Manual

ManualsBrandsXylem ManualsEquipment780 LIQUID SAMPLER

M780GB/0911

MANUAL FORMANUAL FOR

MANUAL FOR

MJK LIQUID SAMPLER 780MJK LIQUID SAMPLER 780

MJK LIQUID SAMPLER 780

ContentsContents

Contents

ApplicationApplication

Application

1 General information page 2

2 Operation 2

MountingMounting

Mounting

3 Specifications 2

4 Mounting 2

5 Terminals 3

6 Examples 3

SettingSetting

Setting

7 Operation 5

8 Start-up 5

9 Sequence 6

10 Adjustment of sequence time 6

11 External sequence 7

12 Example of control with PLC 7

MiscellaneousMiscellaneous

Miscellaneous

13 Maintenance 7

14 Spare parts 8

15 Dimensions 8

Summary of content (6 pages)

PAGE 1
MANUAL FOR MJK LIQUID SAMPLER 780 Contents Application 1 General information 2 Operation page 2 2 Mounting 3 Specifications 4 Mounting 5 Terminals 6 Examples 2 2 3 3 Setting 7 Operation 8 Start-up 9 Sequence 10 Adjustment of sequence time 11 External sequence 12 Example of control with PLC 5 5 6 6 7 7 Miscellaneous 13 Maintenance 14 Spare parts 15 Dimensions 7 8 8 M780GB/0911 1
PAGE 2
General MJK Liquid Sampler 780 is designed to make samples from lakes, rivers, sewage systems, pumping stations etc. It can be used in fixed installations or as a portable unit. The sampler operates from the manual panel, or is controlled from a flowmeter or a timer. The sampler can be connected directly to an MJK 713 Ultrasonic flow converter for flow proportional sampling.
PAGE 3
Terminals The terminals for the electrical connection is found underneath the lid behind the sample glass. The sampler cabinet is opened with the enclosed cabinet key. Connect the sampler in accordance with the diagram. 110 - 120V/220 - 240V AC SUPPLY Examples 12VDC EXT. START EXT. CONTROL SIGNAL EXT. ALARM RESET SAMPLE ALARM STOP Flow proportional liquid sampling together with MJK Flow Converter 713 713. This example show also th econnection of a MJK PRINTER 791 for recording of flow and samlping.
PAGE 4
Operation The sampler is operated on the control panel. The symbols have the following meaning and function. Start/stop of the sampler. The function is an electrical memory function, so the chosen position (start or stop) is maintained also after a power failure. The sampler will continue taking samples or will stop according to the previous position. The green LED indicates that the sampler is on and ready (stand by) when a start signal occurs.
PAGE 5
As shown in the diagram, the compressor starts when the sampler is started. When starting, the valves are switched out to put pressure on the sample glass, to remove any previous sample. The purge time is determined by the timer T1 (purge). There are no dangerous voltages present at the control unit, so it can be touched during operation. When the desired adjustment has been made, depress (“ON/OFF” key) to avoid short circuit during mounting, and the control unit attachment.
PAGE 6
Example of PLC controlled sample The sampler is connected to a PLC. In the example a MITSUBISHI MELSEC F-12R is displayed, but any PLC can be used. Miscellaneous Maintenance The sampler must be kept clean of dirt on the following points: * The sampler glass must be kept clean on the inside * The level electrodes in the top of the sample glass must be cleaned * The sample tube and the outlet tube must be cleaned How often the cleaning is necessary, depends on how often the sampler is used.