Setting Analog Span; Testing The Analog Interface; Setting Capture Range; Setting Sensor Lock - Dräger Polytron 8900 UGLD Notice D'utilisation

3. Set the current and confirm.
 The setting for the Analog offset is displayed.
4. Select Confirm and confirm with [OK].

11.2.11 Setting analog span

This function adjusts the analog output at 20 mA without
affecting the 4 mA set point.
1. Select Settings > Communication > Analog interface >
Analog span and confirm.
2. Select the line for editing the offset (range: -0.5 to 0.5 mA,
SIL: -0.1 to 0.1) and confirm.
3. Set the current and confirm.
 The setting for the Analog span is displayed.
4. Select Confirm and confirm with [OK].

11.2.12 Testing the analog interface

These functions change the current of the analog interface for
test purposes (e.g. to check the programming of the control
unit). It might be necessary to inhibit the alarms at the control
unit to avoid false alarms. After exiting these functions, the
currents automatically return to the maintenance signal.
During the test, the maintenance symbol
● To set current or concentration:
1. Select Settings > Communication > Analog interface
and the desired option.
Set Current
Set concentr.
2. Once the alarms at the control unit are inhibited, confirm
the message Inhibit all alarms with Next.
3. Select the line for editing and confirm with [OK].
4. Set the desired value.
5. Select Next and confirm.
6. Select the desired option:
Set concentr. out /
set current out
concentration off /
current off
7. Select Next and confirm.
 The function is aborted.
8. Once the alarms at the control unit are enabled again,
confirm the message Enable all alarms.
● To set a test signal:
Instructions for use |
Dräger Polytron
is displayed.
This function sets the current
to any value between 0 and
22 mA. Analog offset and
analog span are not used for
this function.
This function sets the current
corresponding to any mea-
surement value between
0 %and full scale deflection.
This function sets the preset
measurement value or cur-
rent test value.
During the test, the mainte-
nance symbol is displayed.
This function aborts the
transmission of the preset
test value.
®
8900 UGLD
1. Select Settings > Communication > Analog interface
and the desired test.
Set fault
Set warning
Set mainten.
2. Once the alarms at the control unit are inhibited, confirm
the message Inhibit all alarms.
3. Select Enable or Disable and confirm.
12 Sensor settings
Ultrasonic sensors are not suited for auto calibration because
the zero point of the sensor must only be calibrated under
laboratory conditions.

12.1 Setting capture range

1. Select Settings > Sensor > Display Capture and
confirm.
2. Set offset in the first window.
3. Set the lowest value of the capture range and confirm with
Next.
4. Set the highest value of the capture range and confirm
with Next.
5. Check all the values and confirm with Next.
12.2 Resetting sensor
This function resets the sensor to factory default settings.
1. Select Settings > Sensor > Init. channel and confirm.
2. Select Confirm and confirm with [OK].
12.3 Setting calibration interval
After the calibration interval expires, the instrument will issue
a warning that the calibration is past due.
1. Select Settings > Sensor > Cal. interval and confirm.
2. Set the calibration interval and confirm with [OK].

12.4 Setting sensor lock

1. Select Settings >Sensor > Sensor lock and confirm.
2. Select On or Off.
On The instrument rejects any sensor whose
part number does not match the part num-
ber of the previously installed sensor.
Off The instrument accepts any suitable sensor,
uploading the default settings of this sensor.
However, this overwrites any customized
settings with the default settings of the new
sensor.
|
Sensor settings
Sets the current to the fault
current.
Sets the current to the warn-
ing current.
Sets the current to the main-
tenance current.
en
21