CTPH -Using the Cal-Lock Kit 6 , Using the BNS Input Adapter (Optional)

Using the Cal-Lock Kit 6
The CT485pH-CAL-LOCK kit that comes with the CT485pH is used to preserve and protect the settings that were entered into the CT485pH during the calibration process. The CT485pH-CAL-LOCK cover shields the HIGH, SET and LOW calibration buttons to prevent any additional button pressing. This method is more ôpermanentö than using the control panel door lock. HereÆs the procedure:
WARNING: USE EXTREME CAUTION WHEN USING THE GLUE. READ THE WARNING LABEL ON THE TUBE.

1. Calibrate the CT485pH.
2. Apply a small amount of glue to the back of the cover. Refer to Figure 6-1.
3. Place cover over calibration buttons.
4. Fill in the label information.
5. Apply label to cover as shown in Figure 6-2.

Figure 6-1. Glue Application

CAUTION: DO NOT LET GLUE COME IN CONTACT WITH BUTTONS.

Figure 6-2. Label Application

NOTE: An additional label is supplied for future calibrations. A damaged label or removal of the label implies that the calibration of the recorder may have been altered.

Using the BNC Input Adapter (Optional)
Use the optional BNC input adapter to record pH from a standard BNC probe without temperature compensation. For any mV signal as it:

0 pH	1 pH	2 pH	3 pH	4 pH	5 pH	6 pH
414mV	355mV	296mV	237mV	177mV	118mV	59mV

7 pH	8 pH	9 pH	10 pH	11pH	12 pH
0mV	-59	-118	-177	-237	-296

CAUTION: INPUT VOLTAGES GREATER THAN 20VDC OR 10VAC RMS MAY DAMAGE THE RECORDER.

Figure 7-1 shows a typical setup using the voltage input adapter.

Figure 7-1. Voltage Input Adapter Setup

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