I have turned to the SHG ovens:
- I noticed a lot of extra non twisted pair of homemade cabling between my ovens and the Newport 3040 so I redid the cables to both the ovens.
- (N.B. the Newport 3040 seems to have been discontinued, or at least is no longer searchable through google or the newport site)
- The manual said to use a 15 pin D sub with the following connections (twisted pairs on +/- pairs):
| Pin |
Purpose
|
My Wiring |
| 1 |
TEC+ |
N/C |
| 2 |
TEC+ |
To TEC |
| 3 |
TEC- |
To TEC |
| 4 |
TEC- |
N/C |
| 5 |
Ground |
Ground @ back of 3040 |
| 6 |
Ground |
Ground @ back of 3040 |
| 7 |
Sensor + |
To RTD |
| 8 |
Sensor - |
To RTD |
| 13 |
Interlock Send |
N/C |
| 15 |
Interlock return |
N/C |
- I hooked up each cable to the respective ovens, and followed the 3040 manuals instructions to do a "RTD Null" calibration - this is just calibrating out wire resistance for some display number, I am unsure if this does anything to the servo
- I noticed one of the temperature controllers did not servo the two displayed temperatures together
- Under Menu > System > Calibration > Set T Null ; doing the forward arrow twice changed this to null displayed temperature
- Both ovens now seem to be servoing the temperature to the setpoint.
Next - Figure out how to set these crappy temperature controllers up so that they are less crappy-
- It seems I have about 10 Proportional gain settings, but....
- I have NO Intergral gain setting, just a "slow" and "fast" setting, which seems to be the low frequency pole of the integrator according to the manual.
- Yes, that's correct, it seems like I can only move the integral pole between two frequencies, and am not allowed to change the gain.
- I shall explore this 20 item parameter space later.
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