Oxyguard PPB
Contents
1. Information The OxyGuard PPB is specially designed for the measurement of dissolved oxygen inboiler feed water condensate district heating water and other types of water with low dissolved oxygen content The analyzer consist of a probe mounted in a measurement chamber and a transmitter unit with alarm and analogue output signals The unit is mains powered Oxyguard PPB for the measurement of Dissolved Oxygen at ppb levels microgram per liter DO TRACE ANALYSER ppb ug l Ko e CAL ON a CALINIT SET 7 The instrument is extremely easy to use and maintain no special training being needed The probe a galvanic cell that generates a voltage in the presence of oxygen never needs replacing and is insensitive to wide changes in sample flow and temperature The system exhibits excellent accuracy long term stability and response time paab TEKNO TRADING Probe This is manufactured almost entirely in stainless steel to give the greatest possible mechanical stability and maximum protection from electrical interference The sensor itself uses new technology The result is a probe with short response time and excellent calibration stability The very robust membrane can if necessary be changed in a few minutes Measurement Chamber This is manufactured from clear acrylic plastic with stainless steel fittings The clear plastic permits observation of the probe an advantage when removing air bub2. CD display digit height 12 mm Alarm 1 high alarm Potential free change over switch max 200 VA Encapsulation IP 65 Operating temperature 5 C to 60 C Practical System Performance Accuracy Error max 0 5 ppb or 3 Repeatability Better than 0 5 ppb or 2 Conformity Linear Limit of Detection 0 8 ppb Long term stability 0 5 ppb 1 month Commissioning Straightforward Probe renovation Easy N B only necessary if the membrane is damaged N B The system has EMC CE approval Standard Accessories 2 m flexible sample tubing Membranes User Manual O rings Electrolyte Ordering Information L01S1 Stationary PPB oxygen meter L01S2 Stationary 2 range PPB oxygen meter Spares LOTXPB PPB Probe LO1EL50 50 ml PPB electrolyte LO1XMEM Set of membranes and O rings paab Paab Tekno Trading AB Box 608 Tingvallastrand 12 661 29 S ffle Sweden TEKNO TRADING Tel 46 533 150 60 Fax 46 533 169 31 info paab com www paab com
3. bles after calibration All the probe and measurement chamber materials can withstand high radiation levels and can be used in nuclear power stations Transmitter This consists of a high quality industrial type instrument amplifier in an IP65 cabinet with digital display 0 20 or 4 20 mA analogue output that is galvanically isolated from the input and a high level alarm with potential free change over contacts A special circuit disenables the alarm during calibration This is controlled by a timer but can be reset manually Commissioning and Use Procedures for the connection and use of the instrument are straightforward as verified by an independent testing institute KEMA Holland Calibration is performed in air and usually takes about 1 minute This short time ensures negligible contamination of the probe by atmospheric air resulting in a return to accurate measurement in low ppb oxygen concentrations in the course of a few minutes Service and Maintenance The probe is constructed to operate for many years without needing maintenance The choice of anode cathode and electrolyte is such that only the anode is consumed and this has a nearly infinite calculated lifetime at 10 ppb The electrolyte remains unaltered and does not need changing as in conventional systems Practical tests indicate that the probe used at 10 ppb will only need service if the membrane should be damaged and this is very seldom since the membrane is very r
4. obust it is 0 05 mm thick If membrane replacement should be necessary the procedure is easy and can be performed by anyone without prior training paab TEKNO TRADING Transmitter Unit Measurement Chamber with Probe All dimensions in millimeter approx 150 2 holes 6 mm dia 76 Mounting hole centers 161 x 220 mm lt approx 128 N B max depth for panel mounting Installation Example with Sample Cooler Sample Inlet Temperature OxyGuard EPB Valve Indicator Sample Inlet Cooling Water Outlet gt Sample Drain Cooling Water Inlet Valve Sample Three Way Cooler Valve Cooling Water Inlet Bypass Drain gt paab TEKNO TRADING Teknisk specifikation Probe Type Self polarizing galvanic membrane covered amperometric cell Sample temperature 5 C to 50 C Sample flow Depends on oxygen content and temperature min 50 ml min max 2000 ml min Sample pressure Atmospheric Connections 6 mm compression ring fittings Response Time 20 sec for 0 5 and 0 80 ppb up scale and down scale From 1 minute in air calibration to 100 ppb in approximately 40 sec and to 10 ppb in less than 3 minutes Transmitter Measuring range 0 100 ppb or on request 2 range version available Output 0 4 20 mA isolated from input Indicator L
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