A: When the 3000T enters zero mode, the instrument constantly checks whether the amplifier has dropped to the 0-10 PPM gain, the highest gain. In the AUTO mode, it will not zero the instrument until reaching this gain.

If the analyzer is zeroed in MANUAL mode, the analyzer will check that the instrument is in the highest gain when the operator presses the Enter key to accept the zero. If the amplifier is in the highest gain, it will accept the zero. Otherwise it will flash the following message on the second line of the LCD display:

"Input Still Too High"

And the instrument will continue in zero mode. Thus the operator must wait until the reading drops further. If the analyzer reads less than 10 PPM, the analyzer will accept the zero.

If the analyzer has dropped to the highest gain but is zeroed prematurely, the analyzer will take the zero but will display the following message:

"CELL FAIL / ZERO HIGH"

And the system alarm will close to indicate the analyzer senses the cell output, although less than 10 PPM, has not dropped as far as possible. A good zero level is a reading of less than 5 PPM.

Consider the following:

Did the sensor need more time to stay on "zero" gas to drop to a reasonable level?

Is the zero gas acceptably pure?

Is there a leak in the system that does not let the sensor drop further?

Is the sensor old?

When the sensor is old, the offset of the cell becomes larger, making the cell sluggish when lowering to a zero reading. If this is the case, replace the cell.

The only way to cancel an error message is to turn the instrument off and back on again. Press the Escape key on a standard 3000T or 3010T, or the Enter key on the 3020T to return to a previous calibration. Remember the instrument did accept the zero. The system alarm will reset too. You can keep working with this zero calibration if you prefer, but Teledyne recommends considering the above trouble-shooting questions.

Q: What is the maximum resistance that can be used in series with the 4-20mA output (isolated) on the 3000 models?

A: The maximum resistance is 1.0k Ohms.

Q: What is the maximum resistance that can be used in series with the 4-20mA output (isolated) on the 3190 and 3290 models?

A: The maximum resistance is 500 Ohms.

Q: What is the power consumption for the Model 3020T?

A: The power consumption is 150 watts.

Q: How do I cold start a 3000 series instrument?

A: Cold start procedures can be found here.

Q: Can you recommend a manufacturer and model for a 0.5 micron filter?

A: We recommend Swagelok / Nupro part number SS-4F-05.

Q: I am getting a Preamp 2 fault message on my Model 3000PA. What does that mean?

A: The failure code Preamp 2 indicates there is a problem with either the thermistor or the pre-amp board in the instrument. A troubleshooting procedure for this issue can be found by downloading thisPDF file.

Q: What do the error codes mean for the 3000 series?

POWER
1	+/- 5 volts power supply failure
2	+/- 15 volts power supply failure
3	+/- 5 and +/- 15 volts power supply failure
ANALOG
1	Percent of range output failure
2	Range ID output failure
3	Both percent of range output failure and range ID output failure
AMPLIFIER
1	Amplifier offset is too high
2	Unexpected output with test signal input to amplifier
3	Both above

Q: How do I reset the password on my 3000 if I have forgotten the old one?

A: The only way to reset the password is to do a cold start. This will reset everything else too.

- Turn the instrument off and then back on.

- During the introduction screen, press the System key for factory defaults.

- Recalibrate, and check range and alarm setup.

Q: For the 3000PA / PB and 3000TA / TB, please clarify for each exactly what conditions will cause the system alarm to activate.

A: 3000PA / PB

A failure during an operator initiated self test will trigger the alarm.

The instrument checks the power supply every 10 minutes. If the power supply voltages go out of specification, that will trigger the alarm.

3000TA / TB

A failure during an operator initiated self test will trigger the alarm.

The instrument checks the power supply every 10 minutes. If the power supply voltages go out of specification, that will trigger the alarm.

If the sensor zero offset is too high ( >5ppm O2 approx.) after the zero function, it will trigger the alarm.

A failure to span due to the sensor output being too low will trigger the alarm.

Q: What is the procedure for connecting a PC to the Model 3000T?

A: This procedure can be found by downloading this PDF file.

Q: For the 3000TA, what is the exact format of the RS-232 message?

A: When the instrument is turned on, a 3000 series instrument sends a heading through the RS232 that reads something like this:

TET/AI Model 3000T
Oxygen Analyzer

It will send nothing while the instrument is in self-diagnostic mode, collecting electronic zeroes, while in the span mode, and while on the zero mode.

