RKI Instruments GD-K11D - Manual (Page 17)

Model GD-K11D Operator’s Manual Operation • 13
Operation
This section describes procedures to display the peak reading, and to adjust the alarm
point, alarm delay, and alarm type.
Displaying the Peak Reading
The Model GD-K11D defines the peak reading as the highest reading above the alarm point
since the last time the peak reading was reset. A reading must remain above the alarm
point for a period longer than the alarm delay (default is 3 seconds) before the Model
GD-K11D compares the gas reading to the current peak reading.
You must also “turn on” the peak reading feature in order for the Model GD-K11D to
recognize and save peak readings.
To turn on the peak reading feature:
1. Adjust the INT switch to the “5” position. The INT switch is the rotary switch located
on the amplifier circuit board (see Figure 1, Model GD-K11D Component Location.)
The SKIP light flashes. If 1 appears on the display screen, the peak hold feature is
turned on. If not, continue with step 2.
2. Press the MODE button, and make sure 5 appears on the left side of the display
screen.
3. Press the ∆ button to display 1 on the screen.
4. Press the SET button.
The SPAN light turns on.
5. Return the INT switch to the “0” position to return to normal operation.
The SPAN and SKIP lights turns off.
To display the peak reading:
1. From the normal screen, press the ∆ (PEAK) button.
The peak reading displays.
2. To reset the peak reading, press and hold down the ∆ (PEAK) and SET buttons until
the peak reading is cleared from the display screen.
Adjusting the Alarm Point
The factory-set alarm point is one-third of the fullscale value. Alarm points for the Model
GD-K11D’s target gases are listed in Table 2, Model GD-K11D Target Gases, Detection
Ranges, and Alarm Points. The range of acceptable alarm points is 10% to 100% of the
fullscale value.
To display the current alarm point, from the normal screen press and hold down the SET
button until the alarm point appears on the display screen. Release the SET button to
return to the normal screen.
To adjust the alarm point:
1. Loosen the thumbscrew at the top of the housing.
2. Rotate the housing cover toward the bottom of the housing to gain access to the
interior of the Model GD-K11D.