Eltek Squirrel 1000 Series Manual
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Eltek Squirrel 1000 Series Manual

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1.
Introduction ............................................................................. 4
2.
The functions of the datalogger ............................................. 5
2.1
LOG ................................................................................ 5
2.2
METER ........................................................................... 5
2.3
REVIEW ......................................................................... 5
2.4
TIME / date ..................................................................... 5
2.5
START time / date........................................................... 5
2.6
2.7
OUTPUT ......................................................................... 5
2.8
MODE ............................................................................. 6
2.9
CHANNEL SETUP .......................................................... 6
2.10
STAT (status)................................................................. 6
3.
3.1
Set time/date ................................................................... 7
3.2
Select logging interval ..................................................... 8
3.3
Set the type of logging required ....................................... 8
3.4
Set the number and types of channels ............................. 9
3.5
Start logging .................................................................. 11
3.6
Stop logging .................................................................. 12
4.
More about the functions of the datalogger ........................ 13
4.1
The LOG function .......................................................... 13
4.2
The METER function ..................................................... 15
4.3
The REVIEW function ................................................... 16
4.4
The TIME and date function .......................................... 17
4.5
The delayed START function......................................... 17
4.6
4.7
The OUTPUT function ................................................... 20
4.8
The MODE function ....................................................... 21
4.9
The CHANNEL SETUP function .................................... 27
4.10
The STAT function ....................................................... 30
5.
5.1
Wiring up thermistor sensors ......................................... 35
5.2
Wiring up platinum resistance sensors .......................... 35
5.3
Wiring up sensors to voltage channels .......................... 36
5.4
Wiring up sensors to current channels ........................... 36
5.5
5.6

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  • Page 1: Table Of Contents

    Table Of Contents Introduction ................4 The functions of the datalogger ..........5 LOG ................5 METER ................5 REVIEW ................. 5 TIME / date ..............5 START time / date............5 INT log / sample (logging/sampling interval) ....5 OUTPUT .................
  • Page 2 Wiring up an AC voltage input ........38 Wiring up a pulse count channel ........39 Wiring up event channels ..........40 5.10 Wiring up for external triggers ........41 Troubleshooting guide ............42 “Why won’t it do that?” ........... 42 Memory Card Squirrels (1000 series only) ......
  • Page 3 12.8 Changing fuses ............61 12.9 Changing memory ............61 12.10 Sensor supply voltage ..........62 Technical data ............... 63 13.1 Inputs, ranges and resolutions ........63 13.2 Specification ..............64 Connectivity ................65 14.1 Signal connector ............65 14.2 Output connector (for connection to a PC) ....

  • Page 4: Introduction

    This user manual covers the operation and configuration of the Squirrel datalogger via the three operating buttons on its front panel. The Squirrel can also be configured and operated from a connected PC running Eltek’s Darca software. The operating buttons on the front of the logger allow the setup of nearly all of the major functions of the logger, but some functions can only be accessed through Darca.

  • Page 5: The Functions Of The Datalogger

    2. The functions of the datalogger Listed in the order they appear when scrolling with the function button. 2.1 LOG Used to start and stop logging. In addition, this function displays the number of readings already stored in the memory (used), and the number of readings that may be stored in the remaining memory (free).

  • Page 6: Mode

    setting is required as it is automatically selected. 2.8 MODE Used to select the type of logging required, namely Interval, Average, Event, Event+Interval, Event+Average. This function allows you to select how logging may be started and stopped via an external trigger, if required.

  • Page 7: How To Start Logging From The Default Settings

    3. How to start logging from the default settings 3.1 Set time/date The real time and date are displayed on two lines. The time is set in the format HH:MM:SS. and the date default format is DD/MM/YY. Press function until the display shows: - T I M E 1 0 : 4 2 : 5 9 d a t e...

  • Page 8: Select Logging Interval

    3.2 Select logging interval The logging interval can be set between 1 second and 24 hours in 1- second increments. Recordings are stored at this interval. Press function until display shows: - I N T l o g 0 0 : 0 0 : 3 0 s a m p l e 0 0 : 0 0 : 0 0 Press set to display: -...

