Related Manuals for Shaw SADP
Summary of Contents for Shaw SADP
- Page 1 Model SADP Automatic Dewpoint Meter Operating Instructions SADP_Operating_ Instructions_0114...
- Page 2 Moist ture Meter rs (UK) Ltd Len S Shaw Build ding Bolton Lane Bradford BD2 1AF England t. +44 ( (0) 1274 73 33582 f. +44 ( (0) 1274 37 70151 e. mail@ @shawmete ers.com www.s shawmeter s.com SADP_ _Operating g _ Instructi...
- Page 3 Unpacking your Shaw Moisture Meters Model SADP Please examine the SADP 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): ...
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Page 4: Table Of Contents
Gaining Access to the Sensor Additional Information Anti-Static Sample Case Desiccant and Head Seal Batteries and Battery Check Temperature Pressure Response Time Guarantee 10.0 Basic Definitions 11.0 Electrical Function Check 12.0 Problem Guide 13.0 Hygrometric Equivalents 14.0 SADP Specifications SADP_Operating_ Instructions_0114... -
Page 5: General Description
The SADP & SADP-TR are battery operated portable dewpoint meters designed for spot checks or continuous use. The instrument provides direct indication in dewpoint temperature and parts per million on a 12cm analogue scale. SADP-D versions perform the same function but display only Dewpoint on a LCD display. -
Page 6: Safety Information
FM Coding - CLASS I, ZONE 0 AEx ia IIB+H2 T6 It is the responsibility of the user to ascertain the suitability of the SADP for use in hazardous areas. Risk assessments should be performed prior to use, taking into account the SADP certifications, the location and the gas being monitored etc. -
Page 7: Installing The Air/Gas Sampling System
Care should be taken to ensure that the sample presented to the SADP is not contaminated with any component that will damage, contaminate or affect the SADP in a way that will impair the unit’s accuracy. -
Page 8: Piping Installation Schematic
Flow Control Valve – This can be a separate item or combined with the flow indicator (8). Sample Connection SADP. Flow Indicator – The recommended sample flow is 5 to 8 L/M. Sample Exhaust – The exhaust is vented to atmosphere or returned to an atmospheric pressure line. -
Page 9: Purging The Sample Connection
(4) into SADP line. Allow the air/gas to exhaust through the sample connection (9). The SADP is not flow sensitive however the sample flow needs to be enough to purge the sensor head effectively, so anything less than 1 litre/min would mean that the instrument would take too long to settle to a stable reading. -
Page 10: Normal Operation
6.0 Normal Operation Brief operating instructions will be found on the label fastened to the top of the instrument cabinet. The standard test procedure is as follows: 1. Switch the instrument on, and check the battery condition. 2. At the sample point to be tested open the sample valve or regulator slightly and check that no dirt or condensate is expelled. -
Page 11: Calibration Checking
This means, for example, that the Grey Spot sensor used in the Model SADP-G for the range -80 to 0 C dewpoint will read 0 deg C when exposed to gas at 0 deg C dewpoint, but will continue to read 0 deg C dewpoint when it is exposed to wetter gas. -
Page 12: The Sensor
The Shaw High Capacitance Sensor has been undergoing continuous development since it was invented by Mr. J. L. Shaw in the late 1940’s. Protected by world patents the sensor is manufactured by a unique automated process, which results in a long life device with fast response, high accuracy and good stability. -
Page 13: Additional Information
The carrying case supplied with the SADP is manufactured from anti-static material. The SADP unit can be fully operated within the carrying case. It is recommended that the SADP is left in the carrying case whenever in the hazardous area. -
Page 14: Temperature
The response time of any water vapour pressure detector will naturally be very much quicker from dry to wet, than from wet to dry. This is the reason that the Shaw Automatic Dewpoint Meter is so successful. The sensor is kept in a dry condition when it is not in use, and therefore results are obtained in the quickest possible time. -
Page 15: Basic Definitions
10 BASIC DEFINITIONS WATER VAPOUR PRESSURE: is the pressure exerted by the water vapour contained in any mixture of gases. The total pressure exerted by the gas mixture is the sum of the pressures exerted by its components — including the water vapour. Water Vapour Pressure varies in direct proportion to the total gas pressure. -
Page 16: Electrical Function Check
11 Electrical Function Check If there is any doubt about the functioning of the Analyser, the following test may be carried out. (This must always be carried out in the Safe Area) Switch the instrument off. Check that the meter reading is accurately at the zero (left-hand) end of the scale. If not, adjust the reading by means of the plastic screw on the meter face. -
Page 17: Problem Guide
12 Problem Guide PROBLEM CAUSE SOLUTION ERRATIC READINGS Static on Indicator Moisten indicator face with 50/50 mixture of detergent & water, or use proprietary anti-static cleaner. DO NOT POLISH INDICATOR FACE. FULL SCALE READING Wet gas Stop gas supply & switch analyser off. Short Circuit Sensor Disconnect plug from sensor &... - Page 18 SLOW RESPONSE Free Water in System Check drain & inspection ports in the main system & sample pipe work. Wrongly Sized or Refer to Section 3.2 of manual. & ensure sample Incorrect Material on tube material & flow rates are as Sample Lines recommended.
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Page 19: Hygrometric Equivalents
13 Hygrometric Equivalents SADP_Operating_ Instructions_0114... -
Page 20: Sadp Specifications
-80 / 0 deg.C DP, 0 - 6000 ppm, and 0-10 on TR version, (auto-cal) Blue : {Bl} -80 / +20 deg.C DP, 0 - 23,000 ppm (manual-cal) Analogue versions SADP {r}: suffix TR if required for G and R To Order: ranges only. - Page 21 SADP_Operating_ Instructions_0114...