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Nelson-Jameson 926S Operator's Manual

Chloride analyzer
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Chloride Analyzer
SH-001051-ML Issue 10
Issue Date: 19 Oct 2021
Model 926S
Copyright© 2021
92691018 Nelson Jameson M926S Operator Manual
ECN 3727 & 4453
Operator's
Manual
Nelson Jameson Inc.
2400E Fifth Street
Marshfield
W.I. 54449
Tel. 800 8268302
Nelson Jameson Inc.
Page 1 of 24
Box 647
USA

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Summary of Contents for Nelson-Jameson 926S

  • Page 1 Model 926S Chloride Analyzer Operator’s Manual Nelson Jameson Inc. 2400E Fifth Street Box 647 Marshfield W.I. 54449 Tel. 800 8268302 Copyright© 2021 Nelson Jameson Inc. SH-001051-ML Issue 10 92691018 Nelson Jameson M926S Operator Manual Issue Date: 19 Oct 2021 ECN 3727 & 4453...
  • Page 2 Contents page Introduction ………………………………. Introduction …………………….. Summary of Test ………………………………. Reagents Dilution Storage Purification Instability Installation …………………….. Electrical supply ………………………………. Unpacking ………………………………. Assembly Principles of operation ………………………………. Description Performance characteristics and specifications Range ……………………………………….. ……………………………… Accuracy ……………………………… Linearity Reproducibility ……………………………… ……………………………..
  • Page 3 Contents Page ………………………………. Operation …………... RS232 output and Printing USB B Output …........Operating precautions and hazards Operating precautions ………………………. ………………………………… Hazards Quality control ………………………………… General Quality control checks ………………………. Maintenance ………………………………… General ………………………………………….. Daily ……. Electrode cleaning and replacement Troubleshooting …….....
  • Page 4 Introduction Introduction The M926S is a direct reading, digital chloride analyzer. It is designed for fast and accurate determinations of Chloride levels in samples for which determination in mmol/l is required. Sample volume is 100µl or 20µl and results are displayed on a digital readout in mmol/l (millimoles per litre) Chloride.
  • Page 5 Introduction continued Reagents The following solutions are recommended for use with the M926S. Ordering information is given in Section 10.2. NOTE All reagents contain preservatives where required. Standard Solution is 100mmol/l Chloride as Sodium Chloride. Combined Acid Buffer Solution is a support electrolyte consisting of a mixture of Acetic and Nitric acids which maintains the correct pH for the complete cycle of titrations, and a colloid to hold precipitated silver chloride in suspension.
  • Page 6 Installation Electrical Supply The M926S operates at low voltage (12 Volts d.c.). The universal mains adapter supplied with the M926S comes with a range of plugs to suit most a.c. supplies around the world. The a.c. supply can be in the range 100 – 240V, 50 – 60Hz. Unpacking Upon receipt, the M926S should be removed from its carton and inspected for damage.
  • Page 7 Installation continued Assembly Fit the two shorter, sleeved electrodes into the two rear positions on the underside of the electrode head, Item 3, Figure 2.1. Ensure both electrodes are pushed firmly into their sockets behind the protective rubber boots. Figure 2.1 Electrode Head 1.
  • Page 8 Principles of Operation Description An accurately measured volume of sample (100µl or 20µl set by the 'select' button on the front panel) is added to an acid buffer. The M926S automatically titrates chloride ions by passing a known constant current between two silver electrodes which provides a constant generation of silver ions.
  • Page 9 Performance Characteristics and Specifications Range 10 to 299mmol/l Chloride. Accuracy Results will be within ±2mmol/l (at the 100mmol/l level) of the values obtained by standard wet-chemical methods after allowing for pipetting errors. Linearity Results will be within ±1mmol/l in the range 10 to 299mmol/l or ±1% concentration value whichever is the greater.
  • Page 10 Performance Characteristics and Specifications continued Readout Measurement results are shown in characters 15mm high on a 2.75” 60 dpi backlit LCD screen. Separate areas of the display are reserved for measurement units and instrument status information. 4.10 Warm Up Five minutes warm up is required to meet the stated specification. 4.11 Environmental Conditions Operation Temperature range...
  • Page 11 Operating Instructions Controls and Indicators Press Titrate mmol/l (20µl) Figure 5.1 Front Panel 'titrate' 'condition' 'select' 1. Display screen, 2. button, 3. button, 4. button. condition Pressing this button initiates a conditioning cycle. The purpose of the conditioning cycle is to titrate out any Chloride present in the buffer or beaker, so that the subsequent titration is accurate.
  • Page 12 Operating Instructions continued Rear Panel Components Figure 5.2 Rear Panel and Label detail Power switch On/Off toggle switch that switches the d.c. supply from the mains adapter to the instrument. 0 for Off, 1 for On. Power Input socket for d.c. lead from mains adapter to the instrument.
