GREISINGER GDH 200-14 Digital Vacuum Barometer and Manometer Instruction Manual

GREISINGER GDH 200-14 Digital Vacuum Barometer and Manometer Instruction Manual

Intended use

The device measures the absolute pressure of air or non corrosive / non ionizing gases.
Either the ambient air pressure can be measured or the measuring pressure is connected with a suitable tube to the connecting nozzle.
Relative measurements can also be realized via the integrated Zero-function.
QField of application

• Barometric measurements (weather)
• Vacuum measurement (down to 1 mbar abs)
• Overpressure measurements pneumatics, tyre pressure etc.
  The pressure connection has to be done adequately! At higher pressures the connection tube has to be locked. Please refer to chapter „Pressure Connection“.

The safety instruction (see chapter 3) have to be observed.
The device must not be used for purposes and under conditions for that the device had not been designed.
The device must carefully dealt with and has to be used according to the specifications (do not throw, knock, etc.). It has to be protected against dirt.

General advice

Read through this document attentively and make yourself familiar to the operation of the device
before you use it. Keep this document in a ready-to-hand way in order to be able to look up in the
case of doubt.

Safety instructions

This device has been designed and tested in accordance to 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 it.

1. Trouble-free operation and reliability of the device can only be guaranteed if it is not subjected to any other climatic conditions than those stated under “Specification”.
   Transporting the device from a cold to a warm environment condensation may result in a failure of the function. In such a case make sure the device temperature has adjusted to the ambient
   temperature before trying a new start-up.

2. Whenever there may be a risk whatsoever involved in running it, the device has to be switched off immediately and to be marked accordingly to avoid re-starting. Operator safety may be a risk if:

   • there is visible damage to the device or the device is not working as specified
   • the device has been stored under unsuitable conditions for a longer time
     In case of doubt, please return device to manufacturer for repair or maintenance.

3. Warning: Do not use this product as safety or emergency stop device, or in any other application where failure of the product could result in personal injury or material damage.
   Failure to comply with these instructions could result in death or serious injury and material damage.

Operation notes

• If the symbol “LOBAT” is displayed at the left side of display, the battery is weak, measuring can be continued for a short period. If “BAT“ is displayed  in the main display the battery is used up and needs to be replaced. Measuring is no more possible.
• The battery has to be removed, when storing device above 50 °C.

Hint: We recommend removing the battery if device is not used for a longer period of time! Risk of leakage!

Operation

Display elements

1. Main display
   
   Display of current measuring value or of minimal measured value (“Lo” blinking) or maximal value (“Hi” blinking) LOBAT Indicates low battery

2. Pushbuttons : on/off: on/off switch, press key long to switch device off mode: press short: changes between actual measuring value, the minimal measured value (“Lo” blinking) and maximal measured (“Hi” blinking) value.
   press >2s: reset Min and Max value
   zero: press >2s: activates / deactivates the “Zero-function“

Starting

Switch the device on with button .
After the segment test ( ) the device displays some information to its current configuration:
OFFS, if offset correction is active
, if scale corrections active
Unit of meas. value: nbAr (=mbar) | bar | PSI | nnHg (=mmHg)
SEA.L, if sea-level correction is active
P.OFF, if auto power-off is active
Afterwards the device is ready for measuring.

Pressure Connection

The pressure is connected to the instrument via the front side pressure port. This is optimised for the connection of 6×1 mm (4 mm inner diameter) tubes.
Suitable tubes are:
PVC up to 5 bar rel.
PE up to 10 bar rel.
PUR up to 9 bar rel.
At pressures above 2 bar rel. the tube should be locked e.g. by means of a cable strap or a hose clamp.

• 
  PUR tube and hose clamp

• 
  Up to 2 bar rel.

• 
  Above 2 bar rel: lock with clamp

Min-/max- value memory

Display MIN-value (Lo): Press button mode shortly Display changes between ‘Lo’ and min-value
Display MAX-value (Hi): Press mode shortly again Display changes between ‘Hi’ and max-value
Display actual value again: Press mode shortly again Actual value is displayed
Delete MIN/MAX: Press button mode for 2 s MIN&MAX are deleted. ‘CLr’ (Clear) is displayed shortly

The Min-/max- display is automatically set to actual value display after 10 s.
The Min-/max- values are deleted if the device is switched on after it had been turned off.

Zero-function (relative measuring)

With help of the Zero-function relative measurements can be realized: press “zero“-button for 2s.
“ NULL“ is displayed shortly and the displayed value is set to 0. Press again “zero“ for 2s to display the absolute value again.

Note: Setting and resetting the Zero function will delete your min-/max- value memory.
Field of application: e.g. tyre pressure measurement, pneumatic measuring up to 10 bar rel.

General information about pressure measurement

The device measures the absolute pressure. This must not be confused with the pressure at sea level display by weather stations. There the pressure loss due to height above sea level is deducted. The device is also able to perform this sea-level correction on the displayed air pressure.

Therefore (Sea Level correction) has to be activated (= “on”) and the current height above sea level (ALTI = Altitude in [m]) has to be entered at the configuration.

Measurement accuracy at > 5 bar
Highest accuracy is achieved, if the measurement duration during high pressure measurements (> 5 bar) is limited to max 5 min.
At longer durations a reversible offset may appear. This settles within 15min after disconnection from pressure, but keeps in between the specified accuracy (see Specification).
Short measurements can achieve significant higher accuracy than stated in the specification!

