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Old 05-13-2007, 03:38 PM
Mike Leary's Avatar
Mike Leary Mike Leary is offline
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The most challenging clock to program?

In reading Purp's post, he mentioned the Irritrol MC-Plus-A, has there ever
been a harder clock to work with? I've done Touch Commands, Total Controls,
Rain Masters...but that MC, made me feel humble!
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Old 05-13-2007, 04:59 PM
jerryrwm jerryrwm is offline
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Quote:
Originally Posted by Mike Leary View Post
In reading Purp's post, he mentioned the Irritrol MC-Plus-A, has there ever
been a harder clock to work with? I've done Touch Commands, Total Controls,
Rain Masters...but that MC, made me feel humble!
Remember the old Johns Manville controller with the DIP switches and the little log book attached to the face panel? Griswold had some that were kinda fun too. And don't forget some of those early Superior solid state models.
The MC+ is right up there with those brain-strainers.
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Old 05-13-2007, 05:08 PM
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Quote:
Originally Posted by jerryrwm View Post
Remember the old Johns Manville controller with the DIP switches and the little log book attached to the face panel? Griswold had some that were kinda fun too. And don't forget some of those early Superior solid state models.
The MC+ is right up there with those brain-strainers.
I'd forgotten about Griswold & I remembered the Weather-Matic mechanical
with a million knobs!
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Old 05-13-2007, 05:13 PM
jerryrwm jerryrwm is offline
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Quote:
Originally Posted by Mike Leary View Post
I'd forgotten about Griswold & I remembered the Weather-Matic mechanical
with a million knobs!
SSR-10. Helluva clock
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Old 05-13-2007, 05:15 PM
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Quote:
Originally Posted by jerryrwm View Post
SSR-10. Helluva clock
Sure got my attention when I was called in for a service call!
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Old 05-13-2007, 05:17 PM
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I remember the JM clock. Its faceplate looked like it was built around a pocket calculator. Batrow had a clock that operated individual mini-relays for each zone. Not surprising for a company whose reputation was made with a clock that toggled a stepping relay.

Best ever clock (NOT!!!) was an ancient Imperial that actually rotated a set of cams you had to adjust one at a time. One cam on. One cam off. Need to add time to one zone? Move the off cam, and then move all the cams for zones that follow, so runtimes don't overlap. Best of all, the clock was all line voltage, and it was very easy to touch a conductor when adjusting cams.
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Old 05-13-2007, 05:27 PM
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I can't remember what year (early eighties?) Griswold seemed like they were
going to be a player w/sensors, etc....whaat happened to them?
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Old 05-13-2007, 05:29 PM
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Griswold still lives, but they don't chase the irrigation market. Ever service their cast-iron-body valves?
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Old 05-13-2007, 05:41 PM
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It'd be cool to see who the designers were of those early "changed everything" clocks...Griswold..Hardie/Irritrol..the rest seemed to be
copycats & still seem to be buying each other's tech. Rain Master still lives!
Unless they hired the above to make the best of the best.
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Old 05-13-2007, 05:42 PM
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Griswold 2000 series diaphragm valves - absolute tanks.
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