Alpha COND 500 Controller/Transmitter uS / mS / ºC
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Preface This manual serves to explain the use of the Alpha COND 500 transmitter. It functions in two ways, firstly as a step by step guide to help you to operate the transmitter. Secondly, it serves as a handy reference guide. It is written to cover as many anticipated applications of the transmitter as possible. If there are doubts in the use of the transmitter, please do not hesitate to contact the nearest Authorized Distributor.
TABLE OF CONTENTS 1 INTRODUCTION ................................................................................... 4 2 PREPARATION .................................................................................... 5 2.1 2.2 3 INSTALLATION .................................................................................... 8 3.1 3.2 3.3 4 DISPLAY ................................................................................................... 10 KEYPAD ...........................................
1 INTRODUCTION Thank you for selecting an Alpha COND 500 2-Wire Transmitter. This isolated output 4-20mA transmitter is a sturdy microprocessor-based instrument that measures conductivity and temperature and transmits its output via the 2-wire power supply loop. This transmitter has many user-friendly features – all of which are completely accessible through the water-resistant membrane keypad. Your transmitter includes an instruction manual and a warranty card.
2 PREPARATION Remove screws from the four corners at the back of the Transmitter, and remove back cover. Connectors should be exposed as follows: NC NC NC Figure 1 – Connection Guide All wiring is done on 2 detachable connectors: – 1. 9-pin connector (located on SL1 position) for Conductivity electrode and temperature sensor; & 2. 3-pin connector (located on SL2 position) for power supply. Using a suitable screwdriver, loosen screws from top of connector.
2.1 Power Supply Requirements (SL2 Position) The Alpha COND 500 transmitter requires a 12 to 24V DC power supply. Other Transmitters and/or a chart recorder may be connected in the loop. 1. Insert positive loop wire from power supply to pin 1, tighten screw. 2. Insert negative loop wire to pin 2, tighten screw. This wire may be linked to a chart recorder or to negative terminal of power supply. 1 Alpha COND 500 Power Supply 2 Chart Recorder 2.
2.2.2 To connect ATC temperature sensor: For Automatic Temperature Compensated (ATC) Conductivity readings, an in-built temperature sensor is usually integrated in the industrial conductivity electrodes. Otherwise, a separate 100Ω Pt RTD temperature probe can be used. 3 wire temperature sensor 1. Insert the Pt100 input wire to pin 5 of SL1 connector. Tighten the screw. 2. Insert the Pt100 sense wire to pin 6 of SL1 connector. Tighten the screw. 3.
3 3.1 INSTALLATION Mechanical Dimensions Alpha COND 500 2-wire Conductivity Transmitter 3.
3.3 Panel Mount 1. Prepare panel cut-out of 92.0 mm by 92.0 mm Panel (side) 2. Remove back cover of transmitter and slide it through panel cut-out 4. Thread rods through lugs until transmitter is held in place against panel 3.
4 4.1 DISPLAY AND KEYPAD FUNCTIONS Display The LCD has a primary and secondary display. • The primary display shows the measured conductivity value. • The secondary display shows the measured temperature. In Calibration mode, measured conductivity values are displayed here. Primary Display (Upper Display) 16 15 14 1 2 SETUP MEAS 4 3 CAL R. % -.8.8.8 ON mS μS 5 6 7 K= -1.8.8.8 ERR 13 12 11 10 8 °C ATC 9 Secondary Display (Lower Display) 1. SETUP - Setup mode indicator 5.
4.2 Keypad Alpha COND 500 MEAS READY 1413 . μS °C ATC 2-wire Conductivity Transmitter The four-button keypad allows easy and quick operations of the Transmitter. Key Function CAL Brings you directly into the Calibration mode. If you were in Conductivity Measurement mode, press CAL to enter Conductivity Calibration mode.
5 5.1 CALIBRATION Important Information on Transmitter Calibration Calibration should be carried when you are using your transmitter with a new electrode for the first time or when you suspect that the transmitter/electrode is out of calibration. Your transmitter allows you to perform temperature calibration and conductivity calibration.
