1. Manuals
  2. Brands
  3. SENTRON Manuals
  4. Measuring Instruments
  5. SI400 7400-0
  6. Manual

SENTRON SI400 7400-0 Manual

Si line ph
Hide thumbs
Table of Contents

Advertisement

Quick Links

For products:
SI400
7400-0xx
SI600
7600-0xx
SI line pH METER MANUAL

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the SI400 7400-0 and is the answer not in the manual?

Questions and answers

Related Manuals for SENTRON SI400 7400-0

Summary of Contents for SENTRON SI400 7400-0

  • Page 1 SI line pH METER MANUAL For products: SI400 7400-0xx SI600 7600-0xx...
  • Page 2 Manual SI line pH meter Ref. number E7500330.02 In the event your Sentron pH meter has this symbol on its label, you are requested to return this meter to Sentron after use. Sentron will ensure the meter is disposed of in...

  • Page 3: Table Of Contents

    Contents General ............................4 Declaration of compliance ....................4 Guarantee ...........................4 Specifications ........................5 Installation ..........................6 Batteries ..........................6 Connection of probe to meter .....................7 SD memory card ........................8 Operation............................8 Keypad ..........................8 Home screen ........................9 Configuration ..........................12 Power save ........................12 Time ..........................14 Button sound ........................

  • Page 4: General

    Sentron holds the right, at wholly its own discretion, to refuse guarantee claims in the event it suspects the meter has been used incorrectly. In cases of incorrect use Sentron may, but is not obliged to, offer to repair the meter at regular repair fees.

  • Page 5: Specifications

    1.3 Specifications...

  • Page 6: Installation

    2 Installation To start using your Sentron SI pH meter for the first time you will need to connect a probe to the meter and remove the battery isolator. In the sections below you will find instructions on how to do this. In the Batteries section you will also find instructions for charging and replacing batteries.

  • Page 7: Connection Of Probe To Meter

    2.2 Connection of probe to meter The probe is designed to work in combination with a Sentron SI line pH meter. Push the probe’s connector into the socket on the upper side of the meter. The (white) notch on the probe connector needs to be aligned with the meter, having the notch facing towards the front side of the meter.

  • Page 8: Sd Memory Card

    2.3 SD memory card The battery compartment contains a SD card slot holder with a pre-installed SD card. This SD card is required for the meter’s operation and should not be removed unless instructed by a Sentron service engineer. 3 Operation Operation of the SI meter is done via the 6 keys below the screen.

  • Page 9: Home Screen

    3.2 Home screen The home screen displays all the key information required when making pH measurements. It contains five sections:  Date, time and battery status  Measurement values  Notifications  Status bar  Main menu  The SI meter’s home screen ...
  • Page 10 3.2.4 Notifications Only when the main screen is displayed, some additional notifications regarding certain settings are can being displayed on top of the status bar. Alarm (SI600 only): An alarm can be set when pH and / or temperature values go beyond user definable upper and lower limits.

  • Page 11: Status Bar

    3.2.5 Status bar The status bar displays additional information about the meter status. What is displayed depends on whether the meter is on the home screen, in a sub menu or a function is being selected. On the home screen, the status bar will display information regarding the probe, e.g. Probe disconnected or Calibration OK.

  • Page 12: Configuration

    Options menu (Page 27). 4.1 Power save The Sentron SI meter has two options to save power and extend battery operation time: Display-off and Meter-off. Set either one, or both, of the options to maximize use of the battery capacity: Display-off: switch off the display after a user definable inactive time.
  • Page 13 To set or change the Meter-off setting: Go to the Config menu, and choose Power save. Now select Meter-off. Toggle the on/off button and select the display-off time between 1 and 60 minutes. Confirm and apply with the Set button, or exit with the Back button to discard any changes.

  • Page 14: Time

    4.2 Time The Sentron SI meter is equipped with a highly accurate internal clock. The date and time are factory set to Central European Time (CET), which is 1 hour ahead of Coordinated Universal Time (UTC +01:00). The meter’s time setting can be adjusted to the local time and either 12 or 24 hour display can be selected.