Configuration of the device

Follow this instructions to configure the functions of the device:

• Switch the device off.

• Press mode button and keep it pressed. Turn the device on. Release the mode button after the
  segment test ( ) finished. The first parameter “P.OFF“ is displayed.

• If a parameter should be changed press key up or down (  ) the present setting of the parameter will be shown and can be changed via up/down keys.
  The parameter setting is confirmed by pressing .

• Jump to the next parameter with

for thetime adjusted in this parameter, the device is automatically switched off to safe battery power. (adjustable range 1 to 120 min)
O| automatic power-off is deactivated (continuous operating)
| Unit and range of display factory setting: nbar=mbar
PSI| 0 … 160.00 PSI, resolution 0.02 PSI
nnHG| 0 … 8250 mmHg, resolution 1mmHg
nbAr| 0 … 11000 mbar, resolution 1 mbar
bAr| 0 … 11.000 bar, resolution 0.001 bar
| Sea-level correction factory setting : off
O| Sea-level correction off
ON| Sea-level correction on
| Altitude input for sea-level correction factory setting : 340
-500 … 9000| -500 … 9000 m selectable
| Restore to factory settings
NO| Settings are kept
| YES| Restoring device to factory settings

Pressing again stores the settings, the instruments restarts (segment test)
Please note: If there is no key pressed within the menu mode within 2 minutes, the
configuration will be cancelled, the entered settings are lost!

Adjusting of the instrument

To adjust the instruments according to your needs proceed like follows:

• Switch instrument off.

• Press zero button and keep it pressed. Turn the device on. Release the mode button after the segment test ( ) finished. The first parameter “SCL“ is displayed.

• If a parameter should be changed press key up or down ( ) the present setting of the parameter will be shown and can be changed via up/down keys.
  The parameter setting is confirmed by pressing .

• Jump to the next parameter with .

Parameter

| value|

information

|
---|---|---|---
| buttons

|  |
|

Offset of sensors factory setting : off

|
O

-5.0 … +5.0

| Selectable -5.0 … +5.0|
|
|

Scale correction factory setting : off = 0%

|
O

-5.00 … +5.00

|

Adjustment in %

|
 |

Pressing again stores the settings, the instruments restarts (segment test)
Please note: If there is no key pressed within the menu mode within 2 minutes, the adjusting will be cancelled, the entered settings are lost!

Notes to the calibration services

Calibration certificates – DKD-certificates – other certificates:
If device should be certificated for its accuracy, it is the best solution to return it with the referring sensors to the manufacturer. (please state desired test values, e.g. 1bar abs)
Only the manufacturer is capable to do efficient recalibration if necessary to get results of highest accuracy!

Error and system messages

or far outside allowable ambient temperature range)
—| Sensor error or value could not be calculated

If the symbol “LOBAT” is displayed at the left side of display, the battery is weak, measuring can be continued for a short time.
If “BAT” is displayed in the display the battery is used up and needs to be replaced. Measuring is no more possible.

Specification

 |
---|---
15 Specification Measuring range air pressure :| 0 … 11000 mbar abs., resolution 1 mbar0 … 11.000 bar abs.,         resolution 0.001 bar0 … 8250 mmHg abs.,       resolution 1 mmHg0 … 160.00 PSI abs.,         resolution 0.02 PSI
Measuring media:| non corrosive gases
Max. overload:| 13 bar abs.
Accuracy: (±1 digit)| Hysteresis and linearity (at nominal temperature 25°C)-          <5bar: ± 3 mbar or ± 0.10 % of meas. value, whichever is higher-          <5bar: ± 0.20 % FS (see note in “10 General information about pressure measurement”)+/- 0.30 % FS temperature influence 0 to 50°C
Pressure connection:| connecting nozzle made of nickel-plated brass on top of the device,for tubes 6x1mm (4mm inner Ø), approx. 11mm projecting
Measuring frequency:| 1 measurement per second
Offset and scale:| digital offset and scale adjustment for air pressure measurement
Min-/max-value memory:| min- and max- value are stored
Sea level correction:| The displayed value can be referenced to sea level. Therefore thecurrent height above sea level has to be entered.
Zero-function:| relative measurement: the displayed value is set to “zero”
Display:| approx. 13 mm high, 4½-digit LCD display
Pushbuttons:| 3 membrane keys for on/off, min-/max-value request, offset adjustment
Working conditions:| -25 to 50 °C; 0 to 80 % RH (non condensing)
Storage temperature:| -25 to 70 °C
Power supply:| 9V-battery, type 6F22 (included in scope of delivery)
Current consumption:| ca. 60 µA (Operating time with standard zinc-carbon battery >7500hours
Display for weak battery:| automatically if battery consumed “BAT”, warning: “LOBAT”
Auto-off function:| If activated: device will be automatically switched off if not operated forlonger time (selectable 1..120min)
Housing:| impact resistant ABS housing, front side IP65
Dimensions:| approx. 106 x 67 x 30 mm (H x W x D) , without connecting nozzle
Weight:| approx. 135 g incl. battery
EMC:| The device corresponds to the essential protection ratings established in the Directives of the European Parliament and the council on the approximation of the laws of the member states relating to the electromagnetic compatibility (2004/108/EG). Additional error: <1%

Disposal notes

Dispense exhausted batteries at destined gathering places.
This device must not be disposed as “residual waste”.
To dispose this device, please send it directly to us (adequately stamped).
We will dispose it appropriately and environmentally friendly.

References

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