Care & Maintenance - Elcometer 138 User Manual

5 USING THE CONDUCTIVITY METER (continued)
Using the HOLD function (Figure 8):
1 Press 'HOLD ENT' to freeze the measurement. The meter goes
into hold mode and the 'HOLD' indicator is displayed on screen.
The measurements are frozen and the 'MEAS' indicator
disappears.
2 Press 'HOLD ENT' again to release the measurement. The
'HOLD' indicator is no longer displayed. The meter reverts to
measurement mode.
Measurement
Mode
5.10 AFTER MEASUREMENT
1 Press the 'On/Off' button to switch the meter off.
2 Wash the sensor with tap water and wipe away any residual
water using a clean tissue.
3 Replace the sensor protection cap.
Note: If the meter is to remain unused for a long period of time, use pure water instead
of tap water to wash the sensor.
6 CARE & MAINTENANCE
The Elcometer 138E Conductivity Meter is designed to give many
years reliable service under normal operating conditions.
Always keep the sensor electrodes clean. Remove the plastic

cup and insert to thoroughly clean viscous solutions. Never
scratch electrodes with a hard surface.
For better performance, soak the electrode in alcohol for 10 to 15

minutes and rinse with pure water before starting any
measurement process. This is to remove any dirt and oil stains
on the electrode which may affect the accuracy of the
measurements.
Always store the components of the Elcometer 138 Kit in the

carrying case when the kit is not being used.
en-17
R
Figure 8: Hold Function
HOLD
ENT
HOLD
ENT
HOLD Mode Measurement
Mode
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