  • Page 13 Operating Instructions continued Operation Connect power, switch on and allow 5 minutes for the M926S to warm-up. Fill a plastic beaker, supplied, to the mark with combined acid buffer, place the beaker on the platform and raise the platform until it locates in the up position.
  • Page 14 Operating Instructions continued RS232 Output and Printing The M926S has an RS232 output that enables results to be sent to external printers, such as the Portable Printer (780-3999), or other devices with serial inputs. A Serial Cable (780-3051) is provided if you wish to use an external device. The small, round end of the cable fits into the socket on the rear of the M926S (Item 3, Figure 5.2, page 12) and the other end into the serial input socket of the external device - a printer or a computer serial interface.
  • Page 15 Operating Instructions continued USB B Output The M926 also has USB B port that enables results to be sent to computers that do not have an RS232 serial comms. port. A USB cable (001 09 006) is provided. The squarer end fits into the socket on the rear of the M926 (Item 5, Figure 5.2, page 12). A PC utilities communications programme such as HyperTerminal is required to establish a connection with the M926 and receive data from it.
  • Page 16 Operating Precautions and Hazards Operating Precautions The electrodes may go black during use; this will not affect the performance. Only if the M926S will not measure a Standard or sample will it be necessary to clean the electrodes. The M926S requires a warm up period of five minutes to meet the stated specification.
  • Page 17 If you report your results to a Quality Control Scheme ensure that they are informed of the change in method, i.e. Nelson Jameson 926S Chloride Analyzer. Quality Control Checks The following notes are designed to assist you in formulating a Quality Control programme.
  • Page 18 Maintenance General The M926S has been designed to reduce the need for regular maintenance to an absolute minimum. The maintenance required is detailed in Section 8.2, Daily. Refer to Section 10 for ordering information and catalogue numbers of parts used for daily maintenance, which are listed under Equipment Required.
  • Page 19 Maintenance continued Electrode Cleaning and Replacement Equipment Required Electrode polish, soft cloth, 1 x cathode, 1 x anode and 2 x detector electrode. Remove the four electrodes by withdrawing them downwards from the electrode head. NOTE that the anode (Item 2, Figure 8.1) is longer than the other three electrodes. Figure 8.1 Electrodes and Electrode Head 1.
  • Page 20 Troubleshooting Display not illuminated Check that the instrument is connected to a working a.c. supply and that the power switch is in the 'On' position. If the fault persists contact your Nelson Jameson distributor. On-screen messages These self-explanatory alerts may appear at the top of the display screen. Change Buffer / And Condition Shown at start-up and after twenty consecutive Condition Required...
  • Page 21 Spares and Accessories 10.1 Ordering Information When ordering spares or accessories for the M926S please give the following information to your Nelson Jameson representative: - Serial number Catalogue number of part (Cat. No.) Description Quantity required This will ensure that your order is dealt with quickly and efficiently. The number shown in the third column (Quantity) is the quantity of items that are supplied against the stated catalogue number.
  • Page 22 Appendix A Loading USB Drivers for PC’s running Windows versions upto Windows 7 When using a mkIII M926 Analyzer a Driver must be installed, regardless of the manner of connection, to allow the PC to recognise the M926 Analyzer. A PC utilities communications programme such as HyperTerminal is required to establish a connection with the M926 and receive data from it.
  • Page 23 Nelson Jameson Inc. Product Warranty Statement _________________________________________________________________________________________ Warranty Term: 12 Months Nelson Jameson Inc. (Nelson Jameson) warrants, subject to the conditions itemised within this document, through either Nelson Jameson personnel or personnel of its authorised distributors, to repair or replace free of all charges, including labour, any part of this product which fails within the warranty time specified above, appertaining to this particular product.
  • Page 24 Product Warranty Statement (continued) Repairs or replacement of any part failing due to abnormal conditions including the following, are excluded from this warranty: a. Flood, lightning, earthquake, tornado, hurricane, or any other natural or man-made disaster. b. Fire, bombing, armed conflict, malicious mischief or sprinkler damage. c.