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Installation 5
389VP Instruction Manual Section 2: Installation
PN 51-389VP January 2013
Unpacking and inspection
Inspect the outside of the carton for any damage. If damage is detected, contact the carrier imme-
diately. Inspect the hardware. Make sure all the items in the packing list are present and in good
condition. Notify the factory if any part is missing. If the instrument appears to be in satisfactory
condition, proceed to Section 2.2, Mounting.
NOTE: Save the original packing cartons and materials as most carriers require proof of damage
due to mishandling, etc. Also, if it is necessary to return the instrument to the factory, you must
pack the instrument in the same manner as it was received. Refer to Section 6 for return instruc-
tions. If the sensor is to be stored, the vinyl boot should be filled with pH buffer solution and
replaced on sensor tip until ready for use.
Mounting
The sensor has been designed to be located in industrial process environments. Temperature and
pressure limitations must not be exceeded at any time. A Caution label regarding this matter is
attached to the sensor with the cable. Please do not remove the label. See Figure 2-1.
Mounting Guidelines:
1. Shake down the sensor to remove any air bubbles that may be present inside the tip of the pH
glass.
2. Do not install the sensor on the horizontal. The sensor must be 10° off the horizontal to ensure
accuracy.
3. Do not install the sensor upside down.
4. With the standard recessed electrode, air bubbles may become trapped in the sensor end. This
problem is most commonly encountered in areas of low flow or during calibration. Shake the
probe while immersed in solution to remove bubbles.
In most cases, the pH sensor can simply be installed as shipped, and readings with an accuracy of
± 0.2 pH may be obtained. To obtain greater accuracy or to verify proper operation, the sensor
must be calibrated as a loop with its compatible analyzer or transmitter.
2.1
2.2
Section 2: Installation
CAUTION
Buffer solution in the vinyl boot may cause skin or eye irritation.
WARNING
Glass electrode must be wetted at all times (in storage and in line) to maximize sensor life.
CAUTION
Internal electrolyte fill may cause skin or eye irritation