  • Page 15: Temperature

    Back key to discard any changes. 4.5 Language The language in which the Sentron SI meter displays menus and options can be changed into one of the five pre-installed languages; Dutch, English, French, German, and Spanish. To change the language:...

  • Page 16: Calibration

    In practice this means calibration should be performed at least daily. The calibration process consists of placing a probe attached to the Sentron pH meter in one, or a series of, buffer solutions with a predetermined pH. The type of calibration, and the number of calibration points depend on several factors.

  • Page 17: Determining The Calibration Type

    5.1 Determining the calibration type When starting a new pH measurement, the first step is to determine what calibration process is most appropriate for this application. Choosing the wrong calibration process may result in inaccurate measurements and possibly require the measurements to be repeated. Calibrations can be either single or multiple point.

  • Page 18: Before Calibration

    (see chapter 5.5)  Make use of Sentron twin-neck calibration fluid bottles as they minimize contamination of the buffer and allow convenient storage and calibration using a single bottle. When a new probe is attached to a meter, or when a probe has not been used for a while, the probe may react slow or has low slope readings after calibration.

  • Page 19: Performing A Calibration

    5.3 Performing a calibration The calibration sequence is set up in such a way that it is easy to perform and minimal input is required. To rule out erroneous multi-point calibrations, the calibration can only take place for an increasing or decreasing pH sequence.

  • Page 20: Calibration Reports

    5.4 Calibration reports After each calibration a report is generated and stored in the meter’s memory. The date of calibration, the buffers used, measured temperature and, in the case of a multi-point calibration, the calculated slopes are summarized in this report. Calibration reports are shown after each calibration and are stored by the meter.
  • Page 21 5.4.3 Send reports (SI600 only) The calibration reports in the meter’s memory can be send to a PC via the USB port. All available reports will be sent sequentially. It is not possible to send individual reports. To send the calibration reports via the USB port: Go to the Calibrate menu, and choose Calibration reports.
  • Page 22 The SI600 can hold up to ten calibration reports, these can be deleted individually as well as together at once. Deleting a report will only delete the overview, not the actual calibration values. To delete an individual calibration report (SI600): Go to the Calibrate menu, and choose Calibration reports.

  • Page 23: Calibration Reminder

    5.5 Calibration reminder In order to perform accurate measurements, it is necessary to periodically repeat the calibration process. How often this is necessary will depend on the application and the chemical composition of the samples measured. To ensure that periodic calibrations take place on time for any specific application, it is possible to set a user defined calibration reminder time after which a notification is displayed on the main screen.

  • Page 24: Buffer Selection (Si600 Only)

    The buffer sets consist of a range of predefined pH values for which buffers are prepared in a standard and reproducible way. All Sentron SI line meters are compatible with the Sentron buffer set. Selected meters, such as the SI600, have the option of changing the buffer set. The SI600 supports, besides the standard Sentron buffer set, also DIN, NIST and JIS buffer sets.
  • Page 25 The default buffer set for which the meter is configured is the SENTRON buffer set. The Sentron buffer set consists of a set of five NIST-traceable buffers with a pH of 2.00, 4.00, 7.00, 10.00 and 12.00 at 25°C. The table containing the temperature dependence of the buffer set is presented in Table 1 below.
  • Page 26 5.6.3 NIST buffer set The table containing the temperature dependence of the NIST buffer set as it is used in the SI meter is presented in Table 3 below. °C °F 1.67 4.00 6.95 9.40 13.21 1.67 4.00 6.90 9.28 12.81 1.68 4.01...

  • Page 27: Options

    The options menu contains various features such as alarms and data acquisition options (note that options may only be available in Sentron’s advanced meters such as the SI600). All features in this menu relate to the actual measurement and/or measurement values. Operation and settings regarding the meter itself, like energy, time and display features are placed in the Config menu (Page 12).
  • Page 28 6.1.2 Temperature alarm The temperature alarm can be set for a minimum and maximum value. When the temperature exceeds the maximum value or falls below the minimum value of the set limits, the alarm is triggered and the meter will start beeping and the alarm notification is displayed on the main screen. The temperature alarm can be set between minimum 0.0 and maximum 80.0 degrees Celsius (32.0 and 176.0 degrees Fahrenheit).
  • Page 29 To set or change the stability check: Go to the Options menu, and choose Alarms. Now select Stability check. Toggle the on/off button and select the desired minimum stability value. Confirm and apply with the Set button, or exit with the Back button to discard any changes. 6.1.4 Disable all alarms When multiple alarms have been set and are no longer required, they can be deactivated by a single Disable all alarms action.

