GREISINGER GMH 3330 Operating Manual Download Page 10

H40.0.01.6C-09 

Operating Manual GMH 3330 

Page 10 of 16

 

 

Measurements Using Flow Measuring Probes STS005 / STS020

 

 

Two types of measuring probes are available for flow speed measurements: 
 
Please note:   

-use 

STS 005 

to measure 

water 

flow 

-use 

STS 020 

to measure 

air 

flow

 

Incorrect use will result in incorrect measurements! 
 
Please observe max. measuring ranges for flow measurements! 

-STS 005: 0.05 ... 5.00 m/s (water) 
-STS 020: 0.55 ... 20.00 m/s (air) 
 

Higher speeds may destroy the measuring head or may, at least, permanently influence measuring accu-
racy. 
An arrow on the measuring head indicates the required flow direction. 
Flow measuring probes are 'free-jet calibrated', i.e. the diameter of the flow channel has to be 5 times 
bigger than the diameter of the flow measuring head (= approx. 5 cm, otherwise measuring errors up to 
40%). 
When evaluating the measuring results please also note that in a channel the flow speed is usually higher 
in the middle of the channel than at its edges. Therefore, use appropriate tables to calculate air flow by 
means of flow speed. 

Averaging for Flow Measurements: 

When taking flow measurements fluctuations tend to be quite high. To be able to display a stable measur-
ing value two averaging functions have been integrated in the instrument. 

Continuous Averaging 

The average value displayed has been calculated from the past few measurements conducted during the 
averaging time set. After the instrument has been switched on, the time remaining till expiration of the 
averaging time will be displayed at the bottom line of the display. The min. and max. values memorized 
refer to the minimum and/or maximum average value displayed. 

Average Hold 

As soon as the GMH3330 instrument has been switched on the device starts calculating the average flow 
value during the averaging time. During measuring the 

current measuring value 

will be shown in the top 

line of the display while the bottom line shows the remaining measuring time. As soon as measurements 
have been completed the 

average value 

will be displayed and the device will switch to the HOLD mode. 

The min. and max. values memorized refer to the minimum and/or maximum measuring value established 
during averaging. 
To start a new measuring series press the key "Store" (key 6). 

Additional Measurements with any NiCr-Ni-Temperature Probe at T2: 

Use temperature channel T2 to take measurements of medium temperature, for example. The value 
shown ist not an average value.  

 

 

Summary of Contents for GMH 3330

Page 1: ...93128 Regenstauf 49 0 9402 9383 0 49 0 9402 9383 33 info greisinger de Digital Precision Hand held Measuring Device For Atmospheric Humidity Temperature Dew Point Dew Point Distance Enthalpy and Flow...

Page 2: ...COMBINATION MEASURING SENSOR TFS0100 9 7 MEASUREMENTS USING FLOW MEASURING PROBES STS005 STS020 10 8 NOTES TO SPECIAL FUNCTIONS 11 8 1 ZERO DISPLACEMENT OFFSET 11 8 2 DISPLAY CORRECTION FACTOR CORR 1...

Page 3: ...ombined with the combined measuring probe TFS 0100 is designed for room climate meas urements This includes gauging of atmospheric humidity temperature dew point dew point distance and enthalpy Togeth...

Page 4: ...n lead to malfunctions or destroying of the device and the connected devices This device must not be run with a defective or damaged power supply unit Danger to life due to electrical shock 4 Do not u...

Page 5: ...g 4 1 Display Depending on the measuring probes sensors connected the following measuring results can be displayed TFS 0100 Main display r H relative atmospheric humidity in Secondary display possible...

Page 6: ...ing press Menu for 2 sec configuration menu is activated Store Quit Measurement Hold current measuring value HLD in display for flow meas in AVGHold mode start new measurement or handling of logger fu...

Page 7: ...tc 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 Device attached to...

Page 8: ...ll be multiplied by this factor off Factor is deactivated 1 000 Power off Selection of Power Off Delay 1 120 Power off delay in minutes Device will be automatically switched off as soon as this time h...

Page 9: ...ergy con tent of air with a relative humidity of 0 and 0 C is 0kJ kg The warmer the air the higher the relative hu midity the higher the energy content Therefore more energy is required to heat up hum...

Page 10: ...tions tend to be quite high To be able to display a stable measur ing value two averaging functions have been integrated in the instrument Continuous Averaging The average value displayed has been cal...

Page 11: ...sses of all devices must not be identical In case several devices will be connected via one interface make sure to configurate the base addresses accordingly Channel 1 will be addressed by the base ad...

Page 12: ...values a stable value has been de tected and can be taken over by means of the Store key key 6 Then the next calibration step will be displayed 3 Calibration point 2 Put sensor into suitable calibrat...

Page 13: ...cable defective replace Values below measuring range check are there any values below the measuring range specified meas value too low Sensor cable defective replace System fault switch on again if fa...

Page 14: ...Windows 7 Windows 8 8 1 Windows 10 Programming examples Visual Basic 4 0 Delphi 1 0 The following interface functions will be supported Channel Dll Code Name function 1 2 3 4 5 6 x x x x x x 0 Read n...

Page 15: ...lip for table top or sus pended use Weight approx 160 g Interface serial interface 3 5mm jack serial interface can be connected to RS232 or USB inter face of a PC via electrically isolated interface a...

Page 16: ...dequate transport package for reshipment especially for fully functional devices Please make sure that the device is protected in the package by enough packing materials 13 2 Disposal instructions Bat...

Reviews: