Genesis SHERLOCK 102, Руководство по эксплуатации

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44-00-0297 SHERLOCK 102/202 REV. 4.1 05-02-15 40
CALIBRATION
Prior to shipment, all sensors manufactured by Genesis Interna-
tional, Inc. are factory calibrated. The calibration method will
set the base level (or Zero Level) and the gain (or Slope). As
the sensor gets older or the ambient conditions change drasti-
cally, the Zero Level may drift upward or downward. The Gain
(Slope) will not normally change.
Periodic adjustment (no more than every six months) of the
Zero Level is necessary to ensure that the Sherlock Sensor is
reading accurately. This function can be performed in a number
of different ways. The fi rst and most expeditious method is to
“offset” the Zero Level by programming an offset or by con-
ducting a Zero Calibration within the Sherlock control systems.
If calibration is beyond the offset limit (> 80) then the second
method is to adjust the zero offset on the sensor itself. More
complex method involving exposing the sensor to pre-measured
gas concentrations, mimicking one of the factory calibration
procedures. A Sherlock Refrigerant Sensor Calibration and Test
Kit is required for this method.
For CMOS sensor, turning the potentiometers CCW will lower
the readings, CW will raise the readings. After turning a poten-
tiometer, you must wait at least 30 seconds for the readings to
stabilize before making any other adjustments or continuing to
the next step.
For IR sensor, zeroing function is accomplished by pushing a
push button on the sensor for six seconds. Refer to the OPERA-
TIONS section of this manual.
Prior to continuing, ensure that the sensors are properly con-
nected to the SHERLOCK 2-Series Monitor and that the sensor
has been energized for over two hours.
1. Place the Sherlock into the Calibrate Sensor Mode
At DEFAULT SCREEN, using UP/DOWN buttons to scroll to
"<ACCESS MENU>". Press SELECT button. If the control
display shows "IN CHANGE MODE" or "ALL ACCESS"
mode, then press
EXIT Button. If not, press SELECT button,
changing the Control to "IN CHANGE MODE". Press EXIT
button.
Using UP/DOWN arrow buttons place the Sherlock into the
“<CALIBRATE MENU>”.
Press SELECT button.
Using UP/DOWN arrow buttons to scroll to function "CAL
SENSOR X" where “X” is the sensor being calibrated.
Press SELECT button. The display should state "SEL Button
TO CONFIRM".
Press SELECT button. The display should show "CALIBRA-
TION DONE".
NOTE: If the sensor is reading greater than 80, the sensor will
not calibrate. Check for gas leak around the sensor. If no leak is
found, do the calibration on the sensor itself then do the Control
sensor calibration again.
OR
Do the sensor calibration and follow the instructions for the
Measured Gas Calibration.
Please Note: The Zero Calibration procedure is usually all that is
needed for initial startup of the Electro-Chemical NH3 sensor.
Zero Calibration - Sherlock 102 & 202 Control,
CMOS and IR Sensors
EXIT
SELECT/
CHANGE
SELECT/
CHANGE
EXIT
<ACCESS MENU>
SELECT/
CHANGE
HOLD FOR APPROXIMATELY 6 SECONDS
<KEY LOCK MENU>
VIEW ONLY MODE
<KEY LOCK MENU>
IN CHANGE MODE
<KEY LOCK MENU>
ALL ACCESS MODE
SELECT/
CHANGE
SELECT/
CHANGE
<CAL> CALIBRATE
LEAK SENSOR A
<CAL> CALIBRATE
CONFIRM CAL.
<CAL> CALIBRATE
CALIBRATE DONE
SELECT/
CHANGE
<CALIBRATION MENU>