3.2 MAIN BOARD POWER JUMPERS (Continued)
S2 jumpers are for sensor break indications:
* S2Ajumper is not used
* S2B jumper is for positive sensor break on input 1 (i.e. heating)
* S2C jumper is for positive sensor break on input 2 (i.e. heating)
* S2D is not used
S3 jumpers are used for the following (refer to Table 3-1):
* To enable or disable the front panel push-buttons
* To allow for an extremely low resistance load for analog output
* To disable the MENUbutton
* To perform calibration procedure
Test pins TP1 - TP11 are for testing purposes. Do not use as reading errors may
result.
Table 3-1 S3 Jumper Functions Jumper Description
S3-A Install to enable front panel push-buttons.
Remove to disable all front panel push-buttons
S3-B Removed. Install for factory calibration only.
S3-C Normally removed. Install for analog voltage output when load is less than
1 Kohm impedance. Care should be taken when installing this jumper.
S3-D Removed. Not used.
S3-E If installed without S3-B, the MENU button locks out.
While in run mode, if you press the MENU button, the display shows
“LOCK".
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