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Table of Contents
Summary of Contents for Martek Mark 25
- Page 1 Martek Instruments, Inc. Mark 25 Dissolved Oxygen Analyzer Instruction Manual...
- Page 2 Customers desiring to return a product to MARTEK for repair should contact the Service Department by telephone at (800) 628-8834 or fax (919) 790-2375 or via our website at www.martekinstruments.com to obtain return authorization.
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Page 3: Table Of Contents
MARK 25 TABLE OF CONTENTS 1. Introduction Page 1.1 Description ……………………………………………………………………………….3 1.2 Specifications ……………………………………………………………………………4 2. Installation 2.1 Panel Cutout for Monitor ..………………………………………………………………5 2.2 Sensor & Flow Chamber Dimensions ..………………………………………………. 5 2.3 Electrical connections to the monitor ……………………………………………….…6 3. Operation 3.1 Keyboard & display ……………………………………………………………………….7 3.2 The CALIB Key...…….….…………………………………………………………………8... -
Page 4: Description
Alarm and recorder wires are easily installed in removable terminal strips. Sensors connect via a DB-9 connector located on the rear panel of the Mark 25 and the sensors mount easily to any flat surface. In addition, Martek offers adapter plates specifically designed to cover the space occupied by other brands of conductivity analyzers. -
Page 5: Specifications
1.2 Specifications Parameter Range Accuracy Resolution Dissolved Oxygen 0-20.00 ppb +0.1 ppb 0.01 ppb 0-200.0 ppb +1.0 ppb 0.1 ppb 0-2.000 ppm +0.01 ppm 0.001 ppm 0-20.00 ppm +0.1 ppm 0.01 ppm Temperature 0-50.0 +0.1 0.01 Power: 97-240 VAC, 50/60 Hz, 24Vdc, fuse protected Recorder Output: Four, scaleable 0-20 mA DC analog &... -
Page 6: Installation
2. Installation 2.1 Panel Cutout for Monitor 2.2 Flow Chamber Mounting Bracket 3.60” 2.20” .266” dia. 3.60” 2.00” 1.25” Panel Cut-out 2.3 Sensor & Flow Chamber Dimensions 2.25” 4.25” 3.50”... -
Page 7: Electrical Connections To The Monitor
RS232 Sensors To set up the Mark 25 for operation, simply plug the sensor connector in, then plug the AC power cord into a properly grounded outlet. If recorder, digital or alarm outputs are to be used, make certain the Mark 25 is unplugged before connecting the cable to the appropriate recorder or computer. -
Page 8: Operation
READ key - When the <READ> key is 3. Operation pressed, the Mark 25 will display rd. If one of the bottom keys is selected, the 3.1 Keyboard and display parameter high-lighted in red will be displayed and its corresponding LED lit. -
Page 9: The Calib Key
Once the sensors have been connected To span temperature, press the to the Mark 25, the power cord can be <CALIB> key, then the <UP ARROW> plugged into any outlet supplying 97-240 key when the temperature prompt is V AC 50/60 Hz power. -
Page 10: Calibrating Dissolved Oxygen
(do). Press the <CALIB> key to select the desired parameter. Calibrating dissolved oxygen follows the same procedure as the temperature The Mark 25 will then display Lo. To calibration. However, there are several select a low set point, press the differences. -
Page 11: Setting Recorder Outputs
At this point, the Mark 25 will display channel viewed is in an alarm state. 000. This is the “balance”. Use the <UP> or <DOWN ARROW> key to change the value in order to make the 3.6 Setting Recorder Outputs... -
Page 12: Setting The Password
<CALIB> key to set and activate the password. 1. Polling - The Mark 25 will provide the digital output only when polled by the Once the password is enabled, the host computer. -
Page 13: Setting The Auto-Ranging Function
<UP> or <DOWN ARROW> key until the Mark 25 displays PEr. 5. Screw the Membrane Ring onto the Outer Body and gently tighten. To return to the monitor mode, press the <RUN> key. 6. Using the dropper from the electrolyte bottle, carefully fill the 3.10 Sensor Design &... -
Page 14: Troubleshooting
To obtain optimum performance from NOTE: Do NOT scrub the platinum the Mark 25, care should be taken to cathode. However, you can polish the ensure the sensor has adequate flow platinum tip using a polishing cloth.
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