Summary of Contents for Martek MARK 22
- Page 1 ® MARTEK INSTRUMENTS, INC. MARK 22 IN SITU CALIBRATOR OPERATION MANUAL Rev. NC(1) - 10/04...
- Page 2 Returned units must be packed as well as they were when first shipped. If possible, use the original packing. Do not return detachable cords or manuals with the unit. MARTEK reserves the right to void this warranty if the product has been subjected to misuse, neglect, accident, improper installation or application, and for consumable items such as batteries, membranes, or solutions.
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Page 3: Table Of Contents
CHAPTER 1 INTRODUCTION PAGE Section 1.0 - What Is A Calibrator? ....................1 1.1 - How The Mark 22 Can Benifit You ................1 1.2 - How To Read The Manual ................... 1 CHAPTER 2 OVERVIEW Section 2.0 - Operatinal Overview ....................2 2.1 -... - Page 4 TABLE OF CONTENTS CHAPTER 5 CALIBRATION PAGE Section 5.0 - Why Should You Calibrate The Mark 22? ..............24 5.0.1 - Materials Required For Calibration ................24 5.1 - Temperature Calibration ..................... 24 5.1.1 - Auto Temperature Calibration ..................25 5.1.2 - Manual Temperature Calibration ................
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Page 5: Introduction
Mark 22 in applications in which a date the performance and accuracy of on- hardcopy record of the data stored in the line, process water monitoring instruments. -
Page 6: Chapter 2 Overview
4. After all sensor and power connections PERATIONAL VERVIEW have been made, the Mark 22 can be op- erated. Flip the switch labeled POWER A short description of the different fea- to the UP position ( power on ). Flip the tures of the Mark 22 is given below. - Page 7 OVERVIEW - 2 tion legends and the associated mode cates that the Mark 22 is now in the Log have the same color legend and border. Mode of operation. Depress the LOG key again, and observe that the black square...
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Page 8: Quick-Cal" Calibration Procedures
However, before performing a LECT key and entering 1.0000 µS/cm. calibration of the Mark 22 using this proce- 7. At this point, the Mark 22 is now cali- dure, it is recommended that you review brated for conductivity for any sensor uti- Chapter 5 ( CALIBRATION ) of this manual. -
Page 9: Specifications & Setup
(17.8 x 16.5 x 10.1 cm) o u t p u t . L W H Case Weight: 6 lbs. (2.1 kg) Power Requirement: 6 Volt DC power 120 or 230 Volt AC when the factory supplied battery charger is used. Martek Instruments, Inc. -
Page 10: Accessories And Sensors
3 - SPECIFICATIONS AND SETUP CCESSORIES AND ENSORS The Mark 22 In Situ Calibrator comes complete from the factory with the following accessories: Mark 22 with Carrying Battery Charger Recorder Cable Strap (P/N 182-10) (P/N 221042) (P/N 603050) Conductivity Interconnect... - Page 11 SPECIFICATIONS AND SETUP - 3 In addition, the following sensors and accessories may also be purchased from Martek for use with the Mark 22: Conductivity Reference pH Sensor (P/N 182-24S) Temperature Sensor Cell (P/N 182-21, 0-50uS/ (P/N 182-24T) cm or P/N 182-22,...
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Page 12: Setting Up The Mark 22
ETTING There are four circular connectors and a battery charger input jack located on the left side of the Mark 22 Readout Module. See Fig- ure 3.1 below for connector location. Figure 3.1 - Mark 22 Connector Locations Martek Instruments, Inc. -
Page 13: Connecting The Conductivity Sensor
Martek connect the appropriately marked cables of pH sensor to the Mark 22 Calibrator. the reference cell to the Mark 22. Make sure The pH sensor should be immersed in a the correct cable is inserted into the correct... - Page 14 45 - 150 ml/minute to avoid a streaming ef- fect. The Martek temperature sensor or con- ductivity reference cell must be connected to the Mark 22 and subjected to the same sample stream if temperature - corrected pH data is to be obtained.
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Page 15: Connecting The Temperature Sensor
Mark 22 internal batteries, it is important to follow these two steps: A ) With the Mark 22 turned OFF, plug the charging plug into the charging jack. B ) Plug the charger into a wall outlet that carries the same voltage as that listed on the battery charger. -
Page 16: Operation
Display Mode. In If the lamp is activated, the Mark 22 will oper- the Display Mode the Mark 22 cycles through ate for approximately 8 hours before requiring three screens: (1) corrected conductivity, raw recharging. -
Page 17: How To Use The Keys
Mark 22 be calibrated. lect a particular sensor measurement for be If the Mark 22 has not been calibrated, proceed to continuous display and monitoring by the the chapter on calibration after reading this sec- Mark 22. -
Page 18: Setup Mode
If the UP AR- its when adjustment of a numeric input en- ROW key is depressed, the Mark 22 will The DOWN ARROW Key try is required. move the decimal point shown in the display moves the blinking display up through the to the right. -
Page 19: Cell Mode
10 Key selects the Cell constant for Cell #4. Menu the user must depress the EXIT key. The Cell Screen appears as follows: which will return the Mark 22 to the normal display monitoring mode. The options pre- CURRENT CELL #1 sented in the SETUP menu are discussed in Section 4.2 and in the chapter on CALIBRA-... -
Page 20: Print Mode
Formulas data information to the printer port under normal conditions. Pressing the PRINT key will allow the Mark 22 to print what has been When utilizing conductivity and pH sen- stored in memory when it is hooked up to a sors in ultrapure water, compensation formu- computer or printer. - Page 21 OPERATION - 4 sample temperatures are rarely maintained The slope coefficient a can also be ad- at precisely 25 degrees C. The Mark 22 is ca- justed within the Mark 22 software. The co- pable of providing raw parameter data, tem- efficient is typically 2.0%/°C for neutral salt...
