Dräger PEX 3000 Manual Del Usuario página 30

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Control
Measuring mode
Display of the measured value 0 to 99 or 0 to 9.9
Current output 4 to 20 mA
long
Key
▼M
(>3 s)
short (>1 s and <3 s)
▲
ZE
Adjust
zero-point ▼
▲
SP
Adjust
sensitivity
▲
SL Keys Current output
Test 4-20 mA ▲+▼ 4.0 mA
▼
▲
CL Keys Current output
Adjustment 4-20 mA
▲+▼ 4.0 mA
▼
▲
CU Keys Current output
Set sensor current ▲+▼ 3.4 mA
▼
▲
dP Keys Current output
Set decimal point ▲+▼ 3.4 mA
▼
▲
So Keys Current output
Software Version ▲+▼ 3.4 mA
▲
AZ Keys Current output
Autozero ▲+▼ 3.4 mA
If no key is pressed in any status condition for more than 4 minutes, the menu is closed automatically without saving
and the current measured value is displayed again.
30
Fault has Fault
occurred rectified
Fault
Display E0 to E8
Current output 1 mA
Keys Current output Calibrate
▲+▼ 3.4 mA zero-point
Keys Current output Calibrate
▲+▼ 3.4 mA sensitivity
Calibration menu
Set current
output to X mA
Calibrate
power signal
Calibrate
sensor current
Display decimal
point
Display the
software version
Autozero status
display
Maintenance menu
4.3 Calibration menu
To enter the calibration menu, press the ▼ key for more than one second but
less than three seconds. The display shows a flashing point on the bottom right
indicating the calibration mode.
4.3.1 ZE – Calibrate the zero-point
1. Navigate using the ▲ or ▼ keys until the display shows ZE ("ZEro") and
confirm by pressing the (▲+▼) keys. The output signal switches to 3.4 mA.
– The display shows the currently measured gas concentration (negative
values are displayed up to "–5" or "–,9").
2. Apply zero gas to the sensor and wait for signal stabilisation (max.
3 minutes).
3. Press the ( +▼) keys to save the displayed value as a new zero-point.
4. Press the (▲+▼) keys once again to exit the function. The ZE display
appears once again.
5. Press the ▼ key to the calibrate the sensitivity or
6. Press the button to switch back to the measuring mode.
4.3.2 SP – Calibrate the sensitivity
1. Navigate using the ▲ or ▼ keys until the display shows SP ("SPan") and
confirm by pressing the (▲+▼) keys.
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