In the sample mode, a stream of data is sent every two seconds and it looks like the following text string:

ST, 0.00 ppm, RA-LO 0-100 ppm, AL-1 DISABLED, AL-2 ON, (CR)

The above stream of data is interpreted as follows:

1. ST means start

2. 0.00 is the oxygen concentration.

3. PPM or % are the unit of concentration

4. RA means the instrument is set to auto ranging \ RF means the instrument is set in a specific range of interest. The range the instrument is on follows: LO, MED, HI, or CAL.

5. 0-100 ppm is the setting for the LO range, (0-100 ppm is factory default for the LO range but the customer could set this range to other values)

6. Alarms that disabled or tripped end the text string:

a. AL-1 DISABLED means that alarm 1 has been turned off or disabled

b. AL-2 ON means that alarm 2 has been tripped

c. If there is no message about either alarm 1 or alarm 2, it means that the alarm is not disabled but has not been tripped

7. Carriage return is at the very end to start a new line.

Q: What material is used in oxygen scrubbers?

A: The scrubber material is Copper Oxide and Aluminum Oxide catalyst.

Q: What is the size of the orifice in each of the restrictors on the 3000TB?

A: R2323 is 15/1000th (0.015) inches
R2324 is 9/1000th (0.009) inches

Q: Should we use another class of cell?

A: The B-2C sensor will not work for high CO2 levels. This will damage the sensor. You should use an A-2C sensor and purge the unit at all times with a similar level of CO2 when not in use.

Q: When we lose A/C power to our location (it is a remote pipeline site) can we set up the analyzer to come back up in the correct range (fixed LO Range 0-5 ppm) and with the same calibration settings? Or could this be accessed by the RS232 port remotely to reset the analyzer?

A: The analyzer is already designed to do just that. After a power loss the instrument will retain the previous settings, unless someone physically switches the unit to return to factory default settings.

When power is returned to the analyzer, the analyzer will automatically do a self diagnostics, and will give you the option to either turn switch to 'Enter' position keep the previous settings, or to turn the switch to the 'Escape' position to return to the factory default settings.

After one minute and no choice is made, the analyzer will automatically return to the previous settings that you had selected in the set-up mode.

So no action is required from you. To keep your all previous settings, including your (fixed Low range 0-5ppm), and the calibration span gas value setting.

A short power interruption will not affect the calibration. however, if the power loss is long-term, or if the sensor is old, the output may have drifted and re-calibration would be required. Periodic recalibration is part of normal maintenance of the analyzer.

Q: How do I replace the membrane keypad on my 3000TA?

A: The membrane keypad can be replaced by first removing the lock retainer and then the lock assembly. Peeling off the old membrane, and clean off the glue from the surface before installing the new membrane keypad. Care must be taken when installing the new membrane. make sure it is aligned properly before it is sticking it to the surface, as it will be damaged if lifted again.

The keypad is two items:
P/N D76672 is the keypad.
P/N B76673A is the 3000T ID label, to be installed on the keypad.

The easier solution is to replace the complete door assembly, which is ready for installation. This complete door assembly (P/N C66285A) also includes a new display pc board assembly.

Q: We are installing an oxygen analyzer (ppm O2 in N2 and Argon). The analyzer will be 150m away from the process connected by tubing. Will it work correctly despite the distance?

A: A 150 meter run for a sampling line won't be an issue provided that 1) line execution is done with internal corrosion free material (stainless steel is recommended, plastics must be avoided), 2) high quality fittings are used, and 3) there are no multiple moisture accumulation points.

If the line cannot be installed with a single slope with the bottom point at the process tap, then one single bottom point should defined at any position along the line run. At this bottom point a water purging valve should be installed.

The only problem related to distance is the lag time from sample take off to actual analysis.

When analyzing O2, N2 or Ar in liquid storage tanks, lag time is not a problem. However, if the measuring is done for process control purposes, the purging flow may need to be increased for speedier measurement. In such a case our Teledyne InstaTrans transmitter is recommended, and a 4-20 mA line instead a gas sampling line is required.

Q: What is the expected Hysteresis effect on the Alarm Set points and Alarm Reset?

A: The code includes a 0.1% O2 hysteresis for alarms -- that is, the alarm will be set at the threshold.

