**SERVICE & REPAIR**

Kathleen Maynard, Service Manager - (781) 437-1140

state of the art equipment repair facility. We provide in-house and field

repair and maintenance services, complete training and programming classes,

as well as custom cable and electrical power distribution fabrication.

Our trained technical staff has years of experience working with control and dimming products

from EDI, ETC, Leprecon, NSI and numerous other manufacturers.

The following is a collection of math formulas that can prove useful.

Power:

**Richard Gagliardi**

**, Service Technician - (781) 437-1141**

**Brian Guiry****, Service Technician - (781) 437-1142**

**The**

**ALPS Technical Services Department**offers a great deal more than just astate of the art equipment repair facility. We provide in-house and field

repair and maintenance services, complete training and programming classes,

as well as custom cable and electrical power distribution fabrication.

Our trained technical staff has years of experience working with control and dimming products

from EDI, ETC, Leprecon, NSI and numerous other manufacturers.

Send The Service Department an E-mail.

Send The Service Department an E-mail.

The following is a collection of math formulas that can prove useful.

Power:

Watts = Volts * Amps

Amps = Watts / Volts

"640k ought to be enough for anybody." - Bill Gates, 1981

**Sine Wave (VAC):**

RMS Volts = 0.707 x Peak Volts

RMS Volts = 1.11 x Average Volts

Peak Volts = 1.57 x Average Volts

Peak Volts = 1.414 x RMS Volts

Average Volts = 0.637 x Peak Volts

Average Volts = 0.9 x RMS Volts

After eating, do amphibians need to wait an hour before getting
OUT of the water?

**DC voltage drop of conductor (cable) of L length**

V = voltage drop, I = current

R = resistance of conductor per 1000 feet

L = length of conductor in feet

R for 18awg = 6.51, 16awg = 4.09, 14awg = 2.58

12awg = 1.62, 10awg = 1.02, 8awg = 0.64

"As their numbers shrank from 80 to 8, the dwarves began to suspect
Hungry." - unknown

V = I * L * (R / 1000) * 1.004

Last night I played a blank tape at full blast. The mime nextdoor
went nuts.

**unit conversions:**

inches = millimeters / 25.4

millimeters = inches * 25.4

feet = meters / 0.3048

meters = feet * 0.3048

If olive oil comes from olives, where does baby oil come from?

footcandles = lux / 10.8

lux = footcandles * 10.8

Just think how much deeper the ocean would be if sponges didn't
live there.

Centigrade = 0.556 * (Fahrenheit - 32)

Fahrenheit = 1.8 * (Centigrade + 32)

I went for a walk last night, and my kids asked me how long I'd
be gone. I said, "The whole time."

pounds = kilograms * 2.205

kilograms = pounds * 0.454

"Being a Mac user is like being a Navy SEAL: a small, elite group
of people with access to the most

sophisticated technology in the world, who everyone calls on to
get the really tough jobs done

quickly and efficiently." - unknown

degrees = 180 * radians / PI

radians = PI * degrees /180

Whatever happened to Preparations A through G?

**pattern projection magnification and required pattern size:**

A = new pattern size, B = old pattern size,

C = new projection size, D = old projection size

P = projection magnification

Is it true that cannibals don't eat clowns because they taste

funny?

for standard AQ61 (or Altman 360Q) ellipsoidals, consider old pattern size to be 3" (size of gate), and old projection size to be the beam spread using the field angle information. Check diameter of gate (shutter plane opening) for other fixtures.

A = B * (C/D)

P = D / B

**distances, intensities, spreads, and angles:**

As seen in the above drawing:

D = throw distance, V = vertical height, H = horizontal distance,

C = focus angle off horizontal, K = focus angle off vertical,

F = beam or field angle of fixture

X = beam spread (beam oval width), Y = beam oval length

mf = beam spread multiplying factor

How come abbreviated is such a long word?

**footcandles:**

Footcandles = Candlepower / (D * D)

So what's the speed of dark?

**candlepower:**

Candlepower = Footcandles * (D * D)

If a cow laughed, would milk come out her nose?

**beam angle multiplying factor (mf)**:

mf = 2 * TAN(F / 2)

mf = X / D

If it's tourist season, why can't we shoot them?

**beam angle (F):**

F = 2 * ATAN(mf / 2)

F = 2 * ATAN(X / (2 * D) )

Whose cruel idea was it for the word "lisp" to have an "s" in
it?

**beam spread (oval width X if not straight on):**

X = D * (2 * TAN(F / 2))

X = D * mf

If you're sending someone some Styrofoam, what do you pack it in?

**beam oval length (Y) (when beam hits surface at angle):**

Y = V * ( TAN(K + F/2) - TAN(K - F/2) )

**throw distance (D):**

D = X / mf

D = SQUARE ROOT( (V * V) + (H * H) )

D = H / COS(C)

D = V / SIN(C)

D = H / SIN(K)

D = V / COS(K)

D = SQUARE ROOT(Candlepower / Footcandles)

Why don't they just make mouse-flavored cat food?

**horizontal distance (H):**

H = SQUARE ROOT( (D * D) - (V * V) )

H = V / TAN(C)

H = D * COS(C)

H = D * SIN(K)

H = V * TAN(K)

I just got skylights put in my place. The people who live

above me are furious.

**vertical height (V):**

V = SQUARE ROOT( (D * D) - (H * H) )

V = H * TAN(C)

V = D * SIN(C)

V = D * COS(K)

V = H / TAN(K)

**focus angle off horizontal (C):**

C = ATAN(V / H)

C = ASIN(V / D)

C = 90 - ASIN(H / D)

C = 90 - K

**focus angle off vertical (K):**

K = ATAN(H / V)

K = ASIN(H / D)

K = 90 - ASIN(V / D)

K = 90 - C