SERVICE BULLETIN #95-5

 

FROM – National Service Department

BULLETIN NO.. #95-5

 

TO – National Service Binder Holders

DATE – February 24, 1995

Subject:

Subject: Thermocouples used in the Chain Griddle

 

Models CG-36, CG-48, CG-60 & CG-72

This bulletin supplements the chain Griddle Service Manual with a description of the basics of thermocouple theory and how to use the degree/millivolt tables issued as part of this bulletin.. This bulletin deals with the thermocouple only and how it registers temperature changes..

The type J thermocouple on the new Chain Griddle measures the plate temperature within a range of accuracy of 2˚F to 4˚F.. The J designation refers to the conductors used and, therefore, the thermoelectric characteristics of the conductors that form the thermocouple.. In the Type J unit, the conductors are iron and the alloy constantan.. Constantan is an alloy of copper and nickel.. Thermocouple technology for sensing temperature has been in use for a long time but the Type J thermocouple is new to Garland Commercial Ranges Limited applications..

To dissimilar metals joined together, as in Figure 1, cause a thermoelectric current to flow in the circuit formed when the junctions are at different temperatures.. The current will continue to flow as along as the junctions (T1 and T2) remain at different temperatures.. Thermoelectricity is the direct conversion of heat into electricity and vice versa.. The electric motive force (emf) producing the current is called the “Seebeck Thermal Emf” (Seebeck after the discoverer), and is proportional to the temperature difference between the two junctions..

Three laws govern the way thermocouples work: the law of homogeneous circuits, the law of intermediate metals and the law of successive or intermediate temperatures.. The first law is that a thermocouple circuit must use different metals; the second is that a third metal introduced will not affect the couple provided it is maintained at the same temperature along its entire length; the third provides a means of relating the emf generated to a standardized constant temperature.. Refer to a textbook about thermocouples for a fuller explanation of these laws..

 

 

 

 

Metal A

 

 

T1 junction

 

 

I

 

 

T2 junction

 

 

 

 

 

Metal B

 

V

Metal B

T = Temperature

 

 

Figure 1

I = Current

 

 

 

 

 

 

 

 

V = Voltage (emf)

 

 

 

 

 

 

If the cold junction is at a known or reference temperature it is a simple matter to compare this with the hot junction at the probe of the thermocouple to obtain an accurate measure of the hot junction temperature.. In practice, the cold junction is eliminated by the use of electrical or hardware compensating methods..

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Part #GCGTRAINING06 (03/03/08))

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Garland CG-60, CG-24, CG-36, CG-48, CG-72 service manual Service Bulletin #95-5, Subject
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CG-60, CG-72, CG-48, CG-36, CG-24 specifications

The Garland CG series is renowned for its dependable and innovative design, catering to diverse needs in commercial kitchens. The series includes models CG-24, CG-72, CG-48, CG-60, and CG-36, each with unique features that make them suitable for various culinary tasks.

Starting with the CG-24, this compact unit is designed for restaurants with limited space but a high demand for efficiency. The CG-24 offers a single deck oven with a capability to yield remarkable results without compromising on quality. Its adjustable temperature settings allow for precision cooking, while the stainless steel exterior ensures durability and easy maintenance. The commercial-grade heating elements provide consistent heat distribution, making it ideal for baking and roasting.

Next is the CG-72, a larger model designed for high-volume operations. The CG-72 boasts a double-deck construction, allowing chefs to prepare multiple dishes simultaneously. Its advanced convection technology circulates hot air evenly throughout the oven, enhancing cooking efficiency. This model also features programmable digital controls, giving chefs the ability to save and replicate cooking profiles with ease, ensuring consistency across multiple dishes.

The CG-48 is tailored for versatility, featuring multiple cooking options that include baking, broiling, and warming. Its spacious interior can accommodate various tray sizes, making it a favorite amongst bakers and caterers. With user-friendly controls and high-performance heating systems, the CG-48 ensures that food is cooked to perfection every time. Additionally, its efficient energy usage makes it a cost-effective choice for businesses seeking to reduce operating expenses.

Moving on to the CG-60, this model integrates cutting-edge technologies to enhance sanitation and ease of use. The CG-60’s self-cleaning feature significantly reduces labor and time spent on maintenance, while its robust construction ensures longevity under heavy use. The digital interface allows for precise control over cooking times and temperatures, making it a reliable partner in busy kitchen environments.

Finally, the CG-36 offers a balance of size and power, making it ideal for medium-sized operations. Its range of cooking options alongside efficient heat distribution makes it a versatile choice for chefs. The compact design does not sacrifice performance, ensuring that even small footprints can accommodate high culinary output.

In summary, the Garland CG series combines advanced technology with practical design, ensuring that each model—CG-24, CG-72, CG-48, CG-60, and CG-36—meets the diverse needs of commercial kitchens, delivering exceptional performance, durability, and user-friendly operation.
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