  • Page 9: Set The Number And Types Of Channels

    need to record data at the logging intervals set in section 3.2. 3.4 Set the number and types of channels Each model has a specified combination of channels, please consult the data sheet in Section 13 for details of your particular model. This section will guide you to set up a temperature and voltage/current channel.
  • Page 10 The temperature range then increments to the next available range with every press of the set button: - ° F - 2 2 . 0 1 5 8 . 0 Leave the display showing your chosen range and press select to set up another channel.

  • Page 11: Start Logging

    n o t u s e d Press set and hold for 3 seconds: - H O L D C H A N G E Now press set to scroll through the voltage/current ranges. Leave the display showing your chosen range and press select to set up another channel or press function to continue with logger setup.

  • Page 12: Stop Logging

    3.6 Stop logging Press function to wake up the logger: - L O G u s e d 1 2 3 Hold set to stop logging: - L O G H O L D S T O P L O G o f f u s e d 1 2 3...

  • Page 13: More About The Functions Of The Datalogger

    4. More about the functions of the datalogger 4.1 The LOG function 4.1.1 Logging status displays Whenever function is pressed while the logger display is blank, the display will indicate the logging state. This indicates that logging is in progress and that 123 memory slots have been used so far: - L O G u s e d...
  • Page 14 The number of separate runs already recorded (out of a maximum of 99) is displayed in the last screen. If the logger is logging, then the current run number is displayed: L O G o f f r u n 4.1.3 Start/stop logging If you have just unpacked your datalogger and have not previously used this model then please go to section 3.

  • Page 15: The Meter Function

    4.2 The METER function This displays the value of the selected channel using the currently selected range for that channel. As soon as you enter the METER function, the display will show the value of the first channel selected and these values will be updated every second.

  • Page 16: The Review Function

    M O D E l o g e v e n t M O D E l o g e v e n t + i n t e r v a l M O D E l o g e v e n t + a v e r a g e M O D E e x t e r n a l...

  • Page 17: The Time And Date Function

    displayed: - R E V I E W m o r e At any time you may skip to another channel and restart the review by pressing select. 4.4 The TIME and date function This displays the real time and date on two lines. The time clock is in a 24 hour format (HH:MM:SS).
  • Page 18 Now press select to place the cursor under the entries that you need to change: - S T A R T 0 0 : 0 1 : 0 0 0 1 / 0 1 / 9 4 This entry may now be changed by pressing set until the desired value is achieved: - S T A R T 0 0 : 0 5 : 0 0...

  • Page 19: The Int Function (Logging/Sampling Interval)

    Please note that invalid settings are treated as for time and date. 4.6 The INT function (logging/sampling interval) Depending upon the logging mode selected (see 4.8), readings may be stored in memory at fixed intervals or when certain events occur or a combination of both of these.

  • Page 20: The Output Function

    Once you enter OUTPUT the display will clear and the datalogger will quickly enter sleep mode, which is required prior to active communication. The baud rate is automatically selected by the program that is used. Eltek Squirrels with serial numbers 6000 and above will work at up to 38400 baud.

  • Page 21: The Mode Function

    Baud rate Minimum logging interval 10 seconds 1200 3 seconds 2400 2 seconds 4800 - 38400 1 second 4.8 The MODE function Once you have entered this function using the function button, press select to select from the following sub-functions. (Please note that you cannot change any entries in the MODE function while logging is in progress or while readings are still stored in the memory).
  • Page 22 M O D E l o g C H E C K I N T E R V A L S 4.8.4 Logging events only M O D E l o g e v e n t The event inputs are monitored every second irrespective of log and sample intervals selected.
  • Page 23 voltage high contacts open contacts closed high contacts open contacts closed time...
  • Page 24 4.8.5 Interval logging with events M O D E l o g e v e n t + i n t e r v a l This is a combination of event and interval recordings and therefore readings are taken at the end of each recording interval and each time any event input changes state.
  • Page 25 voltage high contacts open contacts closed time run 1 run 2 4.8.9 External triggering in a single run M O D E e x t e r n a l t r i g g e r r e c o r d S Logging is started in the usual way by pressing set in the LOG function (see 3.5.).
  • Page 26 voltage high contacts open contacts closed time recording: enabled disabled enabled disabled 4.8.11 Types of signals which will trigger the logger If external contacts are used, logging will start when they close (connecting pin 13 to pin 14), and stop when they open. Alternatively, voltage levels can be used instead of contacts.

