GREISINGER GMH 3451 Operating Manual Download Page 18

H72.0.11.6C-04 

 Operating Manual GMH 3451 

page 18 of 18 

 

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18 Specification 

 
 

 

Measuring 
ranges 

Anzahl  

Conductivity 1 *)  0,0 ... 200,0 µS/cm  
          ”         2 *)  0 ... 2000 µS/cm      
          ”         3 *)  0,00 ... 20,00 mS/cm  
          ”         4 *)  0,0 ... 200,0 mS/cm  
          ”         5 *)  0 ... 400 mS/cm  
Resistivity 

0,005 ... 100,0 kOhm*cm  

TDS 

0,0 ... 1999 mg/l   

Salinity 

0,0 ... 70,0 g/kg (PSU) 

Temperature 

-5,0 ... +100,0 °C 
23,0 ... 212,0 °F 

Accuracy Conductivity ±0,5% 

v.MW ±0,3 % FS or ±2 µs/cm 

Temperature ±0,2 

Connections Conductivity/ 

Temperature 

Permanently connected measuring cell 

Interface 
Analogue output 

Serial interface (3.5mm jack) can be connected to USB or RS232 interface of a PC 
via electrically isolated interface adapter USB3100, USB 3100 N, GRS3100 or 
GRS3105 (see accessories). Alternative selectable analogue output 0-1V 

Measuring cell   

Four-electrode-conductivity-measuring cell with integrated temperature sensor 

Electrode material special graphite 
Shaft material 

epoxy 

Size 

dia. 12 mm, length 120 mm 

Ambient condition -5 … +80°C (continuous) up to +100°C (short-duration) 

Display 

 

4 digit 7-segment (main and secondary display) with additional symbols 

Additional functions 

Min / max / hold 

Adjustment/Calibration 

Cell correction manually or automatically via selectable reference solution  

Data logger 

Real-time clock 
Cyclic: 10000 data sets, cycle time selectable: 1s … 60 min 
Single: 1000 data sets (with measuring point input, 40 selectable measuring point 
texts or numbers) 

Alarm 

2 alarm channels with separate limit values for conductivity (or resistivity, TDS, SAL) 
and temperature  
Alerting: buzzer / visual / interface 

Housing  

Break-proof ABS housing 

Protection class 

Front side IP65 

Dimensions 
L*W*H [mm] 

142 x 71 x 26 mm 

(L x W x H)

 

Working conditions

 

-25 to 50 °C; 0 to 95 % RH (non condensing) 

Storage temperature 

-25 to 70 °C 

Power supply   

9V-battery, typ IEC 6F22 (included in scope of supply) or external 

Current 
consumption 

2 mA (Out = Off)

Battery indicator  Automatically if battery exhausted 

 and ’ bAt ’ 

Auto-Off-Function 

Device will be automatically switched off if no key is pressed/no interface 
communication takes place for the time of the power-off delay. The power-off delay 
can be set to values between 1and 120 min.; it can be completely deactivated. 

Directives and standards 

The instruments confirm to following European Directives: 
 2014/30/EU 

EMC 

Directive 

 2011/65/EU 

RoHS 

Applied harmonized standards: 
 

EN 61326-1 : 2013 

emissions level: class B 
emi immunity according to table 3 and A.1 
Additional fault: <1% 

Summary of Contents for GMH 3451

Page 1: ...49 0 9402 9383 0 49 0 9402 9383 33 info greisinger de Please carefully read these instructions before use Please consider the safety instructions Please keep for future reference as of version 1 3 GMH...

Page 2: ...6 ELECTRODES MEASURING CELLS 8 6 6 1 Design 8 6 6 2 Calibration Adjustment of measuring cells 8 6 7 TEMPERATURE COMPENSATION 8 6 7 1 Temperature compensation nLF according to EN 27888 8 6 7 2 Linear t...

Page 3: ...ficant damage to property at non observance Attention This symbol warns of possible dangers or dangerous situations which can provoke damage to the device or environment at non observance Note This sy...

Page 4: ...ion If and bAt is shown in the lower display the battery has been used up and needs to be replaced However the device will operate correctly for a certain time If bAt is shown in the upper display the...

Page 5: ...shortly change over between measuring units only if InP SEt is selected press for 2 sec menu invoke configuration menu min max when taking measurements press shortly min or max value is displayed pre...

Page 6: ...tached to a belt etc The device with pop up clip at position 90 can be set up on a table etc The device with pop up clip at position 180 can be suspended from a screw or the magnetic holder GMH 1300 D...

Page 7: ...d solids measurement the filtrate dry residue is determined by means of the conductivity and a conversion factor C tdS Well suited for easy concentration measurements of e g salt solutions The determi...

Page 8: ...t see chapter 15 Accuracy Check Adjustment Service 6 7 Temperature compensation The conductivity of aqueous solutions depends on its temperature The temperature dependency is strongly dependent on the...

Page 9: ...Input Selection of measured variable Cond Conductivity rESi Resistivity tdS Total dissolved solids SAL Salinity SEt Change over measured variables by Set key TDS measurement conversion factor only if...

Page 10: ...uld correspond to output 0 V e g for 0 0 S cm 0 0 S cm 400 mS cm Measuring value that should correspond to output 1 V e g for 100 0 mS cm Set Corr Measurement correction Zero point adjustment offset o...

Page 11: ...be used The software also allows easy configuration and starting of the logger When the logger is activated Func Stor or Func CYCL the hold function is no more available the key store is solely used...

Page 12: ...rding Press store for 2 seconds Start menu press again automatic recording is started Each storage process is signalled by shortly displaying St XXXX where XXXX is the number of the saved data set If...

Page 13: ...es In case you want to develop your own software we offer a GMH3000 development package including A universally applicable Windows functions library GMH3000 DLL with documentation that can be used by...

Page 14: ...re different from default settings the device will shortly display Corr after turned on Default setting for offset and scale are off 0 0 i e inputs are not changed Zero point correction Displayed valu...

Page 15: ...orrect pH calibration The device provides the following functions to help with this 12 1 Calibration interval C Int You can input the interval after which the device reminds you to recalibrate The int...

Page 16: ...rer for repair Err 1 Measured value above allowable range Check pressure not within sensor range measuring value to high Sensor defective Return to manufacturer for repair Err 2 Measured value below a...

Page 17: ...at housing or sensor may be a risk for persons or environment Use an adequate transport package for reshipment especially for fully functional devices Please make sure that the device is protected in...

Page 18: ...l symbols Additional functions Min max hold Adjustment Calibration Cell correction manually or automatically via selectable reference solution Data logger Real time clock Cyclic 10000 data sets cycle...

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