Specifications

3. Operation MI 611-211 – October 2005

Config Damping

(Refer to “Structure Diagram 3” on page 40.)

This section of the structure asks you to specify the damping response time (90% of step).

Choices are 1, 5, 10, 20, 40, and 120 seconds. Damping applies only to measurement data, not to

temperature data.

Config Chemcomp

(Refer to “Structure Diagram 3” on page 40.)

If measuring ISE, this section of the structure asks you to specify the chemical compensation

(CHEMCOMP) as STANDARD or CUSTOM. This is similar to what you did in “Config

Tempcomp” on page 19. CUSTOM causes you to specify a number of points (NUM PTS) to plot

a compensation curve. The number of points can be specified from 2 to 21 and has a default of 2

points. Each point specifies an absolute value (ABSx) and the value you want it to be (NEWx).

The values can be specified from 0 to 2000 ppm and have a default of 0. The decimal point

location for these values was determined as PRIMARY SCALE in CONFIG DISPLAY. The slope

of the curve cannot change direction or be zero between any two points. Deviation from this

requirement will cause an ER DATA message.

Config Instrmnt

(Refer to “Structure Diagram 4” on page 41.)

NOTE

This section is not displayed unless the correct passcode had been entered for

Configuration.

INSTRMNT mA CAL

This subsection allows you to tune the 4 mA and 20 mA values. The procedure is as follows:

1. Connect a digital voltmeter to the to the calibration terminals (see Figure 7).

2. With

INSTRMNT mA CAL displayed, press ENTER. The display will change to

mA CAL 4 mA. Press ENTER again.

3. Calibration is performed by having your voltmeter read 100 mV. Do this by selecting

one of the seven icons from the second line of your display by using the Left and

Right arrow keys. When you have highlighted the icon you want, press

ENTER. The

icon meanings (shown below) are (from left to right) large increase, medium increase,

small increase, accept and exit, small decrease, medium decrease, large decrease.

4. Repeat Step 3 until your meter reads 100 mV. Then highlight the center icon and

press ENTER. The display will go to mA CAL 20 mA. Press ENTER.

5. Repeat the procedure shown in Steps 3 and 4 for 20 mA. The voltage reading should

be 500 mV.