  • Page 27: The Channel Setup Function

    L O G o f f M O R E R U N S Data can be downloaded at any time (even during logging) without loss of recordings. 4.9 The CHANNEL SETUP function This is used to select the channels and set the range for each channel. Each model has a specified combination of channels, please consult the data sheet in Section 13 for details of your particular model.
  • Page 28 m / s C A N N O T C H A N G E In the instance that all channels have been de-selected, the logger will challenge any attempt to leave the function until at least one channel has been selected: - C H A N N E L S E T U P...
  • Page 29 L u x 0 . 0 5 0 0 . 0 0 . 0 0 0 5 . 0 0 0 The EU range can only be set up using then Darca software application. Whenever a voltage/current channel has not been set up, the initial range is always the default EU range and is displayed as follows: - 0 .

  • Page 30: The Stat Function

    An additional range, called the EU (Engineering Unit) range, can be set up using the Darca software application. This allows the user to specify engineering units and a max/min scale (e.g. 0/1300 mm rain) corresponding to either of the pulse ranges. All data in this channel will, in this example, be stored and downloaded using mm rain as the unit;...
  • Page 31 8 . 9 The logger can be used with an Eltek external DC power supply type MP12U (if GSM modem use anticipated) or MP12U5W (in all other situations). These are ultra-low leakage and wired correctly with a 2.1mm power jack.
  • Page 32 Subsequently pressing set will scroll through the available memory sizes from 1K to 30K in 1K increments and thereafter in 20K increments. Holding down set will allow you to scroll through the memory sizes faster. 4.10.4 Sensor power on facility S T A T s e n s o r s e c o n d s...
  • Page 33 4.10.5 Date format selection S T A T d a t e f o r m a t D D / M M / Y Y The date format is shown in the UK default format; the following formats are also available and may be changed by pressing and holding set: S T A T d a t e f o r m a t...
  • Page 34 4.10.7 Mains filter frequency S T A T f i l t e r The mains filter frequency is displayed. This must be set to the local mains electricity supply frequency to produce the most accurate readings. The frequency is changed using the set button; press and hold to change the filter frequency to 60 Hz.

  • Page 35: Connecting Sensors/Signals To The Datalogger

    5. Connecting sensors/signals to the datalogger 5.1 Wiring up thermistor sensors Individual plug-in terminal blocks with cable restraints are provided to make the connections to the inputs on the datalogger. Thermistors often have no designating letters, since they have no polarity. thermistor thermistor thermistor...

  • Page 36: Wiring Up Sensors To Voltage Channels

    5.3 Wiring up sensors to voltage channels Individual plug-in terminal blocks with cable restraints are provided to make the connections to the inputs on the datalogger. The positive output from the sensor should be connected to the ‘v’ input and the negative to the ‘-’...

  • Page 37: How To Provide A Power Supply To The Sensors

    sensor output sensor output c v o 5.5 How to provide a power supply to the sensors Each voltage/current channel has its own connections to allow sensors to be supplied with power at 5V DC or 9V DC. By default, the voltage will be at approximately 9V DC.

  • Page 38: Wiring Up Current Loop Sensors Driven By The Squirrel

    5.6 Wiring up Current Loop Sensors driven by the Squirrel sensor output 5.7 Wiring up an AC voltage input AC inputs have 3 pin DIN sockets for connecting a range of different sensors. Rogowski coils, Voltage Transducers and Current Transducers can be connected to any of the AC voltage inputs.

  • Page 39: Wiring Up A Pulse Count Channel

    5.8 Wiring up a pulse count channel Pulse count channels may be wired for a voltage input or a voltage-free contact (see section 4.9.3 for details of voltages and mechanical contact conditions). The positive connection should be made to the ‘+’ input and the negative to the ‘-’...

  • Page 40: Wiring Up Event Channels

    5.9 Wiring up event channels Any or all of the eight event inputs on the ‘signal’ connector (15-way male D) may be connected (via a contact or signal source) to one of the common ground pins, as indicated in the following diagram: - common ground 8 7 6 5 3 2 1...

