ISSPRO R5695 User Manual

Page 2

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Terminal. (If the leadwires are connected backwards, the pyrometer will read
backwards.) Use double nuts and lockwasher provided to attach the leadwire to each
stud and tighten the gauge in the panel. Do no loosen the nuts that are already on
the pyrometer gauge terminal studs. The pyrometer has been set to ambient (room)
temperature at the factory and should not require further adjustment.
Dual Scale Pyrometer R624. Connect the R660 leadwires from the left exhaust
pipe to the left meter and from the right exhaust pipe to the right meter, making sure
that the yellow leadwires connect to the positive terminals.

Notes:
1. If the pyrometer light is too bright, substitute a 28V lamp (GE# 656).
2. If the pyrometer is slow or erratic, check the leadwires and thermocouple with
an ohmmeter for continuity and check the leadwires for resistance (wire resistance is
0.23 ohms per foot per wire). Also, check for oil, grease, or looseness at the
terminals. The connection must be clean and tight. Testers are available from
ISSPRO to troubleshoot pyrometer systems.
3. The pyrometer is calibrated for use with 6 to 15 foot leadwires.
4. When properly installed, the accuracy of the system will be within 2% at 1200

°F

under average operating conditions.

Form No. IS119 (9/18/03 Rev. C) Page 2 of 2

Terminal. (If the leadwires are connected backwards, the pyrometer will read
backwards.) Use double nuts and lockwasher provided to attach the leadwire to each
stud and tighten the gauge in the panel. Do no loosen the nuts that are already on the
pyrometer gauge terminal studs. The pyrometer has been set to ambient (room)
temperature at the factory and should not require further adjustment.
Dual Scale Pyrometer R624. Connect the R660 leadwires from the left exhaust pipe
to the left meter and from the right exhaust pipe to the right meter, making sure that
the yellow leadwires connect to the positive terminals.

Notes:
1. If the pyrometer light is too bright, substitute a 28V lamp (GE# 656).
2. If the pyrometer is slow or erratic, check the leadwires and thermocouple with an
ohmmeter for continuity and check the leadwires for resistance (wire resistance is
0.23 ohms per foot per wire). Also, check for oil, grease, or looseness at the
terminals. The connection must be clean and tight. Testers are available from
ISSPRO to troubleshoot pyrometer systems.
3. The pyrometer is calibrated for use with 6 to 15 foot leadwires.
4. When properly installed, the accuracy of the system will be within 2% at 1200

°F

under average operating conditions.

Form No. IS119 (9/18/03 Rev. C) Page 2 of 2

Exhaust Manifold

Use double nuts &

Lockwasher here

Yellow

"+"

Red

"-"

R660 - "Length"
Leadwire

Thermocouple

Exhaust Pipe

R680

Weld to the pipe

IMPORTANT!
Don't Remove Factory
Installed Nuts from Pyrometer

6" Max.