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Model 187 & 189
Users Manual
7-8
Function Range Resolution Accuracy
Resistance
1
500.00 Ω 0.01 Ω 0.05 % + 10
3
5.0000 kΩ 0.0001 kΩ 0.05 % + 2
50.000 kΩ 0.001 kΩ 0.05 % + 2
500.00 kΩ 0.01 kΩ 0.05 % + 2
5.0000 MΩ 0.0001 MΩ 0.15 % + 4
2
5.000 MΩ
up to
32.000 MΩ 0.001 MΩ 1.0 % + 4
2
32.0 MΩ
up to
50.0 MΩ 0.1 MΩ 3.0 % + 2
4
50.0 MΩ
up to
100.0 MΩ 0.1 MΩ 3.0% + 2
4
100.0 MΩ
up to
500.0 MΩ 0.1 MΩ 10.0 % + 2
4
Conductance 50.00 nS 0.01 nS 1 % + 10
1. For the 5,000 count mode, divide the number of least significant digits (counts) by 10.
2. For relative humidity greater than 70 %, resistance accuracy is 0.5 % over 1 MΩ and 2.5 % over 10 MΩ.
3. Using relative mode (REL ∆) to zero residual reading.
4. To ensure stated accuracy, switch to conductance mode and verify that the open circuit reading is less than 0.10 nS.