Benetech GM510 User manual

1.Before use
Check up----------------------------(01)
Brief--------------------------------(01)
Features----------------------------(02)
Technical index-----------------------(02)
Panel-------------------------------(04)
Display-----------------------------(04)
Application--------------------------(05)
Definition for pressure-----------------(05)
CONTENT
2.Operation
Maintenance and keep up---------------(10)
Notification--------------------------(11)
How to operate-----------------------(06)
Reset and adjustment------------------(08)
3.Others
-01-
Check up
1.Before use
Thanks for your purchasing our product！Please
check the pack if there are following components and
contact the local dealer if there is any missing in the
pack or manual.
Brief
There are following 11 selectable pressure units:
bar、mbar、kPa、kgf/cm²、mmHg、cmH2O、Ozf/in²、
psi、inHg、inH2O、ftH2O. This unit features data save
and adjustment, automatic turn-off, connecting with PC
to read and export the data with a USB wire.
P
1.5V AAA battery
Operation manual
USB wire
Translucent silica gel hose
Transparent PVC hose
ressure manometer
CD
1PCS
4PCS
1PCS
1PCS
1PCS
2PCS
2PCS

Model
GM
GM
GM
GM
GM
GM
GM
GM
GM
GM
GM
GM
GM
GM
GM
GM
GM
GM
GM
GM
GM
GM
GM
GM
GM
GM
GM
GM
GM
GM
GM
GM
GM
510
511
520
510
511
520
510
511
520
510
511
520
510
511
520
510
511
520
510
511
520
510
511
520
510
511
520
510
511
520
510
511
520
Unit
bar
mbar
kPa
kgf/cm²
mmHg
cmH2O
Ozf/in²
psi
inHg
inH2O
ftH2O
Range
0.100
100.0
10.00
0.101
75.0
101.9
23.20
1.450
2.95
40.1
3.34
0.350
350.0
35.00
0.356
262.5
356.6
81.20
5.076
10.33
140.3
11.69
Resolution
0.001
0.1
0.01
0.001
0.1
0.1
0.01
0.001
0.01
0.1
0.01
Maximum pressure
0.500
500.0
50
0.509
375.0
509.5
116.00
7.251
14.76
200.5
16.70
1.500
1500.0
150
1.529
1125.0
1528.5
348.00
21.755
44.29
601.5
50.10
Environmental temperature compensation
Applicable to GM511/GM520, but not to GM510
-03-
-02-
Technical index
Features
1.L
2.
3.
4.
5.
6.
arge LCD
Data hold
With differential mode and record mode
USB port
Reset and data adjustment
Low battery indication and automatic power off
Measuring range
Accuracy
Repeatability
Linearity/hysteresis
Response
Low battery indication
Up overload indication
Down overload indication
Operating temperature
Storage temperature
Power supply
USB communication
GM510/GM511:±10kPa;
GM520:±35kPa
±0.3%FSO(25℃)
±0.2%
(Maximum＋/－0.5%FSO)
±0.29%FSO
Typical 0.5 s
Yes
Err1
Err2
0~50℃
-10~60℃
1.5V AAA battery*4
Yes

-04- -05-
1.
2.LCD
3.DIF
4.
5.
6.
7.
8.
Pressure input
mode key
Unit shift key
Backlight key
HOLD key
Record key
Power key
1.
2.
3.USB
4.L
5.
6.
7.
8.
9.
Data hold function
Record mode
communication
ow battery indication
DIF mode
Minimum/maximum value
Main display
Pressure unit
Record time
Panel
Display
3
7
8
4
5
6
8
7
2
5
6
21
9
3 4
DIF HOLD
UNITS
REC
Application
Definition of pressure
Widely applied in measuring the pressure of fans,
resistance/wind velocity/oven pressure/differential
pressure of filter, and monitoring the gas content in the
air in process of combustion.
The pressure in this manual refers to the intensity
of pressure, the force applied on a square unit.
absolute pressure：Difference between the reading
and the absolute zero.
Positive pressure means that the right pressure is
bigger than the left one.
Negative pressure means that the left pressure is
bigger than the right one.

