Honeywell UDA2182 manual ORP Calibration Using Voltage Input

Input Calibration

8.6.3ORP Calibration Using Voltage Input

Calibrates Analyzer only

The procedure described in this sub-section calibrates the Analyzer only. It does not involve compensating for electrode drift. Instead, a known millivolt signal is applied to the analyzer input terminals in place of the signal from the electrode, and the UDA2182 is adjusted so that its reading matches the known input.

ATTENTION

This procedure can only be used when measuring ORP only

Materials

The materials required to calibrate the Analyzer using a voltage input are:

•A source of a known millivolt signal.

•A screwdriver to fit the Analyzer input terminal screws and the terminal retainer.

Procedure

Make sure you have selected “PV Type –ORP” in the Inputs configuration – Table 6-5. Refer to Section 6.4.1 – General Rules for Editing.

To calibrate the ORP Analyzer using Voltage Input, follow the instructions in Table 8-7.

WARNING

This procedure should be performed by qualified personnel only. Disconnect the power before opening the instrument case. A potentially lethal shock hazard exists inside the case if the unit is opened while powered. More than one switch may be required to disconnect power.

Table 8-7 Procedure for Calibrating ORP Analyzer Using Voltage Input

Step	Action	Screen
1	Turn off the power to the Analyzer. More than one switch may be
	required to disconnect power.
2	With the power off open the case:
	Loosen the four captive screws on the front of the bezel.
	Grasp the bezel on the right side. Lift the bezel gently and swing
	the bezel open to the left. (The bezel and display assembly is
	mounted on pivot arms.)
3	Refer to Figure 7-1 for the location of the terminal board retainer.
	Loose the screws that hold the retainer and slide the retainer right
	or left until the retainer tabs disengage from the terminal boards.

154 UDA2182 Universal Dual Analyzer Product Manual January 2009