Table 1 Conductivity Measuring Range Recommended Calibration Solution Range 0.00 Æ 19.99 μS 6.00 to 17.00 μS 0.0 Æ 199.9 μS 60.0 to 170.0 μS 0 Æ 1999 μS 600 to 1700 μS 0.00 Æ 10.00 mS 6.00 to 7.00 mS 0.00 Æ 19.99 mS 6.00 to 17.00 mS 0.0 Æ 199.9 mS 60.0 to 170.0 mS To view current calibration point, see Section 6.8 - Viewing Calibration . Do not reuse calibration solutions after calibration.
5.2 Temperature Calibration You need to perform temperature calibration if your transmitter temperature reading is inaccurate or if the transmitter’s cell constant setting is changed. It is because the transmitter’s temperature offset calibration will be erased once a new cell constant is selected. It is important to ensure that temperature calibration is carried out first prior to conductivity calibration since temperature readings affect the accuracy of conductivity measurements.
5.3 Conductivity Calibration MEAS A 1-point Calibration is required for this transmitter. If the calibration process is aborted, your transmitter will revert to the previous calibration data. 1. Organize your calibration standard solution in two beakers – one for rinsing and the other for calibration. Prepare separate deionized water for electrode rinsing. 2. Rinse the electrode in de-ionized water and then rinse with the calibration standard. 3.
6 ADVANCED SETUP FUNCTIONS The advanced setup mode lets you customize your transmitter’s preferences and defaults. This transmitter features different sub groups that organize all setup parameters. The sub-groups are: 6.1 Range and Zooming Selection Setting Your COND 500 transmitter provides six selections of conductivity measurement ranges to suit your process application needs.
4. 5. 6. For zooming setting, use the ▲ or ▼ keys to set the conductivity low zoom value for the 4 mA current and press the ENT key to confirm. The transmitter now displays the high zoom value setup. Use the ▲ or ▼ keys again to set the conductivity high zoom value for the 20 mA current and press the ENT key to confirm and return to the range setup mode. Press both ▲ and ▼ keys together to return to the measurement mode. 17 SETUP HOLD 0.00 μS L SETUP HOLD 19.
6.2 Temperature Compensation Setting Conductivity readings are affected by temperature. Under varying temperature conditions, use ATC to compensate for the conductivity values. If temperature of sample is constant, and a temperature sensor/probe is not available, Manual Temperature Compensation can be utilized. 6.2.1 Automatic Temperature Compensation For automatic temperature compensation (ATC) selection, connect the ATC sensor to the transmitter, as described in Section 2.2.2. 1.
6.2.2 Manual Temperature Compensation For manual temperature compensation you can set the process and calibration temperatures. This allows calibration at a temperature other than the process temperature. Example: setting a calibration temperature of 25°C lets you calibrate using standard solutions at 25°C, even if your process temperature is different from 25°C. From the measurement mode, o 1. Press the ENT key and use ▲ or ▼ keys to select ‘SEt C’. 2.
SETUP HOLD SETUP SETUP HOLD HOLD SETUP SETUP HOLD . . HOLD °C . ATC SETUP HOLD .
6.3 HOLD Current Setting SETUP When Transmitter is in CAL or SETUP modes, it automatically goes into a ‘HOLD’ mode. HOLD To indicate Transmitter is in ‘HOLD’ mode, output current can be set to 22 mA output by activating the ‘HLD On’. 1. Press the ENT key and use ▲ or ▼ keys to scroll till LCD displays ‘SEt’ in the upper display; and ‘HLd’ in the lower display. Press the ENT key again. 2. Upper display now shows ‘HLd’. Lower display will show either ‘OFF’ or ‘On’.
6.5 Temperature Coefficient and Normalization Temperature Setting Since different process liquid may require different temperature coefficient factor for its temperature compensation calculation, COND 500 transmitter allows 0 to 10% temperature coefficient factor adjustment to cater for your different application needs. You also have the selection of 25.0 °C or 20.0°C for the conductivity measurement normalization temperature. 6.5.
6.6 Cell Constant Setting You can select up to three types of cell constant in the setup mode: - K=1.0, K=0.1 or K=10. From the measurement mode, 1. SETUP Press the ENT key to enter the setup mode. Use the ▲ or ▼ keys to scroll till LCD displays ‘SEt’ in the upper display; and ‘CEL’ in the lower display. 2. Press the ENT key to enter the cell constant setup page. 3. Use the ▲ or ▼ keys to select the desired cell constant and press the ENT key to confirm the selection. 4. 6.