  • Page 41: Wiring Up For External Triggers

    5.10 Wiring up for external triggers Logging can be started or stopped by an external signal. This external signal can be in the form of a voltage or a contact and should be connected between pin 14 and common ground. See 4.8.11 for further information.

  • Page 42: Troubleshooting Guide

    6. Troubleshooting guide 6.1 “Why won’t it do that?” Having described the many things you can do with a 1000 Series Squirrel, here are just a few operations that are not possible: - · clear the memory while logging is in progress ·...

  • Page 43: Memory Card Squirrels (1000 Series Only)

    7.1 Types Of Card Not all types of SRAM card are compatible with the Squirrel. Cards made by Panasonic are the only cards that have been tested by Eltek and are recommended for use with Squirrels. Other cards may be compatible but could result in excessive current consumption.
  • Page 44 C A R D a b s e n t i n s e r t c a r d h e r e This tells you that this is the point where a card may be inserted. Until this is done, pressing the select button will not display the next page of the function.
  • Page 45 C A R D u s e s i z e 1 0 4 0 K This tells you of the status of the card, and reminds you not to remove the card. 7.3.2 Choose memory Pressing the select button again will display the memory selection page. This is where you can choose whether the internal memory or the memory card should be used when logging.

  • Page 46: Extracting The Data

    C A R D c h o o s e m e m O V E R W R I T E C A R D ? N.B. Neither this function nor the next can be accessed while the Squirrel is logging to the card.
  • Page 47 to be stored in with the second ‘Browse’ button. · Click the ‘Convert’ button to copy the data from the SRAM card and store it on your PC as the chosen DAT file.

  • Page 48: Electricity Squirrels (1010, 1020)

    8. Electricity Squirrels (1010, 1020) Electricity Squirrels have inputs for AC transducers, like Rogowski coils, current and voltage transducers. An extra function in the Squirrel allows easy reviewing of the maximum logged values stored on each channel. Additionally, the last two channels out of every eight can be used for temperature probes.

  • Page 49: Making Connections To The Datalogger

    8.2.1 Ranges A completely new set of analogue ranges is implemented on the 1010: - 1010 1020 Input type Available ranges Resolution 1-16 AC Transducer 0 to 200A coil 0.2A 0 to 500A coil 0.5A 0 to 1000A coil 0 to 2000A coil 0 to 1000A CT 0.3V 0 to 300V...

  • Page 50: Squirrels With Ph Channels

    9. Squirrels with pH channels Some Squirrels have pH inputs. Such inputs require individual two-point calibration, and temperature compensation. The Squirrel supports two types of temperature compensation - measured and pre-set. 9.1 Channel Selection The pH channels have two ranges available. These are actually both the same range;...

  • Page 51: Choosing The Calibration Point

    9.3 Choosing the Calibration Point Calibration of the pH probes requires two buffer solutions. One must be pH 7.0; the other may be pH 4.0, 9.0 or 10.0. The other extra STAT function is for setting the pH of this second buffer solution. S T A T s l o p e 4 .

  • Page 52: Calibrating The Slope

    If the display is showing ‘O/RANGE’ when the set button is pressed, the display will show ‘CANNOT SET’ to indicate that the probe cannot be calibrated. The Squirrel retains its previous calibration setting. Select the next pH channel with the select button, and calibrate it in the same way. This must be done for all the channels that are required.

  • Page 53: Care And Use Of Ph Probes

    are selected for metering or recording. If the logger is not recording or waiting for a delayed start, the power supply is switched off at midnight. This power supply is the reason for the decreased battery life. This is reflected in the displayed battery life in the STAT function. 9.7 Care and Use of pH Probes pH probes are very sensitive.

  • Page 54: Special Instructions

    10. Special Instructions This section contains instructions for special 1000 Series Loggers, so do not necessarily apply to your Squirrel(s). 10.1 Alarms · High and low alarms individually configurable on each channel. · The alarm output is asserted, and the relay contact is closed, whenever any channel is in an alarm state while logging.

