Bently Nevada 3500/40 135489-04 Analog output sensor

Description

3500/40 135489-04 Test Procedure
1. Purge the sensor with clean air at the end of verification, and verify that the
channel reading is 0% ± 2% LEL. If it is not, repeat the calibration process and
this step.
2. Apply the test gas.
3. Verify that the test gas activates any configured Alert/Alarm 1 and
Danger/Alarm 2 that is below the value of the applied gas.
4. Turn off the gas cylinder valve and remove the calibration boot from the gas
sensor. The reported gas concentration will drift to 0% LEL. This will lower the
detected levels and remove the alarm conditions. The indicators for “Latching”
alarms should persist and those for “Non-latching” alarms should clear. The
digital readout does not latch and will still display the currently detected level
of gas for “Latching” as well as “Non-latching” alarms. Reset any “Latching”
alarms.
5. Repeat Steps 1 through 4 for all channels you wish to test.

Test Procedure
1. Disconnect the black wire from a gas sensor at the 3500/63 I/O module (or ET
block). The OK LED on the front panel of the main module should go off. The
Bypass LED should come on.
2. Observe the Verification screen within the 3500 Configuration Software. Verify
that
• the Channel OK State line and the Monitor OK State line read Not OK,
• the Channel Bypass line and the Monitor Bypass line read Enabled, and
• the Direct bar graph is grayed out and labeled Invalid.
3. Observe the Alarm Events List within the 3500 Configuration software. Verify
that the software posted an Entered Not OK event for the given channel to the
list.
4. Observe the System Events List within the 3500 Configuration software. Verify
that the software posted Fail HG Xdcr Check/Recal and Probable Open
Transducer events for the given channel the events to the list.

5. If you do not obtain the above results, go to Section 9.1.7, If a Channel Fails a
Verification Test. Otherwise proceed to Step 6.
6. Reconnect the black wire from the gas sensor to the appropriate terminal on
the back of the I/O module (or ET block, if using an ET I/O module). Verify that
the OK LED on the front panel of the main module comes on and that the
bypass LED goes off.
7. Observe the Verification Screen within the 3500 Configuration Software. Verify
that:
• the Channel OK State line and the Monitor OK State line read OK,
• the Channel Bypass line and the Monitor Bypass line read Disabled, and
• the Direct bar graph is displaying a value and is labeled PPL OK.

8. Observe the Alarm Events List within the 3500 Configuration software. Verify
that the software posted a Left Not OK event for the given channel to the list.
The software may have also posted Entering and Exiting Alert and Danger
messages to the list, depending on the transient input the monitor received
when the black wire was reconnected and the configured alarm time delays.
The message list should end with Exit Alarm messages, unless the alarms
have been configured as latching. In that case you can clear the latched
Alarm(s) by pushing the Reset button on the front of the rack and then
verifying that the software has posted the Exit Alarm message(s) to the list.
9. Observe the System Events List within the 3500 Configuration software. Verify
that software posted Pass HG Xdcr Check/Recal, Xdcr OK, and Recommend
Recalibration events to the list for the given channel . You need not recalibrate
the sensor at this point because you are just reconnecting the originally
calibrated sensor for this channel. The monitor will continue to use the
calibration scale factor previously calculated and stored on the I/O for this
sensor.
10. If you do not obtain the above results, go to Section 9.1.7, If a Channel Fails a
Verification Test, on page 90.
11. Repeating the same procedure with the red wire will give the same results,
except that you will not see a Fail HG Xdcr Check/Recal event in the System
Events List, nor will software post Enter and Exit Alarm messages in the Alarm
Events List after you reconnect the red wire.
12. Disconnecting the white wire will cause the CAL LED to flash and Bypass LED
to light and the OK LED to go off.

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135785-01 3500/93 Display Unit, non backlighted
135785-02 3500/93 Display Unit, back-lighted
137412-01 3500/93 Manual
135799-01 3500/93 Display Interface Module
135799-02 3500/93 Display Interface Module
(use with A05 option only)
135813-01 3500/93 Display Interface I/O
Module
136634-0010-01 10 Foot (3 metres) Cable (PVC)
136634-0050-01 50 Foot (15 metres) Cable (PVC)
136634-0050-02 50 Foot (15 metres) Cable
(Teflon? )
136634-0100-01 100 Foot (30 metres) Cable (PVC)
136634-0100-02 100 Foot (30 metres) Cable
(Teflon? )
130121-02-01 500 Foot (152 metres) Extension
Cable (PVC)
130121-02-02 500 Foot (152 metres) Extension
Cable (Teflon? )
02200271 External Power Supply for 115 Vac
02200272 External Power Supply for 230 Vac
138227-01 Cable Adapter
146085-01 Power Cable
137224-01 System Mounting Assembly
(sheet metal for A01 & A05
options)
04309007 4-40 X 0.63 Phillips head screw for
System Mounting Assembly, 4 are
required