Table of contents Specification Details Power requirements 5 V supplied by the controller to the light sources Specifications on page 3 Operation on page 18 and detectors General information on page 4 Maintenance on page 23 Process connections ½–in. NPT female standard; adaptable to –in.
Please read this entire manual before unpacking, setting up or operating Certifications 15 year environmental friendly use period this equipment. Pay attention to all danger and caution statements. Accu4 system performance: Failure to do so could result in serious injury to the operator or damage to the equipment. Measurement range 0.000–100.0 NTU;...
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W A R N I N G This symbol, when noted on the product, identifies the location of a fuse or current limiting device. Indicates a potentially or imminently hazardous situation which, if not avoided, could result in death or serious injury. This symbol indicates that the marked item requires a protective earth connection.
1 Calibration hose and funnel 6 Detectors (2x) The Accu4 low-range turbidimeter system includes a Model 8320 turbidity sensor and Model T53 controller. Refer to Figure 1 2 Terminal board...
Make sure that the ambient conditions of the installation location of the Figure 4 Sensor mounting turbidity sensor and controller are within specifications. Refer to Specifications on page 3. Install the turbidity sensor indoors or outdoors where there is little or no ambient vibration.
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Electrical installation • Touch an earth-grounded metal surface such as the chassis of an instrument, a metal conduit or pipe to discharge static electricity from W A R N I N G the body. • Avoid excessive movement. Transport static-sensitive components in Potential electrocution hazard.
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Connect wiring to the controller as shown in the illustrated steps in Figure 5 Wiring overview Figure 6. When wiring is complete, close the controller cover and tighten all the cover screws in order to maintain the NEMA/IP environmental ratings of the enclosure. 1 Analog output connections (2x) 5 AC input power connections 2 RS232 connection (not used)
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Wiring for power Figure 6 General wiring procedure D A N G E R Electrocution hazard. Protective Earth Ground (PE) connection is required. D A N G E R Electrical shock and fire hazards. Make sure to identify the local disconnect clearly for the conduit installation.
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• Rated for at least 60 °C (140 °F) and applicable to the installation Connect the sensor cable environment W A R N I N G • Not less than 18 AWG with applicable insulation colors for local code requirements Potential Electrocution Hazard.
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Table 2 Sensor cable wiring information Figure 7 Connect the sensor cable Terminal block Terminal Wire color Terminal Wire color number number TB-1 Brown Violet Grey Green Blue White Black Yellow Orange Connect the inner shield wires to the grounding strip. Connect the analog outputs (optional) W A R N I N G Potential Electrocution Hazard.
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• The analog outputs are self-powered. Do not connect to a load with Use the relays at either all high voltage (greater than 30 V-RMS and voltage that is independently applied. 42.2 V-PEAK or 60 VDC) or all low voltage (less than 30 V-RMS and 42.2 V-PEAK, or less than 60 VDC).
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Install the sensor in an "in line" process configuration using a closed loop Connect the TTL input (optional) piping arrangement or in a sample bypass line configuration using an W A R N I N G open drain piping arrangement. Refer to Figure 9 Figure Procedure notes:...
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Figure 9 Closed-loop piping arrangement Figure 10 Sample bypass line configuration 1 Outlet (½–in. NPT female) 4 Isolation ball valve (½–in. IPS) 1 Outlet (½–in. NPT female) 6 Process output 2 Isolation ball valve (½–in. IPS) 5 Process input 2 To open atmosphere (to vent for 7 3-way valve (½–in.
Figure 11 Sampling methods Figure 12 Display and keypad 1 Air 2 Sample flow 1 Display 2 Keypad Table 4 Key functions User interface and navigation Function User interface MENU Go to the Main Menu screen and cancel the procedure to change a setting Figure 12 shows the display and keypad of the Model T53 controller.
Startup Note: If the keypad is not used within 30 minutes, except during calibration or while specific controller Test/Maintenance functions are used, the display automatically goes to the Measure screen. Select the language From the Measure screen, push the RIGHT or LEFT arrow to toggle between the two Measure screens.
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ENTER NOTE Select the alphanumberic text that is shown on the top line between measurement updates. of the Measure screen (default = ACCU4). The text can be SCALE Set the analog output range of the analog output. 0mA— a maximum of 8 characters. The selected digit is in square 0mA/4mA 0 to 20 mA.
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Control relay Option Description Set the transfer state of the relay—DE-ENERGIZED Option Description TRANSFER (default) or ENERGIZED. During calibration, the relays PHASE Set the phase for the relay to high or low. HIGH (default) can be held, transferred or kept active. When transfer is —The relay is energized when the measured turbidity is selected, the relays are held at the transfer state.
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sensor or a process upset) from keeping a control relay switched on Prepare 4000 NTU formazin suspension (primary calibration only) continuously. The overfeed timer setting limits how long the relay and its W A R N I N G connected control element stay on independent of the conditions. When a relay overfeed timer is used and it has expired, the relay status flashes on the Measure screen until the overfeed timer is reset.
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the dark, the stock suspension stays stable for a maximum of one 9. Put the calibration funnel in the funnel holder. year. Enter the value of the sample or standard suspension 8. Prepare 20 NTU or 40 NTU standard suspension. a.
2. Push the UP or DOWN arrow to select the option. Calibrate the analog outputs If the analog output connections of the controller are used, calibrate the Option Description analog outputs as necessary. The analog outputs are factory-calibrated. The adjustment range for analog output calibration is ±2 mA. Disabled The passcode does not have to be entered to change the configuration settings, do calibrations or go to the TEST/MAINT Note: If an analog output is configured to be 0–20 mA, 4 mA and 20 mA (not the...
3. Remove the baffle assembly from the flow chamber. It is "keyed" with Replace a light source or detector a slot and guide rib on the left side to fit only one way in the flow D A N G E R chamber.
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Contact technical support if the troubleshooting steps below do not Table 5 Status messages (continued) correct the problem. Message Description Solution Table 5 Status messages CHAMBER The sensor cable wiring Make sure that the sensor cable UNKNOWN is not connected or not wires are connected correctly.
Table 5 Status messages (continued) Option Description Message Description Solution OUTPUT 1 (or 2) Set the analog value that is present at the analog output —0 (or 4) to 20 mA (default = 4.05 mA). Use this option RLY (A, B, C, The relay is de- to confirm operation of the connected devices.
5. Drain the flow chamber. Replacement parts a. Turn the internal 3-way valve handle to the CALIBRATE position. Description Quantity Item no. b. Remove the funnel from the holder and hold it below the sensor height to drain any sample that is still in the sensor. Model T53 controller: c.
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Replacement parts and accessories (continued) Description Quantity Item no. O-ring, light source or detector 5H1251 Retainer clip for light source or detector 8220F1078 Accessories Description Quantity Item no. Model 8320 turbidity sensor: Bubble trap, head regulator 4668000 Lubricant, silicone 6M0920 Flask, class A, 2 L 2489454 Formazin, 4000 NTU...