SADP Portable Dewpoint Meter Instruction Manual
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Model SADP Automatic Dewpoint Meter Instruction Manual v2.2.2

EU Declaration of Conformity We Of Declare that Model Name: Shaw Moisture Meters Len Shaw Building, Bolton Lane, Bradford, England, BD2 1AF Battery powered moisture analyser comprising a sensor contained within a drying chamber mounted on a transportable instrument casing. Automatic dewpoint meters types SADP & SADP-D Ex II 1 G Ex ia IIC T6 Ga Conforms to the following directives: 2014/34/EU ATEX Directive 2014/30/EU The Electromagnetic Compatibility Directive And designed and manufactured to the following standards: EN 60079-0:2018 Electrical apparatus for potentially explosive atmospheres...

UK Declaration of Conformity We Of Declare that Model Name: Shaw Moisture Meters Len Shaw Building, Bolton Lane, Bradford, England, BD2 1AF Battery powered moisture analyser comprising a sensor contained within a drying chamber mounted on a transportable instrument casing. Automatic dewpoint meters types SADP & SADP-D Ex II 1 G Ex ia IIC T6 Ga Conforms to the following directives: Equipment and Protective Systems Intended for use in Potentially Explosive Atmospheres Regulations 2016:1107 Electromagnetic Compatibility Regulations 2016:1091 And designed and manufactured to the following...

1 Unpacking your Shaw Moisture Meters Model SADP Please examine the SADP dewpoint meter package for any damage or mishandling. If any damage is evident please notify the carrier and the Shaw Moisture Meters representative from where this unit was purchased. You should have received (if ordered): 1 Model SADP dewpoint instrument 1 carry case 1 screwdriver and Allen key 1 instruction manual 1 pressure dewpoint circular calculator 1 two metre length of PTFE tubing If anything is missing please contact your distributor immediately. 1.1 General Description The SADP and SADP-TR are battery...

SADP-(r) P (Purple) S (Silver) R(Red) G (Grey) B (Blue) Range -100 °C to 0 °C dewpoint -100 °C to -20 °C dewpoint -80 °C to -20 °C dewpoint -80 °C to 0 °C dewpoint -80 °C to +20 °C dewpoint 0-6,000 ppm 0-1,000 ppm 0-1,000 ppm and 0-10 on TR version 0-6,000 ppm and 0-10 on TR version 0-23,000 ppm, (ManualCal) 2.1 Safety All SHAW SADP automatic dewpoint meters are certified intrinsically safe as a standard feature. They must be fully assembled to meet the certification requirements, i.e. they must not be switched on in a hazardous location if any component is missing or removed, e.g. battery...

2.2 Pressure Exposure The maximum pressure to which the telescopic measuring head is exposed must not be more than 0.3 barg, 4.35 psig, 30 kpag or 0.3 kg/cm2g Exposing the measuring head to higher pressures may damage the instrument and result in injury to the operator or other personnel in the area. 3 Installing the Air/Gas Sampling System The piping installation schematic diagram (see section 3.2) shows all components, which could be used in a dry gas measurement application although not all the items shown will be required for every installation. Care should be taken to ensure that the...

There are however, some gases that must be avoided, as they are not compatible with the material of construction of the sensor. Ammonia (NH3), Ozone (O3) and Chlorine (Cl2) must be avoided at all times, even in small quantities. Hydrogen Chloride (HCl) also attacks the sensors very quickly. Some less aggressive acidic gases, such as Sulphur Dioxide (SO2) can be monitored as long as the moisture content is low, generally less than 100 ppm(v). If in doubt, please ask your supplier. Sulfur hexafluoride (SF6) has no effect on the sensor. However, if the gas has been exposed to arcing it is...

3.3 Piping Schematic Component Index 1. Sample Isolation Valve - This is a recommended item as it allows access to the sample system without interrupting the main process line. 2. Filter Unit – A filter unit is recommended when the samples are likely to contain particulate matter. If the air/gas sample contains heavy hydrocarbon condensate, the filter must be of the coalescing type with a drain. The filter unit should be positioned as close to the sample point as practical. 3. Sample Tube – This should be stainless steel for dry air or gas applications but copper or carbon steel can be used...

Connect the SADP. The SADP is not flow sensitive, however the sample flow needs to be enough to fill the sensor head with gas effectively, so anything less than 1 litre per minute would mean that the instrument would take too long to settle to a stable reading. The flow should also not be so high that the gas velocity could physically damage the sensor or cause back pressure in the sensor head, so should not exceed about 8 litres/minute. 3.5 Sample Connections The SADP instrument is supplied with push-on sample connections on each side of the test chamber (head) of the instrument. These...

Between tests, the sensor is not allowed to come into contact with ambient air. The chamber is designed so that the void space and chamber wall surfaces are purged with sample gas before exposure of the sensor, giving faster, more accurate and reliable results. 4 Controls SADP instruments have a single rotary switch to the right of the indicator, which controls the power supply, the battery check and the range selection (in dual range models). The switch positions are marked on the instrument fascia. SADP-D models have a single on/off switch. 5 Normal Operation Brief operating instructions...

6. The instrument reading will move up the scale (wetter) and stabilise. When there is no further change in reading, note the result. If the reading moves up the scale (wetter) and then moves down the scale (drier) then either the sample pipe was not purged enough before the head was raised or the sample is becoming drier during the test. (Perhaps by taking the sample from a pipe in which the gas has been stagnant for some time). If in doubt about the suitability of the sample flow rate or the materials of the sample pipe being used, increase the sample flow rate after the final reading has...