GREISINGER GMH 3251 Operating Manual
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GREISINGER GMH 3251 Operating Manual

Quick-response double / difference thermometer
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H76.0.02.6C-04
as of version 4.0
Please carefully read these instructions
before use!
Please consider the safety instructions!
Please keep for future reference!
GHM GROUP - Greisinger
GHM Messtechnik GmbH | Hans-Sachs-Str. 26 | 93128 Regenstauf | GERMANY
Tel.: +49 9402 9383-0 |
Double / Difference Thermometer
info@greisinger.de
| www.greisinger.de
Operating manual
Quick-Response
GMH 3251
WEEE-Reg.-Nr. DE 93889386

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Summary of Contents for GREISINGER GMH 3251

  • Page 1  Please consider the safety instructions!  WEEE-Reg.-Nr. DE 93889386 Please keep for future reference! GHM GROUP - Greisinger GHM Messtechnik GmbH | Hans-Sachs-Str. 26 | 93128 Regenstauf | GERMANY Tel.: +49 9402 9383-0 | info@greisinger.de | www.greisinger.de...

  • Page 2: Table Of Contents

    H76.0.02.6C-04 Operating Manual GMH 3251 page 2 of 18 _____________________________________________________ _____________________________________________________________________________ Index 1 GENERAL NOTE ....................... 3 2 SAFETY ..........................3 2.1 I ........................3 NTENDED 2.2 S .................... 3 AFETY SIGNS AND SYMBOLS 2.3 S ......................4 AFETY GUIDELINES 3 PRODUCT SPECIFICATION ...................

  • Page 3: General Note

    H76.0.02.6C-04 Operating Manual GMH 3251 page 3 of 18 _____________________________________________________ _____________________________________________________________________________ 1 General Note Read this document carefully and get used to the operation of the device before you use it. Keep this document within easy reach near the device for consulting in case of doubt.

  • Page 4: Safety Guidelines

    H76.0.02.6C-04 Operating Manual GMH 3251 page 4 of 18 _____________________________________________________ _____________________________________________________________________________ 2.3 Safety guidelines This device has been designed and tested in accordance with the safety regulations for electronic devices. However, its trouble-free operation and reliability cannot be guaranteed unless the standard safety measures and special safety advises given in this manual will be adhered to when using the device.

  • Page 5: Product Specification

    H76.0.02.6C-04 Operating Manual GMH 3251 page 5 of 18 _____________________________________________________ _____________________________________________________________________________ Product Specification 3.1 Scope of delivery The scope of supply includes:  Device with battery  Operating manual 3.2 Operation and maintenance advice  Battery operation: If ‘bAt’ is shown in the lower display the battery has been used up and needs to be replaced.

  • Page 6: Handling

    H76.0.02.6C-04 Operating Manual GMH 3251 page 6 of 18 _____________________________________________________ _____________________________________________________________________________ 4 Handling 4.1 Display Main display: measuring value of sensor 1 Arrows show display options. Secondary display: measuring value of sensor 2 or difference sensor 1 – sensor 2 Corr: appears if offset- , scale correction or correction for surface measurement is <>...

  • Page 7: Connections

    H76.0.02.6C-04 Operating Manual GMH 3251 page 7 of 18 _____________________________________________________ _____________________________________________________________________________ 4.3 Connections Output: Connection for optically isolated interface adapter or for analog output (please refer to chapter 9.2) Sensor Connection CH1: channel 1 Sensor Connection CH2: channel 2 Power supply: the mains adapter socket is located at the left side of the device.

  • Page 8: Start Operation

    H76.0.02.6C-04 Operating Manual GMH 3251 page 8 of 18 _____________________________________________________ _____________________________________________________________________________ 5 Start Operation Connect sensor and turn on device via key. After segment test the device displays some configuration: • If the surface correction factor is adjusted, the display will show „SCF.x“...
  • Page 9 H76.0.02.6C-04 Operating Manual GMH 3251 page 9 of 18 _____________________________________________________ _____________________________________________________________________________ Set Calibration: Adjustment of Sensors Corr OFS.1 -10.0°C..10.0°C or The offset of sensor 1 will be displaced by this value to -18.0°F..10.0°F compensate for deviations in the Sensor or in the measuring device.

  • Page 10: Remarks To Special Features

    H76.0.02.6C-04 Operating Manual GMH 3251 page 10 of 18 _____________________________________________________ _____________________________________________________________________________ 7 Remarks To Special Features 7.1 Tare Function The tare function is used to set the DIF-display to zero, which is especially important when monitoring temperature differences. If the tare key is pressed for more than 2 seconds DIF = CH1-CH2 will be restored.

  • Page 11: Operation Of Logger

    H76.0.02.6C-04 Operating Manual GMH 3251 page 11 of 18 _____________________________________________________ _____________________________________________________________________________ 8 Operation Of Logger The device supports two different logger functions: „Func-Stor“: each time when „store“ (key 6) is pressed a measurement will be recorded. „Func-CYCL“: measurements will automatically be recorded each interval, which was set in the logger menu ‚CYCL‘...

  • Page 12: Func-Cycl": Automatic Recording With Selectable Logger-Cycle-Time

    H76.0.02.6C-04 Operating Manual GMH 3251 page 12 of 18 _____________________________________________________ _____________________________________________________________________________ (key 3) the measurement recorded last will be displayed, changing between the different values referring to the measurement also is done by pressing . Changing the measurement is done by pressing the keys  or .

  • Page 13: Output

    H76.0.02.6C-04 Operating Manual GMH 3251 page 13 of 18 _____________________________________________________ _____________________________________________________________________________ Clear Recordings: By pressing "Store" (key 6) for 2 seconds the logger operation will be called. By pressing the keys  (key 2) or  (key 5) the display...
  • Page 14 H76.0.02.6C-04 Operating Manual GMH 3251 page 14 of 18 _____________________________________________________ _____________________________________________________________________________ The device has 3 channels: - Channel 1: sensor 1 current measuring value (base address) - Channel 2: sensor 2 current measuring value - Channel 3: difference sensor 1 - sensor 2 current measuring value...

  • Page 15: Analogue Output - Scaling With Dac.0 And Dac.1

    H76.0.02.6C-04 Operating Manual GMH 3251 page 15 of 18 _____________________________________________________ _____________________________________________________________________________ 9.2 Analogue Output – Scaling with DAC.0 and DAC.1 Note: Analogue output can not be used during logger recordings With the DAC.0 and DAC.1 values the output can be rapidly scaled to your efforts.

  • Page 16: Calibration Services

    H76.0.02.6C-04 Operating Manual GMH 3251 page 16 of 18 _____________________________________________________ _____________________________________________________________________________ switched on; during operation it will be identified by means of the Corr-arrow in the display 10.4 Calibration Services Calibration certificates – DKD-certificates – other certificates: If device should be certificated for its accuracy, it is the best solution to return it to the manufacturer.

  • Page 17: Disposal

    H76.0.02.6C-04 Operating Manual GMH 3251 page 17 of 18 _____________________________________________________ _____________________________________________________________________________ Use an adequate transport package for reshipment, especially for fully functional devices. Please make sure that the device is protected in the package by enough packing materials. Add the completed reshipment form of the GHM website http://www.ghm-messtechnik.de/downloads/ghm-formulare.html.
  • Page 18 H76.0.02.6C-04 Operating Manual GMH 3251 page 18 of 18 _____________________________________________________ _____________________________________________________________________________ Display: Two 4½ digit LCDs (12.4 mm high and 7 mm high) for measuring values, and for min/ max memories, hold function, etc. as well as additional functional arrows.

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