  • Page 55: Wind Speed & Direction

    High Alarm Operation of this function is identical to the Low Alarm function described above. Eltek Timed This type of alarm includes high and low start values along with a delay which can be enabled. The delay is common to both the high and low level and must be a multiple of the sample interval.
  • Page 56 average - it is not averaged as 0-5V dc as this would cause an erroneous readings under certain conditions (e.g. When the direction varied around North - say 375° to 5° - the mathematical average would be 180° which is South!).

  • Page 57: Fast Logging (1000 Series Only)

    11. Fast Logging (1000 series only) Some loggers are provided with the capability to records at faster than one second intervals. The following sections refer to these loggers only. 11.1 Logging Interval In order for the Squirrel to operate in fast logging mode, only analogue channels must be selected.

  • Page 58: Darca Contact

    elapsed time column. To switch it on, select Preferences then Export and choose Generate Elapsed Time Column. 11.3 Darca Contact It is not possible to contact the Squirrel (for either controlling or downloading) while it is logging in ‘fast logging mode’. Logging must first be stopped using the button on the front of the Squirrel.

  • Page 59: Safety And Operating Conditions

    12. Safety and operating conditions 12.1 Operator safety TO PROTECT AGAINST SHOCK HAZARDS TO OPERATORS, datalogger inputs and outputs should not be connected to voltages of more than 25V DC or RMS AC with respect to earth (ground) unless the datalogger is inside a protected enclosure.

  • Page 60: Protection Against Memory Loss

    condensation can occur if it is brought into a warmer environment. The datalogger should be placed in a sealed container (a plastic bag provides a cost-effective solution). The container should remain sealed until the datalogger has warmed up to room temperature. 12.5 Protection against memory loss The memory, which stores the data and datalogger settings, is protected by a Lithium coin cell (3V Panasonic BR2032).

  • Page 61: Changing Fuses

    button. 12.8 Changing fuses There are three places where fuses are used to protect the circuits of the datalogger. These are the external power supply input, the sensor supply outputs and each current channel input. If an external supply is connected and cannot be measured as described in section 4.10.2 then the logger power supply fuse may be faulty.

  • Page 62: Sensor Supply Voltage

    round. The notch on the chip is to the left, next to the display. Modules have the notch indicated in a white rectangle. The notch is next to the capacitor marked C1. · Check the position of the two jumpers to the left of the chip, just above the larger chip.

  • Page 63: Technical Data

    13. Technical data 13.1 Inputs, ranges and resolutions Input type Available ranges Resolution Thermistor temperature (U) -50 to 150°C -58 to 302°F See below Best resolution -5 to 75°C 0.05°C -25 to 5°C & 75 to 100°C 0.1°C -40 to -25°C & 100 to 125°C 0.2°C Worse resolution -50 to -40°C &...

  • Page 64: Specification

    13.2 Specification Accuracy Voltage ±0.1% of reading ±0.1% of span (at 20°C) Temperature ±0.2% of reading ±0.1% of span Environment Ambient temperature -30 to 65°C. Humidity up to 95% (non- condensing). Power supplies Internal: six size AA manganese-alkaline batteries (such as Duracell MN1500).

  • Page 65: Connectivity

    14. Connectivity 14.1 Signal connector The connector marked ‘signal’ is a 15 way male D connector. It is both a digital/event input, and the external trigger input. The connections are as follows: 15 way male D Description Event bit 8 (MSB) Event bit 7 Event bit 6 12 11...
  • Page 66 RS232/USB adapter can be used in conjunction with the LC68. The preferred adaptor is the NewLink USB Serial Convertor (type NLUSB0039) which is available from Eltek. Note: Not all USB adaptors are compatible! Ensure the device is installed correctly and make a note of the COM port number for each USB slot on the computer as it will be required by the Darca software.

  • Page 67: Declaration Of Conformity

    Declaration of Conformity Manufacturer Eltek Ltd Haslingfield Cambridge CB23 1LL Description of Equipment 1000 Series Squirrel Meter/Logger I confirm that this instrument conforms to the requirements of the EMC Directive 89/336/EEC (amended 92/31/EEC) and carries a CE mark indicating conformity.

This manual is also suitable for:

Squirrel 1010Squirrel 1020

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