The alarm will be cleared at 0.1% O2 below the threshold for a HI alarm.

The alarm will be cleared at 0.1% O2 above the threshold for a LO alarm.

When analyzing O2, N2 or Ar in liquid storage tanks, lag time is not a problem. However, if the measuring is done for process control purposes, the purging flow may need to be increased for speedier measurement. In such a case our Teledyne InstaTrans transmitter is recommended, and a 4-20 mA line instead a gas sampling line is required.

Q: What is the resistance of the Micro-fuel Cell adapter thermistor at 25°C. Is it 10 K or 16 K ohms?

A: The thermistor in the cellbock assembly for 3000 series analyzers is 16k ohm at 25°C.

Q: Regarding my 3000TB, the D/A converter for the 4-20mA output needs calibration. At a reading of 10 ppm gas, 1% of a 1000 ppm scale, the local display reads 10 ppm but the mA reading is 4.24 mA. It should be 4.16 mA. What do I do?

A: There is no adjustment possible on this unit. Instead, there is a offset error up to one percent of range between the display and the analog output.

If you are running at 10ppm concentration, consider programming a lower range from analysis (say from 1000 to 100ppm or less), so the analog output error due to offset would go from 10ppm to 1ppm.

A special pcb and software is available, however, as an option, which allows the user to fine tune the outputs both gain and offset.

Q: Where can I find the 4-20 mA output modules on the computer motherboard?

A: The 4-20ma modules are supplied on of two ways:

as a component from Analog Device, Part Number 1b-22 AN

(device with the white label) or

as a separate circuit board mounted on the top.

Q: We are servicing a 3000P analyzer and have found the sample inlet fitting at the rear of the instrument contains a small sintered filter that is blocked. What part is this?

A: That would be the flow restrictor. Replace it with P/N R2324 (install at inlet).

The restrictors are also included with the restrictor Kit p/n A68729. Refer to Appendix page A-7 in the 3000PA instruction manual.

Q: Do you have technical specifications for pneumatic valves from Nupro-Swagelok?

A: Please review the following documents:

DA Technical Report
DA Valves
DA to DP Conversion
DA Series Spare Parts

Q: When the 3020 and 2020 analyzers go into calibration mode, what happens to 4-20 output? Does it freeze at the last reading?

A: For 3020T, 3020P, and 2020 the analog output tracks when the analyzer enters calibration.

Q: What is the spike period for the 3000T?

A: Please refer to the following document: 3000T_spike_recovery_testing.pdf

Q: How do atmospheric conditions impact O2 sensor readings?

A: Please refer to the following document:

impact_of_atmospheric_conditions_on_O2_readings.pdf

Q: Do you have a replacement part number for the key pad with the buttons mounted on the board?

A: There are the two options for replacement of bad keypad.

1) For just the keypad replacement, order P/N D76672A (membrane keypad), and 3000TA label p/n B76673A.

2) The complete door assembly (including display board) for a model 3000TA is p/n C66285A.

Q: I purchased a new sensor for my 3000MB due the existing one having been damaged due to liquid intrusion. I would like to know if you have instructions available for replacing this sensor?

A: Refer to this diagram: D73379_sh_2.pdf

To replace the sensor only new nuts and ferrules are required.
The sensor is located behind the swing out door.

The sensor is item 1.
The mounting bracket is item 14.
The mounting plate it item 4.
There are four rubber vibration damping mounts Item 13.

Replace the sensor as follows:
Remove the sample lines by disconnecting the unions item 30.
Remove the retaining screws for item 14 (items 16 & 17).
Remove the 15 pin D-sub wiring cable from the side of the sensor.
Remove the sensor from the bracket item 14 by removing the four retaining nuts item 18
Remover the sensor from the mounting plate item 4 by removing the two mounting screws.

Note, new nuts and ferrules on must be installed on the sensor. This should be done prior to installation.

When installing the nuts and ferrules be careful not to loosen the connection on the sensor to prevent leaks Install the new sensor by reversion the above process. When connecting the sample lines, do not allow the sensors gas connections to rotate.

Flow N2 or O2 gas through the unit for 24 hours and adjust the zero and span pots as described in the users manual.

Q: How do you remove the rear-panel accessing board on the 3000 unit?

A: Refer to these instructions: Accessing Boards on 2000 3000.pdf

Q: On the 3000PB, what parameters contribute to the System Failure Alarm?

