Instructions

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9. Subtract the first test result from the second test result to obtain the additional loop resistance created
by the new lead set.
If the result is negative, the second lead set resistance is less that the standard supplied lead set and
should not be used for loop testing on this instrument.
If the result is greater than 0.99 Ω, the instrument will not be able to take fully into account of the extra
lead resistance. In this instance do not use the lead set or manually subtract the difference from every
subsequent measurement.
To enter the additional lead resistance to correct the instrument measurements:
10. Select [SETUP] on the instrument lower range knob
11. Press the [ ] button until the display shows ‘Null’.
12. Press the [TEST] button to select the function.
13. Press the [ ] button until the display shows the additional resistance required.
14. Press the [TEST[ button to store the offset. The display will show Ok to confirm setting has been
saved.
15. The display will show the [ ] as a reminder to warn of there is a loop resistance offset selected.
To remove loop test Offset:
16. Select [SETUP] on the instrument lower range knob
17. Press the [ ] button until the display shows ‘Null’.
18. Press the [TEST] button to select the function.
19. Press the [ ] button until the display shows 0.00. Button can be held down to automatically
count up.
20. Press the [TEST] button to store the offset.
21. The [ ] symbol will now disappear.
8.3 Backlight brightness adjust
The backlight has four levels
• OFF (Disabled)
• Low (Default)
• Medium
• High
To adjust the backlight brightness (or disable backlight completely):
1. Select [SETUP] on the instrument lower range knob
2. Press the backlight button [ ] repeatedly to achieve the desired setting.
Exit SETUP mode by turning the lower range knob to any other position.