6.8 Viewing Calibration Point This mode lets you view the current calibration point and its range. From the measurement mode of a selected measuring range, SETUP CAL CAL HOLD 1. Press the ENT key to enter the setup mode. Use the ▲ or ▼ keys to scroll till LCD displays ‘CAL’ in the upper display. 2. Press the ENT key to enter the calibration point viewing page. The display will show the current calibration point and its range. 3. SETUP 12.
6.10 Reset Function SETUP The reset function lets you choose to either reset the transmitter’s conductivity calibration only or conductivity calibration plus all setup functions that you might have changed back to factory default settings. However, the temperature compensation setting, as in Section 6.2, will remain unchanged. SETUP From the measurement mode, 1. 2. HOLD Press the ENT key to enter the setup mode. Use the ▲ or ▼ keys to scroll till LCD displays ‘rSt’ in the upper display.
7 FACTORY DEFAULT SETTINGS SETUP PAGE FUNCTION SET rng Selection of effective conductivity range Setting low zooming selection Setting high zooming selection SET °C Selection of Automatic or Manual Temperature Compensation DEFAULT SETTING 1999 uS, r3 0 uS, Lo 1999 uS, Hi AtC On SET HLd Selection of HOLD current to be of 22 mA or the last current output value HLd OFF SET org Selecting Out of Range current output to be constant 3.
8 TROUBLE SHOOTING GUIDE Problem Cause Solution Power on but no display a). Loose connections a). Ensure cables are making good contact. Unstable conductivity readings b). Cables not in correct polarity (+ and – position). a). Air bubbles in probe. b). Dirty probe. b). Re-wire loop cables with correct polarity. a). Tap probe to remove bubbles. c). Probe not deep enough in sample. b). Clean probe and recalibrate. Oscillating temperature readings a).
9 SPECIFICATIONS Cell Constant Conductivity Range Resolution (K) (r1 to r6) 0.1, 1.0 Range 1 = 0 – 19.99 uS/cm 0.01 uS 0.1, 1.0, 10.0 Range 2 = 0 – 199.9 uS/cm 0.1uS 0.1, 1.0, 10.0 Range 3 = 0 – 1999 uS/cm 1 uS 0.1, 1.0, 10.0 Range 4 = 0 – 10.00 mS/cm 0.01 mS 0.1, 1.0, 10.0 Range 5 = 0 – 19.99 mS/cm 0.01 mS 1.0, 10.0 Range 6 = 0 – 199.9 mS/cm 0.1 mS o Temperature Range 0-100 C Temperature Resolution 0.1 C Temperature Relative Accuracy ± 0.
10 ACCESSORIES Replacement Unit Product Description Alpha COND 500 2-Wire Conductivity Transmitter Thermo Scientific Code No. Eutech Code Code No. TSCONCTP0500 ECCONCTP0500 Assembly Accessories Product Description Order Code Conductivity cell, Epoxy body, Graphite sensor, w/3-wire Pt100, k = 0.1 ECCONSEN89X Conductivity cell, Epoxy body, Graphite sensor, w/3-wire Pt100, k = 1.0 ECCONSEN88X Conductivity 2 Cell type probe, up to 20μS; Cell constant, K=0.
11 WARRANTY This transmitter is supplied with a one-year warranty against significant deviations in material and workmanship from date of purchase and a six-month warranty for probe. Each instrument will have a warranty card with a specific serial number. The warranty card must be endorsed by the Authorized Distributor at the point of sale.
Water Analysis Instruments North America 166 Cummings Center Beverly, MA 01915 USA Toll Free: 1-800-225-1480 Tel: 1-978-232-6000 Dom. Fax: 1-978-232-6015 Int’l Fax: 978-232-6031 Europe P.O. Box 254, 3860 AG Nijkerk Wallerstraat 125K, 3862 CN Nijkerk, Netherlands Tel: (31) 033-2463887 Fax: (31) 033-2460832 Asia Pacific Blk 55, Ayer Rajah Crescent #04-16/24, Singapore 139949 Tel: 65-6778-6876 Fax: 65-6773-0836 www.thermo.com/process © 2009 Thermo Fisher Scientific Inc. All rights reserved.
