (resin color: DIC G-262 or equivalent)
Hood: SUS304 (paint color: DIC G-262 or equivalent and DIC PART2 2600 or equivalent)
Mounting brackets: SUS304

222 (W) x 180 (H) x 155 (D) (excluding mounting brackets and projections)

Approx. 4 kg