  • Page 30: Storing Measurements

    6.2 Storing measurements Sentron SI series meters have several options, depending on the model, for storing measurement data. These options, and how data can be transferred to a PC are described below. The meter distinguishes between manual recording of an individual measurement value and automated recording of a series of measurements.
  • Page 31 6.2.2 Changing the sample name prefix Samples are given a default four character prefix “SAMP” follow by an automated sequential numbering of three digits starting with 000. Hence, the first samples taken with this prefix have names SAMP000, SAMP001, SAMP002 etc. In order to better identify samples that have been taken it is possible to adjust the standard prefix into a custom one.
  • Page 32 6.2.3 Review/delete a single sample Stored and saved samples can be looked up and viewed individually on the meter. All stored samples can be viewed using the Browse sample menu. When a sample is viewed it can either be closed to be viewed again at a later time or deleted.
  • Page 33 6.2.4 Logging (SI600 only) Sentron’s SI 600 pH meters are capable of logging data automatically at a predetermined time interval to the internal memory. This option can be used to analyze or monitor pH over a time period without having to be present at the meter to record the data.
  • Page 34 6.2.5 Changing the log name prefix Log files are given a default four character prefix “LOG_” follow by an automated sequential numbering of three digits starting with 000. Hence, the first log files taken with this prefix have names LOG_000, LOG_001, LOG_002 etc.
  • Page 35 6.2.6 Review/delete a log file It is possible to review information on the log file such as start date / time, end date / time and the number of recorded data points on the meter. The actual measurement values within log files cannot be viewed on the meter as the number of recorded data points is usually large and not very meaningful in tabular form on a small screen.
  • Page 36 6.2.7 Send data to a PC (SI 600 only) To move a stored data point or data log to a PC, first connect the meter to the PC using the USB cable supplied with the meter. Second, open a “listening” program (like e.g. HyperTerminal or Putty) and set baud rate to 9600 8 N 1 for receiving the data from the USB port.
  • Page 37 6.2.9 Erasing data / emptying the SD-card The Sentron meter will not overwrite stored samples and logs. To free up memory, it may be necessary to erase samples and/or logs. All data can be deleted at once, or all samples and/or all logs can be deleted at once.

  • Page 38: Bias Setting

    6.3 Bias setting In certain exceptional cases it may happen that the pH measured by the Sentron ISFET pH sensor differs from a glass pH electrode by a constant pH value. This difference occurs under certain circumstances and is an inherent physical property of the two different ways pH is measured by a glass or solid state electrode.

  • Page 39: Maintenance

    7 Maintenance A Sentron SI series meter requires very little maintenance. In the event the meter becomes dirty, it can be cleaned using a damp cloth. To avoid having the USB connector become clogged by dirt, keep the dust cover closed except when...

  • Page 40: Troubleshooting Guide

    Slope to high/low Calibration flaw. Recalibrate, make sure to always use fresh pH buffers and buffers of the correct (selected) types: SENTRON/DIN/NIST/JIS. Contaminated ISFET and/or Soak/clean the probe. See chapter 3 of reference. probe manual. Brush the ISFET gently. Short working time of Meter is not charged properly.
  • Page 41 USB data connection USB cable connection fail Re-connect the USB cable to meter issue and master (computer i.e.). Baud rate mismatch Set master to right baud rate 9600 8 N 1...

  • Page 42: Contact Information

    9 Contact information SENTRON Europe B.V. Kamerling-Onnesstraat 5 9351 VD Leek The Netherlands Tel: 050 501 38 00 E-mail: info@sentron.nl Visit Sentron.nl for more information and documentation.

This manual is also suitable for:

Si600 7600-0

Table of Contents