Infrared Sensor Troubleshooting Guide; Checking Or Changing Filter Element - Miller 301182 Owner's Manual

7-4. Infrared Sensor Troubleshooting Guide

Problem
Err
Low
High
Open
ProHeat displays a temperature
instead of _LO_ at ambient.

7-5. Checking Or Changing Filter Element

1
2
3
OM-261823 Page 28
Cause
Infrared sensor is connected but
temperature is not in range.
Infrared sensor is connected but
temperature output is below sensor
range.
Infrared sensor is connected but
temperature output is above sensor
range.
No thermal couple measuring device
detected.
Shiny parts may reflect enough light
energy to represent a warm spot.
Potential Solution
Verify settings on ProHeat are set for IR 4−20 mA, and temp range is
set to 212°F−752°F (100°C−400°C) if infrared sensor is attached.
Verify settings on ProHeat are set for K TC if thermocouple measuring
device is attached.
The "Low" setting is +/− 41°F (5°C) of the low limit of the infrared sensor
temperature range of 212°F (100°C).
If necessary, use alternative method to verify temperature of material be-
ing heated.
The "High" setting is +/− 41°F (5°C) of the high limit of the infrared sensor
temperature range of 752°F (400°C).
If necessary, use alternative method to verify temperature of material be-
ing heated.
If infrared sensor is connected, verify settings on ProHeat are set for an
infrared sensor. Verify continuity of cable connections replace if neces-
sary.
Verify infrared sensor is working correctly, replace if necessary.
If thermocouple measuring device is connected, verify continuity of exten-
sion cable and measuring device, replace if necessary.
Verify emissivity of part.
1 Filter Bases
2 Filter Elements
3 Filter Cups
Unscrew filter cup from base.
Unscrew filter element from base.
Check filter element for dirt and
moisture, and replace if necessary.
Reinstall filter element and secure
filter sup. Do not over-tighten.
Ref. 262 416-B