PTR 225 / PTR 225 S PTR 237 - Schoonover, Inc.
PTR 225 / PTR 225 S PTR 237 - Schoonover, Inc. PTR 225 / PTR 225 S PTR 237 - Schoonover, Inc.
Note When using the transmitter chiefly in the UHV range (< 10 -8 mbar) it is recommended to remove the cathode plate. This helps to the reduce the surface area of the surfaces which may release gas. How to proceed in order to detach the electronics assembly is described in Section 3.3 (cleaning of the sensor). Permissible bake out temperatures: Sensing cell of the PTR 225 / PTR 225 S: 200 °C (with ultra sealing disc) Sensing cell of the PTR 237: 350 °C 2.4 Troubleshooting No LED is on. Possible cause: Supply voltage is missing. The „POWER“ LED (6/1) is on, the „READY“ LED (6/2) is not on. Possible cause: • High tension has not been activated. • Pressure has dropped below 3·10 -9 mbar. • The gas discharge has not ignited. • Sensing cell not properly connected to the electronics assembly (e.g. after maintenance). • Missing anode ring (e.g. after maintenance). The measurement signal is always greater than 10 V even if the pressure is much lower than 10 -2 mbar. Possible cause: Short circuit in the sensing cell. Remedy: Clean the sensing cell. For this refer to Section 3.3. During pumpdown the measurement signal remains at some level although the pressure is dropping. Possible cause: Contamination within the sensing cell. Remedy: Replace the sensing cell. 18 GA 09.308/4.02 - 05/97 18
3 Maintenance 3.1 LEYBOLD Service If equipment is returned to LEYBOLD, indicate whether the equipment free of substances damaging to health or whether it is contaminated. If it is contaminated also indicate the nature of the hazard. For this you must use a form which has been prepared by us which we will provide upon request. A copy of this form is reproduced at the end of these Operating Instructions: „Declaration of Contamination of Vacuum Instruments and Components“. Please attach this form to the equipment or enclose it with the equipment. This Declaration of Contamination is required to meet German Law and to protect our personnel. LEYBOLD must return any equipment without a „Declaration of Contamination“ to the sender’s address. 3.2 The Electronics Assembly The electronics assembly of the PENNING transmitters PTR 225, PTR 225 S or PTR 237 does not require any maintenance. 3.3 Cleaning the Sensor Warning A high tension which is dangerous when touched is applied to the sensor in the PENNING transmitter. You must always switch off the supply voltage for the transmitter before starting any work on the transmitter (even when removing the transmitter from the connection flange) so as to avoid injury when inadvertently coming in to contact with the high tension. 3.3.1 Detaching the Electronics Assembly In order to detach the electronics assembly and the magnet assembly (7/1) you must loosen the two cross head screws which can be accessed through two holes GA 09.308/4.02 - 05/97 19 19
- Page 1 and 2: Vacuum Pumps Instrumentation Fittin
- Page 3 and 4: 1 Description 1.1 General The PENNI
- Page 5 and 6: Status displays Operation (POWER) R
- Page 7 and 8: 0.66 V to 10 V. Moreover, the high
- Page 9 and 10: 73 80 POWER READY 114 126 4 12 DN 2
- Page 11 and 12: + 10,5 V High tension switchover 2,
- Page 13 and 14: 2.2.3 Measurement Signal Output The
- Page 15 and 16: 2.2.7 Monitor Output The monitor ou
- Page 17: 2.3.2 Measurement System Status Ind
- Page 21 and 22: In the case of severe contamination
- Page 23 and 24: Characteristic PTR 225 / PTR 225 S
- Page 25 and 26: 1 TTR 211 S 3 5 0...10 V 2 1 PTR 22
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3 Maintenance<br />
3.1 LEYBOLD Service<br />
If equipment is returned to LEYBOLD, indicate whether<br />
the equipment free of substances damaging to health or<br />
whether it is contaminated. If it is contaminated also indicate<br />
the nature of the hazard. For this you must use a<br />
form which has been prepared by us which we will provide<br />
upon request.<br />
A copy of this form is reproduced at the end of these<br />
Operating Instructions: „Declaration of Contamination of<br />
Vacuum Instruments and Components“.<br />
Please attach this form to the equipment or enclose it<br />
with the equipment.<br />
This Declaration of Contamination is required to meet<br />
German Law and to protect our personnel.<br />
LEYBOLD must return any equipment without a „Declaration<br />
of Contamination“ to the sender’s address.<br />
3.2 The Electronics Assembly<br />
The electronics assembly of the PENNING transmitters<br />
<strong>PTR</strong> <strong>225</strong>, <strong>PTR</strong> <strong>225</strong> S or <strong>PTR</strong> <strong>237</strong> does not require any<br />
maintenance.<br />
3.3 Cleaning the Sensor<br />
Warning<br />
A high tension which is dangerous when<br />
touched is applied to the sensor in the<br />
PENNING transmitter.<br />
You must always switch off the supply<br />
voltage for the transmitter before starting<br />
any work on the transmitter (even when<br />
removing the transmitter from the<br />
connection flange) so as to avoid injury<br />
when inadvertently coming in to contact<br />
with the high tension.<br />
3.3.1 Detaching the Electronics Assembly<br />
In order to detach the electronics assembly and the<br />
magnet assembly (7/1) you must loosen the two cross<br />
head screws which can be accessed through two holes<br />
GA 09.308/4.02 - 05/97<br />
19<br />
19
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