HORIBA TPNA-500 Automatic total nitrogen/phosphorus monitor

Model

TPNA-500

Dimensions *¹

460 (W) mm × 385 (D) mm × 1600 (H) mm

Mass

Approx. 87 kg

Power supply

100 V to 240 V AC ±10%, 50 Hz/60 Hz

Power consumption

100 V to 240 V AC: Approx. 250 VA

Performance

Measurement
range *²

Total nitrogen: 0 mg N/L to 2/5/10/20/50/100/200/500/1000 mg N/L
Total phosphorus: 0 mg P/L to 0.5/1/2/5/10/20/50/100/250 mg P/L

Repeatability

Within ±3% of the full scale
(Total nitrogen full scale: 50 mg N/L or less, total phosphorus full scale: 10 mg P/L or less)
Within ±5% of the full scale
(Total nitrogen full scale: 100 mg N/L to 1000 mg N/L, total phosphorus full scale: 20 mg P/L to 250 mg P/L)
Both with standard solution

Measurement
principle

Total nitrogen: Alkaline potassium persulfate, ultraviolet oxidative dissolution -
ultraviolet absorption spectrophotometry
Total phosphorus: Potassium persulfate, ultraviolet oxidative dissolution -
Molybdenum blue spectrophotometric method

Number of
measurement
points

One point (standard), two points (option)

Number of
measurement
ranges *³

One range (standard), 2 ranges (option)

Measurement
cycle

60 min

Installation
conditions

Ambient
temperature

2℃ to 40℃

Ambient humidity

Relative humidity 85% or less (no condensation)

Ambient
environment

• Indoor installation type

• Transient overvoltage of main power supply: Overvoltage Category II (EN61010- 1), Pollution Degree 2

• Flat surface that is not subject to vibration and external shock

• No dust, mist, or corrosive gas is present in the atmosphere

• Under atmospheric pressure

• No direct sunlight

• Well-ventilated area

Measurement
conditions

Sample water
conditions
*^4, *^5, *^6,*⁷

Temperature

2℃ to 40℃ (no freezing)

Flow rate

• 0.5 L/min to 5 L/min (when OF-3 is used)

• 5 L/min to 20 L/min(when OF-30 is used)

Pure water/tap
water supply
conditions*⁸

Amount of usage

43 L/month (depending on the measurement range)

Water quality

• When the customer supplies pure water, use the water of class
  A2 or above, as specified in JIS K0557: 1998, which does not contain nitrogen and phosphorus compounds.

• When a pure water unit is used, the tap water criteria defined by the Water Supply Act must be met.

Supply method

Supply by the tank (standard) or continuous supply by the pure water equipment (option)

Supply pressure

0.1 MPa to 0.5 MPa

Input/output
specifications

Analog output

Number of
points

Standard: 4 points
Option (3-component specification/2-point meter specification): 8 points

Type

Standard: 4 mA to 20 mA DC, 0 mA to 16 mA DC
(Set to 4 mA to 20 mA DC at the factory. It can be switched to 0 mA to 16 mA DC from the screen.)
Option: 0 V to 1 V DC, 1 V to 5 V DC

Description

Standard: TN concentration, TP concentration, TN load, TP load, flow rate per hour
Option (3-component specification): COD concentration, COD load, COD instantaneous concentration
Note: The COD output settings depend on the equipment
conditions.

Output
impedance

500Ω or less

Contact output

Number of
points

Standard: 16 points
Option (3-component specification/2-point meter specification): 22 points

Type

No-voltage output contact

Form

Isolated output

Output capacity

250 V AC 3 A
30 V DC 3 A (Only 30 V DC 3 A is available for the “Maintenance” contact)

Status output

Meas., Calibration, Standby, Maintenance, SYNCHRONOUS IDLE
1, SYNCHRONOUS IDLE 2, Power, etc.

Alarm output

Hi limit alarm (TP, TN, COD), H.Hi limit alarm (TP, TN, COD), Load limit alarm (TP, TN, COD), Sample Lack, Lack Blank, Lack Reag.,
Lack Span, Full Drain Tank, Total Alarm 1 to 6, various meter errors, etc.

Analog input

Number of
points

Standard: 1 point
Option (3-component specification/2-point meter specification):
2 points

Type

Standard: 4 mA to 20 mA DC
Option: 1 V to 5 V DC

Description

Flow rate (full scale can be set as desired), UV/COD meter
concentration

Contact input

Number of
points

Standard: 9 points
Option (3-component specification/2-point meter specification): 18 points

Type

No-voltage a contact input (open collector is available)

Form

Isolated input: Common to the (-) side

ON resistance

100 Ω (max.)

Open-circuit
voltage

26 V DC (max.)

Short-circuit
current

13 mA DC (max.)

Function

Meas. Start, Cal. Start, Modify Date, Line Select,
Flow Mainte, Flow Err., Flow Power, Flow No Drain,
UV/COD Mainte, UV/COD Err., UV/COD Power, etc.

Equipment
function

Display

Touch panel type liquid crystal (color)

Load calculation function

Standard: TP/TN load calculation function is provided
Option: COD and 2-point meter load calculation function are provided

Option

Turbidity compensation function is provided (TN)
(Turbidity compensation wavelength: 275 nm)

Memory function

Measurement value: Memory for over 1 year (including the daily and hourly reports)
Alarm history: 500 events
Calibration history: 100 events
Operation history: 100 events
Note: USB external memory device can be used.

Communication function

Standard: RS-485
Option: RS-232C

Communication protocol

Modbus

Printer

Provided (recording paper width: 58 mm) With automatic take-up equipment

Reagent

Reagent A

0.8 mL per measurement (capacity: 1000 mL)

Solution B

0.2 mL per measurement (capacity: 250 mL)

Solution C

0.1 mL per measurement (capacity: 250 mL)

Solution D

0.1 mL per measurement (capacity: 250 mL)

Solution E

0.19 mL per measurement (capacity: 250 mL)

Solution F

0.2 mL per measurement (capacity: 250 mL)

Span solution

50 mL per measurement (capacity: 1000 mL)

Replacement cycle

One month (only under certain storage/usage environment)