A: At power up self-test, or user-initiated self-test, if you get any of the following:

- preamp error
- dac error
- 5v/15v power error

then the system alarm is actuated.

Also, every 10 minutes or so, the 5V and 15V power supplies are tested, if they get an error then the system alarm is actuated.

The only way to clear the system alarm is to restart the analyzer.

Q: On the 3000PB, is there a way of detecting Cell Failure that can be tied into an alarm?

A: In a micro fuel cell sensor for Percent O2, one mode of failure is the signal drops out when the lead anode is fully depleted (as happens in a battery also). So one can detect this condition by setting a low O2 alarm. However, if your process you are monitoring has no O2, or very little, this approach may not be useful. This can be programmed in the field by the user. The loss of signal is not the only failure mode, however. Others are possible, depending on the application and types of gases present, if there is water or other condensables, etc.

Q: On the 3000PB, do you have information on Cell failure (MTBF)?

A: No, we do not publish an MTBF number on the sensors. In clean, dry inert gas applications, at room temps, the sensors will typically last from 6 months to a year in service, but since the lifetime is heavily application dependent, it has been difficult for us to publish this type of statistic that could be used in a SIL calculation. We have many users in the petrochem industries that use them in very nasty applications, in which cell life is short just do to the chemical exposure, and temperatures, etc.

Q: How do you install a probe hold-down clamp for the 3000PB?

A: These are the parts needed to install a probe hold-down clamp.

1 mounting pad P/N A9864
1 Probe retainer, P/N A13721
2 Spacers P/N A13722

The mounting pad with the two spacer is to be installed under the receptacle, and the clamp is held over the probe by two #6 x 32 screws into the threaded spacers.

See attached assembly drawing.

3000pb_retainer_probe_pn.pdf

Q: I am running some tests on a 3000ZA unit. It calibrates OK on the 0-100ppm range but when we go to the 0-100% range and apply air it reads 99.99%. If I try to cal on 20.9% the unit just says out of range. Can this only be calibrated on 80% plus O2 gas?

A: Each sensor need to calibrate independently so You need to select which sensor You are calibrate, i.e.: Low, Med or Hi.

The message during calibration means that the output of the sensor is too high, the amplifier is out of scale. This is strange, since you have a 0-96% sensor and you are feeding air. That is pointing to the sensor being bad because it has too much output or the amplifier being bad by having wrong voltages applied to the sensor.

To check the voltages applied to the sensor:

You will have to remove the back panel of the analyzer to have access to the amplifier.

Use a DVM to measure the bias voltage, black lead to TP5 and Red lead to U2-pin 1. It should measure 1.58 vdc +/- 0.2vdc

Use DVM to measure the sensor heater voltage, keep black lead at TP5, then move red lead to Q6-pin 3 (the left lead when looking from the back panel), it should measure 3.6 vdc +/- 0.2 vdc.

If these voltages are Ok, the sensor needs to be replaced, if not, probably the amplifier board. The problem is, if the amplifier is applying voltages that are too high, the sensor may be damage as a result, so it would advisable to replace both.

Q: I have a heater or heater circuit failure on a 3000TB. What parts do I need to buy to fix it?

A: Please see the attached print for parts and Teledyne part numbers.

B67446-4_3000TB_Heater_Assy_&_Wiring.pdf

Q: How does the heater circuit work in the 3000TB, when the AC power is 110 or 220V?

A: Please see the attached drawing:

3000tb_heater_circuit.pdf

When the unit's voltage selector switch is set to 110, two 110V heaters are in parallel and voltage is applied across these directly. In 220V, a diode is in series to give a rectification effect as show in the drawing to effectively reduce the voltage close to 110V

Q: Can I block the inlet and outlet of a unit purged with nitrogen to prevent oxygen contamination?

A: The unit is not designed to hold a low oxygen reading with no flow. Without flow, ambient O2 will leak in and cause the reading to rise. Special versions of the unit equipped with isolation valves are available.

Q: My Analyzer is set up for the B1 sensor, can I use the A5 instead without making any hardware changes?

A: Yes.

About Us

Founded in 1964, Teledyne Analytical Instruments manufactures gas and liquid analyzers, sensors and custom integrated analysis solutions. This includes hazardous area solutions meeting current NEC, ATEX and IECEx standards. TAI has an ISO 9001 certified quality management system in place.