-06- -07-
(3)
(4)
(5)
(6)
5.B
6.A
“no”
7.
8.USB
9.E
(1)Err1：
(2)Err2：P
(3)Err3：DIF difference beyond position limit
(4)Err4：DIF difference beyond negative limit
Press the REC key once again, MIN shows on the LCD
and minimum value and its pickup time will be shown
on the LCD.
Press REC key again, an average value shows with
AVG character.
Press REC again to show the maximum, minimum and
average value repeatedly in order.
Press the REC key for 2 seconds to exit record mode.
acklight
Press the backlight key to activate it.
uto turn-off
If there is no any further operation on the key within 1
minute, the unit will turn off automatically. This function
can be cancelled by pressing on the HOLD key for a
while and then turn the device on until appears on
the LCD.
Unit
Press the UNIT key to show 11 units for option.
Built-in USB port allows connection with PC.
rror
If there is any mistake reading appears, it will be shown
on the LCD as following:
Pressure beyond positive range
ressure beyond negative range
How to operate
1.P
2.
3.
“ ”
4.
(1) “ ”
(2)
ower supply
Press ON/OFF key to turn the unit on or off.
Difference
Press the DIF key to display the value that is the
difference between the current pressure and the
pressure value when press the DIF key, with
DIFFERENTIAL PRESSURE displayed on LCD.
HOLD key
Press HOLD key to hold the reading on the LCD with a
icon displayed on the upper left corner of LCD,
press HOLD key again to go back to normal measuring
state.
Record key
It is available to review MAX/MIN/ AVG values
under record mode.
Press the REC key and the character
shows on the LCD while all keys except ON/OFF key
and backlight will be locked, and time counter works
with the current time shows on LCD.
Press the REC key again, MAX shows on LCD and
the maximum value and its pickup time will be shown
on the LCD.
2.Operation

-08- -09-
Reset and calibration
Before being sent out of factory, the device has
been properly reset and calibrated with which
consumers are not expected to operate.
Reset
Pressure difference shall read zero after turning on, if
not, reset the device as the steps below: press the DIF
key and DIFFERENTIAL PRESSURE shows on the LCD,
meanwhile hold on pressing on the HOLD key for about
3 seconds until the zero appears which indicates the
reset is done, release the HOLD key and backlight key
to return to normal measure mode
Calibration
In operation, if there is any error between the device
and your standard, please calibrate it as the steps below:
Power on.
Hold on pressing the HOLD key and backlight key for
about 3 seconds until the reading shows on
LCD with its unit that is inner value of the
device, which may be ignored by the users and
indicates it is under calibration mode and the 2 keys
said above could be released.
1.
2.
(1)
(2)
“1.00”
“kPa”
(3)
GM510/GM511 ：1.00kPa~10.00kPa，
-1.00kPa~-10.00kPa
GM520 ：1.00kPa~35.00kPa，
-1.00kPa~-35.00kPa
(4)
(5)
3.
：
(1)
(2)
(3)
(4)
(5)
(6)
(7)
Press on the DIF key to increase 1 kPa and hold on
pressing the DIF key for 2 seconds to increase the
value quicker.
calibration range
calibration range
Press the HOLD key after selecting the desired value
for calibration and import the differential value into
the device.
Press the backlight to exit calibration mode and
return to normal measurement mode. If there is any
further calibration repeat the step4 and step 5.
Restore ex-factory setting
Users may restore the device to ex-factory settings if
the calibration data confused due to mistake operation.
Holding on pressing the DIF key, HOLD key, backlight
key and REC key at one time
Power on the device
After full display and 0 appears release the REC key
At 00 appearing release the backlight key
At 000 appearing press the backlight key and REC
key
At 0000 appearing release all the keys and complete
the operation
After restoring to ex-factory setting, refer to point 1
and point 2 above for reset and calibration if necessary.
10.Battery replacement
“ ”flashes when the battery is insufficient, replace
it with 4 1.5V AAA batteries.

-10- -11-
Keep-up and maintenance
Notes
1. :Keep-up
Case cleaning
Use only the fresh water to clean the case of the
product, forbidden to use any erosive liquid such
as alcohol etc.
Never impact it or operate and store it in humid
environment
Do not store the product in the environment
below:
a.Humid or dusty environment
b.High density of salt or sulfur
c.Environment full of the other chemical gas
d.High temperature or humidity, or environment in
direct sunlight.
2.Maintenance:
We hold no responsibility for the product due to the
following reason:
Unauthorized disassembly of the product, improper
transportation after purchasing and wrong storage,
Please refer to the guaranty card offered.
damage due to abuse, failure to provide purchasing
proof or unauthorized amendment on the purchasing
invoice/guaranty card
3. ：
a.
b.
Claim
We reserve the right to change the specification
or instruction manual of the product without further
notification.
Old battery dealing must be complied with the
local law and regulations.
1 .This product has been calibrated before loading, do
not change the parameters without the presence of
professionals and equipment.
2 .Amendment and maintenance must be kept by
professionals not just doing it with reference to the
manual.
3 .Clean the unit with cloth only without any solvent or
liquid.
4 .Take out the battery if the unit is expect not to be
used.
3、Others