- Page 22 Compensation = pH @ Low Temp - pH @ High Temp Coefficient High Temp - Low Temp For example, if we use 1 ppm ammonium hydroxide in ultrapure water, the above for- mula would be as follows: Martek Instruments, Inc.
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Page 23: How To Select The Conductivity "K" Factor
"K" factor until it reads "K .01". this way, fine adjustments can quickly be Now press the SELECT key. The display will made to the Mark 22 to match the cell con- now indicate: stants of different conductivity sensors. -
Page 24: How To Log Data
In mined by the number of scans and the period addition, the Mark 22 can be programmed between scans. The Mark 22 can hold a total of to start logging at a pre-determined time and 371 scans. -
Page 25: Print Function Setup
ASCII RS 232 digital input. To down-load the stored data CAUTION! ALL in the Mark 22 requires that you set your com- puter or printer with the same data flow con- LOGGED DATA WILL figuration utilized by the Mark 22. The Mark... -
Page 26: How To Use The Recorder Output
Press the SELECT key again and the Mark 22 displays: There are some instances when it is desir- able to hook up the Mark 22 to a strip chart or line recorder in addition to or to substitute ZERO FULL for the Mark 22’s own internal logging capa-... - Page 27 OPERATION - 4 Figure 4.3 - Analog Recorder Output Hook-Up Martek Instruments, Inc.
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Page 28: Calibration
5 - CALIBRATION 4. pH Buffers 7 and either 4 or 10. HOULD ALIBRATE To maintain the specified measurement accuracy, always calibrate the Mark 22 in the range of the measurement to be performed. Electronic instruments that measure Pre-mixed conductivity solutions may be... -
Page 29: Auto Temperature Calibration
Also, make sure the temperature sen- At this time, the Mark 22 acts like a volt- sor is connected prior to operating the Mark meter and shows a varying voltage. An in- 22 ( section 3.2.3 ). - Page 30 HI TEMP STANDARD eter. Then will ask you to: NOTE: The freezing point of water does not ac- tually have to be reached for the Mark 22 to de- termine the sensor’s reading at 0 C. As long as HIT KEY W/STABLE the temperature low point is lower than that of +0.7883 VOLT...
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Page 31: Conductivity Calibration
(P/N 603051) to simulate a conductivity reference cell. To use CONDUCTIVITY this cable, connect it to the Mark 22 and in- sert the Martek Zero Calibration Plug (P/N 400550). [ Select the cell constant you will be measuring with (i.e. -
Page 32: Conductivity Span Calibration
SPAN cm solution. CONDUCTIVITY First, remove the conductivity reference cell that is hooked up to the Mark 22. If not and the "SPAN" prompt will be flashing. already connected, hook up the conductiv- ity interconnect cable (P/N 603051) with the span calibration plug (P/N 400549) to the Mark 22. - Page 33 K = 0.0100 ductivity. The conductivity reference cell can then press the CELL key again to return to now be attached to the Mark 22 and mea- the monitoring mode. surements taken. However, before doing so,...
- Page 34 Once the last digit has been entered, the tical, fill the cell completely with solution and Mark 22 will automatically return to the cali- seal the ends. bration menu: Now, enter the calibration mode and choose the "COND"...
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Page 35: Ph Calibration
"pH" option. The display will prompt mal water applications, ultrapure water has with the following: very low ionic activity making it difficult to measure pH accurately. The Mark 22 can use a variety of pH electrodes from different ZERO SPAN manufacturers. -
Page 36: Ph Span Adjustment
Move back to a and the "SPAN" prompt will be flashing. previous digit by pushing the EXIT key. Once the span point has been entered, the Mark 22 will automatically respond with the follow- ing display: 5.3.2 pH Span Adjustment... -
Page 37: Frequency Of Calibration
Move back to a previous digit by pushing the EXIT key. Once Standard operating procedures for cali- the last digit has been entered, the Mark 22 bration vary with each organization. Martek will automatically respond with the follow- Instruments recommends calibration of the... -
Page 38: Maintenance & Troubleshooting
If water ex- posure is a problem, a large plastic zip-lock bag can be used to protect the Mark 22 from 1. The Mark 22 display indicates "No pH exposure. or Conductivity Sensor connected" even... - Page 39 MAINTENANCE & TROUBLESHOOTING - 6 into the Mark 22. Also make sure that the cell being used is clean and has no air bubbles in it when the sample passes through it. 5. pH readings are erratic and “noisy” when pH sensor is installed in adaptor p l u g .