Time/Temp Display

12.6 VAC Power Supply

Measure the transformer primary inoperative for a

 

 

nominal 120 VAC input. Measure the secondary

 

 

voltage output which will be 12.5 to 15 VAC

 

 

normally. Recheck secondary output at rear of

 

 

Time/Temp Display. Terminals 1 to 3 should read

 

 

12.5 to 15 VAC. Terminals 1 to 2 and 2 to 3 should

 

 

be exactly 1/2 of the reading across 1 to 3. If you

 

 

do not get the above secondary readings, replace

 

 

the transformer. If 120 VAC primary voltage is not

 

 

available, refer to the schematic and trace circuit

 

 

for incoming power failure. There is a 4 amp fuse in

 

 

each red secondary lead. These may be jumpered

 

 

(for test only) to determine if they are defective or

 

 

intermittent.

NOTE:

(Dual Belt Ovens)

Dual belt ovens utilize a double pole double throw

 

 

switch, which allows either of the optical encoders

 

 

to be read from a single Time/Temp. Display.

 

 

Check switch and replace as needed.

Temp Display out or

NOTE: Time/Temp displays

Place your pyrometer thermocouple into the center

inaccurate

use two types of temperature

between fingers T2 and T3 in the oven. Disconnect

 

sensor, Thermistor Probe – 2

the yellow tipped thermistor leads from the

 

yellow wires Thermocouple

time/temp. terminals 9 and 10. Measure the

 

Probe 1 red wire and 1 white

resistance of the thermistor probe. See chart on

 

wire

page 72 for proper resistance readings.

 

Thermistor Probe

Inspect the thermistor bulb for its proper location in

 

 

its spring holder. Check for short in leads where

 

 

they enter the sensor bulb. Also check each

 

 

thermistor lead for short to ground.

 

Thermocouple Probe

Place your pyrometer thermocouple into the center

 

 

between fingers T2 and T3 in the oven. Connect

 

 

temperature meter to thermocouple at terminals 9

 

 

& 10 on back of the time/temp display (Be sure to

 

 

maintain proper polarity on thermocouple

 

 

connections.) Compare actual oven temperature

 

 

with the reading at the time/temp display. If the

 

 

temperature readings match, recalibrate or replace

 

 

time/temp display. If the readings do not match,

 

 

replace thermocouple probe.

 

Erratic time/temp display

If strange or unusual behavior is experienced such

 

 

as a rolling of numbers, lock up at a given number,

 

 

first check for a display circuit lock up. This can be

 

 

caused by a voltage spike or surge. To eliminate

 

 

this condition remove power from the time/temp.

 

 

display by shutting off the main fan switch, or if

 

 

display stays on, (older models) circuit breaker

 

 

interruption may be required. This should eliminate

 

 

the problem. If the problem continues, jumper the

 

 

two fuses in the red wires leading from the 12.6

 

 

VAC transformer to the display. If this does not

 

 

solve the problem, it may be coming in through the

 

 

commercial power lines. Suggest that customer

 

 

contact his power company for evaluation.

 

Temp Display inaccurate

Perform the power supply check, the thermistor

 

erratic, or inoperative

probe check, and then perform the time/temp

 

 

simulator test. Refer to page 72 for instructions.

 

 

Remember, when using the time/temp simulator,

 

 

remove all the leads from the back of the display

 

 

except the 3 power leads. After completion of this

 

 

test and if reinstalling back into the oven, the dip

 

 

switches must be reset for oven operation.

44

Impinger I -–1000 Series Service Manual - International

Page 43 Page 45
Page 44
Image 44
Lincoln Series 1000, Series 1200 service manual
Page 43 Page 45

Series 1000, Series 1200 specifications

The Lincoln Series 1200 and Series 1000 are two distinguished models in the range of Lincoln Electric welding machines, epitomizing quality, versatility, and advanced technology for both industrial and residential welding applications.

The Lincoln Series 1200 is renowned for its robust build and high-performance capabilities. One of its main features is the ability to perform both MIG (Metal Inert Gas) and stick welding processes, making it a versatile option for various welding requirements. It incorporates an intuitive control panel that allows for easy settings adjustments, ensuring operators can swiftly adapt to different materials and thicknesses. The Series 1200 is equipped with a powerful drive system to provide smooth wire feeding, minimizing downtime due to jams or misfeeds. Additionally, its high-duty cycle support allows continuous operation, making it an ideal choice for professional welders and fabrication shops.

In terms of technology, the Series 1200 employs advanced inverter technology that enhances energy efficiency while reducing the machine’s overall weight. This results in portability without compromising power, making it a practical choice for on-site tasks. Moreover, the machine features an automatic voltage adjustment that optimizes performance based on the input voltage, ensuring reliable operation even under fluctuating power conditions.

On the other hand, the Lincoln Series 1000 is specifically designed for entry-level users and small projects. It shines with its user-friendly interface, which simplifies the welding process for beginners. This model typically includes pre-set parameters and an easy-to-read display, enabling novice operators to achieve excellent welds with minimal experience. Despite its entry-level focus, the Series 1000 does not skimp on performance, offering dependable results across various materials.

Both the Series 1200 and Series 1000 incorporate safety features, including thermal overload protection, ensuring that users can operate the machines with peace of mind. Their durable construction allows for prolonged use in tough work environments without sacrificing reliability.

In conclusion, the Lincoln Series 1200 and Series 1000 cater to a wide range of welding needs, from professional applications to home projects. Their respective features and technologies present options that can fit various skill levels while delivering exceptional welding performance and longevity. Whether you are a seasoned professional or a hobbyist, Lincoln Electric provides reliable solutions to meet your welding requirements.
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